diff options
Diffstat (limited to 'src/strings')
| -rw-r--r-- | src/strings/builder_test.go | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/src/strings/builder_test.go b/src/strings/builder_test.go index e3d239266f..dbc2c1943b 100644 --- a/src/strings/builder_test.go +++ b/src/strings/builder_test.go @@ -109,6 +109,15 @@ func TestBuilderGrow(t *testing.T) { t.Errorf("growLen=%d: got %d allocs during Write; want %v", growLen, g, w) } } + // when growLen < 0, should panic + var a Builder + n := -1 + defer func() { + if r := recover(); r == nil { + t.Errorf("a.Grow(%d) should panic()", n) + } + }() + a.Grow(n) } func TestBuilderWrite2(t *testing.T) { |