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// Copyright 2020 Google LLC All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package gzip
import (
"bytes"
"fmt"
"io"
"strings"
"testing"
)
func TestReader(t *testing.T) {
want := "This is the input string."
buf := bytes.NewBufferString(want)
zipped := ReadCloser(io.NopCloser(buf))
unzipped, err := UnzipReadCloser(zipped)
if err != nil {
t.Error("UnzipReadCloser() =", err)
}
b, err := io.ReadAll(unzipped)
if err != nil {
t.Error("ReadAll() =", err)
}
if got := string(b); got != want {
t.Errorf("ReadAll(); got %q, want %q", got, want)
}
if err := unzipped.Close(); err != nil {
t.Error("Close() =", err)
}
}
func TestIs(t *testing.T) {
tests := []struct {
in []byte
out bool
err error
}{
{[]byte{}, false, nil},
{[]byte{'\x00', '\x00', '\x00'}, false, nil},
{[]byte{'\x1f', '\x8b', '\x1b'}, true, nil},
}
for _, test := range tests {
reader := bytes.NewReader(test.in)
got, err := Is(reader)
if got != test.out {
t.Errorf("Is; n: got %v, wanted %v\n", got, test.out)
}
if err != test.err {
t.Errorf("Is; err: got %v, wanted %v\n", err, test.err)
}
}
}
var (
errRead = fmt.Errorf("Read failed")
)
type failReader struct{}
func (f failReader) Read(_ []byte) (int, error) {
return 0, errRead
}
func TestReadErrors(t *testing.T) {
fr := failReader{}
if _, err := Is(fr); err != errRead {
t.Error("Is: expected errRead, got", err)
}
frc := io.NopCloser(fr)
if _, err := UnzipReadCloser(frc); err != errRead {
t.Error("UnzipReadCloser: expected errRead, got", err)
}
zr := ReadCloser(io.NopCloser(fr))
if _, err := zr.Read(nil); err != errRead {
t.Error("ReadCloser: expected errRead, got", err)
}
zr = ReadCloserLevel(io.NopCloser(strings.NewReader("zip me")), -10)
if _, err := zr.Read(nil); err == nil {
t.Error("Expected invalid level error, got:", err)
}
}
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