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#!/bin/sh
test_description='behavior of diff with symmetric-diff setups and --merge-base'
GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main
export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
. ./test-lib.sh
# build these situations:
# - normal merge with one merge base (br1...b2r);
# - criss-cross merge ie 2 merge bases (br1...main);
# - disjoint subgraph (orphan branch, br3...main).
#
# B---E <-- main
# / \ /
# A X
# \ / \
# C---D--G <-- br1
# \ /
# ---F <-- br2
#
# H <-- br3
#
# We put files into a few commits so that we can verify the
# output as well.
test_expect_success setup '
git commit --allow-empty -m A &&
echo b >b &&
git add b &&
git commit -m B &&
git checkout -b br1 HEAD^ &&
echo c >c &&
git add c &&
git commit -m C &&
git tag -m commit-C commit-C &&
git merge -m D main &&
git tag commit-D &&
git checkout main &&
git merge -m E commit-C &&
git checkout -b br2 commit-C &&
echo f >f &&
git add f &&
git commit -m F &&
git checkout br1 &&
git merge -m G br2 &&
git checkout --orphan br3 &&
git commit -m H
'
test_expect_success 'diff with one merge base' '
git diff commit-D...br1 >tmp &&
tail -n 1 tmp >actual &&
echo +f >expect &&
test_cmp expect actual
'
# The output (in tmp) can have +b or +c depending
# on which merge base (commit B or C) is picked.
# It should have one of those two, which comes out
# to seven lines.
test_expect_success 'diff with two merge bases' '
git diff br1...main >tmp 2>err &&
test_line_count = 7 tmp &&
test_line_count = 1 err
'
test_expect_success 'diff with no merge bases' '
test_must_fail git diff br2...br3 2>err &&
test_grep "fatal: br2...br3: no merge base" err
'
test_expect_success 'diff with too many symmetric differences' '
test_must_fail git diff br1...main br2...br3 2>err &&
test_grep "usage" err
'
test_expect_success 'diff with symmetric difference and extraneous arg' '
test_must_fail git diff main br1...main 2>err &&
test_grep "usage" err
'
test_expect_success 'diff with two ranges' '
test_must_fail git diff main br1..main br2..br3 2>err &&
test_grep "usage" err
'
test_expect_success 'diff with ranges and extra arg' '
test_must_fail git diff main br1..main commit-D 2>err &&
test_grep "usage" err
'
test_expect_success 'diff --merge-base with no commits' '
test_must_fail git diff --merge-base
'
test_expect_success 'diff --merge-base with three commits' '
test_must_fail git diff --merge-base br1 br2 main 2>err &&
test_grep "usage" err
'
for cmd in diff-index diff
do
test_expect_success "$cmd --merge-base with one commit" '
git checkout main &&
git $cmd commit-C >expect &&
git $cmd --merge-base br2 >actual &&
test_cmp expect actual
'
test_expect_success "$cmd --merge-base with annotated tag" '
git checkout main &&
git $cmd commit-C >expect &&
git $cmd --merge-base commit-C >actual &&
test_cmp expect actual
'
test_expect_success "$cmd --merge-base with one commit and unstaged changes" '
git checkout main &&
test_when_finished git reset --hard &&
echo unstaged >>c &&
git $cmd commit-C >expect &&
git $cmd --merge-base br2 >actual &&
test_cmp expect actual
'
test_expect_success "$cmd --merge-base with one commit and staged and unstaged changes" '
git checkout main &&
test_when_finished git reset --hard &&
echo staged >>c &&
git add c &&
echo unstaged >>c &&
git $cmd commit-C >expect &&
git $cmd --merge-base br2 >actual &&
test_cmp expect actual
'
test_expect_success "$cmd --merge-base --cached with one commit and staged and unstaged changes" '
git checkout main &&
test_when_finished git reset --hard &&
echo staged >>c &&
git add c &&
echo unstaged >>c &&
git $cmd --cached commit-C >expect &&
git $cmd --cached --merge-base br2 >actual &&
test_cmp expect actual
'
test_expect_success "$cmd --merge-base with non-commit" '
git checkout main &&
test_must_fail git $cmd --merge-base main^{tree} 2>err &&
test_grep "is a tree, not a commit" err
'
test_expect_success "$cmd --merge-base with no merge bases and one commit" '
git checkout main &&
test_must_fail git $cmd --merge-base br3 2>err &&
test_grep "fatal: no merge base found" err
'
test_expect_success "$cmd --merge-base with multiple merge bases and one commit" '
git checkout main &&
test_must_fail git $cmd --merge-base br1 2>err &&
test_grep "fatal: multiple merge bases found" err
'
done
for cmd in diff-tree diff
do
test_expect_success "$cmd --merge-base with two commits" '
git $cmd commit-C main >expect &&
git $cmd --merge-base br2 main >actual &&
test_cmp expect actual
'
test_expect_success "$cmd --merge-base commit and non-commit" '
test_must_fail git $cmd --merge-base br2 main^{tree} 2>err &&
test_grep "is a tree, not a commit" err
'
test_expect_success "$cmd --merge-base with no merge bases and two commits" '
test_must_fail git $cmd --merge-base br2 br3 2>err &&
test_grep "fatal: no merge base found" err
'
test_expect_success "$cmd --merge-base with multiple merge bases and two commits" '
test_must_fail git $cmd --merge-base main br1 2>err &&
test_grep "fatal: multiple merge bases found" err
'
done
test_expect_success 'diff-tree --merge-base with one commit' '
test_must_fail git diff-tree --merge-base main 2>err &&
test_grep "fatal: --merge-base only works with two commits" err
'
test_expect_success 'diff --merge-base with range' '
test_must_fail git diff --merge-base br2..br3 2>err &&
test_grep "fatal: --merge-base does not work with ranges" err
'
test_done
|
