Signed-off-by: Tay Ray Chuan <rctay89@xxxxxxxxx>
---
t/t2018-checkout-branch.sh | 121 ++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 121 insertions(+), 0 deletions(-)
create mode 100755 t/t2018-checkout-branch.sh
diff --git a/t/t2018-checkout-branch.sh b/t/t2018-checkout-branch.sh
new file mode 100755
index 0000000..3c13065
--- /dev/null
+++ b/t/t2018-checkout-branch.sh
@@ -0,0 +1,121 @@
+#!/bin/sh
+
+test_description='checkout '
+
+. ./test-lib.sh
+
+# Arguments: <branch> <sha> [<checkout options>]
+#
+# Runs "git checkout" to switch to <branch>, testing that
+#
+# 1) we are on the specified branch, <branch>;
+# 2) HEAD is <sha>; if <sha> is not specified, the old HEAD is used.
+#
+# If <checkout options> is not specified, "git checkout" is run with -b.
+do_checkout() {
+ exp_branch=$1 &&
+ exp_ref="refs/heads/$exp_branch" &&
+
+ # if <sha> is not specified, use HEAD.
+ exp_sha=${2:-$(git rev-parse --verify HEAD)} &&
+
+ # default options for git checkout: -b
+ if [ -z "$3" ]; then
+ opts="-b"
+ else
+ opts="$3"
+ fi
+
+ git checkout $opts $exp_branch $exp_sha &&
+
+ test $exp_ref = $(git rev-parse --symbolic-full-name HEAD) &&
+ test $exp_sha = $(git rev-parse --verify HEAD)
+}
+
+test_dirty_unmergeable() {
+ ! git diff --exit-code >/dev/null
+}
+
+setup_dirty_unmergeable() {
+ echo >>file1 change2
+}
+
+test_dirty_mergeable() {
+ ! git diff --cached --exit-code >/dev/null
+}
+
+setup_dirty_mergeable() {
+ echo >file2 file2 &&
+ git add file2
+}
+
+test_expect_success 'setup' '
+ test_commit initial file1 &&
+ HEAD1=$(git rev-parse --verify HEAD) &&
+
+ test_commit change1 file1 &&
+ HEAD2=$(git rev-parse --verify HEAD) &&
+
+ git branch -m branch1
+'
+
+test_expect_success 'checkout -b to a new branch, set to HEAD' '
+ do_checkout branch2
+'
+
+test_expect_success 'checkout -b to a new branch, set to an explicit ref' '
+ git checkout branch1 &&
+ git branch -D branch2 &&
+
+ do_checkout branch2 $HEAD1
+'
+
+test_expect_success 'checkout -b to a new branch with unmergeable changes fails' '
+ git checkout branch1 &&
+
+ # clean up from previous test
+ git branch -D branch2 &&
+
+ setup_dirty_unmergeable &&
+ test_must_fail do_checkout branch2 $HEAD1 &&
+ test_dirty_unmergeable
+'
+
+test_expect_success 'checkout -f -b to a new branch with unmergeable changes discards changes' '
+ # still dirty and on branch1
+ do_checkout branch2 $HEAD1 "-f -b" &&
+ test_must_fail test_dirty_unmergeable
+'
+
+test_expect_success 'checkout -b to a new branch preserves mergeable changes' '
+ git checkout branch1 &&
+
+ # clean up from previous test
+ git branch -D branch2 &&
+
+ setup_dirty_mergeable &&
+ do_checkout branch2 $HEAD1 &&
+ test_dirty_mergeable
+'
+
+test_expect_success 'checkout -f -b to a new branch with mergeable changes discards changes' '
+ # clean up from previous test
+ git reset --hard &&
+
+ git checkout branch1 &&
+
+ # clean up from previous test
+ git branch -D branch2 &&
+
+ setup_dirty_mergeable &&
+ do_checkout branch2 $HEAD1 "-f -b" &&
+ test_must_fail test_dirty_mergeable
+'
+
+test_expect_success 'checkout -b to an existing branch fails' '
+ git reset --hard HEAD &&
+
+ test_must_fail do_checkout branch2 $HEAD2
+'
+
+test_done
--
1.7.1.513.g4f18
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