1 files changed, 138 insertions, 0 deletions
diff --git a/t/t2017-checkout-orphan.sh b/t/t2017-checkout-orphan.sh
new file mode 100755
index 0000000..947d158
--- /dev/null
+++ b/t/t2017-checkout-orphan.sh
@@ -0,0 +1,138 @@
+#!/bin/sh
+#
+# Copyright (c) 2010 Erick Mattos
+#
+
+test_description='git checkout --orphan
+
+Main Tests for --orphan functionality.'
+
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
+TEST_PASSES_SANITIZE_LEAK=true
+. ./test-lib.sh
+
+TEST_FILE=foo
+
+test_expect_success 'Setup' '
+	echo "Initial" >"$TEST_FILE" &&
+	git add "$TEST_FILE" &&
+	git commit -m "First Commit" &&
+	test_tick &&
+	echo "State 1" >>"$TEST_FILE" &&
+	git add "$TEST_FILE" &&
+	test_tick &&
+	git commit -m "Second Commit"
+'
+
+test_expect_success '--orphan creates a new orphan branch from HEAD' '
+	git checkout --orphan alpha &&
+	test_must_fail git rev-parse --verify HEAD &&
+	test "refs/heads/alpha" = "$(git symbolic-ref HEAD)" &&
+	test_tick &&
+	git commit -m "Third Commit" &&
+	test_must_fail git rev-parse --verify HEAD^ &&
+	git diff-tree --quiet main alpha
+'
+
+test_expect_success '--orphan creates a new orphan branch from <start_point>' '
+	git checkout main &&
+	git checkout --orphan beta main^ &&
+	test_must_fail git rev-parse --verify HEAD &&
+	test "refs/heads/beta" = "$(git symbolic-ref HEAD)" &&
+	test_tick &&
+	git commit -m "Fourth Commit" &&
+	test_must_fail git rev-parse --verify HEAD^ &&
+	git diff-tree --quiet main^ beta
+'
+
+test_expect_success '--orphan must be rejected with -b' '
+	git checkout main &&
+	test_must_fail git checkout --orphan new -b newer &&
+	test refs/heads/main = "$(git symbolic-ref HEAD)"
+'
+
+test_expect_success '--orphan must be rejected with -t' '
+	git checkout main &&
+	test_must_fail git checkout --orphan new -t main &&
+	test refs/heads/main = "$(git symbolic-ref HEAD)"
+'
+
+test_expect_success '--orphan ignores branch.autosetupmerge' '
+	git checkout main &&
+	git config branch.autosetupmerge always &&
+	git checkout --orphan gamma &&
+	test_cmp_config "" --default "" branch.gamma.merge &&
+	test refs/heads/gamma = "$(git symbolic-ref HEAD)" &&
+	test_must_fail git rev-parse --verify HEAD^ &&
+	git checkout main &&
+	git config branch.autosetupmerge inherit &&
+	git checkout --orphan eta &&
+	test_cmp_config "" --default "" branch.eta.merge &&
+	test_cmp_config "" --default "" branch.eta.remote &&
+	echo refs/heads/eta >expected &&
+	git symbolic-ref HEAD >actual &&
+	test_cmp expected actual &&
+	test_must_fail git rev-parse --verify HEAD^
+'
+
+test_expect_success '--orphan makes reflog by default' '
+	git checkout main &&
+	git config --unset core.logAllRefUpdates &&
+	git checkout --orphan delta &&
+	test_must_fail git rev-parse --verify delta@{0} &&
+	git commit -m Delta &&
+	git rev-parse --verify delta@{0}
+'
+
+test_expect_success REFFILES '--orphan does not make reflog when core.logAllRefUpdates = false' '
+	git checkout main &&
+	git config core.logAllRefUpdates false &&
+	git checkout --orphan epsilon &&
+	test_must_fail git rev-parse --verify epsilon@{0} &&
+	git commit -m Epsilon &&
+	test_must_fail git rev-parse --verify epsilon@{0}
+'
+
+test_expect_success '--orphan with -l makes reflog when core.logAllRefUpdates = false' '
+	git checkout main &&
+	git checkout -l --orphan zeta &&
+	test_must_fail git rev-parse --verify zeta@{0} &&
+	git commit -m Zeta &&
+	git rev-parse --verify zeta@{0}
+'
+
+test_expect_success 'giving up --orphan not committed when -l and core.logAllRefUpdates = false deletes reflog' '
+	git checkout main &&
+	git checkout -l --orphan eta &&
+	test_must_fail git rev-parse --verify eta@{0} &&
+	git checkout main &&
+	test_must_fail git rev-parse --verify eta@{0}
+'
+
+test_expect_success '--orphan is rejected with an existing name' '
+	git checkout main &&
+	test_must_fail git checkout --orphan main &&
+	test refs/heads/main = "$(git symbolic-ref HEAD)"
+'
+
+test_expect_success '--orphan refuses to switch if a merge is needed' '
+	git checkout main &&
+	git reset --hard &&
+	echo local >>"$TEST_FILE" &&
+	cat "$TEST_FILE" >"$TEST_FILE.saved" &&
+	test_must_fail git checkout --orphan new main^ &&
+	test refs/heads/main = "$(git symbolic-ref HEAD)" &&
+	test_cmp "$TEST_FILE" "$TEST_FILE.saved" &&
+	git diff-index --quiet --cached HEAD &&
+	git reset --hard
+'
+
+test_expect_success 'cannot --detach on an unborn branch' '
+	git checkout main &&
+	git checkout --orphan new &&
+	test_must_fail git checkout --detach
+'
+
+test_done