tests: change some 'test $(git) = "x"' to test_cmp

Change some of the patterns in the test suite where we were hiding the
exit code from "git" by invoking it in a sub-shell within a "test"
expression to use temporary files and test_cmp instead.

These are not all the occurrences of this anti-pattern, but these in
particular hid issues where LSAN was dying, and I'd thus marked these
tests as passing under the linux-leaks CI job in past commits with
"TEST_PASSES_SANITIZE_LEAK=true". Let's deal with that by either
removing that marking, or skipping specific tests under
!SANITIZE_LEAK.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

t/t0002-gitfile.sh

@@ -65,9 +65,11 @@ test_expect_success 'check commit-tree' '
 	test_path_is_file "$REAL/objects/$(objpath $SHA)"
 '
 
-test_expect_success 'check rev-list' '
+test_expect_success !SANITIZE_LEAK 'check rev-list' '
 	git update-ref "HEAD" "$SHA" &&
-	test "$SHA" = "$(git rev-list HEAD)"
+	git rev-list HEAD >actual &&
+	echo $SHA >expected &&
+	test_cmp expected actual
 '
 
 test_expect_success 'setup_git_dir twice in subdir' '

t/t2200-add-update.sh

@@ -14,7 +14,6 @@ only the updates to dir/sub.
 Also tested are "git add -u" without limiting, and "git add -u"
 without contents changes, and other conditions'
 
-TEST_PASSES_SANITIZE_LEAK=true
 . ./test-lib.sh
 
 test_expect_success setup '
@@ -41,20 +40,28 @@ test_expect_success update '
 '
 
 test_expect_success 'update noticed a removal' '
-	test "$(git ls-files dir1/sub1)" = ""
+	git ls-files dir1/sub1 >out &&
+	test_must_be_empty out
 '
 
 test_expect_success 'update touched correct path' '
-	test "$(git diff-files --name-status dir2/sub3)" = ""
+	git diff-files --name-status dir2/sub3 >out &&
+	test_must_be_empty out
 '
 
 test_expect_success 'update did not touch other tracked files' '
-	test "$(git diff-files --name-status check)" = "M	check" &&
-	test "$(git diff-files --name-status top)" = "M	top"
+	echo "M	check" >expect &&
+	git diff-files --name-status check >actual &&
+	test_cmp expect actual &&
+
+	echo "M	top" >expect &&
+	git diff-files --name-status top >actual &&
+	test_cmp expect actual
 '
 
 test_expect_success 'update did not touch untracked files' '
-	test "$(git ls-files dir2/other)" = ""
+	git ls-files dir2/other >out &&
+	test_must_be_empty out
 '
 
 test_expect_success 'cache tree has not been corrupted' '
@@ -76,9 +83,8 @@ test_expect_success 'update from a subdirectory' '
 '
 
 test_expect_success 'change gets noticed' '
-
-	test "$(git diff-files --name-status dir1)" = ""
-
+	git diff-files --name-status dir1 >out &&
+	test_must_be_empty out
 '
 
 test_expect_success 'non-qualified update in subdir updates from the root' '
@@ -103,7 +109,8 @@ test_expect_success 'replace a file with a symlink' '
 test_expect_success 'add everything changed' '
 
 	git add -u &&
-	test -z "$(git diff-files)"
+	git diff-files >out &&
+	test_must_be_empty out
 
 '
 
@@ -111,7 +118,8 @@ test_expect_success 'touch and then add -u' '
 
 	touch check &&
 	git add -u &&
-	test -z "$(git diff-files)"
+	git diff-files >out &&
+	test_must_be_empty out
 
 '
 
@@ -119,7 +127,8 @@ test_expect_success 'touch and then add explicitly' '
 
 	touch check &&
 	git add check &&
-	test -z "$(git diff-files)"
+	git diff-files >out &&
+	test_must_be_empty out
 
 '
 

t/t4128-apply-root.sh

@@ -2,8 +2,6 @@
 
 test_description='apply same filename'
 
-
-TEST_PASSES_SANITIZE_LEAK=true
 . ./test-lib.sh
 
 test_expect_success 'setup' '
@@ -26,10 +24,11 @@ diff a/bla/blub/dir/file b/bla/blub/dir/file
 EOF
 
 test_expect_success 'apply --directory -p (1)' '
-
 	git apply --directory=some/sub -p3 --index patch &&
-	test Bello = $(git show :some/sub/dir/file) &&
-	test Bello = $(cat some/sub/dir/file)
+	echo Bello >expect &&
+	git show :some/sub/dir/file >actual &&
+	test_cmp expect actual &&
+	test_cmp expect some/sub/dir/file
 
 '
 
@@ -37,8 +36,10 @@ test_expect_success 'apply --directory -p (2) ' '
 
 	git reset --hard initial &&
 	git apply --directory=some/sub/ -p3 --index patch &&
-	test Bello = $(git show :some/sub/dir/file) &&
-	test Bello = $(cat some/sub/dir/file)
+	echo Bello >expect &&
+	git show :some/sub/dir/file >actual &&
+	test_cmp expect actual &&
+	test_cmp expect some/sub/dir/file
 
 '
 
@@ -55,8 +56,10 @@ EOF
 test_expect_success 'apply --directory (new file)' '
 	git reset --hard initial &&
 	git apply --directory=some/sub/dir/ --index patch &&
-	test content = $(git show :some/sub/dir/newfile) &&
-	test content = $(cat some/sub/dir/newfile)
+	echo content >expect &&
+	git show :some/sub/dir/newfile >actual &&
+	test_cmp expect actual &&
+	test_cmp expect some/sub/dir/newfile
 '
 
 cat > patch << EOF
@@ -72,8 +75,10 @@ EOF
 test_expect_success 'apply --directory -p (new file)' '
 	git reset --hard initial &&
 	git apply -p2 --directory=some/sub/dir/ --index patch &&
-	test content = $(git show :some/sub/dir/newfile2) &&
-	test content = $(cat some/sub/dir/newfile2)
+	echo content >expect &&
+	git show :some/sub/dir/newfile2 >actual &&
+	test_cmp expect actual &&
+	test_cmp expect some/sub/dir/newfile2
 '
 
 cat > patch << EOF
@@ -107,8 +112,10 @@ EOF
 test_expect_success 'apply --directory (quoted filename)' '
 	git reset --hard initial &&
 	git apply --directory=some/sub/dir/ --index patch &&
-	test content = $(git show :some/sub/dir/quotefile) &&
-	test content = $(cat some/sub/dir/quotefile)
+	echo content >expect &&
+	git show :some/sub/dir/quotefile >actual &&
+	test_cmp expect actual &&
+	test_cmp expect some/sub/dir/quotefile
 '
 
 test_done

t/t7103-reset-bare.sh

@@ -63,9 +63,12 @@ test_expect_success '"mixed" reset is not allowed in bare' '
 	test_must_fail git reset --mixed HEAD^
 '
 
-test_expect_success '"soft" reset is allowed in bare' '
+test_expect_success !SANITIZE_LEAK '"soft" reset is allowed in bare' '
 	git reset --soft HEAD^ &&
-	test "$(git show --pretty=format:%s | head -n 1)" = "one"
+	git show --pretty=format:%s >out &&
+	echo one >expect &&
+	head -n 1 out >actual &&
+	test_cmp expect actual
 '
 
 test_done