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/*
* Minio Cloud Storage, (C) 2016 Minio, Inc.
*
* 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 cmd
import (
"bytes"
"errors"
"io"
"testing"
)
// Test validates the number hash writers returned.
func TestNewHashWriters(t *testing.T) {
diskNum := 8
hashWriters := newHashWriters(diskNum, bitRotAlgo)
if len(hashWriters) != diskNum {
t.Errorf("Expected %d hashWriters, but instead got %d", diskNum, len(hashWriters))
}
}
// Tests validate the output of getChunkSize.
func TestGetChunkSize(t *testing.T) {
// Refer to comments on getChunkSize() for details.
testCases := []struct {
blockSize int64
dataBlocks int
// expected result.
expectedChunkSize int64
}{
{
10,
10,
1,
},
{
10,
11,
1,
},
{
10,
9,
2,
},
}
// Verify getChunkSize() for the test cases.
for i, testCase := range testCases {
got := getChunkSize(testCase.blockSize, testCase.dataBlocks)
if testCase.expectedChunkSize != got {
t.Errorf("Test %d : expected=%d got=%d", i+1, testCase.expectedChunkSize, got)
}
}
}
// TestCopyBuffer - Tests validate the result and errors produced when `copyBuffer` is called with sample inputs.
func TestCopyBuffer(t *testing.T) {
// create posix test setup
disk, diskPath, err := newPosixTestSetup()
if err != nil {
t.Fatalf("Unable to create posix test setup, %s", err)
}
defer removeAll(diskPath)
volume := "success-vol"
// Setup test environment.
if err = disk.MakeVol(volume); err != nil {
t.Fatalf("Unable to create volume, %s", err)
}
// creating io.Writer for the input to copyBuffer.
buffers := []*bytes.Buffer{
new(bytes.Buffer),
new(bytes.Buffer),
new(bytes.Buffer),
}
testFile := "testFile"
testContent := []byte("hello, world")
err = disk.AppendFile(volume, testFile, testContent)
if err != nil {
t.Fatalf("AppendFile failed: <ERROR> %s", err)
}
testCases := []struct {
writer io.Writer
disk StorageAPI
volume string
path string
buf []byte
670D
expectedResult []byte
// flag to indicate whether test case should pass.
shouldPass bool
expectedErr error
}{
// Test case - 1.
// case with empty buffer.
{nil, nil, "", "", []byte{}, nil, false, errors.New("empty buffer in readBuffer")},
// Test case - 2.
// Test case with empty volume.
{buffers[0], disk, "", "", make([]byte, 5), nil, false, errInvalidArgument},
// Test case - 3.
// Test case with non existent volume.
{buffers[0], disk, "abc", "", make([]byte, 5), nil, false, errVolumeNotFound},
// Test case - 4.
// Test case with empty filename/path.
{buffers[0], disk, volume, "", make([]byte, 5), nil, false, errIsNotRegular},
// Test case - 5.
// Test case with non existent file name.
{buffers[0], disk, volume, "abcd", make([]byte, 5), nil, false, errFileNotFound},
// Test case - 6.
// Test case where the writer returns EOF.
{NewEOFWriter(buffers[0], 3), disk, volume, testFile, make([]byte, 5), nil, false, io.EOF},
// Test case - 7.
// Test case to produce io.ErrShortWrite, the TruncateWriter returns after writing 3 bytes.
{TruncateWriter(buffers[1], 3), disk, volume, testFile, make([]byte, 5), nil, false, io.ErrShortWrite},
// Teset case - 8.
// Valid case, expected to read till EOF and write the contents into the writer.
{buffers[2], disk, volume, testFile, make([]byte, 5), testContent, true, nil},
}
// iterate over the test cases and call copy Buffer with data.
for i, testCase := range testCases {
actualErr := copyBuffer(testCase.writer, testCase.disk, testCase.volume, testCase.path, testCase.buf)
if actualErr != nil && testCase.shouldPass {
t.Errorf("Test %d: Expected to pass but failed instead with \"%s\"", i+1, actualErr)
}
if actualErr == nil && !testCase.shouldPass {
t.Errorf("Test %d: Expected to fail with error <Error> \"%v\", but instead passed", i+1, testCase.expectedErr)
}
// Failed as expected, but does it fail for the expected reason.
if actualErr != nil && !testCase.shouldPass {
if testCase.expectedErr.Error() != actualErr.Error() {
t.Errorf("Test %d: Expected Error to be \"%v\", but instead found \"%v\" ", i+1, testCase.expectedErr, actualErr)
}
}
// test passed as expected, asserting the result.
if actualErr == nil && testCase.shouldPass {
if !bytes.Equal(testCase.expectedResult, buffers[2].Bytes()) {
t.Errorf("Test %d: copied buffer differs from the expected one.", i+1)
}
}
}
}