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161 lines
4.8 KiB
161 lines
4.8 KiB
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8 years ago
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/*
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* Minio Cloud Storage, (C) 2016 Minio, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package cmd
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import (
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"bytes"
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"errors"
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"io"
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"testing"
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)
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// Test validates the number hash writers returned.
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func TestNewHashWriters(t *testing.T) {
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diskNum := 8
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hashWriters := newHashWriters(diskNum, bitRotAlgo)
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if len(hashWriters) != diskNum {
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t.Errorf("Expected %d hashWriters, but instead got %d", diskNum, len(hashWriters))
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}
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}
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// Tests validate the output of getChunkSize.
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func TestGetChunkSize(t *testing.T) {
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// Refer to comments on getChunkSize() for details.
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testCases := []struct {
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blockSize int64
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dataBlocks int
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// expected result.
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expectedChunkSize int64
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}{
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{
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10,
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10,
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1,
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},
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{
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10,
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11,
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1,
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},
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{
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10,
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9,
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2,
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},
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}
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// Verify getChunkSize() for the test cases.
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for i, testCase := range testCases {
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got := getChunkSize(testCase.blockSize, testCase.dataBlocks)
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if testCase.expectedChunkSize != got {
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t.Errorf("Test %d : expected=%d got=%d", i+1, testCase.expectedChunkSize, got)
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}
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}
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}
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// TestCopyBuffer - Tests validate the result and errors produced when `copyBuffer` is called with sample inputs.
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func TestCopyBuffer(t *testing.T) {
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// create posix test setup
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disk, diskPath, err := newPosixTestSetup()
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if err != nil {
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t.Fatalf("Unable to create posix test setup, %s", err)
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}
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defer removeAll(diskPath)
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volume := "success-vol"
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// Setup test environment.
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if err = disk.MakeVol(volume); err != nil {
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t.Fatalf("Unable to create volume, %s", err)
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}
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// creating io.Writer for the input to copyBuffer.
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buffers := []*bytes.Buffer{
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new(bytes.Buffer),
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new(bytes.Buffer),
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new(bytes.Buffer),
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}
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testFile := "testFile"
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testContent := []byte("hello, world")
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err = disk.AppendFile(volume, testFile, testContent)
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if err != nil {
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t.Fatalf("AppendFile failed: <ERROR> %s", err)
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}
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testCases := []struct {
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writer io.Writer
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disk StorageAPI
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volume string
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path string
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buf []byte
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expectedResult []byte
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// flag to indicate whether test case should pass.
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shouldPass bool
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expectedErr error
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}{
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// Test case - 1.
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// case with empty buffer.
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{nil, nil, "", "", []byte{}, nil, false, errors.New("empty buffer in readBuffer")},
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// Test case - 2.
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// Test case with empty volume.
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{buffers[0], disk, "", "", make([]byte, 5), nil, false, errInvalidArgument},
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// Test case - 3.
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// Test case with non existent volume.
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{buffers[0], disk, "abc", "", make([]byte, 5), nil, false, errVolumeNotFound},
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// Test case - 4.
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// Test case with empty filename/path.
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{buffers[0], disk, volume, "", make([]byte, 5), nil, false, errIsNotRegular},
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// Test case - 5.
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// Test case with non existent file name.
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{buffers[0], disk, volume, "abcd", make([]byte, 5), nil, false, errFileNotFound},
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// Test case - 6.
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// Test case where the writer returns EOF.
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{NewEOFWriter(buffers[0], 3), disk, volume, testFile, make([]byte, 5), nil, false, io.EOF},
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// Test case - 7.
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// Test case to produce io.ErrShortWrite, the TruncateWriter returns after writing 3 bytes.
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{TruncateWriter(buffers[1], 3), disk, volume, testFile, make([]byte, 5), nil, false, io.ErrShortWrite},
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// Teset case - 8.
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// Valid case, expected to read till EOF and write the contents into the writer.
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{buffers[2], disk, volume, testFile, make([]byte, 5), testContent, true, nil},
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}
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// iterate over the test cases and call copy Buffer with data.
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for i, testCase := range testCases {
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actualErr := copyBuffer(testCase.writer, testCase.disk, testCase.volume, testCase.path, testCase.buf)
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if actualErr != nil && testCase.shouldPass {
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t.Errorf("Test %d: Expected to pass but failed instead with \"%s\"", i+1, actualErr)
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}
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if actualErr == nil && !testCase.shouldPass {
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t.Errorf("Test %d: Expected to fail with error <Error> \"%v\", but instead passed", i+1, testCase.expectedErr)
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}
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// Failed as expected, but does it fail for the expected reason.
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if actualErr != nil && !testCase.shouldPass {
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if testCase.expectedErr.Error() != actualErr.Error() {
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t.Errorf("Test %d: Expected Error to be \"%v\", but instead found \"%v\" ", i+1, testCase.expectedErr, actualErr)
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}
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}
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// test passed as expected, asserting the result.
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if actualErr == nil && testCase.shouldPass {
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if !bytes.Equal(testCase.expectedResult, buffers[2].Bytes()) {
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t.Errorf("Test %d: copied buffer differs from the expected one.", i+1)
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}
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}
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}
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}
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