1 files changed, 469 insertions, 0 deletions
diff --git a/t/t6030-bisect-porcelain.sh b/t/t6030-bisect-porcelain.sh
new file mode 100755
index 0000000..85fa39c
--- /dev/null
+++ b/t/t6030-bisect-porcelain.sh
@@ -0,0 +1,469 @@
+#!/bin/sh
+#
+# Copyright (c) 2007 Christian Couder
+#
+test_description='Tests git bisect functionality'
+
+exec </dev/null
+
+. ./test-lib.sh
+
+add_line_into_file()
+{
+    _line=$1
+    _file=$2
+
+    if [ -f "$_file" ]; then
+        echo "$_line" >> $_file || return $?
+        MSG="Add <$_line> into <$_file>."
+    else
+        echo "$_line" > $_file || return $?
+        git add $_file || return $?
+        MSG="Create file <$_file> with <$_line> inside."
+    fi
+
+    test_tick
+    git commit --quiet -m "$MSG" $_file
+}
+
+HASH1=
+HASH2=
+HASH3=
+HASH4=
+
+test_expect_success 'set up basic repo with 1 file (hello) and 4 commits' '
+     add_line_into_file "1: Hello World" hello &&
+     HASH1=$(git rev-parse --verify HEAD) &&
+     add_line_into_file "2: A new day for git" hello &&
+     HASH2=$(git rev-parse --verify HEAD) &&
+     add_line_into_file "3: Another new day for git" hello &&
+     HASH3=$(git rev-parse --verify HEAD) &&
+     add_line_into_file "4: Ciao for now" hello &&
+     HASH4=$(git rev-parse --verify HEAD)
+'
+
+test_expect_success 'bisect starts with only one bad' '
+	git bisect reset &&
+	git bisect start &&
+	git bisect bad $HASH4 &&
+	git bisect next
+'
+
+test_expect_success 'bisect does not start with only one good' '
+	git bisect reset &&
+	git bisect start &&
+	git bisect good $HASH1 || return 1
+
+	if git bisect next
+	then
+		echo Oops, should have failed.
+		false
+	else
+		:
+	fi
+'
+
+test_expect_success 'bisect start with one bad and good' '
+	git bisect reset &&
+	git bisect start &&
+	git bisect good $HASH1 &&
+	git bisect bad $HASH4 &&
+	git bisect next
+'
+
+test_expect_success 'bisect fails if given any junk instead of revs' '
+	git bisect reset &&
+	test_must_fail git bisect start foo $HASH1 -- &&
+	test_must_fail git bisect start $HASH4 $HASH1 bar -- &&
+	test -z "$(git for-each-ref "refs/bisect/*")" &&
+	test -z "$(ls .git/BISECT_* 2>/dev/null)" &&
+	git bisect start &&
+	test_must_fail git bisect good foo $HASH1 &&
+	test_must_fail git bisect good $HASH1 bar &&
+	test_must_fail git bisect bad frotz &&
+	test_must_fail git bisect bad $HASH3 $HASH4 &&
+	test_must_fail git bisect skip bar $HASH3 &&
+	test_must_fail git bisect skip $HASH1 foo &&
+	test -z "$(git for-each-ref "refs/bisect/*")" &&
+	git bisect good $HASH1 &&
+	git bisect bad $HASH4
+'
+
+test_expect_success 'bisect reset: back in the master branch' '
+	git bisect reset &&
+	echo "* master" > branch.expect &&
+	git branch > branch.output &&
+	cmp branch.expect branch.output
+'
+
+test_expect_success 'bisect reset: back in another branch' '
+	git checkout -b other &&
+	git bisect start &&
+	git bisect good $HASH1 &&
+	git bisect bad $HASH3 &&
+	git bisect reset &&
+	echo "  master" > branch.expect &&
+	echo "* other" >> branch.expect &&
+	git branch > branch.output &&
+	cmp branch.expect branch.output
+'
+
+test_expect_success 'bisect reset when not bisecting' '
+	git bisect reset &&
