assert len > 0

2020-10-15 14:25:10 +08:00
parent 901fadb5d3
commit 8291eabc2c
4 changed files with 23 additions and 0 deletions
--- a/core/fx/fn_test.go
+++ b/core/fx/fn_test.go
@@ -294,6 +294,14 @@ func TestTail(t *testing.T) {
 	assert.Equal(t, 7, result)
 }

+func TestTailZero(t *testing.T) {
+	assert.Panics(t, func() {
+		Just(1, 2, 3, 4).Tail(0).Reduce(func(pipe <-chan interface{}) (interface{}, error) {
+			return nil, nil
+		})
+	})
+}
+
 func TestWalk(t *testing.T) {
 	var result int
 	Just(1, 2, 3, 4, 5).Walk(func(item interface{}, pipe chan<- interface{}) {