From 31913a8524edf97ad79f9f895d6ac5761b9b2fd7 Mon Sep 17 00:00:00 2001
From: Ori Bernstein <ori@eigenstate.org>
Date: Sun, 19 Feb 2023 20:44:56 -0500
Subject: [PATCH] mkfiles: add 'mk test' support

9front has several tests scattered throughout the source,
as well as more tests in an external 'regress' repository.
Many of these tests are broken, because there is no easy
way to build and track all of them.

This pulls in several tests from different sources, deletes
the broken tests, tests with missing data, and adds a single
command that can be run from the root of the src directory
to test our system.

The hope is that as we develop new code, we add more tests,
and eventually start running the tests on every commit.
Please enter the commit message for your changes. Lines starting
---
 acme/mkfile                                |   4 +-
 sys/lib/git/common.rc                      |   5 +-
 sys/src/ape/mkfile                         |   3 +
 sys/src/cmd/audio/flacdec/mkfile           |   5 +-
 sys/src/cmd/audio/flacenc/mkfile           |   3 +
 sys/src/cmd/audio/mkfile                   |   6 +
 sys/src/cmd/audio/mp3enc/mkfile            |   4 -
 sys/src/cmd/audio/oggdec/mkfile            |   3 +
 sys/src/cmd/audio/oggenc/mkfile            |   3 +
 sys/src/cmd/bzip2/mkfile                   |  14 -
 sys/src/cmd/cwfs/mkfile                    |   3 +
 sys/src/cmd/git/add                        |   0
 sys/src/cmd/git/commit                     |   0
 sys/src/cmd/git/compat                     |   0
 sys/src/cmd/git/diff                       |   0
 sys/src/cmd/git/import                     |   0
 sys/src/cmd/git/rebase                     |   0
 sys/src/cmd/git/revert                     |   0
 sys/src/cmd/git/test/add.expected          |   9 +
 sys/src/cmd/git/test/add.rc                |  34 ++
 sys/src/cmd/git/test/basic.rc              |  67 ++++
 sys/src/cmd/git/test/export.rc             |  40 +++
 sys/src/cmd/git/test/lca.rc                |  68 ++++
 sys/src/cmd/git/test/merge.rc              |  92 +++++
 sys/src/cmd/git/test/mkfile                |  11 +
 sys/src/cmd/git/test/range.rc              |  75 ++++
 sys/src/cmd/git/test/util.rc               |  17 +
 sys/src/cmd/ktrans/mkfile                  |   3 -
 sys/src/cmd/mkfile                         |   3 +
 sys/src/cmd/mklib                          |   6 +
 sys/src/cmd/mkmany                         |   7 +
 sys/src/cmd/mkone                          |   9 +
 sys/src/cmd/mksyslib                       |   6 +
 sys/src/cmd/mktest                         |  41 +++
 sys/src/cmd/nusb/mkfile                    |   5 +
 sys/src/cmd/postscript/mkfile              |   3 +
 sys/src/cmd/spell/mkfile                   |   5 -
 sys/src/cmd/test/date.rc                   |  91 +++++
 sys/src/cmd/test/mkfile                    |   9 +
 sys/src/cmd/test/patch/basic.expected      | 100 ++++++
 sys/src/cmd/test/patch/basic.in            |  93 +++++
 sys/src/cmd/test/patch/basic.patch         |  42 +++
 sys/src/cmd/test/patch/create.expected     |  12 +
 sys/src/cmd/test/patch/create.patch        |  15 +
 sys/src/cmd/test/patch/delete.expected     |  10 +
 sys/src/cmd/test/patch/delete.patch        |  15 +
 sys/src/cmd/test/patch/header.expected     | 100 ++++++
 sys/src/cmd/test/patch/header.in           |  93 +++++
 sys/src/cmd/test/patch/header.patch        |  54 +++
 sys/src/cmd/test/patch/mkfile              |   5 +
 sys/src/cmd/test/patch/multifile.patch     |  89 +++++
 sys/src/cmd/test/patch/multifile1.expected |  69 ++++
 sys/src/cmd/test/patch/multifile1.in       |  93 +++++
 sys/src/cmd/test/patch/multifile2.expected |  19 ++
 sys/src/cmd/test/patch/multifile2.in       |  21 ++
 sys/src/cmd/test/patch/nop.expected        |  10 +
 sys/src/cmd/test/patch/patch.rc            |  39 +++
 sys/src/cmd/test/ramfs.rc                  |  40 +++
 sys/src/cmd/test/test.rc                   | 135 ++++++++
 sys/src/cmd/test/zones.rc                  |  19 ++
 sys/src/cmd/upas/binscripts/mkfile         |   3 +
 sys/src/cmd/upas/mkfile                    |  11 +
 sys/src/cmd/vl/mkfile                      |   6 -
 sys/src/libc/mkfile                        |   3 +
 sys/src/libc/test/date.c                   | 377 +++++++++++++++++++++
 sys/src/libc/test/mkfile                   |   8 +
 sys/src/libc/test/pow.c                    |  69 ++++
 sys/src/libc/test/strchr.c                 |  47 +++
 sys/src/libmp/mkfile                       |   5 +
 sys/src/libmp/test/main.c                  |   1 +
 sys/src/libmp/test/mkfile                  |   7 +-
 sys/src/libsec/mkfile                      |   3 +
 sys/src/libstdio/mkfile                    |   3 -
 sys/src/mkfile                             |   2 +-
 74 files changed, 2228 insertions(+), 44 deletions(-)
 mode change 100644 => 100755 sys/src/cmd/git/add
 mode change 100644 => 100755 sys/src/cmd/git/commit
 mode change 100644 => 100755 sys/src/cmd/git/compat
 mode change 100644 => 100755 sys/src/cmd/git/diff
 mode change 100644 => 100755 sys/src/cmd/git/import
 mode change 100644 => 100755 sys/src/cmd/git/rebase
 mode change 100644 => 100755 sys/src/cmd/git/revert
 create mode 100644 sys/src/cmd/git/test/add.expected
 create mode 100755 sys/src/cmd/git/test/add.rc
 create mode 100755 sys/src/cmd/git/test/basic.rc
 create mode 100755 sys/src/cmd/git/test/export.rc
 create mode 100755 sys/src/cmd/git/test/lca.rc
 create mode 100755 sys/src/cmd/git/test/merge.rc
 create mode 100644 sys/src/cmd/git/test/mkfile
 create mode 100755 sys/src/cmd/git/test/range.rc
 create mode 100755 sys/src/cmd/git/test/util.rc
 create mode 100644 sys/src/cmd/mktest
 create mode 100755 sys/src/cmd/test/date.rc
 create mode 100644 sys/src/cmd/test/mkfile
 create mode 100644 sys/src/cmd/test/patch/basic.expected
 create mode 100644 sys/src/cmd/test/patch/basic.in
 create mode 100644 sys/src/cmd/test/patch/basic.patch
 create mode 100644 sys/src/cmd/test/patch/create.expected
 create mode 100644 sys/src/cmd/test/patch/create.patch
 create mode 100644 sys/src/cmd/test/patch/delete.expected
 create mode 100644 sys/src/cmd/test/patch/delete.patch
 create mode 100644 sys/src/cmd/test/patch/header.expected
 create mode 100644 sys/src/cmd/test/patch/header.in
 create mode 100644 sys/src/cmd/test/patch/header.patch
 create mode 100644 sys/src/cmd/test/patch/mkfile
 create mode 100644 sys/src/cmd/test/patch/multifile.patch
 create mode 100644 sys/src/cmd/test/patch/multifile1.expected
 create mode 100644 sys/src/cmd/test/patch/multifile1.in
 create mode 100644 sys/src/cmd/test/patch/multifile2.expected
 create mode 100644 sys/src/cmd/test/patch/multifile2.in
 create mode 100644 sys/src/cmd/test/patch/nop.expected
 create mode 100755 sys/src/cmd/test/patch/patch.rc
 create mode 100755 sys/src/cmd/test/ramfs.rc
 create mode 100755 sys/src/cmd/test/test.rc
 create mode 100755 sys/src/cmd/test/zones.rc
 create mode 100644 sys/src/libc/test/date.c
 create mode 100644 sys/src/libc/test/mkfile
 create mode 100644 sys/src/libc/test/pow.c
 create mode 100644 sys/src/libc/test/strchr.c

diff --git a/acme/mkfile b/acme/mkfile
index 002e4de25..cfe82ab8a 100644
--- a/acme/mkfile
+++ b/acme/mkfile
@@ -1,9 +1,9 @@
 </$objtype/mkfile
 
 none:VQ:
-	echo mk all, install, clean, nuke, installall, update
+	echo mk all, install, clean, nuke, installall, update, test
 
-all install clean nuke installall update:V:
+all install clean nuke installall update test:V:
 	@{cd bin/source; mk $target}
 	@{cd news/src; mk $target}
 	@{cd wiki/src; mk $target}
diff --git a/sys/lib/git/common.rc b/sys/lib/git/common.rc
index dd434265a..63a2e1602 100644
--- a/sys/lib/git/common.rc
+++ b/sys/lib/git/common.rc
@@ -84,10 +84,11 @@ fn merge1 {@{
 		base=/dev/null
 	if(! test -f $theirs)
 		theirs=/dev/null
-	if(! ape/diff3 -3 -m $ours $base $theirs > $tmp)
-		echo merge needed: $out >[1=2]
 
 	if(mergeperm $ours $base $theirs){
+		mkdir -p `{basename -d $tmp}
+		if(! ape/diff3 -3 -m $ours $base $theirs > $tmp)
+			echo merge needed: $out >[1=2]
 		mv $tmp $out
 		git/add $out
 		chmod $mergedperms $out
diff --git a/sys/src/ape/mkfile b/sys/src/ape/mkfile
index 78732bd0e..2f519c5e2 100644
--- a/sys/src/ape/mkfile
+++ b/sys/src/ape/mkfile
@@ -27,3 +27,6 @@ cmd.%:V:
 9src.%:V:
 	cd 9src
 	mk $stem
+
+test:VQ:
+	# nothing
diff --git a/sys/src/cmd/audio/flacdec/mkfile b/sys/src/cmd/audio/flacdec/mkfile
index 89340bda7..0c88bed05 100644
--- a/sys/src/cmd/audio/flacdec/mkfile
+++ b/sys/src/cmd/audio/flacdec/mkfile
@@ -4,7 +4,7 @@
 TARGET=flacdec
 
 CC=pcc
-CFLAGS=-I. -I../libFLAC -I../libFLAC/FLAC -D_POSIX_SOURCE -D_BSD_EXTENSION -DPlan9 -c
+CFLAGS=-I. -I../libFLAC -I../libFLAC/FLAC -D_POSIX_SOURCE -D_BSD_EXTENSION -DPlan9
 
