Signed-off-by: Stephan Beyer <s-beyer@xxxxxxx>
---
Notes:
Based on the review by Christian Couder, I use test_cmp_rev()
instead of non-standard test ... -o ...
t/t8010-bisect-algorithm.sh | 155 ++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 155 insertions(+)
create mode 100755 t/t8010-bisect-algorithm.sh
diff --git a/t/t8010-bisect-algorithm.sh b/t/t8010-bisect-algorithm.sh
new file mode 100755
index 0000000..b06053a
--- /dev/null
+++ b/t/t8010-bisect-algorithm.sh
@@ -0,0 +1,155 @@
+#!/bin/sh
+#
+# Copyright (c) 2016 Stephan Beyer
+#
+test_description='Tests git bisect algorithm'
+
+. ./test-lib.sh
+
+test_expect_success 'set up a history for the test' '
+ test_commit A1 A 1 &&
+ test_commit A2 A 2 &&
+ test_commit A3 A 3 &&
+ test_commit A4 A 4 &&
+ test_commit A5 A 5 &&
+ test_commit A6 A 6 &&
+ git checkout -b b A5 &&
+ test_commit B1 B 1 &&
+ git checkout master &&
+ test_commit A7 A 7 &&
+ git checkout b &&
+ test_commit B2 B 2 &&
+ git checkout master &&
+ test_commit A8 A 8 &&
+ test_merge Bmerge b &&
+ git checkout b &&
+ test_commit B3 B 3 &&
+ git checkout -b c A7 &&
+ test_commit C1 C 1 &&
+ git checkout -b d A3 &&
+ test_commit D1 D 1 &&
+ git checkout c &&
+ test_commit C2 C 2 &&
+ git checkout d &&
+ test_commit D2 D 2 &&
+ git checkout c &&
+ test_commit C3 C 3 &&
+ git checkout master &&
+ git merge -m BCDmerge b c d &&
+ git tag BCDmerge &&
+ test_commit A9 A 9 &&
+ git checkout d &&
+ test_commit D3 &&
+ git checkout master
+'
+
+test_expect_success 'bisect algorithm works in linear history with an odd number of commits' '
+ git bisect start A7 &&
+ git bisect next &&
+ test_cmp_rev HEAD A3 A4
+'
+
+test_expect_success 'bisect algorithm works in linear history with an even number of commits' '
+ git bisect reset &&
+ git bisect start A8 &&
+ git bisect next &&
+ test_cmp_rev HEAD A4
+'
+
+test_expect_success 'bisect algorithm works with a merge' '
+ git bisect reset &&
+ git bisect start Bmerge &&
+ git bisect next &&
+ test_cmp_rev HEAD A5 &&
+ git bisect good &&
+ test_cmp_rev HEAD A8 &&
+ git bisect good &&
+ test_cmp_rev HEAD B1 B2
+'
+
+# | w min | w min | w min | w min |
+# B---. BCDmerge | 18 0 | 9 0 | 5 0 | 3 0 |
+# |\ \ \ | | | | |
+# | | | * D2 | 5 5 | 2 2 | 2 2*| good |
+# | | | * D1 | 4 4 | 1 1 | 1 1 | good |
+# | | * | C3 | 10 8 | 1 1 | 1 1 | 1 1*|
+# | | * | C2 | 9 9 *| good | good | good |
+# | | * | C1 | 8 8 | good | good | good |
+# | * | | B3 | 8 8 | 3 3 | 1 1 | 1 1*|
+# * | | | Bmerge | 11 7 | 4 4*| good | good |
+# |\ \ \ \ | | | | |
+# | |/ / / | | | | |
+# | * | | B2 | 7 7 | 2 2 | good | good |
+# | * | | B1 | 6 6 | 1 1 | good | good |
+# * | | | A8 | 8 8 | 1 1 | good | good |
+# | |/ / | | | | |
+# |/| | | | | | |
+# * | | A7 | 7 7 | good | good | good |
+# * | | A6 | 6 6 | good | good | good |
+# |/ / | | | | |
+# * | A5 | 5 5 | good | good | good |
+# * | A4 | 4 4 | good | good | good |
+# |/ | | | | |
+# * A3 | 3 3 | good | good | good |
+# * A2 | 2 2 | good | good | good |
+# * A1 | 1 1 | good | good | good |
+
+test_expect_success 'bisect algorithm works with octopus merge' '
+ git bisect reset &&
+ git bisect start BCDmerge &&
+ git bisect next &&
+ test_cmp_rev HEAD C2 &&
+ git bisect good &&
+ test_cmp_rev HEAD Bmerge &&
+ git bisect good &&
+ test_cmp_rev HEAD D2 &&
+ git bisect good &&
+ test_cmp_rev HEAD B3 C3 &&
+ git bisect good &&
+ test_cmp_rev HEAD C3 B3 &&
+ git bisect good > output &&
+ grep "$(git rev-parse BCDmerge) is the first bad commit" output
+'
+
+# G 5a6bcdf D3 | w min | w min |
+# | B 02f2eed A9 | 14 0 | 7 0 |
+# | *---. 6174c5c BCDmerge | 13 1 | 6 1 |
+# | |\ \ \ | | |
+# | |_|_|/ | | |
+# |/| | | | | |
+# G | | | a6d6dab D2 | good | good |
+# * | | | 86414e4 D1 | good | good |
+# | | | * c672402 C3 | 7 7 *| good |
+# | | | * 0555272 C2 | 6 6 | good |
+# | | | * 28c2b2a C1 | 5 5 | good |
+# | | * | 4b5a7d9 B3 | 5 5 | 3 3 *|
+# | * | | a419ab7 Bmerge | 8 6 | 4 3 *|
+# | |\ \ \ | | |
+# | | |/ / | | |
+# | | * | 4fa1e39 B2 | 4 4 | 2 2 |
+# | | * | 92a014d B1 | 3 3 | 1 1 |
+# | * | | 79158c7 A8 | 5 5 | 1 1 |
+# | | |/ | | |
+# | |/| | | |
+# | * | 237eb73 A7 | 4 4 | good |
+# | * | 3b2f811 A6 | 3 3 | good |
+# | |/ | | |
+# | * 0f2b6d2 A5 | 2 2 | good |
+# | * 1fcdaf0 A4 | 1 1 | good |
+# |/ | | |
+# * 096648b A3 | good | good |
+# * 1cf01b8 A2 | good | good |
+# * 6623165 A1 | good | good |
+
+test_expect_success 'bisect algorithm works with good commit on unrelated branch' '
+ git bisect reset &&
+ git bisect start A9 D3 &&
+ test_cmp_rev HEAD "$(git merge-base A9 D3)" &&
+ test_cmp_rev HEAD D2 &&
+ git bisect good &&
+ test_cmp_rev HEAD C3 &&
+ git bisect good &&
+ test_cmp_rev HEAD B3 Bmerge
+'
+
+test_done
--
2.8.1.137.g522756c
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