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-rwxr-xr-xt/t4215-log-skewed-merges.sh373
1 files changed, 373 insertions, 0 deletions
diff --git a/t/t4215-log-skewed-merges.sh b/t/t4215-log-skewed-merges.sh
new file mode 100755
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--- /dev/null
+++ b/t/t4215-log-skewed-merges.sh
@@ -0,0 +1,373 @@
+#!/bin/sh
+
+test_description='git log --graph of skewed merges'
+
+. ./test-lib.sh
+. "$TEST_DIRECTORY"/lib-log-graph.sh
+
+check_graph () {
+ cat >expect &&
+ lib_test_cmp_graph --format=%s "$@"
+}
+
+test_expect_success 'log --graph with merge fusing with its left and right neighbors' '
+ git checkout --orphan _p &&
+ test_commit A &&
+ test_commit B &&
+ git checkout -b _q @^ && test_commit C &&
+ git checkout -b _r @^ && test_commit D &&
+ git checkout _p && git merge --no-ff _q _r -m E &&
+ git checkout _r && test_commit F &&
+ git checkout _p && git merge --no-ff _r -m G &&
+ git checkout @^^ && git merge --no-ff _p -m H &&
+
+ check_graph <<-\EOF
+ * H
+ |\
+ | * G
+ | |\
+ | | * F
+ | * | E
+ |/|\|
+ | | * D
+ | * | C
+ | |/
+ * / B
+ |/
+ * A
+ EOF
+'
+
+test_expect_success 'log --graph with left-skewed merge' '
+ git checkout --orphan 0_p && test_commit 0_A &&
+ git checkout -b 0_q 0_p && test_commit 0_B &&
+ git checkout -b 0_r 0_p &&
+ test_commit 0_C &&
+ test_commit 0_D &&
+ git checkout -b 0_s 0_p && test_commit 0_E &&
+ git checkout -b 0_t 0_p && git merge --no-ff 0_r^ 0_s -m 0_F &&
+ git checkout 0_p && git merge --no-ff 0_s -m 0_G &&
+ git checkout @^ && git merge --no-ff 0_q 0_r 0_t 0_p -m 0_H &&
+
+ check_graph <<-\EOF
+ *-----. 0_H
+ |\ \ \ \
+ | | | | * 0_G
+ | |_|_|/|
+ |/| | | |
+ | | | * | 0_F
+ | |_|/|\|
+ |/| | | |
+ | | | | * 0_E
+ | |_|_|/
+ |/| | |
+ | | * | 0_D
+ | | |/
+ | | * 0_C
+ | |/
+ |/|
+ | * 0_B
+ |/
+ * 0_A
+ EOF
+'
+
+test_expect_success 'log --graph with nested left-skewed merge' '
+ git checkout --orphan 1_p &&
+ test_commit 1_A &&
+ test_commit 1_B &&
+ test_commit 1_C &&
+ git checkout -b 1_q @^ && test_commit 1_D &&
+ git checkout 1_p && git merge --no-ff 1_q -m 1_E &&
+ git checkout -b 1_r @~3 && test_commit 1_F &&
+ git checkout 1_p && git merge --no-ff 1_r -m 1_G &&
+ git checkout @^^ && git merge --no-ff 1_p -m 1_H &&
+
+ check_graph <<-\EOF
+ * 1_H
+ |\
+ | * 1_G
+ | |\
+ | | * 1_F
+ | * | 1_E
+ |/| |
+ | * | 1_D
+ * | | 1_C
+ |/ /
+ * / 1_B
+ |/
+ * 1_A
+ EOF
+'
+
+test_expect_success 'log --graph with nested left-skewed merge following normal merge' '
+ git checkout --orphan 2_p &&
+ test_commit 2_A &&
+ test_commit 2_B &&
+ test_commit 2_C &&
+ git checkout -b 2_q @^^ &&
+ test_commit 2_D &&
+ test_commit 2_E &&
+ git checkout -b 2_r @^ && test_commit 2_F &&
+ git checkout 2_q &&
+ git merge --no-ff 2_r -m 2_G &&
+ git merge --no-ff 2_p^ -m 2_H &&
