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50 lines
1.2 KiB
Go
50 lines
1.2 KiB
Go
package buffer // import "github.com/tdewolff/parse/buffer"
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import (
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"bytes"
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"fmt"
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"io"
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"testing"
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"github.com/tdewolff/test"
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)
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func TestReader(t *testing.T) {
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s := []byte("abcde")
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r := NewReader(s)
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test.Bytes(t, r.Bytes(), s, "reader must return bytes stored")
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buf := make([]byte, 3)
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n, err := r.Read(buf)
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test.T(t, err, nil, "error")
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test.That(t, n == 3, "first read must read 3 characters")
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test.Bytes(t, buf, []byte("abc"), "first read must match 'abc'")
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n, err = r.Read(buf)
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test.T(t, err, nil, "error")
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test.That(t, n == 2, "second read must read 2 characters")
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test.Bytes(t, buf[:n], []byte("de"), "second read must match 'de'")
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n, err = r.Read(buf)
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test.T(t, err, io.EOF, "error")
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test.That(t, n == 0, "third read must read 0 characters")
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n, err = r.Read(nil)
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test.T(t, err, nil, "error")
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test.That(t, n == 0, "read to nil buffer must return 0 characters read")
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r.Reset()
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n, err = r.Read(buf)
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test.T(t, err, nil, "error")
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test.That(t, n == 3, "read after reset must read 3 characters")
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test.Bytes(t, buf, []byte("abc"), "read after reset must match 'abc'")
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}
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func ExampleNewReader() {
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r := NewReader([]byte("Lorem ipsum"))
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w := &bytes.Buffer{}
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io.Copy(w, r)
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fmt.Println(w.String())
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// Output: Lorem ipsum
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}
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