general improvements

diff --git a/t/t2018-checkout-branch.sh b/t/t2018-checkout-branch.sh
index f1c7023e1ad51ca8bc3a3cf0dc6eeaa3a8f18dff..822381dd9df67f7a392e7697c21d9aade2eb56e1 100755 (executable)
--- a/t/t2018-checkout-branch.sh
+++ b/t/t2018-checkout-branch.sh
@@ -66,6 +66,13 @@ test_expect_success 'checkout -b to a new branch, set to HEAD' '
        do_checkout branch2
 '
 
+test_expect_success 'checkout -b to a merge base' '
+       test_when_finished "
+               git checkout branch1 &&
+               test_might_fail git branch -D branch2" &&
+       git checkout -b branch2 branch1...
+'
+
 test_expect_success 'checkout -b to a new branch, set to an explicit ref' '
        test_when_finished "
                git checkout branch1 &&
@@ -126,6 +133,12 @@ test_expect_success 'checkout -B to an existing branch resets branch to HEAD' '
        do_checkout branch2 "" -B
 '
 
+test_expect_success 'checkout -B to a merge base' '
+       git checkout branch1 &&
+
+       git checkout -B branch2 branch1...
+'
+
 test_expect_success 'checkout -B to an existing branch from detached HEAD resets branch to HEAD' '
        git checkout $(git rev-parse --verify HEAD) &&