diff options
Diffstat (limited to 'src/bytes/buffer_test.go')
| -rw-r--r-- | src/bytes/buffer_test.go | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/src/bytes/buffer_test.go b/src/bytes/buffer_test.go index 845e5e2209..322e7367c7 100644 --- a/src/bytes/buffer_test.go +++ b/src/bytes/buffer_test.go @@ -94,6 +94,21 @@ func TestNewBuffer(t *testing.T) { check(t, "NewBuffer", buf, testString) } +var buf Buffer + +// Calling NewBuffer and immediately shallow copying the Buffer struct +// should not result in any allocations. +// This can be used to reset the underlying []byte of an existing Buffer. +func TestNewBufferShallow(t *testing.T) { + n := testing.AllocsPerRun(1000, func() { + buf = *NewBuffer(testBytes) + }) + if n > 0 { + t.Errorf("allocations occurred while shallow copying") + } + check(t, "NewBuffer", &buf, testString) +} + func TestNewBufferString(t *testing.T) { buf := NewBufferString(testString) check(t, "NewBufferString", buf, testString) |