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// Copyright 2020 Northern.tech AS
//
// 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 artifact
import (
"bytes"
"io"
"testing"
"github.com/stretchr/testify/assert"
)
func TestCompressorGzip(t *testing.T) {
c := NewCompressorGzip()
assert.Equal(t, c.GetFileExtension(), ".gz")
buf := bytes.NewBuffer(nil)
w, err := c.NewWriter(buf)
assert.NoError(t, err)
i, err := w.Write([]byte(testData))
assert.NoError(t, err)
assert.Equal(t, i, len(testData))
w.Close()
r, err := c.NewReader(buf)
assert.NoError(t, err)
rbuf := make([]byte, len(testData))
i, err = r.Read(rbuf)
assert.Equal(t, i, len(testData))
// It is perfectly valid for a reader to return nil on an exhaustive
// write when n-bytes read > 0
assert.True(t, err == io.EOF || err == nil)
assert.Equal(t, []byte(testData), rbuf)
// Second read must return zero bytes, and EOF though
i, err = r.Read(rbuf)
assert.Equal(t, err, io.EOF)
assert.Equal(t, i, 0)
}
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