 %.$O: %.c
 	$CC $CFLAGS -c $stem.c
@@ -19,3 +19,6 @@ clean:V:
 
 install:V: $O.$TARGET
 	cp $O.$TARGET $BIN/$TARGET
+
+test:VQ:
+	# nothing
diff --git a/sys/src/cmd/audio/flacenc/mkfile b/sys/src/cmd/audio/flacenc/mkfile
index f8bc3a111..59792f545 100644
--- a/sys/src/cmd/audio/flacenc/mkfile
+++ b/sys/src/cmd/audio/flacenc/mkfile
@@ -19,3 +19,6 @@ clean:V:
 
 install:V: $O.$TARGET
 	cp $O.$TARGET $BIN/$TARGET
+
+test:VQ:
+	# nothing
diff --git a/sys/src/cmd/audio/mkfile b/sys/src/cmd/audio/mkfile
index 9739e1492..5116edca0 100644
--- a/sys/src/cmd/audio/mkfile
+++ b/sys/src/cmd/audio/mkfile
@@ -60,3 +60,9 @@ safeinstallall:V:
 		cd $i
 		mk clean
 	}
+
+test:V:
+	for (i in $DIRS) @{
+		cd $i
+		mk test
+	}
diff --git a/sys/src/cmd/audio/mp3enc/mkfile b/sys/src/cmd/audio/mp3enc/mkfile
index 828fb5f57..b005bea67 100644
--- a/sys/src/cmd/audio/mp3enc/mkfile
+++ b/sys/src/cmd/audio/mp3enc/mkfile
@@ -59,7 +59,3 @@ LDFLAGS= # -p
 
 testcase.new.mp3: testcase.wav $O.out
 	$O.out --nores -h testcase.wav testcase.new.mp3
-
-test:V: testcase.new.mp3
-	cmp -l testcase.new.mp3 testcase.mp3 | wc -l
-	rm testcase.new.mp3
diff --git a/sys/src/cmd/audio/oggdec/mkfile b/sys/src/cmd/audio/oggdec/mkfile
index 04c36366d..e22711d33 100644
--- a/sys/src/cmd/audio/oggdec/mkfile
+++ b/sys/src/cmd/audio/oggdec/mkfile
@@ -19,3 +19,6 @@ clean:V:
 
 install:V: $O.$TARGET
 	cp $O.$TARGET $BIN/$TARGET
+
+test:VQ:
+	# nothing
diff --git a/sys/src/cmd/audio/oggenc/mkfile b/sys/src/cmd/audio/oggenc/mkfile
index 313d57e4a..e2b8a8bd2 100644
--- a/sys/src/cmd/audio/oggenc/mkfile
+++ b/sys/src/cmd/audio/oggenc/mkfile
@@ -19,3 +19,6 @@ clean:V:
 
 install:V: $O.$TARGET
 	cp $O.$TARGET $BIN/$TARGET
+
+test:VQ:
+	# nothing
diff --git a/sys/src/cmd/bzip2/mkfile b/sys/src/cmd/bzip2/mkfile
index b456a1d48..8f2f6d5c3 100644
--- a/sys/src/cmd/bzip2/mkfile
+++ b/sys/src/cmd/bzip2/mkfile
@@ -18,20 +18,6 @@ BIN=/$objtype/bin
 
 CFLAGS=$CFLAGS -p -DPLAN9 -Ilib
 
-test:V: $O.bzip2 $O.bunzip2
-	./$O.bzip2 -1  < sample1.ref > sample1.rb2
-	./$O.bzip2 -2  < sample2.ref > sample2.rb2
-	./$O.bzip2 -3  < sample3.ref > sample3.rb2
-	./$O.bunzip2  < sample1.bz2 > sample1.tst
-	./$O.bunzip2  < sample2.bz2 > sample2.tst
-	./$O.bunzip2 < sample3.bz2 > sample3.tst
-	cmp sample1.bz2 sample1.rb2 
-	cmp sample2.bz2 sample2.rb2
-	cmp sample3.bz2 sample3.rb2
-	cmp sample1.tst sample1.ref
-	cmp sample2.tst sample2.ref
-	cmp sample3.tst sample3.ref
-
 bzip2recover.$O: bzip2recover.c
 	pcc -D_POSIX_SOURCE -D_BSD_EXTENSION -c bzip2recover.c
 
diff --git a/sys/src/cmd/cwfs/mkfile b/sys/src/cmd/cwfs/mkfile
index 47b001ae7..670a2ff2d 100644
--- a/sys/src/cmd/cwfs/mkfile
+++ b/sys/src/cmd/cwfs/mkfile
@@ -13,3 +13,6 @@ cwfs64x.%:V:
 	cd cwfs64x && mk $stem
 
 cleanall:V: clean emelie.clean fs64.clean cwfs64.clean cwfs64x.clean
+
+test:VQ:
+	# nothing
diff --git a/sys/src/cmd/git/add b/sys/src/cmd/git/add
old mode 100644
new mode 100755
diff --git a/sys/src/cmd/git/commit b/sys/src/cmd/git/commit
old mode 100644
new mode 100755
diff --git a/sys/src/cmd/git/compat b/sys/src/cmd/git/compat
old mode 100644
new mode 100755
diff --git a/sys/src/cmd/git/diff b/sys/src/cmd/git/diff
old mode 100644
new mode 100755
diff --git a/sys/src/cmd/git/import b/sys/src/cmd/git/import
old mode 100644
new mode 100755
diff --git a/sys/src/cmd/git/rebase b/sys/src/cmd/git/rebase
old mode 100644
new mode 100755
diff --git a/sys/src/cmd/git/revert b/sys/src/cmd/git/revert
old mode 100644
new mode 100755
diff --git a/sys/src/cmd/git/test/add.expected b/sys/src/cmd/git/test/add.expected
new file mode 100644
index 000000000..1b9476225
--- /dev/null
+++ b/sys/src/cmd/git/test/add.expected
@@ -0,0 +1,9 @@
+A a
+A b
+A dir/a
+A dir/b
+A extra/a
+A extra/b
+A more/a
+A more/b
+A more/c
diff --git a/sys/src/cmd/git/test/add.rc b/sys/src/cmd/git/test/add.rc
new file mode 100755
index 000000000..98c00764c
--- /dev/null
+++ b/sys/src/cmd/git/test/add.rc
@@ -0,0 +1,34 @@
+#!/bin/rc
+
+. util.rc
+
+rm -fr scratch
+mkdir -p scratch/repo
+
+echo @@ abs paths @@
+@{
+	rfork ne
+	cd scratch/repo
+	pwd=`{pwd}
+	$G/init
+	mkdir dir
+	mkdir another
+	mkdir more
+	mkdir extra
+	touch a b c
+	touch dir/^(a b c)
+	touch another/^(a b c)
+	touch more/^(a b c)
+	touch extra/^(a b c)
+	$G/add a
+	$G/add $pwd/b
+	$G/add dir/a
+	$G/add $pwd/dir/b
+	$G/add more
+	@{cd more && $G/add ../extra/a}
+	@{cd more && $G/add $pwd/extra/b}
+	$G/$O.fs
+	$G/$O.walk > ../added
+}
+
+diff -c scratch/added add.expected >/dev/null || die wrong files
diff --git a/sys/src/cmd/git/test/basic.rc b/sys/src/cmd/git/test/basic.rc
new file mode 100755
index 000000000..875a225cc
--- /dev/null
+++ b/sys/src/cmd/git/test/basic.rc
@@ -0,0 +1,67 @@
+#!/bin/rc
+
+. util.rc
+
+wrkdir=`{pwd}
+rm -fr scratch
+mkdir -p scratch/upstream
+
+echo @@ version1 @@
+@{
+	cd scratch/upstream
+	q $G/init
+	echo version1 > file.txt
+	q $G/add file.txt
+	q $G/commit -m version1 file.txt
+}
+
+@{
+	cd scratch
+	$G/clone $wrkdir/scratch/upstream downstream
+}
+
+diff -c scratch/upstream/file.txt scratch/downstream/file.txt || die mismatch
+
+echo @@ version2 @@
+@{
+	cd scratch/upstream
+	echo version2 > file.txt
+	q $G/commit -m version2 file.txt
+}
+@{
+	cd scratch/downstream
+	q $G/pull
+}
+q diff -c scratch/upstream/file.txt scratch/downstream/file.txt || die mismatch
+
+echo @@ version3 @@
+@{
+	cd scratch/upstream
+	echo version3 > file2.txt
+	$G/add file2.txt
+	q $G/commit -m version3 file2.txt
+}
+@{
+	cd scratch/downstream
+	q $G/pull
+}
+q diff -c scratch/upstream/file.txt scratch/downstream/file.txt || die mismatch
+q diff -c scratch/upstream/file2.txt scratch/downstream/file2.txt || die mismatch
+
+echo @@ version4 @@
+@{
+	cd scratch/upstream
+	echo version4 > file.txt
+	$G/rm file2.txt
+	rm file2.txt
+	q $G/commit -m version4 file.txt file2.txt
+}
+
+@{
+	cd scratch/downstream
+	q $G/pull
+}
+q diff -c scratch/upstream/file.txt scratch/downstream/file.txt || die mismatch
+! test -e scratch/upstream/file2.txt || die mismatch
+! test -e scratch/downstream/file2.txt || die mismatch
+
diff --git a/sys/src/cmd/git/test/export.rc b/sys/src/cmd/git/test/export.rc
new file mode 100755
index 000000000..ecd13df76
--- /dev/null
+++ b/sys/src/cmd/git/test/export.rc
@@ -0,0 +1,40 @@
+#!/bin/rc
+
+. util.rc
+
+rm -fr scratch
+mkdir -p scratch
+cd scratch
+
+# setup test repo
+@{
+	rfork ne
+	q $G/init a
+
+	cd a
+	echo hello > a
+	echo goodbye > b
+	q $G/add a b
+	q $G/commit -m v1 .
+	cd ..
+	pwd
+	q $G/clone `{pwd}^/a b
+}
+
+echo @@ export and apply @@
+@{
+	rfork ne
+	@{
+		cd b
+		echo hihi > b
+		q $G/commit -m export1 b
+		$G/export > ../export1.patch
+	}
+
+	@{
+		cd a
+		q $G/import ../export1.patch
+	}
+}
+
+~ `{cd a && $G/$O.query HEAD} `{cd b && $G/$O.query HEAD} || die 'mismatched export'
diff --git a/sys/src/cmd/git/test/lca.rc b/sys/src/cmd/git/test/lca.rc
new file mode 100755
index 000000000..7ca1da741
--- /dev/null
+++ b/sys/src/cmd/git/test/lca.rc
@@ -0,0 +1,68 @@
+#!/bin/rc
+
+. util.rc
+
+rm -fr scratch
+mkdir -p scratch
+cd scratch
+
+echo @@ test lca @@
+@{
+	q $G/init a
+
+	cd a
+
+	echo 'first' > f
+	q $G/add f
+	q $G/commit -m base f
+	r=`{$G/$O.query HEAD}
+
+	echo 0 > f
+	q $G/commit -m a.0 .
+	a=`{$G/$O.query HEAD}
+
+	for(i in `{seq 10}){
+		echo $i > f
+		q $G/commit -m a.$i .
+	}
+
+	q $G/branch -nb $r merge
+	echo x > f
+	q $G/commit -m b.0 .
+	b=`{$G/$O.query HEAD}
+
+	qq $G/merge front
+	q $G/commit -m merge .
+	m=`{$G/$O.query HEAD}
+
+~ `{$G/$O.query $a $m @} $a || die lca a-m
+~ `{$G/$O.query $a $b @} $r || die lca a-b
+~ `{$G/$O.query $a $r @} $r || die lca a-r
+}
+
+#       a
+#       ↓
+# b→c→d→e→f
+#
+# date order (oldest to newest): f d c b e a
+echo @@ test lca rebase @@
+@{
+	q $G/init b
+	cd b
+
+	touch f
+
+	fn commit {
+		$G/$O.save -n regress -e regress $* f
+	}
+
+	f=`{commit -m f -d 1}
+	e=`{commit -m e -d 5 -p $f}
+	d=`{commit -m d -d 2 -p $e}
+	c=`{commit -m c -d 3 -p $d}
+	b=`{commit -m b -d 4 -p $c}
+	a=`{commit -m a -d 6 -p $e}
+
+~ `{$G/$O.query $a $b @} $e || die lca a-b
+~ `{$G/$O.query $b $a @} $e || die lca b-a
+}
diff --git a/sys/src/cmd/git/test/merge.rc b/sys/src/cmd/git/test/merge.rc
new file mode 100755
index 000000000..47438f4ad
--- /dev/null
+++ b/sys/src/cmd/git/test/merge.rc
@@ -0,0 +1,92 @@
+#!/bin/rc
+
+. util.rc
+
+rm -fr scratch
+mkdir -p scratch
+cd scratch
+c='foo
+bar
+baz
+'
+
+# setup test repo
+@{
+	rfork ne
+	q $G/init a
+
+	cd a
+	echo hello > a
+	echo goodbye > b
+	echo -n $c > c
+	chmod +x a
+	q $G/add a b c
+	q $G/commit -m v1 .
+	cd ..
+	pwd
+	q $G/clone `{pwd}^/a b
+}
+
+echo @@ merge different files @@
+@{
+	rfork ne
+	@{
+		cd a
+		echo x > a
+		q $G/commit -m diverge1a a
+	}
+	@{
+		cd b
+		echo y > b
+		q $G/commit -m diverge1b b
+	}
+
+	@{
+		cd b
+		qq $G/pull
+		$G/merge origin/front || status=''
+		q $G/commit -m merged .
+	}
+}
+
+flag +x
+~ `{cat b/a} x || die merge 1.a
+~ `{cat b/b} y || die merge 1.b
+~ `''{cat b/c} $c || die merge 1.c
+test -x b/a || die merge preserve exec
+! test -x b/b || die merge preserve nonexec b
+! test -x b/c || die merge preserve nonexec c
+
+echo @@ merge concurent edits @@
+@{
+	rfork ne
+	@{
+		cd a
+		chmod -x a
+		chmod +x b
+		echo quux >>c
+		q $G/commit -m diverge2a a b c
+	}
+	@{
+		cd b
+		sed s/foo/FOO/ <c >c.new
+		mv c.new c
+		q $G/commit -m diverge2b c
+
+		qq $G/pull
+		qq $G/merge origin/front
+		q $G/commit -m merge c
+	}
+}
+
+c='FOO
+bar
+baz
+quux
+'
+~ `{cat b/a} x || die	# commit from a
+~ `{cat b/b} y || die # commit from b
+~ `''{cat b/c} $c || {diff -u b/c <{echo $c}; die merge 1.c}
+! test -x b/a || die merge remove exec
+test -x b/b || die merge add exec
+! test -x b/c || die merge preserve nonexec c
diff --git a/sys/src/cmd/git/test/mkfile b/sys/src/cmd/git/test/mkfile
new file mode 100644
index 000000000..88df62585
--- /dev/null
+++ b/sys/src/cmd/git/test/mkfile
@@ -0,0 +1,11 @@
+</$objtype/mkfile
+
+TEST=\
+	add\
+	basic\
+	export\
+	lca\
+	merge\
+	range
+
+</sys/src/cmd/mktest
diff --git a/sys/src/cmd/git/test/range.rc b/sys/src/cmd/git/test/range.rc
new file mode 100755
index 000000000..6dbb47419
--- /dev/null
+++ b/sys/src/cmd/git/test/range.rc
@@ -0,0 +1,75 @@
+#!/bin/rc
+
+. util.rc
+
+rm -fr scratch
+mkdir -p scratch
+cd scratch
+
+fn commit {
+	$G/$O.save -n regress -e regress $* f
+}
+
+# h→g→f
+# ↓   ↓
+# e→d→c→b→a
+echo @@ test range @@
+@{
+	q $G/init a
+	cd a
+	touch f
+
+	a=`{commit -m a}
+	b=`{commit -m b -p $a}
+	c=`{commit -m c -p $b}
+	d=`{commit -m d -p $c}
+	e=`{commit -m e -p $d}
+	f=`{commit -m f -p $c}
+	g=`{commit -m g -p $f}
+	h=`{commit -m h -p $e -p $g}
+	map='
+		s/^'$a'$/a/
+		s/^'$b'$/b/
+		s/^'$c'$/c/
+		s/^'$d'$/d/
+		s/^'$e'$/e/
+		s/^'$f'$/f/
+		s/^'$g'$/g/
+		s/^'$h'$/h/
+	'
+
+	diff -u <{echo d; echo e; echo g; echo h} \
+		<{$G/$O.query $f..$h | sed -e $map} || die range
+}
+
+#       b
+#      ↙ ↖
+# f←e←d   a
+#      ↖ ↙
+#       c
+echo @@ test range 2 @@
+@{
+	q $G/init b
+	cd b
+	touch f
+
+	a=`{commit -m a}
+	b=`{commit -m b -p $a}
+	c=`{commit -m c -p $a}
+	d=`{commit -m d -p $b -p $c}
+	e=`{commit -m e -p $d}
+	f=`{commit -m f -p $e}
+	map='
+		s/^'$a'$/a/
+		s/^'$b'$/b/
+		s/^'$c'$/c/
+		s/^'$d'$/d/
+		s/^'$e'$/e/
+		s/^'$f'$/f/
+	'
+
+	diff -u <{echo c; echo d; echo e; echo f} \
+		<{$G/$O.query $b..$f | sed -e $map} || die range
+	diff -u <{echo b; echo d; echo e; echo f} \
+		<{$G/$O.query $c..$f | sed -e $map} || die range
+}
diff --git a/sys/src/cmd/git/test/util.rc b/sys/src/cmd/git/test/util.rc
new file mode 100755
index 000000000..66bfacb71
--- /dev/null
+++ b/sys/src/cmd/git/test/util.rc
@@ -0,0 +1,17 @@
+fn q {
+	{$* > /tmp/out.$pid && rm /tmp/out.$pid} || cat /tmp/out
+}
+fn qq {
+	$* >/dev/null >[2]/dev/null
+}
+
+fn die {
+	st=$status
+	if(! ~ $st ''){
+		*=($* : $st)
+		echo $"*
+		exit $"*
+	}
+}
+
+G=`{cleanname `{pwd}^/..}
diff --git a/sys/src/cmd/ktrans/mkfile b/sys/src/cmd/ktrans/mkfile
index 1c0973630..9d2555e28 100644
--- a/sys/src/cmd/ktrans/mkfile
+++ b/sys/src/cmd/ktrans/mkfile
@@ -11,6 +11,3 @@ OFILES=\
 
