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+#!/bin/sh
+
+test_description='range-diff tests'
+
+. ./test-lib.sh
+
+# Note that because of the range-diff's heuristics, test_commit does more
+# harm than good. We need some real history.
+
+test_expect_success 'setup' '
+ git fast-import < "$TEST_DIRECTORY"/t3206/history.export
+'
+
+test_expect_success 'simple A..B A..C (unmodified)' '
+ git range-diff --no-color master..topic master..unmodified \
+ >actual &&
+ cat >expected <<-EOF &&
+ 1: 4de457d = 1: 35b9b25 s/5/A/
+ 2: fccce22 = 2: de345ab s/4/A/
+ 3: 147e64e = 3: 9af6654 s/11/B/
+ 4: a63e992 = 4: 2901f77 s/12/B/
+ EOF
+ test_cmp expected actual
+'
+
+test_expect_success 'simple B...C (unmodified)' '
+ git range-diff --no-color topic...unmodified >actual &&
+ # same "expected" as above
+ test_cmp expected actual
+'
+
+test_expect_success 'simple A B C (unmodified)' '
+ git range-diff --no-color master topic unmodified >actual &&
+ # same "expected" as above
+ test_cmp expected actual
+'
+
+test_expect_success 'trivial reordering' '
+ git range-diff --no-color master topic reordered >actual &&
+ cat >expected <<-EOF &&
+ 1: 4de457d = 1: aca177a s/5/A/
+ 3: 147e64e = 2: 14ad629 s/11/B/
+ 4: a63e992 = 3: ee58208 s/12/B/
+ 2: fccce22 = 4: 307b27a s/4/A/
+ EOF
+ test_cmp expected actual
+'
+
+test_expect_success 'removed a commit' '
+ git range-diff --no-color master topic removed >actual &&
+ cat >expected <<-EOF &&
+ 1: 4de457d = 1: 7657159 s/5/A/
+ 2: fccce22 < -: ------- s/4/A/
+ 3: 147e64e = 2: 43d84d3 s/11/B/
+ 4: a63e992 = 3: a740396 s/12/B/
+ EOF
+ test_cmp expected actual
+'
+
+test_expect_success 'added a commit' '
+ git range-diff --no-color master topic added >actual &&
+ cat >expected <<-EOF &&
+ 1: 4de457d = 1: 2716022 s/5/A/
+ 2: fccce22 = 2: b62accd s/4/A/
+ -: ------- > 3: df46cfa s/6/A/
+ 3: 147e64e = 4: 3e64548 s/11/B/
+ 4: a63e992 = 5: 12b4063 s/12/B/
+ EOF
+ test_cmp expected actual
+'
+
+test_expect_success 'new base, A B C' '
+ git range-diff --no-color master topic rebased >actual &&
+ cat >expected <<-EOF &&
+ 1: 4de457d = 1: cc9c443 s/5/A/
+ 2: fccce22 = 2: c5d9641 s/4/A/
+ 3: 147e64e = 3: 28cc2b6 s/11/B/
+ 4: a63e992 = 4: 5628ab7 s/12/B/
+ EOF
+ test_cmp expected actual
+'
+
+test_expect_success 'new base, B...C' '
+ # this syntax includes the commits from master!
+ git range-diff --no-color topic...rebased >actual &&
+ cat >expected <<-EOF &&
+ -: ------- > 1: a31b12e unrelated
+ 1: 4de457d = 2: cc9c443 s/5/A/
+ 2: fccce22 = 3: c5d9641 s/4/A/
+ 3: 147e64e = 4: 28cc2b6 s/11/B/
+ 4: a63e992 = 5: 5628ab7 s/12/B/
+ EOF
+ test_cmp expected actual
+'
+
+test_expect_success 'changed commit' '
+ git range-diff --no-color topic...changed >actual &&
+ cat >expected <<-EOF &&
+ 1: 4de457d = 1: a4b3333 s/5/A/
+ 2: fccce22 = 2: f51d370 s/4/A/
+ 3: 147e64e ! 3: 0559556 s/11/B/
+ @@ -10,7 +10,7 @@
+ 9
+ 10
+ -11
+ -+B
+ ++BB
+ 12
+ 13
+ 14
+ 4: a63e992 ! 4: d966c5c s/12/B/
+ @@ -8,7 +8,7 @@
+ @@
+ 9
+ 10
+ - B
+ + BB
+ -12
+ +B
+ 13
+ EOF
+ test_cmp expected actual
+'
+
+test_expect_success 'changed message' '
+ git range-diff --no-color topic...changed-message >actual &&
+ sed s/Z/\ /g >expected <<-EOF &&
+ 1: 4de457d = 1: f686024 s/5/A/
+ 2: fccce22 ! 2: 4ab067d s/4/A/
+ @@ -2,6 +2,8 @@
+ Z
+ Z s/4/A/
+ Z
+ + Also a silly comment here!
+ +
+ Zdiff --git a/file b/file
+ Z--- a/file
+ Z+++ b/file
+ 3: 147e64e = 3: b9cb956 s/11/B/
+ 4: a63e992 = 4: 8add5f1 s/12/B/
+ EOF
+ test_cmp expected actual
+'
+
+test_expect_success 'no commits on one side' '
+ git commit --amend -m "new message" &&
+ git range-diff master HEAD@{1} HEAD
+'
+
+test_done