merge-tree: accept 3 trees as arguments

[git.git] / t / t6016-rev-list-graph-simplify-history.sh

#!/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