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Diffstat (limited to 'src/strings/builder_test.go')
| -rw-r--r-- | src/strings/builder_test.go | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/src/strings/builder_test.go b/src/strings/builder_test.go index 949f214619..9e597015d8 100644 --- a/src/strings/builder_test.go +++ b/src/strings/builder_test.go @@ -20,6 +20,9 @@ func check(t *testing.T, b *Builder, want string) { if n := b.Len(); n != len(got) { t.Errorf("Len: got %d; but len(String()) is %d", n, len(got)) } + if n := b.Cap(); n < len(got) { + t.Errorf("Cap: got %d; but len(String()) is %d", n, len(got)) + } } func TestBuilder(t *testing.T) { @@ -89,6 +92,9 @@ func TestBuilderGrow(t *testing.T) { allocs := testing.AllocsPerRun(100, func() { var b Builder b.Grow(growLen) // should be only alloc, when growLen > 0 + if b.Cap() < growLen { + t.Fatalf("growLen=%d: Cap() is lower than growLen", growLen) + } b.Write(p) if b.String() != string(p) { t.Fatalf("growLen=%d: bad data written after Grow", growLen) @@ -227,6 +233,16 @@ func TestBuilderCopyPanic(t *testing.T) { }, }, { + name: "Cap", + wantPanic: false, + fn: func() { + var a Builder + a.WriteByte('x') + b := a + b.Cap() + }, + }, + { name: "Reset", wantPanic: false, fn: func() { |