1 files changed, 45 insertions, 0 deletions
diff --git a/third_party/git/t/t0101-at-syntax.sh b/third_party/git/t/t0101-at-syntax.sh
new file mode 100755
index 000000000000..a1998b558f96
--- /dev/null
+++ b/third_party/git/t/t0101-at-syntax.sh
@@ -0,0 +1,45 @@
+#!/bin/sh
+
+test_description='various @{whatever} syntax tests'
+. ./test-lib.sh
+
+test_expect_success 'setup' '
+	test_commit one &&
+	test_commit two
+'
+
+check_at() {
+	echo "$2" >expect &&
+	git log -1 --format=%s "$1" >actual &&
+	test_cmp expect actual
+}
+
+test_expect_success '@{0} shows current' '
+	check_at @{0} two
+'
+
+test_expect_success '@{1} shows old' '
+	check_at @{1} one
+'
+
+test_expect_success '@{now} shows current' '
+	check_at @{now} two
+'
+
+test_expect_success '@{2001-09-17} (before the first commit) shows old' '
+	check_at @{2001-09-17} one
+'
+
+test_expect_success 'silly approxidates work' '
+	check_at @{3.hot.dogs.on.2001-09-17} one
+'
+
+test_expect_success 'notice misspelled upstream' '
+	test_must_fail git log -1 --format=%s @{usptream}
+'
+
+test_expect_success 'complain about total nonsense' '
+	test_must_fail git log -1 --format=%s @{utter.bogosity}
+'
+
+test_done