+ git checkout -b 2_s @^^ && git merge --no-ff 2_q -m 2_J &&
+ git checkout 2_p && git merge --no-ff 2_s -m 2_K &&
+
+ check_graph <<-\EOF
+ * 2_K
+ |\
+ | * 2_J
+ | |\
+ | | * 2_H
+ | | |\
+ | | * | 2_G
+ | |/| |
+ | | * | 2_F
+ | * | | 2_E
+ | |/ /
+ | * | 2_D
+ * | | 2_C
+ | |/
+ |/|
+ * | 2_B
+ |/
+ * 2_A
+ EOF
+'
+
+test_expect_success 'log --graph with nested right-skewed merge following left-skewed merge' '
+ git checkout --orphan 3_p &&
+ test_commit 3_A &&
+ git checkout -b 3_q &&
+ test_commit 3_B &&
+ test_commit 3_C &&
+ git checkout -b 3_r @^ &&
+ test_commit 3_D &&
+ git checkout 3_q && git merge --no-ff 3_r -m 3_E &&
+ git checkout 3_p && git merge --no-ff 3_q -m 3_F &&
+ git checkout 3_r && test_commit 3_G &&
+ git checkout 3_p && git merge --no-ff 3_r -m 3_H &&
+ git checkout @^^ && git merge --no-ff 3_p -m 3_J &&
+
+ check_graph <<-\EOF
+ * 3_J
+ |\
+ | * 3_H
+ | |\
+ | | * 3_G
+ | * | 3_F
+ |/| |
+ | * | 3_E
+ | |\|
+ | | * 3_D
+ | * | 3_C
+ | |/
+ | * 3_B
+ |/
+ * 3_A
+ EOF
+'
+
+test_expect_success 'log --graph with right-skewed merge following a left-skewed one' '
+ git checkout --orphan 4_p &&
+ test_commit 4_A &&
+ test_commit 4_B &&
+ test_commit 4_C &&
+ git checkout -b 4_q @^^ && test_commit 4_D &&
+ git checkout -b 4_r 4_p^ && git merge --no-ff 4_q -m 4_E &&
+ git checkout -b 4_s 4_p^^ &&
+ git merge --no-ff 4_r -m 4_F &&
+ git merge --no-ff 4_p -m 4_G &&
+ git checkout @^^ && git merge --no-ff 4_s -m 4_H &&
+
+ check_graph --date-order <<-\EOF
+ * 4_H
+ |\
+ | * 4_G
+ | |\
+ | * | 4_F
+ |/| |
+ | * | 4_E
+ | |\ \
+ | | * | 4_D
+ | |/ /
+ |/| |
+ | | * 4_C
+ | |/
+ | * 4_B
+ |/
+ * 4_A
+ EOF
+'
+
+test_expect_success 'log --graph with octopus merge with column joining its penultimate parent' '
+ git checkout --orphan 5_p &&
+ test_commit 5_A &&
+ git branch 5_q &&
+ git branch 5_r &&
+ test_commit 5_B &&
+ git checkout 5_q && test_commit 5_C &&
+ git checkout 5_r && test_commit 5_D &&
+ git checkout 5_p &&
+ git merge --no-ff 5_q 5_r -m 5_E &&
+ git checkout 5_q && test_commit 5_F &&
+ git checkout -b 5_s 5_p^ &&
+ git merge --no-ff 5_p 5_q -m 5_G &&
+ git checkout 5_r &&
+ git merge --no-ff 5_s -m 5_H &&
+
+ check_graph <<-\EOF
+ * 5_H
+ |\
+ | *-. 5_G
+ | |\ \
+ | | | * 5_F
+ | | * | 5_E
+ | |/|\ \
+ | |_|/ /
+ |/| | /
+ | | |/
+ * | | 5_D
+ | | * 5_C
+ | |/
+ |/|
+ | * 5_B
+ |/
+ * 5_A
+ EOF
+'
+
+test_expect_success 'log --graph with multiple tips' '
+ git checkout --orphan 6_1 &&
+ test_commit 6_A &&
+ git branch 6_2 &&
+ git branch 6_4 &&
+ test_commit 6_B &&
+ git branch 6_3 &&
+ test_commit 6_C &&
+ git checkout 6_2 && test_commit 6_D &&
+ git checkout 6_3 && test_commit 6_E &&
+ git checkout -b 6_5 6_1 &&
+ git merge --no-ff 6_2 -m 6_F &&
+ git checkout 6_4 && test_commit 6_G &&
+ git checkout 6_3 &&