 $O.test: test.$O
 	$LD $LDFLAGS -o $target $prereq
-
-test:V: $O.test $O.out
-	$O.test $O.out
diff --git a/sys/src/cmd/mkfile b/sys/src/cmd/mkfile
index 383f92653..e7e71e276 100644
--- a/sys/src/cmd/mkfile
+++ b/sys/src/cmd/mkfile
@@ -72,3 +72,6 @@ clean:V: cleancmds clean.dirs
 
 nuke:V: cleancmds nuke.dirs
 	rm -f *.acid
+
+test:VQ: test.dirs
+	@{cd test && mk $MKFLAGS test}
diff --git a/sys/src/cmd/mklib b/sys/src/cmd/mklib
index 3ffbef80b..c5fb3a127 100644
--- a/sys/src/cmd/mklib
+++ b/sys/src/cmd/mklib
@@ -46,3 +46,9 @@ clean:V:
 
 update:V:
 	update $UPDATEFLAGS $UPDATE
+
+test:VQ: $LIB
+	if(test -d ./test)
+		cd test && mk $MKFLAGS test
+	if not
+		status=()
diff --git a/sys/src/cmd/mkmany b/sys/src/cmd/mkmany
index 094e92134..945816880 100644
--- a/sys/src/cmd/mkmany
+++ b/sys/src/cmd/mkmany
@@ -79,3 +79,10 @@ clean:V:
 	cp $stem.man $MAN/$stem
 
 man:V:	$MANFILES
+
+test:VQ: $PROGS
+	if(test -d ./test)
+		cd test && mk $MKFLAGS test
+	if not
+		status=()
+
diff --git a/sys/src/cmd/mkone b/sys/src/cmd/mkone
index ad0c97901..7e43ec480 100644
--- a/sys/src/cmd/mkone
+++ b/sys/src/cmd/mkone
@@ -60,3 +60,12 @@ $MAN/%:    %.man
 	cp $prereq $target
 
 man:V:    $MAN/$TARG
+
+test:QV: $O.out $TESTDEP
+	if(test -d ./test){
+		pwd
+		@{cd ./test && mk $MKFLAGS test}
+	}
+	if not
+		status=()
+
diff --git a/sys/src/cmd/mksyslib b/sys/src/cmd/mksyslib
index 9457a8417..e4fd720bb 100644
--- a/sys/src/cmd/mksyslib
+++ b/sys/src/cmd/mksyslib
@@ -41,3 +41,9 @@ nuke:V:
 
 update:V:
 	update $UPDATEFLAGS $UPDATE
+
+test:VQ:
+	if(test -d ./test)
+		cd test && mk $MKFLAGS test
+	if not
+		status=()
diff --git a/sys/src/cmd/mktest b/sys/src/cmd/mktest
new file mode 100644
index 000000000..438555132
--- /dev/null
+++ b/sys/src/cmd/mktest
@@ -0,0 +1,41 @@
+test:VQ:
+	echo $t
+	for(t in $TEST) @{
+		if(test -d $t)
+			@{cd $t && mk $MKFLAGS test}
+		if not
+			mk $t.test
+	}
+
+all:VQ:
+	# nothing
+
+%.test:V: $O.%
+	./$O.$stem
+
+%.test:V: %.rc
+	./$stem.rc
+
+%.$O:	$HFILES		# don't combine with following %.$O rules
+
+%.$O:	%.c
+	$CC $CFLAGS $stem.c
+
+%.$O:	%.s
+	$AS $AFLAGS $stem.s
+
+$O.%:V:	%.$O $OFILES $LIB
+	$LD $LDFLAGS -o $target $prereq
+
+# [$OS].??* avoids file names like 9.h
+nuke:V:
+	rm -f *.[$OS] y.tab.? lex.yy.c y.debug y.output [$OS].??* *.acid $TARG $CLEANFILES
+
+clean:V:
+	for(t in $TEST)
+		if(test -d $t)
+			@{cd $t && mk $MKFLAGS clean}
+	rm -f *.[$OS] *.a[$OS] y.tab.? lex.yy.c y.debug y.output [$OS].??* $TARG $CLEANFILES
+
+%.clean:V:
+	rm -f $stem.[$OS] [$OS].$stem $stem.acid $stem
diff --git a/sys/src/cmd/nusb/mkfile b/sys/src/cmd/nusb/mkfile
index 017a19afc..53672f99c 100644
--- a/sys/src/cmd/nusb/mkfile
+++ b/sys/src/cmd/nusb/mkfile
@@ -36,3 +36,8 @@ update:V:
 		echo update $i
 		cd $i && mk 'UPDATEFLAGS='$"UPDATEFLAGS update
 	}
+
+test:
+	for(d in $DIRS) @{
+		cd $d && mk $MKFLAGS test
+	}
diff --git a/sys/src/cmd/postscript/mkfile b/sys/src/cmd/postscript/mkfile
index 7b9f4b3c0..a5c2f6cf9 100644
--- a/sys/src/cmd/postscript/mkfile
+++ b/sys/src/cmd/postscript/mkfile
@@ -48,3 +48,6 @@ $TARGETS:V:
 		cd $i;
 		mk $target
 	}
+
+test:VQ:
+	# nothing
diff --git a/sys/src/cmd/spell/mkfile b/sys/src/cmd/spell/mkfile
index 013a82eda..05eab7047 100644
--- a/sys/src/cmd/spell/mkfile
+++ b/sys/src/cmd/spell/mkfile
@@ -39,8 +39,3 @@ nuke:V:
 
