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package console
import (
"bytes"
"errors"
"io"
"testing"
"time"
)
func TestBuffer_Append(t *testing.T) {
b := new(buffer)
AssertZero(t, b.Len())
b.AppendString("foobar")
AssertEqual(t, 6, b.Len())
b.AppendString("baz")
AssertEqual(t, 9, b.Len())
AssertEqual(t, "foobarbaz", b.String())
b.AppendByte('.')
AssertEqual(t, 10, b.Len())
AssertEqual(t, "foobarbaz.", b.String())
b.AppendBool(true)
b.AppendBool(false)
b.AppendFloat(3.14)
b.AppendInt(42)
b.AppendUint(12)
b.Append([]byte("foo"))
b.AppendDuration(1 * time.Second)
now := time.Now()
b.AppendTime(now, time.RFC3339)
AssertEqual(t, "foobarbaz.truefalse3.144212foo1s"+now.Format(time.RFC3339), b.String())
}
func TestBuffer_WriteTo(t *testing.T) {
dest := bytes.Buffer{}
b := new(buffer)
n, err := b.WriteTo(&dest)
AssertNoError(t, err)
AssertZero(t, n)
b.AppendString("foobar")
n, err = b.WriteTo(&dest)
AssertEqual(t, len("foobar"), int(n))
AssertNoError(t, err)
AssertEqual(t, "foobar", dest.String())
AssertZero(t, b.Len())
}
func TestBuffer_Clone(t *testing.T) {
b := new(buffer)
b.AppendString("foobar")
b2 := b.Clone()
AssertEqual(t, b.String(), b2.String())
AssertNotEqual(t, &b.Bytes()[0], &b2.Bytes()[0])
}
func TestBuffer_Copy(t *testing.T) {
b := new(buffer)
b.AppendString("foobar")
b2 := new(buffer)
b2.copy(b)
AssertEqual(t, b.String(), b2.String())
AssertNotEqual(t, &b.Bytes()[0], &b2.Bytes()[0])
}
func TestBuffer_Reset(t *testing.T) {
b := new(buffer)
b.AppendString("foobar")
AssertEqual(t, "foobar", b.String())
AssertEqual(t, len("foobar"), b.Len())
bufCap := b.Cap()
b.Reset()
AssertZero(t, b.Len())
AssertEqual(t, bufCap, b.Cap())
}
func TestBuffer_Grow(t *testing.T) {
b := new(buffer)
AssertZero(t, b.Cap())
b.Grow(12)
AssertGreaterOrEqual(t, 12, b.Cap())
b.Grow(6)
AssertGreaterOrEqual(t, 12, b.Cap())
b.Grow(24)
AssertGreaterOrEqual(t, 24, b.Cap())
}
func TestBuffer_Clip(t *testing.T) {
b := new(buffer)
b.AppendString("foobar")
b.Grow(12)
AssertGreaterOrEqual(t, 12, b.Cap())
b.Clip()
AssertEqual(t, "foobar", b.String())
AssertEqual(t, len("foobar"), b.Cap())
}
func TestBuffer_WriteTo_Err(t *testing.T) {
w := writerFunc(func(b []byte) (int, error) { return 0, errors.New("nope") })
b := new(buffer)
b.AppendString("foobar")
_, err := b.WriteTo(w)
AssertError(t, err)
w = writerFunc(func(b []byte) (int, error) { return 0, nil })
_, err = b.WriteTo(w)
AssertError(t, err)
if !errors.Is(err, io.ErrShortWrite) {
t.Fatalf("Expected io.ErrShortWrite, go %T", err)
}
}
func BenchmarkBuffer(b *testing.B) {
data := []byte("foobarbaz")
b.Run("std", func(b *testing.B) {
buf := bytes.Buffer{}
for i := 0; i < b.N; i++ {
buf.Write(data)
buf.WriteByte('.')
buf.Reset()
}
})
b.Run("buffer", func(b *testing.B) {
buf := buffer{}
for i := 0; i < b.N; i++ {
buf.Append(data)
buf.AppendByte('.')
buf.Reset()
}
})
}
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