+	git branch > branch.output &&
+	cmp branch.expect branch.output
+'
+
+test_expect_success 'bisect reset removes packed refs' '
+	git bisect reset &&
+	git bisect start &&
+	git bisect good $HASH1 &&
+	git bisect bad $HASH3 &&
+	git pack-refs --all --prune &&
+	git bisect next &&
+	git bisect reset &&
+	test -z "$(git for-each-ref "refs/bisect/*")" &&
+	test -z "$(git for-each-ref "refs/heads/bisect")"
+'
+
+test_expect_success 'bisect start: back in good branch' '
+	git branch > branch.output &&
+	grep "* other" branch.output > /dev/null &&
+	git bisect start $HASH4 $HASH1 -- &&
+	git bisect good &&
+	git bisect start $HASH4 $HASH1 -- &&
+	git bisect bad &&
+	git bisect reset &&
+	git branch > branch.output &&
+	grep "* other" branch.output > /dev/null
+'
+
+test_expect_success 'bisect start: no ".git/BISECT_START" if junk rev' '
+	git bisect start $HASH4 $HASH1 -- &&
+	git bisect good &&
+	test_must_fail git bisect start $HASH4 foo -- &&
+	git branch > branch.output &&
+	grep "* other" branch.output > /dev/null &&
+	test_must_fail test -e .git/BISECT_START
+'
+
+test_expect_success 'bisect start: no ".git/BISECT_START" if mistaken rev' '
+	git bisect start $HASH4 $HASH1 -- &&
+	git bisect good &&
+	test_must_fail git bisect start $HASH1 $HASH4 -- &&
+	git branch > branch.output &&
+	grep "* other" branch.output > /dev/null &&
+	test_must_fail test -e .git/BISECT_START
+'
+
+test_expect_success 'bisect start: no ".git/BISECT_START" if checkout error' '
+	echo "temp stuff" > hello &&
+	test_must_fail git bisect start $HASH4 $HASH1 -- &&
+	git branch &&
+	git branch > branch.output &&
+	grep "* other" branch.output > /dev/null &&
+	test_must_fail test -e .git/BISECT_START &&
+	test -z "$(git for-each-ref "refs/bisect/*")" &&
+	git checkout HEAD hello
+'
+
+# $HASH1 is good, $HASH4 is bad, we skip $HASH3
+# but $HASH2 is bad,
+# so we should find $HASH2 as the first bad commit
+test_expect_success 'bisect skip: successfull result' '
+	git bisect reset &&
+	git bisect start $HASH4 $HASH1 &&
+	git bisect skip &&
+	git bisect bad > my_bisect_log.txt &&
+	grep "$HASH2 is first bad commit" my_bisect_log.txt &&
+	git bisect reset
+'
+
+# $HASH1 is good, $HASH4 is bad, we skip $HASH3 and $HASH2
+# so we should not be able to tell the first bad commit
+# among $HASH2, $HASH3 and $HASH4
+test_expect_success 'bisect skip: cannot tell between 3 commits' '
+	git bisect start $HASH4 $HASH1 &&
+	git bisect skip || return 1
+
+	if git bisect skip > my_bisect_log.txt
+	then
+		echo Oops, should have failed.
+		false
+	else
+		test $? -eq 2 &&
+		grep "first bad commit could be any of" my_bisect_log.txt &&
+		! grep $HASH1 my_bisect_log.txt &&
+		grep $HASH2 my_bisect_log.txt &&
+		grep $HASH3 my_bisect_log.txt &&
+		grep $HASH4 my_bisect_log.txt &&
+		git bisect reset
+	fi
+'
+
+# $HASH1 is good, $HASH4 is bad, we skip $HASH3
+# but $HASH2 is good,
+# so we should not be able to tell the first bad commit
+# among $HASH3 and $HASH4
+test_expect_success 'bisect skip: cannot tell between 2 commits' '
+	git bisect start $HASH4 $HASH1 &&
+	git bisect skip || return 1
+
+	if git bisect good > my_bisect_log.txt
+	then
+		echo Oops, should have failed.