 clean:V:
 	rm -f *.[$OS] [$OS].out [$OS].pcode y.tab.? y.debug y.output $TARG
-
-test:V:	$O.out brspell
-	time ./$O.out -b -f brspell </dev/null >y
-	time ./$O.out -b -f brspell <x >z
-	cmp y z
diff --git a/sys/src/cmd/test/date.rc b/sys/src/cmd/test/date.rc
new file mode 100755
index 000000000..5499e3f2b
--- /dev/null
+++ b/sys/src/cmd/test/date.rc
@@ -0,0 +1,91 @@
+#!/bin/rc
+
+rfork en
+cat /adm/timezone/GMT > /env/timezone
+
+nl='
+'
+
+fn check {
+	r=`$nl{../$O.seconds $1}
+	if(! ~ $r $2){
+		echo "$"r"
+		echo "$"2"
+		echo $status
+		>[1=2] echo fail: $1: got $r expected $2
+		exit 'fail'
+	}
+}
+
+# examples from manpage, and shuffles
+rfork ne
+check '23 may 2011' 			1306108800
+check 'may 23 2011' 			1306108800
+check 'may 2011 23' 			1306108800
+check '23 2011 may' 			1306108800
+check '2011 may 23'			1306108800
+check '2011 23 may'			1306108800
+
+# now with timezones
+check '23 may 2011 edt'			1306123200
+check '23 may 2011 gmt'			1306108800
+
+# If the tz is present, the results should stay
+# the same if we change zones.
+@{
+	rfork en
+	cat /adm/timezone/US_Pacific >/env/timezone
+	check '23 may 2011 edt'			1306123200
+	check '23 may 2011 gmt'			1306108800
+}
+
+# now with all variations on times.
+check 'may 23 2011 0'			1306108800
+check 'may 23 2011 0:1'			1306108860
+check 'may 23 2011 0:1:2'		1306108862
+
+# now with times and timezones
+check '23 may 2011 edt'			1306123200
+check '23 may 2011 gmt'			1306108800
+
+# formats from ../$O.date(1)
+check 'Sun, 14 Jun 2020 22:08:48 -0700'	1592197728
+check 'Sun, 14 Jun 2020 -0700'		1592118000
+check '2020-06-14'			1592092800
+check '2020-06-14T22:14:17-07:00'	1592198057
+
+# colloquial american format (eww)
+check '06/14/2020'			1592092800
+check '06/01/2020'			1590969600
+
+
+# Arizona has no DST
+@{
+	rfork en
+	cat /adm/timezone/US_Arizona >/env/timezone
+	check 'Mon, Jun 21 17:38:02 MST 2020' 1592786282
+}
+
+# CET is a timezone with no hard-coded
+# timezone name -- it should round trip
+@{
+	rfork en
+	cat /adm/timezone/CET >/env/timezone
+	tm=1592782682
+	ds=`{../$O.date $tm}
+	r=`{../$O.seconds $"ds}
+	if(! ~ $tm $r)
+		>[1=2] echo fail: CET: got $r expected $tm
+}
+
+# The other EST should also round trip.
+@{
+	rfork en
+	cat /adm/timezone/Australia_ACT >/env/timezone
+	tm=1592782682
+	ds=`$nl{../$O.date $tm}
+	r=`$nl{../$O.seconds $ds}
+	if(! ~ $tm $r)
+		>[1=2] echo fail: Austraila_ACT: got $r expected $tm
+}
+exit ''
diff --git a/sys/src/cmd/test/mkfile b/sys/src/cmd/test/mkfile
new file mode 100644
index 000000000..17719e706
--- /dev/null
+++ b/sys/src/cmd/test/mkfile
@@ -0,0 +1,9 @@
+</$objtype/mkfile
+
+TEST=\
+	date\
+	patch\
+	ramfs\
+	test\
+
+</sys/src/cmd/mktest
diff --git a/sys/src/cmd/test/patch/basic.expected b/sys/src/cmd/test/patch/basic.expected
new file mode 100644
index 000000000..190423f88
--- /dev/null
+++ b/sys/src/cmd/test/patch/basic.expected
@@ -0,0 +1,100 @@
+1
+2
+3
+4
+5
+6
+7
+8
+9
+10
+11
+12
+13
+14
+15
+16
+17
+18
+19
+20
+21
+22
+23
+24
+25
+26
+27
+28
+29
+30
+31
+32
+33
+34
+35
+36
+37
+38
+39
+40
+41
+42
+43
+44
+45
+46
+47
+48
+49
+50
+51
+52
+53
+54
+55
+56
+57
+58
+59
+60
+61
+62
+63
+64
+65
+66
+67
+68
+69
+70
+71
+72
+73
+74
+75
+76
+77
+78
+79
+80
+81
+82
+83
+84
+85
+86
+87
+88
+89
+90
+91
+92
+93
+94
+95
+96
+97
+98
+99
+100
diff --git a/sys/src/cmd/test/patch/basic.in b/sys/src/cmd/test/patch/basic.in
new file mode 100644
index 000000000..1f5a7255c
--- /dev/null
+++ b/sys/src/cmd/test/patch/basic.in
@@ -0,0 +1,93 @@
+3
+4
+5
+6
+7
+8
+9
+10
+11
+12
+13
+14
+13
+12
+17
+18
+19
+20
+21
+22
+23
+24
+25
+26
+27
+28
+29
+30
+31
+32
+33
+34
+35
+36
+37
+38
+39
+42
+43
+44
+45
+46
+47
+48
+49
+50
+51
+52
+53
+54
+55
+56
+57
+58
+59
+60
+61
+62
+63
+64
+65
+66
+67
+68
+69
+70
+71
+72
+73
+74
+75
+76
+77
+78
+79
+80
+81
+82
+83
+84
+85
+86
+88
+89
+90
+91
+92
+93
+94
+95
+96
+97
+98
diff --git a/sys/src/cmd/test/patch/basic.patch b/sys/src/cmd/test/patch/basic.patch
new file mode 100644
index 000000000..326d4cfd0
--- /dev/null
+++ b/sys/src/cmd/test/patch/basic.patch
@@ -0,0 +1,42 @@
+--- basic.in
++++ basic.out
+@@ -1,3 +1,5 @@
++1
++2
+ 3
+ 4
+ 5
+@@ -10,8 +12,8 @@
+ 12
+ 13
+ 14
+-13
+-12
++15
++16
+ 17
+ 18
+ 19
+@@ -35,6 +37,8 @@
+ 37
+ 38
+ 39
++40
++41
+ 42
+ 43
+ 44
+@@ -80,6 +84,7 @@
+ 84
+ 85
+ 86
++87
+ 88
+ 89
+ 90
+@@ -91,3 +96,5 @@
+ 96
+ 97
+ 98
++99
++100
diff --git a/sys/src/cmd/test/patch/create.expected b/sys/src/cmd/test/patch/create.expected
new file mode 100644
index 000000000..08fe19ca4
--- /dev/null
+++ b/sys/src/cmd/test/patch/create.expected
@@ -0,0 +1,12 @@
+1
+2
+3
+4
+5
+6
+7
+8
+9
+10
+11
+12
diff --git a/sys/src/cmd/test/patch/create.patch b/sys/src/cmd/test/patch/create.patch
new file mode 100644
index 000000000..021c9d7f3
--- /dev/null
+++ b/sys/src/cmd/test/patch/create.patch
@@ -0,0 +1,15 @@
+--- /dev/null
++++ create.out
+@@ -1,0 +1,12 @@
++1
++2
++3
++4
++5
++6
++7
++8
++9
++10
++11
++12
diff --git a/sys/src/cmd/test/patch/delete.expected b/sys/src/cmd/test/patch/delete.expected
new file mode 100644
index 000000000..f00c965d8
--- /dev/null
+++ b/sys/src/cmd/test/patch/delete.expected
@@ -0,0 +1,10 @@
+1
+2
+3
+4
+5
+6
+7
+8
+9
+10
diff --git a/sys/src/cmd/test/patch/delete.patch b/sys/src/cmd/test/patch/delete.patch
new file mode 100644
index 000000000..2b6c1b5aa
--- /dev/null
+++ b/sys/src/cmd/test/patch/delete.patch
@@ -0,0 +1,15 @@
+--- delete.out
++++ /dev/null
+@@ -1,12 +1,0 @@
+-1
+-2
+-3
+-4
+-5
+-6
+-7
+-8
+-9
+-10
+-11
+-12
diff --git a/sys/src/cmd/test/patch/header.expected b/sys/src/cmd/test/patch/header.expected
new file mode 100644
index 000000000..190423f88
--- /dev/null
+++ b/sys/src/cmd/test/patch/header.expected
@@ -0,0 +1,100 @@
+1
+2
+3
+4
+5
+6
+7
+8
+9
+10
+11
+12
+13
+14
+15
+16
+17
+18
+19
+20
+21
+22
+23
+24
+25
+26
+27
+28
+29
+30
+31
+32
+33
+34
+35
+36
+37
+38
+39
+40
+41
+42
+43
+44
+45
+46
+47
+48
+49
+50
+51
+52
+53
+54
+55
+56
+57
+58
+59
+60
+61
+62
+63
+64
+65
+66
+67
+68
+69
+70
+71
+72
+73
+74
+75
+76
+77
+78
+79
+80
+81
+82
+83
+84
+85
+86
+87
+88
+89
+90
+91
+92
+93
+94
+95
+96
+97
+98
+99
+100
diff --git a/sys/src/cmd/test/patch/header.in b/sys/src/cmd/test/patch/header.in
new file mode 100644
index 000000000..1f5a7255c
--- /dev/null
+++ b/sys/src/cmd/test/patch/header.in
@@ -0,0 +1,93 @@
+3
+4
+5
+6
+7
+8
+9
+10
+11
+12
+13
+14
+13
+12
+17
+18
+19
+20
+21
+22
+23
+24
+25
+26
+27
+28
+29
+30
+31
+32
+33
+34
+35
+36
+37
+38
+39
+42
+43
+44
+45
+46
+47
+48
+49
+50
+51
+52
+53
+54
+55
+56
+57
+58
+59
+60
+61
+62
+63
+64
+65
+66
+67
+68
+69
+70
+71
+72
+73
+74
+75
+76
+77
+78
+79
+80
+81
+82
+83
+84
+85
+86
+88
+89
+90
+91
+92
+93
+94
+95
+96
+97
+98
diff --git a/sys/src/cmd/test/patch/header.patch b/sys/src/cmd/test/patch/header.patch
new file mode 100644
index 000000000..b8ac887aa
--- /dev/null
+++ b/sys/src/cmd/test/patch/header.patch
@@ -0,0 +1,54 @@
+diff should handle headers just fine, so
+this file contains a few lines of header
+and footer, with a couple of false starts,
+consisting of lines starting with
+--- some words
+but no immediately following 
++++ words
+lines
+
+--- header.in
++++ header.out
+@@ -1,3 +1,5 @@
++1
++2
+ 3
+ 4
+ 5
+@@ -10,8 +12,8 @@
+ 12
+ 13
+ 14
+-13
+-12
++15
++16
+ 17
+ 18
+ 19
+@@ -35,6 +37,8 @@
+ 37
+ 38
+ 39
++40
++41
+ 42
+ 43
+ 44
+@@ -80,6 +84,7 @@
+ 84
+ 85
+ 86
++87
+ 88
+ 89
+ 90
+@@ -91,3 +96,5 @@
+ 96
+ 97
+ 98
++99
++100
+-- signature footer: should not get picked up
+and here is the footer that should
+also be ignored.
diff --git a/sys/src/cmd/test/patch/mkfile b/sys/src/cmd/test/patch/mkfile
new file mode 100644
index 000000000..959f8becb
--- /dev/null
+++ b/sys/src/cmd/test/patch/mkfile
@@ -0,0 +1,5 @@
+</$objtype/mkfile
+
+TEST=patch
+
+</sys/src/cmd/mktest
