slices: update doc for Delete and Replace

[gostls13.git] / src / slices / slices_test.go

diff --git a/src/slices/slices_test.go b/src/slices/slices_test.go
index 7d4fc34b2e6bdbae2d6c52e14d11ad1acf7023b6..2fc583ff909d048738d70590c55e94a4207770cd 100644 (file)
--- a/src/slices/slices_test.go
+++ b/src/slices/slices_test.go
@@ -659,6 +659,10 @@ func panics(f func()) (b bool) {
 }
 
 func TestDeletePanics(t *testing.T) {
+       s := []int{0, 1, 2, 3, 4}
+       s = s[0:2]
+       _ = s[0:4] // this is a valid slice of s
+
        for _, test := range []struct {
                name string
                s    []int
@@ -669,6 +673,7 @@ func TestDeletePanics(t *testing.T) {
                {"with out-of-bounds first index", []int{42}, 2, 3},
                {"with out-of-bounds second index", []int{42}, 0, 2},
                {"with invalid i>j", []int{42}, 1, 0},
+               {"s[i:j] is valid and j > len(s)", s, 0, 4},
        } {
                if !panics(func() { Delete(test.s, test.i, test.j) }) {
                        t.Errorf("Delete %s: got no panic, want panic", test.name)
@@ -928,6 +933,10 @@ func TestReplace(t *testing.T) {
 }
 
 func TestReplacePanics(t *testing.T) {
+       s := []int{0, 1, 2, 3, 4}
+       s = s[0:2]
+       _ = s[0:4] // this is a valid slice of s
+
        for _, test := range []struct {
                name string
                s, v []int
@@ -936,6 +945,7 @@ func TestReplacePanics(t *testing.T) {
                {"indexes out of order", []int{1, 2}, []int{3}, 2, 1},
                {"large index", []int{1, 2}, []int{3}, 1, 10},
                {"negative index", []int{1, 2}, []int{3}, -1, 2},
+               {"s[i:j] is valid and j > len(s)", s, nil, 0, 4},
        } {
                ss, vv := Clone(test.s), Clone(test.v)
                if !panics(func() { Replace(ss, test.i, test.j, vv...) }) {