Carlos Florêncio
34 lines
700 B
Go
34 lines
700 B
Go
package launcher
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import (
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"bytes"
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"testing"
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)
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func TestLimitedBufferKeepsOnlyTail(t *testing.T) {
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buf := newLimitedBuffer(5)
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if _, err := buf.Write([]byte("hello")); err != nil {
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t.Fatal(err)
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}
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if _, err := buf.Write([]byte("world")); err != nil {
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t.Fatal(err)
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}
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if got := string(buf.Bytes()); got != "world" {
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t.Fatalf("buffer tail = %q, want world", got)
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}
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}
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func TestLimitedBufferBytesReturnsSnapshot(t *testing.T) {
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buf := newLimitedBuffer(10)
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if _, err := buf.Write([]byte("abc")); err != nil {
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t.Fatal(err)
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}
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snapshot := buf.Bytes()
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snapshot[0] = 'x'
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if !bytes.Equal(buf.Bytes(), []byte("abc")) {
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t.Fatalf("mutating snapshot changed buffer: %q", buf.Bytes())
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}
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}
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