diff --git a/sys/src/cmd/test/patch/multifile.patch b/sys/src/cmd/test/patch/multifile.patch
new file mode 100644
index 000000000..15abb859c
--- /dev/null
+++ b/sys/src/cmd/test/patch/multifile.patch
@@ -0,0 +1,89 @@
+--- multifile2.in
++++ multifile2.out
+@@ -1,21 +1,19 @@
+-77777
+ 77778
+ 77779
+ 77780
+ 77781
+ 77782
+-77783
+-77784
+-77785
+-77786
+-77787
+-77788
+ 77789
++77788
++77787
++77786
++77785
++77784
++77783
+ 77790
+ 77791
+ 77792
+ 77793
+ 77794
+-77795
+ 77796
+ 77797
+
+of course, each patch can have its own comment
+lines mixed in, so we should handle these.
+--- multifile1.in
++++ multifile1.out
+@@ -14,16 +14,6 @@
+ 12
+ 17
+ 18
+-19
+-20
+-21
+-22
+-23
+-24
+-25
+-26
+-27
+-28
+ 29
+ 30
+ 31
+@@ -32,20 +22,6 @@
+ 34
+ 35
+ 36
+-37
+-38
+-39
+-42
+-43
+-44
+-45
+-46
+-47
+-48
+-49
+-50
+-51
+-52
+ 53
+ 54
+ 55
+@@ -73,11 +49,11 @@
+ 77
+ 78
+ 79
+-80
+-81
+-82
+-83
+ 84
++83
++82
++81
++80
+ 85
+ 86
+ 88
diff --git a/sys/src/cmd/test/patch/multifile1.expected b/sys/src/cmd/test/patch/multifile1.expected
new file mode 100644
index 000000000..36218e8fd
--- /dev/null
+++ b/sys/src/cmd/test/patch/multifile1.expected
@@ -0,0 +1,69 @@
+3
+4
+5
+6
+7
+8
+9
+10
+11
+12
+13
+14
+13
+12
+17
+18
+29
+30
+31
+32
+33
+34
+35
+36
+53
+54
+55
+56
+57
+58
+59
+60
+61
+62
+63
+64
+65
+66
+67
+68
+69
+70
+71
+72
+73
+74
+75
+76
+77
+78
+79
+84
+83
+82
+81
+80
+85
+86
+88
+89
+90
+91
+92
+93
+94
+95
+96
+97
+98
diff --git a/sys/src/cmd/test/patch/multifile1.in b/sys/src/cmd/test/patch/multifile1.in
new file mode 100644
index 000000000..1f5a7255c
--- /dev/null
+++ b/sys/src/cmd/test/patch/multifile1.in
@@ -0,0 +1,93 @@
+3
+4
+5
+6
+7
+8
+9
+10
+11
+12
+13
+14
+13
+12
+17
+18
+19
+20
+21
+22
+23
+24
+25
+26
+27
+28
+29
+30
+31
+32
+33
+34
+35
+36
+37
+38
+39
+42
+43
+44
+45
+46
+47
+48
+49
+50
+51
+52
+53
+54
+55
+56
+57
+58
+59
+60
+61
+62
+63
+64
+65
+66
+67
+68
+69
+70
+71
+72
+73
+74
+75
+76
+77
+78
+79
+80
+81
+82
+83
+84
+85
+86
+88
+89
+90
+91
+92
+93
+94
+95
+96
+97
+98
diff --git a/sys/src/cmd/test/patch/multifile2.expected b/sys/src/cmd/test/patch/multifile2.expected
new file mode 100644
index 000000000..d8c0a5bde
--- /dev/null
+++ b/sys/src/cmd/test/patch/multifile2.expected
@@ -0,0 +1,19 @@
+77778
+77779
+77780
+77781
+77782
+77789
+77788
+77787
+77786
+77785
+77784
+77783
+77790
+77791
+77792
+77793
+77794
+77796
+77797
diff --git a/sys/src/cmd/test/patch/multifile2.in b/sys/src/cmd/test/patch/multifile2.in
new file mode 100644
index 000000000..649b7dc6a
--- /dev/null
+++ b/sys/src/cmd/test/patch/multifile2.in
@@ -0,0 +1,21 @@
+77777
+77778
+77779
+77780
+77781
+77782
+77783
+77784
+77785
+77786
+77787
+77788
+77789
+77790
+77791
+77792
+77793
+77794
+77795
+77796
+77797
diff --git a/sys/src/cmd/test/patch/nop.expected b/sys/src/cmd/test/patch/nop.expected
new file mode 100644
index 000000000..f00c965d8
--- /dev/null
+++ b/sys/src/cmd/test/patch/nop.expected
@@ -0,0 +1,10 @@
+1
+2
+3
+4
+5
+6
+7
+8
+9
+10
diff --git a/sys/src/cmd/test/patch/patch.rc b/sys/src/cmd/test/patch/patch.rc
new file mode 100755
index 000000000..28c222939
--- /dev/null
+++ b/sys/src/cmd/test/patch/patch.rc
@@ -0,0 +1,39 @@
+#!/bin/rc -e
+
+fn check{
+	if(! cmp $1 $2){
+		>[2=1] echo fail: $1 $2
+		>[2=1] diff -u $1 $2
+		exit mismatch
+	}
+	status=()
+}
+
+fn checkpatch{
+	rm -f $1.out
+	../../$O.patch $1.patch
+	check $1.out $1.expected
+}
+
+checkpatch basic
+checkpatch header
+checkpatch create
+
+seq 12 > delete.out
+../../$O.patch delete.patch
+test ! -f delete.out
+
+rm -f multifile^(1 2)^.out
+chmod 640 multifile1.in
+chmod 400 multifile2.in
+../../$O.patch multifile.patch
+check multifile1.out multifile1.expected
+check multifile2.out multifile2.expected
+
+if(! ~ `{walk -ex multifile1.out} --rw-r-----)
+	exit misperm1
+if(! ~ `{walk -ex multifile2.out} --rw-------)
+	exit misperm2
+
+
+status=()
diff --git a/sys/src/cmd/test/ramfs.rc b/sys/src/cmd/test/ramfs.rc
new file mode 100755
index 000000000..9ec516ce2
--- /dev/null
+++ b/sys/src/cmd/test/ramfs.rc
@@ -0,0 +1,40 @@
+#!/bin/rc
+rfork e
+
+attach='
+Tversion 8192 9P2000
+Rversion 8192 9P2000
+Tattach 1 -1 '^$user^' ''''
+Rattach {0,0,d}
+Twalk 1 2
+Rwalk
+'
+
+fn assert{
+	aux/9pcon -ac '../6.ramfs -i' >/dev/null || exit $status
+}
+
+
+# attach
+assert <<.
+$attach
+.
+
+# create/write/read
+assert <<.
+$attach
+Tcreate 2 testfile 777 2
+Rcreate {1,0,0} 0
+Twrite 2 0 hello
+Rwrite 5
+Tclunk 2
+Rclunk
+Twalk 1 2 testfile
+Rwalk {1,2,0}
+Topen 2 0
+Ropen {1,2,0} 0
+Tread 2 0 5
+Rread hello
+Tclunk 2
+Rclunk
+.
diff --git a/sys/src/cmd/test/test.rc b/sys/src/cmd/test/test.rc
new file mode 100755
index 000000000..633581d56
--- /dev/null
+++ b/sys/src/cmd/test/test.rc
@@ -0,0 +1,135 @@
+#!/bin/rc
+
+rfork e
+
+ERROR=0
+FAILED=0
+
+fn t{
+	# $1 -> exit code
+	# $2 -> $test expression
+
+	expect=$1
+	shift
+
+	# check for syntax errors
+	syntax=`{../$O.test $* >[2=1]}
+	if(~ $"syntax ''){
+		switch($expect){
+		case 0
+			if(! ../$O.test $*) failed $expect $*
+		case 1
+			if(../$O.test $*) failed $expect $*
+		}
+	}
+	if not
+		error
+}
+
+fn error{
+	echo
+	echo '	'^$"syntax
+	ERROR=`{echo $ERROR 1 + p | dc}
+}
+
+fn failed{
+	echo -n $1^': test' $*(2-)^'^:	failed'
+	echo '	failed'
+	FAILED=`{echo $FAILED 1 + p | dc}
+}
+
+
+t 0 b '=' b
+t 1 b '!=' b
+t 0 '(' b '=' b ')'
+t 1 ! '(' b '=' b ')'
+t 1 ! -f /bin/rc
+
+t 0 -h '=' -h
+t 0 -o '=' -o
+#t 1 -f '=' h
+t 1 -h '=' f
+t 1 -o '=' f
+t 1 f '=' -o
+
+t 0 '(' -h '=' -h ')'
+t 1 '(' a '=' -h ')'
+#t 1 '(' -f '=' h ')'
+t 0 -h '=' -h -o a
+t 0 '(' -h '=' -h ')' -o 1
+t 0 -h '=' -h -o -h '=' -h
+t 0 '(' -h '=' -h ')' -o '(' -h '=' -h ')'
+t 0 roedelheim '=' roedelheim
+t 1 potsdam '=' berlin-dahlem
+
+t 0 -d /
+t 0 -d / -a a '!=' b
+t 1 -z -z
+t 0 -n -n
+
+t 0 0
+t 0 '(' 0 ')'
+t 0 '-E'
+t 0 -X -a -X
+t 0 -XXX
+t 0 '(' -E ')'
+t 0 true -o X
+t 0 true -o -X
+t 0 '(' '(' '(' a '=' a ')' -o 1 ')' -a 1 ')'
+#t 1 -h /
+t 0 -r /
+t 1 -w /dev/zero
+t 0 -w /dev/null
+t 1 -x /dev/null
+t 0 -x /bin/rc
+#t 0 -c /dev/null
+#t 0 -b /dev/fd0a -o -b /dev/rfd0a -o true
+t 0 -f /adm/users
+t 0 -s /adm/users
+
+t 1 ! '(' 700 -le 1000 -a -n 1 -a 20 '=' 20 ')'
+t 0 100 -eq 100
+t 0 100 -lt 200
+t 1 1000 -lt 200
+t 0 1000 -gt 200
+t 0 1000 -ge 200
+t 0 1000 -ge 1000
+
+t 1 2 -ne 2
+t 0 0 -eq 0
+t 1 -5 -eq 5
+t 0 '(' 0 -eq 0 ')'
+t 1 1 -eq 0 -o a '=' a -a 1 -eq 0 -o a '=' aa
+#t 0 '" +123 " -eq 123'
+#t 1 '"-123  " -gt " -1"'
+t 0 123 -gt -123
+t 0 -0 -eq +0
+t 1 +0 -gt 0
+t 0 0 -eq 0
+t 0 0000 -eq -0
+t 0 -1 -gt -2
+t 1 1 -gt 2
+t 1 4294967296 -eq 0
+t 0 12345678901234567890 -eq +12345678901234567890
+
+t 1 '' -o ''
+t 1 '' -a ''
+t 1 a -a ''
+t 0 a -a ! ''
+t 1 ''
+t 0 ! ''
+
+t 0 1 -eq 1
+t 1 ! 1 -eq 1
+t 0 ! ! 1 -eq 1
+t 1 ! ! ! 1 -eq 1
+t 1 ! '(' XXX -o XXX ')'
+t 0 ! '(' ! '(' XXX -o XXX ')' ')'
+
+if(! ~ $ERROR 0 || ! ~ $FAILED 0){
+	echo
+	echo 'Syntax errors:' $ERROR 'Failed:' $FAILED
+}
+if(! ~ $ERROR 0 || ! ~ $FAILED 0)
+	exit 'failures'
+exit ''
diff --git a/sys/src/cmd/test/zones.rc b/sys/src/cmd/test/zones.rc
new file mode 100755
index 000000000..065399d39
--- /dev/null
+++ b/sys/src/cmd/test/zones.rc
@@ -0,0 +1,19 @@
+#!/bin/rc
+
+rfork en
+
+msg=()
+for(f in /adm/timezone/*){
+	if(! ~ $f /adm/timezone/README){
+		cat $f >/env/timezone
+		tm=`{../6.date -f'WW, DD MMM YYYY hh:mm:ss Z'}
+		x=`{../6.date -n}
+		y=`{../6.seconds $"tm}
+		if(! ~ $x $y){
+			echo $f $tm $x $y are not equal
+			msg=($msg $f)
+		}
+	}
+}
+
+exit $"msg
diff --git a/sys/src/cmd/upas/binscripts/mkfile b/sys/src/cmd/upas/binscripts/mkfile
index 68df60ab6..27aed8493 100644
--- a/sys/src/cmd/upas/binscripts/mkfile
+++ b/sys/src/cmd/upas/binscripts/mkfile
@@ -27,4 +27,7 @@ nuke:V:
 $BIN/%: %.rc
 	cp $stem.rc $BIN/$stem
 
