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Diffstat (limited to 't/t4068-diff-symmetric-merge-base.sh')
| -rwxr-xr-x | t/t4068-diff-symmetric-merge-base.sh | 196 |
1 files changed, 196 insertions, 0 deletions
diff --git a/t/t4068-diff-symmetric-merge-base.sh b/t/t4068-diff-symmetric-merge-base.sh new file mode 100755 index 0000000000..2d650d8f10 --- /dev/null +++ b/t/t4068-diff-symmetric-merge-base.sh @@ -0,0 +1,196 @@ +#!/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 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_i18ngrep "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_i18ngrep "usage" err +' + +test_expect_success 'diff with symmetric difference and extraneous arg' ' + test_must_fail git diff main br1...main 2>err && + test_i18ngrep "usage" err +' + +test_expect_success 'diff with two ranges' ' + test_must_fail git diff main br1..main br2..br3 2>err && + test_i18ngrep "usage" err +' + +test_expect_success 'diff with ranges and extra arg' ' + test_must_fail git diff main br1..main commit-D 2>err && + test_i18ngrep "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_i18ngrep "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 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 $cmd --merge-base main^{tree} 2>err && + test_i18ngrep "fatal: --merge-base only works with commits" err + ' + + test_expect_success "$cmd --merge-base with no merge bases and one commit" ' + git checkout main && + test_must_fail git $cmd --merge-base br3 2>err && + test_i18ngrep "fatal: no merge base found" err + ' + + test_expect_success "$cmd --merge-base with multiple merge bases and one commit" ' + git checkout main && + test_must_fail git $cmd --merge-base br1 2>err && + test_i18ngrep "fatal: multiple merge bases found" err + ' +done + +for cmd in diff-tree diff +do + test_expect_success "$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 $cmd --merge-base br2 main^{tree} 2>err && + test_i18ngrep "fatal: --merge-base only works with commits" err + ' + + test_expect_success "$cmd --merge-base with no merge bases and two commits" ' + test_must_fail git $cmd --merge-base br2 br3 2>err && + test_i18ngrep "fatal: no merge base found" err + ' + + test_expect_success "$cmd --merge-base with multiple merge bases and two commits" ' + test_must_fail git $cmd --merge-base main br1 2>err && + test_i18ngrep "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_i18ngrep "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_i18ngrep "fatal: --merge-base does not work with ranges" err +' + +test_done |