git/t/t6016-rev-list-graph-simpli...

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#!/bin/sh
# There's more than one "correct" way to represent the history graphically.
# These tests depend on the current behavior of the graphing code. If the
# graphing code is ever changed to draw the output differently, these tests
# cases will need to be updated to know about the new layout.
test_description='--graph and simplified history'
GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main
export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
. ./test-lib.sh
. "$TEST_DIRECTORY"/lib-log-graph.sh
check_graph () {
cat >expect &&
lib_test_cmp_graph --format=%s "$@"
}
test_expect_success 'set up rev-list --graph test' '
# 3 commits on branch A
test_commit A1 foo.txt &&
test_commit A2 bar.txt &&
test_commit A3 bar.txt &&
git branch -m main A &&
# 2 commits on branch B, started from A1
git checkout -b B A1 &&
test_commit B1 foo.txt &&
test_commit B2 abc.txt &&
# 2 commits on branch C, started from A2
git checkout -b C A2 &&
test_commit C1 xyz.txt &&
test_commit C2 xyz.txt &&
# Octopus merge B and C into branch A
git checkout A &&
git merge B C -m A4 &&
git tag A4 &&
test_commit A5 bar.txt &&
# More commits on C, then merge C into A
git checkout C &&
test_commit C3 foo.txt &&
test_commit C4 bar.txt &&
git checkout A &&
git merge -s ours C -m A6 &&
git tag A6 &&
test_commit A7 bar.txt
'
test_expect_success '--graph --all' '
check_graph --all <<-\EOF
* A7
* A6
|\
| * C4
| * C3
* | A5
| |
| \
*-. | A4
|\ \|
| | * C2
| | * C1
| * | B2
| * | B1
* | | A3
| |/
|/|
* | A2
|/
* A1
EOF
'
# Make sure the graph_is_interesting() code still realizes
# that undecorated merges are interesting, even with --simplify-by-decoration
test_expect_success '--graph --simplify-by-decoration' '
git tag -d A4 &&
check_graph --all --simplify-by-decoration <<-\EOF
* A7
* A6
|\
| * C4
| * C3
* | A5
| |
| \
*-. | A4
|\ \|
| | * C2
| | * C1
| * | B2
| * | B1
* | | A3
| |/
|/|
* | A2
|/
* A1
EOF
'
test_expect_success 'setup: get rid of decorations on B' '
git tag -d B2 &&
git tag -d B1 &&
git branch -d B
'
# Graph with branch B simplified away
test_expect_success '--graph --simplify-by-decoration prune branch B' '
check_graph --simplify-by-decoration --all <<-\EOF
* A7
* A6
|\
| * C4
| * C3
* | A5
* | A4
|\|
| * C2
| * C1
* | A3
|/
* A2
* A1
EOF
'
test_expect_success '--graph --full-history -- bar.txt' '
check_graph --full-history --all -- bar.txt <<-\EOF
* A7
* A6
|\
| * C4
* | A5
* | A4
|\|
* | A3
|/
* A2
EOF
'
test_expect_success '--graph --full-history --simplify-merges -- bar.txt' '
check_graph --full-history --simplify-merges --all -- bar.txt <<-\EOF
* A7
* A6
|\
| * C4
* | A5
* | A3
|/
* A2
EOF
'
test_expect_success '--graph -- bar.txt' '
check_graph --all -- bar.txt <<-\EOF
* A7
* A5
* A3
| * C4
|/
* A2
EOF
'
test_expect_success '--graph --sparse -- bar.txt' '
check_graph --sparse --all -- bar.txt <<-\EOF
* A7
* A6
* A5
* A4
* A3
| * C4
| * C3
| * C2
| * C1
|/
* A2
* A1
EOF
'
test_expect_success '--graph ^C4' '
check_graph --all ^C4 <<-\EOF
* A7
* A6
* A5
* A4
|\
| * B2
| * B1
* A3
EOF
'
test_expect_success '--graph ^C3' '
check_graph --all ^C3 <<-\EOF
* A7
* A6
|\
| * C4
* A5
* A4
|\
| * B2
| * B1
* A3
EOF
'
# I don't think the ordering of the boundary commits is really
# that important, but this test depends on it. If the ordering ever changes
# in the code, we'll need to update this test.
test_expect_success '--graph --boundary ^C3' '
check_graph --boundary --all ^C3 <<-\EOF
* A7
* A6
|\
| * C4
* | A5
| |
| \
*-. \ A4
|\ \ \
| * | | B2
| * | | B1
* | | | A3
o | | | A2
|/ / /
o / / A1
/ /
| o C3
|/
o C2
EOF
'
test_done