+test:VQ:
+	# nothing
+
 <../mkupas
diff --git a/sys/src/cmd/upas/mkfile b/sys/src/cmd/upas/mkfile
index 3933b137b..9e60d4cd9 100644
--- a/sys/src/cmd/upas/mkfile
+++ b/sys/src/cmd/upas/mkfile
@@ -43,3 +43,14 @@ safeinstallall:V:
 		cd $i
 		mk safeinstallall
 	}
+
+test:V:
+	for (i in $LIBS) @{
+		cd $i
+		mk test
+	}
+	for (i in $PROGS) @{
+		cd $i
+		mk test
+	}
+
diff --git a/sys/src/cmd/vl/mkfile b/sys/src/cmd/vl/mkfile
index 96a4d7800..ca887fcea 100644
--- a/sys/src/cmd/vl/mkfile
+++ b/sys/src/cmd/vl/mkfile
@@ -28,9 +28,3 @@ compat.$O:	../cc/compat
 
 x:V:	$O.out
 	$O.out -la -o/dev/null x.v
-
-test:V:	$O.out
-	rm -f xxx
-	mv $O.out xxx
-	./xxx $OFILES
-	cmp $O.out xxx
diff --git a/sys/src/libc/mkfile b/sys/src/libc/mkfile
index 3634076f8..baabd6d85 100644
--- a/sys/src/libc/mkfile
+++ b/sys/src/libc/mkfile
@@ -49,3 +49,6 @@ everything:V:
 		mk $MKFLAGS install
 	}
 	rm -f */*.[012456789kqvxz]
+
+test:V:
+	cd test && mk $MKFLAGS test
diff --git a/sys/src/libc/test/date.c b/sys/src/libc/test/date.c
new file mode 100644
index 000000000..02c8b0fee
--- /dev/null
+++ b/sys/src/libc/test/date.c
@@ -0,0 +1,377 @@
+#include <u.h>
+#include <libc.h>
+
+int failed;
+
+/*
+ * For debugging
+ */
+void
+printtm(Tm *tm)
+{
+	fprint(2, "sec=%d min=%d hour=%d mday=%d mon=%d"
+		" year=%d day=%d yday=%d zone=%s tzoff=%d\n",
+		tm->sec, /* seconds (range 0..59) */
+		tm->min, /* minutes (0..59) */
+		tm->hour,     /* hours (0..23) */
+		tm->mday,     /* day of the month (1..31) */
+		tm->mon, /* month of the year (0..11) */
+		tm->year,     /* year A.D. - 1900 */
+		tm->wday,     /* day of week (0..6, Sunday = 0) */
+		tm->yday,     /* day of year (0..365) */
+		tm->zone,   /* time zone name */
+		tm->tzoff);    /* time   zone delta from GMT */
+}
+
+void
+fail(char *fmt, ...)
+{
+	va_list ap;
+
+	va_start(ap, fmt);
+	fprint(2, "failed: ");
+	vfprint(2, fmt, ap);
+	va_end(ap);
+	failed++;
+}
+
+void
+testtm(char *s, int year, int mon, int mday, int hour, int min, int sec, int nsec, Tm *tm){
+	if(tm->year != year-1900) fail("%s wrong year expected=%d actual=%d\n", s, year, tm->year);
+	if(tm->mon != mon)	fail("%s wrong month expected=%d actual=%d\n", s, mon, tm->mon);
+	if(tm->mday != mday)	fail("%s wrong mday expected=%d actual=%d\n", s, mday, tm->mday);
+	if(tm->hour != hour)	fail("%s wrong hour expected=%d actual=%d\n", s, hour, tm->hour);
+	if(tm->min != min)	fail("%s wrong min expected=%d actual=%d\n", s, min, tm->min);
+	if(tm->sec != sec)	fail("%s wrong sec expected=%d actual=%d\n", s, sec, tm->sec);
+	if(tm->nsec != nsec)	fail("%s wrong nsec expected=%d actual=%d\n", s, nsec, tm->nsec);
+}
+
+void
+rangechk(vlong sec, char *s, vlong val, vlong lo, vlong hi)
+{
+	if(val < lo || val > hi){
+		fprint(2, "%lld: %s: expected %lld <= %lld <= %lld", sec, s, lo, val, hi);
+		failed++;
+	}
+}
+
+void
+main(int, char **)
+{
+	Tm tm, tt;
+	Tzone *gmt, *us_arizona, *us_eastern, *us_central;
+	Tm here, there;
+	Tzone *zl, *zp;
+	char buf[128], buf1[128];
+	int i, h;
+	long s;
+
+	tmfmtinstall();
+	if((gmt = tzload("GMT")) == nil)
+		sysfatal("nil gmt: %r\n");
+	if((us_arizona = tzload("US_Arizona")) == nil)
+		sysfatal("nil us_arizona: %r\n");
+	if((us_eastern = tzload("US_Eastern")) == nil)
+		sysfatal("nil us_eastern: %r\n");
+	if((us_central = tzload("US_Central")) == nil)
+		sysfatal("get zone: %r\n");
+
+	if((zl = tzload("local")) == nil)
+	     sysfatal("load zone: %r\n");
+	if((zp = tzload("US_Pacific")) == nil)
+	     sysfatal("load zone: %r\n");
+	if(tmnow(&here, zl) == nil)
+	     sysfatal("get time: %r\n");
+	if(tmtime(&there, tmnorm(&here), zp) == nil)
+	     sysfatal("shift time: %r\n");
+
+	for(i = 0; i < 1600826575; i += 3613){
+		tmtime(&tm, i, nil);
+		rangechk(i, "nsec", tm.nsec, 0, 1e9);
+		rangechk(i, "sec", tm.sec, 0, 59);
+		rangechk(i, "min", tm.min, 0, 59);
+		rangechk(i, "hour", tm.hour, 0, 23);
+		rangechk(i, "mday", tm.mday, 1, 31);
+		rangechk(i, "mon", tm.mon, 0, 11);
+		rangechk(i, "year", tm.year, 69 ,120);
+		rangechk(i, "wday", tm.wday, 0, 6);
+		rangechk(i, "yday", tm.yday, 0, 365);
+	}
+
+	tmtime(&tm, 1586574870, gmt);
+	testtm("tmtime-gmt", 2020, 3, 11, 3, 14, 30, 0, &tm);
+	tmtime(&tm, 1586574870, us_arizona);
+	testtm("tmtime-az", 2020, 3, 10, 20, 14, 30, 0, &tm);
+
+	tmtime(&tm, 0, gmt);
+	testtm("tmtime-0-gmt", 1970, 0, 1, 0, 0, 0, 0, &tm);
+	tmnorm(&tm);
+	testtm("tmnorm-0-gmt", 1970, 0, 1, 0, 0, 0, 0, &tm);
+
+	tmtime(&tm, 84061, gmt);
+	testtm("tmtime-near0-gmt", 1970, 0, 1, 23, 21, 1, 0, &tm);
+	tmnorm(&tm);
+	testtm("tmnorm-near0-gmt", 1970, 0, 1, 23, 21, 1, 0, &tm);
+
+	tmtime(&tm, 1586574870, us_arizona);
+	testtm("tmtime-recent-az", 2020, 3, 10, 20, 14, 30, 0, &tm);
+	tmnorm(&tm);
+	testtm("tmnorm-recent-az", 2020, 3, 10, 20, 14, 30, 0, &tm);
+
+	tmtime(&tm, 1586574870, us_eastern);
+	testtm("tmtime-recent-est", 2020, 3, 10, 23, 14, 30, 0, &tm);
+	tmnorm(&tm);
+	testtm("tmnorm-recent-est", 2020, 3, 10, 23, 14, 30, 0, &tm);
+
+	if(tmparse(&tm, "hhmm", "1600", gmt, nil) == nil)
+		sysfatal("failed parse: %r\n");
+	testtm("hhmm", 1970, 0, 1, 16, 0, 0, 0, &tm);
+
+	if(tmparse(&tm, "YYYY-MM-DD hh:mm:ss Z", "1969-12-31 16:00:00 -0800", nil, nil) == nil)
+		fail("parse failed: %r\n");
+	if(tmnorm(&tm) != 0)
+		fail("wrong result: %lld != 0\n", tmnorm(&tm));
+
+	if(tmparse(&tm, "YYYY MM DD", "1990,01,03", nil, nil) == nil)
+		fail("comma parse failed");
+	if(tmnorm(&tm) != 631324800)
+		fail("wrong result");
+	if(tmparse(&tm, "YYYY MM DD", "1990 ,\t01,03", nil, nil) == nil)
+		fail("comma parse failed");
+	if(tmnorm(&tm) != 631324800)
+		fail("wrong result");
+
+	if(tmparse(&tm, "YYYY MM DD hh:mm:ss", "1969 12 31 16:00:00", gmt, nil) == nil)
+		sysfatal("failed parse: %r\n");
+	testtm("parse-notz1", 1969, 11, 31, 16, 0, 0, 0, &tm);
+
+	if(tmparse(&tm, "YYYY MM DD hh:mm:ss", "1970 01 01 04:00:00", gmt, nil) == nil)
+	fail("failed parse: %r\n");
+	testtm("parse-notz2", 1970, 0, 1, 4, 0, 0, 0, &tm);
+
+	if(tmparse(&tm, "YYYY MM DD", "1970 01 01", gmt, nil) == nil)
+	fail("failed parse: %r\n");
+	testtm("parse-notz3", 1970, 0, 1, 0, 0, 0, 0, &tm);
+
+	if(tmparse(&tm, "YYYY MMMM DD WWW hh:mm:ss", "2020 April 10 Friday 16:04:00", gmt, nil) == nil)
+		sysfatal("failed parse: %r\n");
+	testtm("parse-notz4", 2020, 3, 10, 16, 4, 0, 0, &tm);
+
+	if(tmparse(&tm, "MM DD hh:mm:ss", "12 31 16:00:00", gmt, nil) == nil)
+		sysfatal("failed parse: %r\n");
+	testtm("parse-notz5", 1970, 11, 31, 16, 0, 0, 0, &tm);
+
+	if(tmparse(&tm, "MM DD h:mm:ss", "12 31 4:00:00", gmt, nil) == nil)
+		sysfatal("failed parse: %r\n");
+	testtm("parse-mmdd-hms", 1970, 11, 31, 4, 0, 0, 0, &tm);
+	if(tm.tzoff != 0) print("%d wrong tzoff expected=%d actual=%d\n", 6, 0, tm.tzoff);
+
+	if(tmparse(&tm, "YYYY MM DD hh:mm:ss", "2020 04 10 23:14:30", us_eastern, nil) == nil)
+		fail("failed parse: %r\n");
+	testtm("parse-est", 2020, 3, 10, 23, 14, 30, 0, &tm);
+	tmtime(&tm, tmnorm(&tm), nil);
+
+	if(tmparse(&tm, "YYYY MM DD hh:mm:ss", "2020 04 10 20:14:30", us_arizona, nil) == nil)
+		fail("failed parse: %r\n");
+	testtm("parse-az", 2020, 3, 10, 20, 14, 30, 0, &tm);
+
+	if(tmparse(&tm, "YYYY MM DD hh:mm:ss ZZZ", "2020 04 10 20:14:30 EST", us_arizona, nil) == nil)
+		fail("failed parse: %r\n");
+	testtm("parse-tz1", 2020, 3, 10, 17, 14, 30, 0, &tm);
+
+	if(tmparse(&tm, "YYYY MM DD hh:mm:ss Z", "2020 04 10 20:14:30 -0400", nil, nil) == nil)
+		fail("failed parse: %r\n");
+	testtm("parse-tz2", 2020, 3, 10, 20, 14, 30, 0, &tm);
+	snprint(buf, sizeof(buf), "%τ", tmfmt(&tm, "YYYY MM DD hh:mm:ss Z"));
+	if(strcmp(buf, "2020 04 10 20:14:30 -0400") != 0)
+		fail("failed format: %s != 2020 04 10 20:14:30 -0400", buf);
+
+	if(tmparse(&tm, "YYYY MM DD hh:mm:ss.ttt", "2020 04 10 20:14:30.207", nil, nil) == nil)
+		fail("failed parse: %r\n");
+	testtm("parse-milliseconds", 2020, 3, 10, 20, 14, 30, 207*1000*1000, &tm);
+
+	if(tmparse(&tm, "YYYY MM DD hh:mm:ss.nnn", "2020 04 10 20:14:30.207", nil, nil) == nil)
+		fail("failed parse: %r\n");
+	testtm("parse-nanoseconds", 2020, 3, 10, 20, 14, 30, 207, &tm);
+
+	if(tmparse(&tm, "YYYY MM DD hh:mm:ss.nnn", "2020 04 10 20:14:30.999", nil, nil) == nil)
+		fail("failed parse: %r\n");
+	testtm("parse-nnn2", 2020, 3, 10, 20, 14, 30, 999, &tm);
+	snprint(buf, sizeof(buf), "%τ", tmfmt(&tm, "YYYY MM DD hh:mm:ss.nnn"));
+	if(strcmp(buf, "2020 04 10 20:14:30.999") != 0)
+		fail("failed format: %s != 2020 04 10 20:14:30.999", buf);
+
+	if(tmparse(&tm, "YYYY MM DD hh:mm:ss.ttt", "2020 04 10 20:14:30.999", nil, nil) == nil)
+		fail("failed parse: %r\n");
+	testtm("parse-nnn2", 2020, 3, 10, 20, 14, 30, 999*1000*1000, &tm);
+	snprint(buf, sizeof(buf), "%τ", tmfmt(&tm, "YYYY MM DD hh:mm:ss.ttt"));
+	if(strcmp(buf, "2020 04 10 20:14:30.999") != 0)
+		fail("failed format: %s != 2020 04 10 20:14:30.999", buf);
+
+	/* edge case: leap year feb 29 */
+	if(tmparse(&tm, "YYYY MM DD hh:mm:ss Z", "2020 02 29 20:14:30 -0400", nil, nil) == nil)
+		fail("failed leap year feb 29: %r\n");
+	testtm("parse-leapfeb", 2020, 1, 29, 20, 14, 30, 0, &tm);
+	if(tmparse(&tm, "YYYY MM DD hh:mm:ss Z", "2021 02 29 20:14:30 -0400", nil, nil) != nil)
+
+		fail("incorrectly accepted non-leap year feb 29\n");
+	/* stray spaces */