+		false
+	else
+		test $? -eq 2 &&
+		grep "first bad commit could be any of" my_bisect_log.txt &&
+		! grep $HASH1 my_bisect_log.txt &&
+		! grep $HASH2 my_bisect_log.txt &&
+		grep $HASH3 my_bisect_log.txt &&
+		grep $HASH4 my_bisect_log.txt &&
+		git bisect reset
+	fi
+'
+
+# We want to automatically find the commit that
+# introduced "Another" into hello.
+test_expect_success \
+    '"git bisect run" simple case' \
+    'echo "#"\!"/bin/sh" > test_script.sh &&
+     echo "grep Another hello > /dev/null" >> test_script.sh &&
+     echo "test \$? -ne 0" >> test_script.sh &&
+     chmod +x test_script.sh &&
+     git bisect start &&
+     git bisect good $HASH1 &&
+     git bisect bad $HASH4 &&
+     git bisect run ./test_script.sh > my_bisect_log.txt &&
+     grep "$HASH3 is first bad commit" my_bisect_log.txt &&
+     git bisect reset'
+
+# We want to automatically find the commit that
+# introduced "Ciao" into hello.
+test_expect_success \
+    '"git bisect run" with more complex "git bisect start"' \
+    'echo "#"\!"/bin/sh" > test_script.sh &&
+     echo "grep Ciao hello > /dev/null" >> test_script.sh &&
+     echo "test \$? -ne 0" >> test_script.sh &&
+     chmod +x test_script.sh &&
+     git bisect start $HASH4 $HASH1 &&
+     git bisect run ./test_script.sh > my_bisect_log.txt &&
+     grep "$HASH4 is first bad commit" my_bisect_log.txt &&
+     git bisect reset'
+
+# $HASH1 is good, $HASH5 is bad, we skip $HASH3
+# but $HASH4 is good,
+# so we should find $HASH5 as the first bad commit
+HASH5=
+test_expect_success 'bisect skip: add line and then a new test' '
+	add_line_into_file "5: Another new line." hello &&
+	HASH5=$(git rev-parse --verify HEAD) &&
+	git bisect start $HASH5 $HASH1 &&
+	git bisect skip &&
+	git bisect good > my_bisect_log.txt &&
+	grep "$HASH5 is first bad commit" my_bisect_log.txt &&
+	git bisect log > log_to_replay.txt &&
+	git bisect reset
+'
+
+test_expect_success 'bisect skip and bisect replay' '
+	git bisect replay log_to_replay.txt > my_bisect_log.txt &&
+	grep "$HASH5 is first bad commit" my_bisect_log.txt &&
+	git bisect reset
+'
+
+HASH6=
+test_expect_success 'bisect run & skip: cannot tell between 2' '
+	add_line_into_file "6: Yet a line." hello &&
+	HASH6=$(git rev-parse --verify HEAD) &&
+	echo "#"\!"/bin/sh" > test_script.sh &&
+	echo "sed -ne \\\$p hello | grep Ciao > /dev/null && exit 125" >> test_script.sh &&
+	echo "grep line hello > /dev/null" >> test_script.sh &&
+	echo "test \$? -ne 0" >> test_script.sh &&
+	chmod +x test_script.sh &&
+	git bisect start $HASH6 $HASH1 &&
+	if git bisect run ./test_script.sh > my_bisect_log.txt
+	then
+		echo Oops, should have failed.