+ git merge --no-ff 6_4 -m 6_H &&
+ git checkout 6_1 &&
+ git merge --no-ff 6_2 -m 6_I &&
+
+ check_graph 6_1 6_3 6_5 <<-\EOF
+ * 6_I
+ |\
+ | | * 6_H
+ | | |\
+ | | | * 6_G
+ | | * | 6_E
+ | | | | * 6_F
+ | |_|_|/|
+ |/| | |/
+ | | |/|
+ | |/| |
+ | * | | 6_D
+ | | |/
+ | |/|
+ * | | 6_C
+ | |/
+ |/|
+ * | 6_B
+ |/
+ * 6_A
+ EOF
+'
+
+test_expect_success 'log --graph with multiple tips and colors' '
+ test_config log.graphColors red,green,yellow,blue,magenta,cyan &&
+ cat >expect.colors <<-\EOF &&
+ * 6_I
+ <RED>|<RESET><GREEN>\<RESET>
+ <RED>|<RESET> <GREEN>|<RESET> * 6_H
+ <RED>|<RESET> <GREEN>|<RESET> <YELLOW>|<RESET><BLUE>\<RESET>
+ <RED>|<RESET> <GREEN>|<RESET> <YELLOW>|<RESET> * 6_G
+ <RED>|<RESET> <GREEN>|<RESET> <YELLOW>|<RESET> <BLUE>|<RESET> * 6_F
+ <RED>|<RESET> <GREEN>|<RESET><RED>_<RESET><YELLOW>|<RESET><RED>_<RESET><BLUE>|<RESET><RED>/<RESET><GREEN>|<RESET>
+ <RED>|<RESET><RED>/<RESET><GREEN>|<RESET> <YELLOW>|<RESET> <BLUE>|<RESET><GREEN>/<RESET>
+ <RED>|<RESET> <GREEN>|<RESET> <YELLOW>|<RESET><GREEN>/<RESET><BLUE>|<RESET>
+ <RED>|<RESET> <GREEN>|<RESET><GREEN>/<RESET><YELLOW>|<RESET> <BLUE>|<RESET>
+ <RED>|<RESET> <GREEN>|<RESET> * <BLUE>|<RESET> 6_E
+ <RED>|<RESET> * <CYAN>|<RESET> <BLUE>|<RESET> 6_D
+ <RED>|<RESET> <BLUE>|<RESET> <CYAN>|<RESET><BLUE>/<RESET>
+ <RED>|<RESET> <BLUE>|<RESET><BLUE>/<RESET><CYAN>|<RESET>
+ * <BLUE>|<RESET> <CYAN>|<RESET> 6_C
+ <CYAN>|<RESET> <BLUE>|<RESET><CYAN>/<RESET>
+ <CYAN>|<RESET><CYAN>/<RESET><BLUE>|<RESET>
+ * <BLUE>|<RESET> 6_B
+ <BLUE>|<RESET><BLUE>/<RESET>
+ * 6_A
+ EOF
+ lib_test_cmp_colored_graph --date-order --pretty=tformat:%s 6_1 6_3 6_5
+'
+
+test_expect_success 'log --graph with multiple tips' '
+ git checkout --orphan 7_1 &&
+ test_commit 7_A &&
+ test_commit 7_B &&
+ test_commit 7_C &&
+ git checkout -b 7_2 7_1~2 &&
+ test_commit 7_D &&
+ test_commit 7_E &&
+ git checkout -b 7_3 7_1~1 &&
+ test_commit 7_F &&
+ test_commit 7_G &&
+ git checkout -b 7_4 7_2~1 &&
+ test_commit 7_H &&
+ git checkout -b 7_5 7_1~2 &&
+ test_commit 7_I &&
+ git checkout -b 7_6 7_3~1 &&
+ test_commit 7_J &&
+ git checkout -b M_1 7_1 &&
+ git merge --no-ff 7_2 -m 7_M1 &&
+ git checkout -b M_3 7_3 &&
+ git merge --no-ff 7_4 -m 7_M2 &&
+ git checkout -b M_5 7_5 &&
+ git merge --no-ff 7_6 -m 7_M3 &&
+ git checkout -b M_7 7_1 &&
+ git merge --no-ff 7_2 7_3 -m 7_M4 &&
+
+ check_graph M_1 M_3 M_5 M_7 <<-\EOF
+ * 7_M1
+ |\
+ | | * 7_M2
+ | | |\
+ | | | * 7_H
+ | | | | * 7_M3
+ | | | | |\
+ | | | | | * 7_J
+ | | | | * | 7_I
+ | | | | | | * 7_M4
+ | |_|_|_|_|/|\
+ |/| | | | |/ /
+ | | |_|_|/| /
+ | |/| | | |/
+ | | | |_|/|
+ | | |/| | |
+ | | * | | | 7_G
+ | | | |_|/
+ | | |/| |
+ | | * | | 7_F
+ | * | | | 7_E
+ | | |/ /
+ | |/| |
+ | * | | 7_D
+ | | |/
+ | |/|
+ * | | 7_C
+ | |/
+ |/|
+ * | 7_B
+ |/
+ * 7_A
+ EOF
+'
+
+test_done