[PATCH] add tests for git diff --submodule

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Copied from the submodule summary test and changed to reflect the
differences in the output of git diff --submodule.

Signed-off-by: Jens Lehmann <Jens.Lehmann@xxxxxx>
---

Junio C Hamano schrieb:
> * js/diff-verbose-submodule (2009-10-14) 2 commits.
>  - add tests for git diff --submodule-summary
>  - Add the --submodule option to the diff option family
> 
> I should retitle and fix some comments in the tip commit (the tests have
> already been adjusted to use the real option name), but otherwise I think
> this is ready for 'next'.

Sorry for sending the updated test so late, i haven't had much time for
git in the last few days.

Apart from your changes necessary to make the test run again my changes are:

- rename from "t4041-diff-submodule-summary.sh" to "t4041-diff-submodule.sh"
- corrected all comments still speaking of "summary"
- added tests to test the behaviour of "--submodule" and "--submodule=short"


 t/t4041-diff-submodule.sh |  260 +++++++++++++++++++++++++++++++++++++++++++++
 1 files changed, 260 insertions(+), 0 deletions(-)
 create mode 100755 t/t4041-diff-submodule.sh

diff --git a/t/t4041-diff-submodule.sh b/t/t4041-diff-submodule.sh
new file mode 100755
index 0000000..5bb4fed
--- /dev/null
+++ b/t/t4041-diff-submodule.sh
@@ -0,0 +1,260 @@
+#!/bin/sh
+#
+# Copyright (c) 2009 Jens Lehmann, based on t7401 by Ping Yin
+#
+
+test_description='Support for verbose submodule differences in git diff
+
+This test tries to verify the sanity of the --submodule option of git diff.
+'
+
+. ./test-lib.sh
+
+add_file () {
+	sm=$1
+	shift
+	owd=$(pwd)
+	cd "$sm"
+	for name; do
+		echo "$name" > "$name" &&
+		git add "$name" &&
+		test_tick &&
+		git commit -m "Add $name"
+	done >/dev/null
+	git rev-parse --verify HEAD | cut -c1-7
+	cd "$owd"
+}
+commit_file () {
+	test_tick &&
+	git commit "$@" -m "Commit $*" >/dev/null
+}
+
+test_create_repo sm1 &&
+add_file . foo >/dev/null
+
+head1=$(add_file sm1 foo1 foo2)
+
+test_expect_success 'added submodule' "
+	git add sm1 &&
+	git diff-index -p --submodule=log HEAD >actual &&
+	diff actual - <<-EOF
+Submodule sm1 0000000...$head1 (new submodule)
+EOF
+"
+
+commit_file sm1 &&
+head2=$(add_file sm1 foo3)
+
+test_expect_success 'modified submodule(forward)' "
+	git diff-index -p --submodule=log HEAD >actual &&
+	diff actual - <<-EOF
+Submodule sm1 $head1..$head2:
+  > Add foo3
+EOF
+"
+
+test_expect_success 'modified submodule(forward)' "
+	git diff --submodule=log >actual &&
+	diff actual - <<-EOF
+Submodule sm1 $head1..$head2:
+  > Add foo3
+EOF
+"
+
+test_expect_success 'modified submodule(forward) --submodule' "
+	git diff --submodule >actual &&
+	diff actual - <<-EOF
+Submodule sm1 $head1..$head2:
+  > Add foo3
+EOF
+"
+
+fullhead1=$(cd sm1; git rev-list --max-count=1 $head1)
+fullhead2=$(cd sm1; git rev-list --max-count=1 $head2)
+test_expect_success 'modified submodule(forward) --submodule=short' "
+	git diff --submodule=short >actual &&
+	diff actual - <<-EOF
+diff --git a/sm1 b/sm1
+index $head1..$head2 160000
+--- a/sm1
++++ b/sm1
+@@ -1 +1 @@
+-Subproject commit $fullhead1
++Subproject commit $fullhead2
+EOF
+"
+
+commit_file sm1 &&
+cd sm1 &&
+git reset --hard HEAD~2 >/dev/null &&
+head3=$(git rev-parse --verify HEAD | cut -c1-7) &&
+cd ..
+
+test_expect_success 'modified submodule(backward)' "
+	git diff-index -p --submodule=log HEAD >actual &&
+	diff actual - <<-EOF
+Submodule sm1 $head2..$head3 (rewind):
+  < Add foo3
+  < Add foo2
+EOF
+"
+
+head4=$(add_file sm1 foo4 foo5) &&
+head4_full=$(GIT_DIR=sm1/.git git rev-parse --verify HEAD)
+test_expect_success 'modified submodule(backward and forward)' "