+		false
+	else
+		test $? -eq 2 &&
+		grep "first bad commit could be any of" my_bisect_log.txt &&
+		! grep $HASH3 my_bisect_log.txt &&
+		! grep $HASH6 my_bisect_log.txt &&
+		grep $HASH4 my_bisect_log.txt &&
+		grep $HASH5 my_bisect_log.txt
+	fi
+'
+
+HASH7=
+test_expect_success 'bisect run & skip: find first bad' '
+	git bisect reset &&
+	add_line_into_file "7: Should be the last line." hello &&
+	HASH7=$(git rev-parse --verify HEAD) &&
+	echo "#"\!"/bin/sh" > test_script.sh &&
+	echo "sed -ne \\\$p hello | grep Ciao > /dev/null && exit 125" >> test_script.sh &&
+	echo "sed -ne \\\$p hello | grep day > /dev/null && exit 125" >> test_script.sh &&
+	echo "grep Yet hello > /dev/null" >> test_script.sh &&
+	echo "test \$? -ne 0" >> test_script.sh &&
+	chmod +x test_script.sh &&
+	git bisect start $HASH7 $HASH1 &&
+	git bisect run ./test_script.sh > my_bisect_log.txt &&
+	grep "$HASH6 is first bad commit" my_bisect_log.txt
+'
+
+test_expect_success 'bisect starting with a detached HEAD' '
+
+	git bisect reset &&
+	git checkout master^ &&
+	HEAD=$(git rev-parse --verify HEAD) &&
+	git bisect start &&
+	test $HEAD = $(cat .git/BISECT_START) &&
+	git bisect reset &&
+	test $HEAD = $(git rev-parse --verify HEAD)
+'
+
+test_expect_success 'bisect errors out if bad and good are mistaken' '
+	git bisect reset &&
+	test_must_fail git bisect start $HASH2 $HASH4 2> rev_list_error &&
+	grep "mistake good and bad" rev_list_error &&
+	git bisect reset
+'
+
+test_expect_success 'bisect does not create a "bisect" branch' '
+	git bisect reset &&
+	git bisect start $HASH7 $HASH1 &&
+	git branch bisect &&
+	rev_hash4=$(git rev-parse --verify HEAD) &&
+	test "$rev_hash4" = "$HASH4" &&
+	git branch -D bisect &&
+	git bisect good &&
+	git branch bisect &&
+	rev_hash6=$(git rev-parse --verify HEAD) &&
+	test "$rev_hash6" = "$HASH6" &&
+	git bisect good > my_bisect_log.txt &&
+	grep "$HASH7 is first bad commit" my_bisect_log.txt &&
+	git bisect reset &&
+	rev_hash6=$(git rev-parse --verify bisect) &&
+	test "$rev_hash6" = "$HASH6" &&
+	git branch -D bisect
+'
+
+# This creates a "side" branch to test "siblings" cases.
+#
+# H1-H2-H3-H4-H5-H6-H7  <--other
+#            \
+#             S5-S6-S7  <--side
+#
+test_expect_success 'side branch creation' '
+	git bisect reset &&
+	git checkout -b side $HASH4 &&
+	add_line_into_file "5(side): first line on a side branch" hello2 &&
+	SIDE_HASH5=$(git rev-parse --verify HEAD) &&
+	add_line_into_file "6(side): second line on a side branch" hello2 &&
+	SIDE_HASH6=$(git rev-parse --verify HEAD) &&
+	add_line_into_file "7(side): third line on a side branch" hello2 &&
+	SIDE_HASH7=$(git rev-parse --verify HEAD)
+'
+
+test_expect_success 'good merge base when good and bad are siblings' '
+	git bisect start "$HASH7" "$SIDE_HASH7" > my_bisect_log.txt &&
+	grep "merge base must be tested" my_bisect_log.txt &&
+	grep $HASH4 my_bisect_log.txt &&
+	git bisect good > my_bisect_log.txt &&
+	test_must_fail grep "merge base must be tested" my_bisect_log.txt &&
+	grep $HASH6 my_bisect_log.txt &&
+	git bisect reset
+'
+test_expect_success 'skipped merge base when good and bad are siblings' '
+	git bisect start "$SIDE_HASH7" "$HASH7" > my_bisect_log.txt &&
+	grep "merge base must be tested" my_bisect_log.txt &&
+	grep $HASH4 my_bisect_log.txt &&
+	git bisect skip > my_bisect_log.txt 2>&1 &&
+	grep "Warning" my_bisect_log.txt &&
+	grep $SIDE_HASH6 my_bisect_log.txt &&
+	git bisect reset
+'
+
+test_expect_success 'bad merge base when good and bad are siblings' '
+	git bisect start "$HASH7" HEAD > my_bisect_log.txt &&
+	grep "merge base must be tested" my_bisect_log.txt &&
+	grep $HASH4 my_bisect_log.txt &&
+	test_must_fail git bisect bad > my_bisect_log.txt 2>&1 &&
+	grep "merge base $HASH4 is bad" my_bisect_log.txt &&
+	grep "fixed between $HASH4 and \[$SIDE_HASH7\]" my_bisect_log.txt &&
+	git bisect reset
+'
+
+# This creates a few more commits (A and B) to test "siblings" cases
+# when a good and a bad rev have many merge bases.
