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-rwxr-xr-xt/t3033-merge-toplevel.sh152
1 files changed, 152 insertions, 0 deletions
diff --git a/t/t3033-merge-toplevel.sh b/t/t3033-merge-toplevel.sh
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+++ b/t/t3033-merge-toplevel.sh
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+#!/bin/sh
+
+test_description='"git merge" top-level frontend'
+
+. ./test-lib.sh
+
+t3033_reset () {
+ git checkout -B master two &&
+ git branch -f left three &&
+ git branch -f right four
+}
+
+test_expect_success setup '
+ test_commit one &&
+ git branch left &&
+ git branch right &&
+ test_commit two &&
+ git checkout left &&
+ test_commit three &&
+ git checkout right &&
+ test_commit four &&
+ git checkout --orphan newroot &&
+ test_commit five &&
+ git checkout master
+'
+
+# Local branches
+
+test_expect_success 'merge an octopus into void' '
+ t3033_reset &&
+ git checkout --orphan test &&
+ git rm -fr . &&
+ test_must_fail git merge left right &&
+ test_must_fail git rev-parse --verify HEAD &&
+ git diff --quiet &&
+ test_must_fail git rev-parse HEAD
+'
+
+test_expect_success 'merge an octopus, fast-forward (ff)' '
+ t3033_reset &&
+ git reset --hard one &&
+ git merge left right &&
+ # one is ancestor of three (left) and four (right)
+ test_must_fail git rev-parse --verify HEAD^3 &&
+ git rev-parse HEAD^1 HEAD^2 | sort >actual &&
+ git rev-parse three four | sort >expect &&
+ test_cmp expect actual
+'
+
+test_expect_success 'merge octopus, non-fast-forward (ff)' '
+ t3033_reset &&
+ git reset --hard one &&
+ git merge --no-ff left right &&
+ # one is ancestor of three (left) and four (right)
+ test_must_fail git rev-parse --verify HEAD^4 &&
+ git rev-parse HEAD^1 HEAD^2 HEAD^3 | sort >actual &&
+ git rev-parse one three four | sort >expect &&
+ test_cmp expect actual
+'
+
+test_expect_success 'merge octopus, fast-forward (does not ff)' '
+ t3033_reset &&
+ git merge left right &&
+ # two (master) is not an ancestor of three (left) and four (right)
+ test_must_fail git rev-parse --verify HEAD^4 &&
+ git rev-parse HEAD^1 HEAD^2 HEAD^3 | sort >actual &&
+ git rev-parse two three four | sort >expect &&
+ test_cmp expect actual
+'
+
+test_expect_success 'merge octopus, non-fast-forward' '
+ t3033_reset &&
+ git merge --no-ff left right &&
+ test_must_fail git rev-parse --verify HEAD^4 &&
+ git rev-parse HEAD^1 HEAD^2 HEAD^3 | sort >actual &&
+ git rev-parse two three four | sort >expect &&
+ test_cmp expect actual
+'
+
+# The same set with FETCH_HEAD
+
+test_expect_success 'merge FETCH_HEAD octopus into void' '
+ t3033_reset &&
+ git checkout --orphan test &&
+ git rm -fr . &&
+ git fetch . left right &&
+ test_must_fail git merge FETCH_HEAD &&
+ test_must_fail git rev-parse --verify HEAD &&
+ git diff --quiet &&
+ test_must_fail git rev-parse HEAD
+'
+
+test_expect_success 'merge FETCH_HEAD octopus fast-forward (ff)' '
+ t3033_reset &&
+ git reset --hard one &&
+ git fetch . left right &&
+ git merge FETCH_HEAD &&
+ # one is ancestor of three (left) and four (right)
+ test_must_fail git rev-parse --verify HEAD^3 &&
+ git rev-parse HEAD^1 HEAD^2 | sort >actual &&
+ git rev-parse three four | sort >expect &&
+ test_cmp expect actual
+'
+
+test_expect_success 'merge FETCH_HEAD octopus non-fast-forward (ff)' '
+ t3033_reset &&
+ git reset --hard one &&
+ git fetch . left right &&
+ git merge --no-ff FETCH_HEAD &&
+ # one is ancestor of three (left) and four (right)
+ test_must_fail git rev-parse --verify HEAD^4 &&
+ git rev-parse HEAD^1 HEAD^2 HEAD^3 | sort >actual &&
+ git rev-parse one three four | sort >expect &&
+ test_cmp expect actual
+'
+
+test_expect_success 'merge FETCH_HEAD octopus fast-forward (does not ff)' '
+ t3033_reset &&
+ git fetch . left right &&
+ git merge FETCH_HEAD &&
+ # two (master) is not an ancestor of three (left) and four (right)
+ test_must_fail git rev-parse --verify HEAD^4 &&
+ git rev-parse HEAD^1 HEAD^2 HEAD^3 | sort >actual &&
+ git rev-parse two three four | sort >expect &&
+ test_cmp expect actual
+'
+
+test_expect_success 'merge FETCH_HEAD octopus non-fast-forward' '
+ t3033_reset &&
+ git fetch . left right &&
+ git merge --no-ff FETCH_HEAD &&
+ test_must_fail git rev-parse --verify HEAD^4 &&
+ git rev-parse HEAD^1 HEAD^2 HEAD^3 | sort >actual &&
+ git rev-parse two three four | sort >expect &&
+ test_cmp expect actual
+'
+
+# two-project merge
+test_expect_success 'refuse two-project merge by default' '
+ t3033_reset &&
+ git reset --hard four &&
+ test_must_fail git merge five
+'
+
+test_expect_success 'two-project merge with --allow-unrelated-histories' '
+ t3033_reset &&
+ git reset --hard four &&
+ git merge --allow-unrelated-histories five &&
+ git diff --exit-code five
+'
+
+test_done