+	git diff-index -p --submodule=log HEAD >actual &&
+	diff actual - <<-EOF
+Submodule sm1 $head2...$head4:
+  > Add foo5
+  > Add foo4
+  < Add foo3
+  < Add foo2
+EOF
+"
+
+commit_file sm1 &&
+mv sm1 sm1-bak &&
+echo sm1 >sm1 &&
+head5=$(git hash-object sm1 | cut -c1-7) &&
+git add sm1 &&
+rm -f sm1 &&
+mv sm1-bak sm1
+
+test_expect_success 'typechanged submodule(submodule->blob), --cached' "
+	git diff --submodule=log --cached >actual &&
+	diff actual - <<-EOF
+Submodule sm1 41fbea9...0000000 (submodule deleted)
+diff --git a/sm1 b/sm1
+new file mode 100644
+index 0000000..9da5fb8
+--- /dev/null
++++ b/sm1
+@@ -0,0 +1 @@
++sm1
+EOF
+"
+
+test_expect_success 'typechanged submodule(submodule->blob)' "
+	git diff --submodule=log >actual &&
+	diff actual - <<-EOF
+diff --git a/sm1 b/sm1
+deleted file mode 100644
+index 9da5fb8..0000000
+--- a/sm1
++++ /dev/null
+@@ -1 +0,0 @@
+-sm1
+Submodule sm1 0000000...$head4 (new submodule)
+EOF
+"
+
+rm -rf sm1 &&
+git checkout-index sm1
+test_expect_success 'typechanged submodule(submodule->blob)' "
+	git diff-index -p --submodule=log HEAD >actual &&
+	diff actual - <<-EOF
+Submodule sm1 $head4...0000000 (submodule deleted)
+diff --git a/sm1 b/sm1
+new file mode 100644
+index 0000000..$head5
+--- /dev/null
++++ b/sm1
+@@ -0,0 +1 @@
++sm1
+EOF
+"
+
+rm -f sm1 &&
+test_create_repo sm1 &&
+head6=$(add_file sm1 foo6 foo7)
+fullhead6=$(cd sm1; git rev-list --max-count=1 $head6)
+test_expect_success 'nonexistent commit' "
+	git diff-index -p --submodule=log HEAD >actual &&
+	diff actual - <<-EOF
+Submodule sm1 $head4...$head6 (commits not present)
+EOF
+"
+
+commit_file
+test_expect_success 'typechanged submodule(blob->submodule)' "
+	git diff-index -p --submodule=log HEAD >actual &&
+	diff actual - <<-EOF
+diff --git a/sm1 b/sm1
+deleted file mode 100644
+index $head5..0000000
+--- a/sm1
++++ /dev/null
+@@ -1 +0,0 @@
+-sm1
+Submodule sm1 0000000...$head6 (new submodule)
+EOF
+"
+
+commit_file sm1 &&
+rm -rf sm1
+test_expect_success 'deleted submodule' "
+	git diff-index -p --submodule=log HEAD >actual &&
+	diff actual - <<-EOF
+Submodule sm1 $head6...0000000 (submodule deleted)
+EOF
+"
+
+test_create_repo sm2 &&
+head7=$(add_file sm2 foo8 foo9) &&
+git add sm2
+
+test_expect_success 'multiple submodules' "
+	git diff-index -p --submodule=log HEAD >actual &&
+	diff actual - <<-EOF
+Submodule sm1 $head6...0000000 (submodule deleted)
+Submodule sm2 0000000...$head7 (new submodule)
+EOF
+"
+
+test_expect_success 'path filter' "
+	git diff-index -p --submodule=log HEAD sm2 >actual &&
+	diff actual - <<-EOF
+Submodule sm2 0000000...$head7 (new submodule)
+EOF
+"
+
+commit_file sm2
+test_expect_success 'given commit' "
+	git diff-index -p --submodule=log HEAD^ >actual &&
+	diff actual - <<-EOF
+Submodule sm1 $head6...0000000 (submodule deleted)
+Submodule sm2 0000000...$head7 (new submodule)
+EOF
+"
+
+test_expect_success 'given commit --submodule' "
+	git diff-index -p --submodule HEAD^ >actual &&
+	diff actual - <<-EOF
+Submodule sm1 $head6...0000000 (submodule deleted)
+Submodule sm2 0000000...$head7 (new submodule)
+EOF
+"
+
+fullhead7=$(cd sm2; git rev-list --max-count=1 $head7)
+
+test_expect_success 'given commit --submodule=short' "
+	git diff-index -p --submodule=short HEAD^ >actual &&
+	diff actual - <<-EOF
+diff --git a/sm1 b/sm1
+deleted file mode 160000
+index $head6..0000000
+--- a/sm1
++++ /dev/null
+@@ -1 +0,0 @@
+-Subproject commit $fullhead6
+diff --git a/sm2 b/sm2
+new file mode 160000
+index 0000000..$head7
+--- /dev/null
++++ b/sm2
+@@ -0,0 +1 @@
++Subproject commit $fullhead7
+EOF
+"
+
+test_done
-- 
1.6.5.rc2.19.gcbaec.dirty

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