+	if(tmparse(&tm, "YYYY MM DD hh:mm:ss Z", "   2020 02 29 20:14:30 -0400   ", nil, nil) == nil)
+		fail("failed leap year feb 29: %r\n");
+
+	/* lots of round trips: Jan 1960 => Jun 2020, in almost-11 day increments */
+	for(i = -315619200; i < 1592179806; i += 23*3600 + 1732){
+		if(tmtime(&tm, i, nil) == nil)
+			fail("load time %d\n", i);
+		if(tmnorm(&tm) != i)
+			fail("wrong load time: %d\n", i);
+		if(snprint(buf, sizeof(buf), "%τ", tmfmt(&tm, "WW MMM DD hh:mm:ss Z YYYY")) == -1)
+			fail("format: %r\n");
+		if(tmparse(&tt, "WW MMM DD hh:mm:ss Z YYYY", buf, nil, nil) == nil)
+			fail("parse: %r\n");
+		if(tmnorm(&tm) != tmnorm(&tt))
+			fail("parse: wrong time (%lld != %lld)\n", tmnorm(&tm), tmnorm(&tt));
+	}
+
+	/* lots of round trips: Jan 1960 => Jun 2020, in almost-dailyincrements, now with timezone */
+	for(i = -315619200; i < 1592179806; i += 23*3600 + 1732){
+		if(tmtime(&tm, i, us_eastern) == nil)
+			fail("load time %d\n", i);
+		if(tmnorm(&tm) != i)
+			fail("wrong load time: %d\n", i);
+		if(snprint(buf, sizeof(buf), "%τ", tmfmt(&tm, "WW MMM DD hh:mm:ss Z YYYY")) == -1)
+			fail("format: %r\n");
+		if(tmparse(&tt, "WW MMM DD hh:mm:ss Z YYYY", buf, us_arizona, nil) == nil)
+			fail("parse: %r\n");
+		if(tmnorm(&tm) != tmnorm(&tt))
+			fail("parse: wrong time (%lld != %lld)\n", tmnorm(&tm), tmnorm(&tt));
+		tm = tt;
+		tmnorm(&tm);
+		testtm("norm-rt", tt.year + 1900, tt.mon, tt.mday, tt.hour, tt.min, tt.sec, 0, &tm);
+	}
+
+	if(tmtime(&tm, -624623143, nil) == nil)
+		fail("tmtime: %r");
+	if(snprint(buf, sizeof(buf), "%τ", tmfmt(&tm, "WW, DD MMM YYYY hh:mm:ss Z")) == -1)
+		fail("format: %r");
+	if(strcmp(buf, "Fri, 17 Mar 1950 13:34:17 +0000") != 0)
+		fail("wrong output: %s\n", buf);
+	if(tmtime(&tm, -624623143, us_eastern) == nil)
+		fail("tmtime: %r");
+	if(snprint(buf, sizeof(buf), "%τ", tmfmt(&tm, "WW, DD MMM YYYY hh:mm:ss Z")) == -1)
+		fail("format: %r");
+	if(strcmp(buf, "Fri, 17 Mar 1950 08:34:17 -0500") != 0)
+		fail("wrong output: %s\n", buf);
+
+	/* AM and PM parsing */
+	for(i = 0; i < 24; i++){
+		h = i % 12;
+		if(h == 0)
+			h = 12;
+		snprint(buf, sizeof(buf), "2021 02 01 %d:14:30 -0400", i);
+		snprint(buf1, sizeof(buf1), "2021 02 01 %d:14:30 -0400 %s", h, (i < 12) ? "AM" : "PM");
+		if(tmparse(&tm, "YYYY MM DD hh:mm:ss Z", buf, nil, nil) == nil)
+			fail("parse: %r\n");
+		if(tmparse(&tt, "YYYY MM DD hh:mm:ss Z A", buf1, nil, nil) == nil)
+			fail("parse: %r\n");
+		if(tmnorm(&tm) != tmnorm(&tt))
+			print("bad am/pm parsed: %s != %s (%lld != %lld)\n", buf, buf1, tmnorm(&tm), tmnorm(&tt));
+	}
+
+	/* Time zone boundaries: entering DST */
+	if(tmtime(&tm, 1520733600, us_eastern) == nil)
+		fail("tmtime: tz boundary");
+	if(snprint(buf, sizeof(buf), "%τ", tmfmt(&tm, nil)) == -1)
+		fail("format: %r");
+	memset(&tm, 0, sizeof(tm));
+	if(tmparse(&tm, "WW MMM D hh:mm:ss ZZZ YYYY", buf, nil, nil) == nil)
+		fail("parse: %r\n");
+	if(tmnorm(&tm) != 1520733600)
+		fail("round trip timezone: %lld != 1520733600\n", tmnorm(&tm));
+
+	/* Time zone boundaries: leaving DST */
+	if(tmtime(&tm, 1541296800, us_eastern) == nil)
+		fail("tmtime: tz boundary");
+	if(snprint(buf, sizeof(buf), "%τ", tmfmt(&tm, nil)) == -1)
+		fail("format: %r\n");
+	memset(&tm, 0, sizeof(tm));
+	if(tmparse(&tm, "WW MMM D hh:mm:ss ZZZ YYYY", buf, nil, nil) == nil)
+		fail("parse: %r");
+	if(tmnorm(&tm) != 1541296800)
+		fail("round trip timezone: %lld != 1541296800\n", tmnorm(&tm));
+	
+
+	/* flexible date parsing */
+	if(tmparse(&tm, "?YYYY ?MM DD hh:mm:ss ?ZZZ", "89 04 10 20:14:30 -0400", nil, nil) == nil)
+		fail("failed parse: %r\n");
+	testtm("flexdates", 1989, 3, 10, 20, 14, 30, 0, &tm);
+	char **d, *flexdates[] = {
+		"1920 4 10 20:14:30 -0400",
+		"1920 04 10 20:14:30 -0400",
+		"1920 Apr 10 20:14:30 -0400",
+		"1920 Apr 10 20:14:30 -04:00",
+		"1920 Apr 10 20:14:30 -04:00",
+		"1920 Apr 10 20:14:30 -04:00",
+		"1920 April 10 20:14:30 EDT",
+		"20 April 10 20:14:30 EDT",
+		nil,
+	};
+	for(d = flexdates; *d; d++){
+		if(tmparse(&tm, "?YYYY ?MM DD hh:mm:ss ?ZZZ", *d, nil, nil) == nil)
+			fail("failed parse: %r\n");
+		testtm("flexdates", 1920, 3, 10, 20, 14, 30, 0, &tm);
+	}
+
+	/* Fuzzy zone */
+	if(tmparse(&tm, "?YYYY ?MM DD hh:mm:ss ?ZZZ", "2020 04 10 20:14:30 NOPE", nil, nil) == nil)
+		fail("failed parse: %r\n");
+	testtm("fuzzy-nonzone", 2020, 3, 10, 20, 14, 30, 0, &tm);
+
+	/* test tmnorm() offset */
+	memset(&tm, 0, sizeof(Tm));
+	tm.year = 120;
+	tm.sec=0;
+	tm.min=0;
+	tm.hour=0;
+	tm.mday=22;
+	tm.mon=5;
+	tm.tz=us_central;
+	tmnorm(&tm);
+	if(tmnorm(&tm) != 1592802000)
+		fail("tmnorm is not using the daylight savings time offset. %lld != 1592809200\n", tmnorm(&tm));
+
+	memset(&tm, 0, sizeof(Tm));
+	if(tmnow(&tm, us_central) == nil)
+		fail("tmnow(): %r");
+	tm.year = 120;
+	tm.sec=0;
+	tm.min=0;
+	tm.hour=0;
+	tm.mday=22;
+	tm.mon=5;
+	tm.tz=us_central;
+	s = tmnorm(&tm);
+	if(s != 1592802000)
+		fail("tmnorm is not using the daylight savings time offset. %lld != 1592809200\n", s);
+	tm.year = 120;
+	tm.sec=0;
+	tm.min=0;
+	tm.hour=0;
+	tm.mday=22;
+	tm.mon=0;
+	s = tmnorm(&tm);
+	if(s != 1579672800)
+		fail("tmnorm is not using the daylight savings time offset. %lld != 1579672800\n", s);
+	tm.tz=us_eastern;
+	s = tmnorm(&tm);
+	if(s != 1579669200)
+		fail("tmnorm converted to us_eastern. %lld != 1579669200\n", s);
+	tm.tz=us_central;
+	s = tmnorm(&tm);
+	if(s != 1579672800)
+		fail("tmnorm converted back to us_central. %lld != 1579672800\n", s);
+
+	if(failed)
+		exits("test failed");
+	exits(nil);
+}
diff --git a/sys/src/libc/test/mkfile b/sys/src/libc/test/mkfile
new file mode 100644
index 000000000..b6b5cce33
--- /dev/null
+++ b/sys/src/libc/test/mkfile
@@ -0,0 +1,8 @@
+</$objtype/mkfile
+
+TEST=\
+	date\
+	pow\
+	strchr\
+
+</sys/src/cmd/mktest
diff --git a/sys/src/libc/test/pow.c b/sys/src/libc/test/pow.c
new file mode 100644
index 000000000..6559faef8
--- /dev/null
+++ b/sys/src/libc/test/pow.c
@@ -0,0 +1,69 @@
+#include <u.h>
+#include <libc.h>
+
+/* We try to match the results specified by posix */
+void
+main(void)
+{
+	/*
+	 * For any value of y (including NaN), 
+	 *	if x is +1, 1.0 shall be returned.
+	 */
+	assert(pow(1.0, 132234.3) == 1.0);
+	assert(pow(1.0, NaN()) == 1.0);
+
+	/*
+	 * For any value of x (including NaN),
+	 *	if y is ±0, 1.0 shall be returned.
+	 */
+	assert(pow(10213.7, 0.0) == 1.0);
+	assert(pow(NaN(), 0.0) == 1.0);
+
+	/*
+	 *  If x or y is a NaN, a NaN shall be returned (unless
+	 * specified elsewhere in this description).
+	 */
+	assert(isNaN(pow(NaN(), NaN())));
+	assert(isNaN(pow(NaN(), 42.42)));
+	assert(isNaN(pow(42.42, NaN())));
+
+	/*
+	 * For any odd integer value of y > 0,
+	 *	if x is ±0, ±0 shall be returned.
+	 */
+	assert(pow(0.0, 1.0) == 0.0);
+	assert(pow(0.0, 39.0) == 0.0);
+	assert(pow(-0.0, 1.0) == -0.0);
+
+	/*
+	 * For y > 0 and not an odd integer,
+	 *	if x is ±0, +0 shall be returned.
+	 */
+	assert(pow(0.0, 2.0) == 0.0);
+	assert(pow(0.0, 34.0) == 0.0);
+	assert(pow(-0.0, 22.0) == 0.0);
+
+	/* If x is -1, and y is ±Inf, 1.0 shall be returned. */
+	assert(pow(-1.0, Inf(1)) == 1.0);
+	/* For |x| < 1, if y is -Inf, +Inf shall be returned. */
+	assert(isInf(pow(0.9, Inf(-1)), 1));
+	/* For |x| > 1, if y is -Inf, +0 shall be returned. */
+	assert(pow(1.1, Inf(-1)) == 0);
+	/* For |x| < 1, if y is +Inf, +0 shall be returned. */
+	assert(pow(0.9, Inf(1)) == 0.0);
+	/* For |x| > 1, if y is +Inf, +Inf shall be returned. */
+	assert(isInf(pow(1.1, Inf(1)), 1));
+	/* For y an odd integer < 0, if x is -Inf, -0 shall be returned. */
+	assert(pow(-7, Inf(-1)) == -0.0);
+	/* For y < 0 and not an odd integer, if x is -Inf, +0 shall be returned. */
+	assert(pow(Inf(-1), -0.3) == 0);
+	/* For y an odd integer > 0, if x is -Inf, -Inf shall be returned. */
+	assert(isInf(pow(Inf(-1), 7), -1));
+	/* For y > 0 and not an odd integer, if x is -Inf, +Inf shall be returned. */
+	assert(isInf(pow(Inf(-1), 19123.25324), 1));
+	/* For y < 0, if x is +Inf, +0 shall be returned. */
+	assert(pow(Inf(1), -1.3) == 0.0);
+	/* For y > 0, if x is +Inf, +Inf shall be returned. */
+	assert(isInf(pow(Inf(1), 1.7), 1));
+	exits(nil);
+}
diff --git a/sys/src/libc/test/strchr.c b/sys/src/libc/test/strchr.c
new file mode 100644
index 000000000..303c49376
--- /dev/null
+++ b/sys/src/libc/test/strchr.c
@@ -0,0 +1,47 @@
+#include <u.h>
+#include <libc.h>
+void
+chars(void)
+{
+	char *z = "";
+	char *v = "foo bar ss";
+	char *e;
+
+	e = strchr(z, 0);
+	assert(e == z);
+	e = strchr(z, 'z');
+	assert(e == nil);
+	e = strchr(v, L'z');
+	assert(e == nil);
+	e = strchr(v, L'a');
+	assert(e == v+5);
+	e = strchr(v, 0);
+	assert(e == v+10);
+}
+
+void
+runes(void)
+{
+	Rune *z = L"";
+	Rune *c = L"foo βαρ ß";
+	Rune *e;
+
+	e = runestrchr(z, 0);
+	assert(e == z);
+	e = runestrchr(z, L'z');
+	assert(e == nil);
+	e = runestrchr(c, L'z');
+	assert(e == nil);
+	e = runestrchr(c, L'α');
+	assert(e == c+5);
+	e = runestrchr(c, 0);
+	assert(e == c+9);
+}
+
+void
+main(void)
+{
+	chars();
+	runes();
+	exits(nil);
+}
diff --git a/sys/src/libmp/mkfile b/sys/src/libmp/mkfile
index 3c12457bd..51286e9f4 100644
--- a/sys/src/libmp/mkfile
+++ b/sys/src/libmp/mkfile
@@ -33,6 +33,11 @@ everything:V:
 	}
 	rm -f */*.[$OS]
 