+#
+# We should have the following:
+#
+# H1-H2-H3-H4-H5-H6-H7
+#            \  \     \
+#             S5-A     \
+#              \        \
+#               S6-S7----B
+#
+# And there A and B have 2 merge bases (S5 and H5) that should be
+# reported by "git merge-base --all A B".
+#
+test_expect_success 'many merge bases creation' '
+	git checkout "$SIDE_HASH5" &&
+	git merge -m "merge HASH5 and SIDE_HASH5" "$HASH5" &&
+	A_HASH=$(git rev-parse --verify HEAD) &&
+	git checkout side &&
+	git merge -m "merge HASH7 and SIDE_HASH7" "$HASH7" &&
+	B_HASH=$(git rev-parse --verify HEAD) &&
+	git merge-base --all "$A_HASH" "$B_HASH" > merge_bases.txt &&
+	test $(wc -l < merge_bases.txt) = "2" &&
+	grep "$HASH5" merge_bases.txt &&
+	grep "$SIDE_HASH5" merge_bases.txt
+'
+
+test_expect_success 'good merge bases when good and bad are siblings' '
+	git bisect start "$B_HASH" "$A_HASH" > my_bisect_log.txt &&
+	grep "merge base must be tested" my_bisect_log.txt &&
+	git bisect good > my_bisect_log2.txt &&
+	grep "merge base must be tested" my_bisect_log2.txt &&
+	{
+		{
+			grep "$SIDE_HASH5" my_bisect_log.txt &&
+			grep "$HASH5" my_bisect_log2.txt
+		} || {
+			grep "$SIDE_HASH5" my_bisect_log2.txt &&
+			grep "$HASH5" my_bisect_log.txt
+		}
+	} &&
+	git bisect reset
+'
+
+check_trace() {
+	grep "$1" "$GIT_TRACE" | grep "\^$2" | grep "$3" >/dev/null
+}
+
+test_expect_success 'optimized merge base checks' '
+	GIT_TRACE="$(pwd)/trace.log" &&
+	export GIT_TRACE &&
+	git bisect start "$HASH7" "$SIDE_HASH7" > my_bisect_log.txt &&
+	grep "merge base must be tested" my_bisect_log.txt &&
+	grep "$HASH4" my_bisect_log.txt &&
+	check_trace "rev-list" "$HASH7" "$SIDE_HASH7" &&
+	git bisect good > my_bisect_log2.txt &&
+	test -f ".git/BISECT_ANCESTORS_OK" &&
+	test "$HASH6" = $(git rev-parse --verify HEAD) &&
+	: > "$GIT_TRACE" &&
+	git bisect bad > my_bisect_log3.txt &&
+	test_must_fail check_trace "rev-list" "$HASH6" "$SIDE_HASH7" &&
+	git bisect good "$A_HASH" > my_bisect_log4.txt &&
+	grep "merge base must be tested" my_bisect_log4.txt &&
+	test_must_fail test -f ".git/BISECT_ANCESTORS_OK" &&
+	check_trace "rev-list" "$HASH6" "$A_HASH" &&
+	unset GIT_TRACE
+'
+
+#
+#
+test_done