[PATCH] Add test case for rev-list --parents --show-all

[Adam Simpkins <simpkins@facebook.com>]

This test case ensures that rev-list --parents --show-all gets the
parent history correct.  Normally, --parents rewrites parent history to
skip TREESAME parents.  However, --show-all causes TREESAME parents to
still be included in the revision list, so the parents should still be
included too.

Signed-off-by: Adam Simpkins <simpkins@facebook.com>
---

Looking through the code, I believe TREESAME commits are the only ones
affected by my earlier bug in simplify_commit().

 t/t6015-rev-list-show-all-parents.sh |   31 +++++++++++++++++++++++++++++++
 1 files changed, 31 insertions(+), 0 deletions(-)
 create mode 100644 t/t6015-rev-list-show-all-parents.sh

diff --git a/t/t6015-rev-list-show-all-parents.sh b/t/t6015-rev-list-show-all-parents.sh
new file mode 100644
index 0000000..8b146fb
--- /dev/null
+++ b/t/t6015-rev-list-show-all-parents.sh
@@ -0,0 +1,31 @@
+#!/bin/sh
+
+test_description='--show-all --parents does not rewrite TREESAME commits'
+
+. ./test-lib.sh
+
+test_expect_success 'set up --show-all --parents test' '
+	test_commit one foo.txt &&
+	commit1=`git rev-list -1 HEAD` &&
+	test_commit two bar.txt &&
+	commit2=`git rev-list -1 HEAD` &&
+	test_commit three foo.txt &&
+	commit3=`git rev-list -1 HEAD`
+	'
+
+test_expect_success '--parents rewrites TREESAME parents correctly' '
+	echo $commit3 $commit1 > expected &&
+	echo $commit1 >> expected &&
+	git rev-list --parents HEAD -- foo.txt > actual &&
+	test_cmp expected actual
+	'
+
+test_expect_success '--parents --show-all does not rewrites TREESAME parents' '
+	echo $commit3 $commit2 > expected &&
+	echo $commit2 $commit1 >> expected &&
+	echo $commit1 >> expected &&
+	git rev-list --parents --show-all HEAD -- foo.txt > actual &&
+	test_cmp expected actual
+	'
+
+test_done
-- 
1.6.0.4