+test:VQ:
+	cd test && mk test
+	
+
+# really dev tools more than tests
 test.$O: test.c /$objtype/include/u.h /sys/include/mp.h port/dat.h
 	$CC -Iport test.c
 
diff --git a/sys/src/libmp/test/main.c b/sys/src/libmp/test/main.c
index bf2ac6ec2..197e42adf 100644
--- a/sys/src/libmp/test/main.c
+++ b/sys/src/libmp/test/main.c
@@ -50,4 +50,5 @@ main()
 	
 	convtests();
 	tests();
+	exits(nil);
 }
diff --git a/sys/src/libmp/test/mkfile b/sys/src/libmp/test/mkfile
index bfbdd6948..da1acbf05 100644
--- a/sys/src/libmp/test/mkfile
+++ b/sys/src/libmp/test/mkfile
@@ -1,8 +1,9 @@
 </$objtype/mkfile
 
-TARG=test
+TEST=\
+	main
+
 OFILES=\
-	main.$O\
 	ld.$O\
 	gen.tab.$O\
 	convtest.$O\
@@ -11,7 +12,7 @@ HFILES=dat.h fns.h
 
 CLEANFILES=gen.tab.c
 
-</sys/src/cmd/mkone
+</sys/src/cmd/mktest
 
 gen.tab.c:D: testgen.rc
 	rc testgen.rc >gen.tab.c
diff --git a/sys/src/libsec/mkfile b/sys/src/libsec/mkfile
index a99bea664..a6d366e17 100644
--- a/sys/src/libsec/mkfile
+++ b/sys/src/libsec/mkfile
@@ -39,3 +39,6 @@ everything:V:
 		mk $MKFLAGS install
 	}
 	rm -f */*.[$OS]
+
+test:VQ:
+	# nothing
diff --git a/sys/src/libstdio/mkfile b/sys/src/libstdio/mkfile
index a3c0dbd6a..14dd297eb 100644
--- a/sys/src/libstdio/mkfile
+++ b/sys/src/libstdio/mkfile
@@ -64,6 +64,3 @@ UPDATE=\
 </sys/src/cmd/mksyslib
 # this code really can't handle any flow-analysis warnings
 CFLAGS=
-
-test:V:	$OFILES
-	ar vu libstdio.a $OFILES
diff --git a/sys/src/mkfile b/sys/src/mkfile
index 00c1800c8..b21f3c573 100644
--- a/sys/src/mkfile
+++ b/sys/src/mkfile
@@ -50,7 +50,7 @@ SUBSYS=ape\
 none:VQ:
 	echo mk all, install, clean, nuke, release, kernels, or libs
 
-all install clean nuke:VQ:
+all install clean nuke test:VQ:
 	date
 	for (i in $LIBS $SUBSYS $CMDS) @{
 		cd $i