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minio/cmd/xl-v1-metadata_test.go

212 lines
5.4 KiB

/*
* Minio Cloud Storage, (C) 2015, 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 (
"errors"
"strconv"
"testing"
"time"
humanize "github.com/dustin/go-humanize"
)
// Test xlMetaV1.AddObjectPart()
func TestAddObjectPart(t *testing.T) {
testCases := []struct {
partNum int
expectedIndex int
}{
{1, 0},
{2, 1},
{4, 2},
{5, 3},
{7, 4},
// Insert part.
{3, 2},
// Replace existing part.
{4, 3},
// Missing part.
{6, -1},
}
// Setup.
xlMeta := newXLMetaV1("test-object", 8, 8)
if !xlMeta.IsValid() {
t.Fatalf("unable to get xl meta")
}
// Test them.
for _, testCase := range testCases {
if testCase.expectedIndex > -1 {
partNumString := strconv.Itoa(testCase.partNum)
xlMeta.AddObjectPart(testCase.partNum, "part."+partNumString, "etag."+partNumString, int64(testCase.partNum+humanize.MiByte))
}
if index := objectPartIndex(xlMeta.Parts, testCase.partNum); index != testCase.expectedIndex {
t.Fatalf("%+v: expected = %d, got: %d", testCase, testCase.expectedIndex, index)
}
}
}
// Test objectPartIndex().
// generates a sample xlMeta data and asserts the output of objectPartIndex() with the expected value.
func TestObjectPartIndex(t *testing.T) {
testCases := []struct {
partNum int
expectedIndex int
}{
{2, 1},
{1, 0},
{5, 3},
{4, 2},
{7, 4},
}
// Setup.
xlMeta := newXLMetaV1("test-object", 8, 8)
if !xlMeta.IsValid() {
t.Fatalf("unable to get xl meta")
}
// Add some parts for testing.
for _, testCase := range testCases {
partNumString := strconv.Itoa(testCase.partNum)
xlMeta.AddObjectPart(testCase.partNum, "part."+partNumString, "etag."+partNumString, int64(testCase.partNum+humanize.MiByte))
}
// Add failure test case.
testCases = append(testCases, struct {
partNum int
expectedIndex int
}{6, -1})
// Test them.
for _, testCase := range testCases {
if index := objectPartIndex(xlMeta.Parts, testCase.partNum); index != testCase.expectedIndex {
t.Fatalf("%+v: expected = %d, got: %d", testCase, testCase.expectedIndex, index)
}
}
}
// Test xlMetaV1.ObjectToPartOffset().
func TestObjectToPartOffset(t *testing.T) {
// Setup.
xlMeta := newXLMetaV1("test-object", 8, 8)
if !xlMeta.IsValid() {
t.Fatalf("unable to get xl meta")
}
// Add some parts for testing.
// Total size of all parts is 5,242,899 bytes.
for _, partNum := range []int{1, 2, 4, 5, 7} {
partNumString := strconv.Itoa(partNum)
xlMeta.AddObjectPart(partNum, "part."+partNumString, "etag."+partNumString, int64(partNum+humanize.MiByte))
}
testCases := []struct {
offset int64
expectedIndex int
expectedOffset int64
expectedErr error
}{
{0, 0, 0, nil},
{1 * humanize.MiByte, 0, 1 * humanize.MiByte, nil},
{1 + humanize.MiByte, 1, 0, nil},
{2 + humanize.MiByte, 1, 1, nil},
// Its valid for zero sized object.
{-1, 0, -1, nil},
// Max fffset is always (size - 1).
{(1 + 2 + 4 + 5 + 7) + (5 * humanize.MiByte) - 1, 4, 1048582, nil},
// Error if offset is size.
{(1 + 2 + 4 + 5 + 7) + (5 * humanize.MiByte), 0, 0, InvalidRange{}},
}
// Test them.
for _, testCase := range testCases {
index, offset, err := xlMeta.ObjectToPartOffset(testCase.offset)
err = errorCause(err)
if err != testCase.expectedErr {
t.Fatalf("%+v: expected = %s, got: %s", testCase, testCase.expectedErr, err)
}
if index != testCase.expectedIndex {
t.Fatalf("%+v: index: expected = %d, got: %d", testCase, testCase.expectedIndex, index)
}
if offset != testCase.expectedOffset {
t.Fatalf("%+v: offset: expected = %d, got: %d", testCase, testCase.expectedOffset, offset)
}
}
}
// Helper function to check if two xlMetaV1 values are similar.
func isXLMetaSimilar(m, n xlMetaV1) bool {
if m.Version != n.Version {
return false
}
if m.Format != n.Format {
return false
}
if len(m.Parts) != len(n.Parts) {
return false
}
return true
}
func TestPickValidXLMeta(t *testing.T) {
obj := "object"
x1 := newXLMetaV1(obj, 4, 4)
now := time.Now().UTC()
x1.Stat.ModTime = now
invalidX1 := x1
invalidX1.Version = "invalid-version"
xs := []xlMetaV1{x1, x1, x1, x1}
invalidXS := []xlMetaV1{invalidX1, invalidX1, invalidX1, invalidX1}
testCases := []struct {
metaArr []xlMetaV1
modTime time.Time
xlMeta xlMetaV1
expectedErr error
}{
{
metaArr: xs,
modTime: now,
xlMeta: x1,
expectedErr: nil,
},
{
metaArr: invalidXS,
modTime: now,
xlMeta: invalidX1,
expectedErr: errors.New("No valid xl.json present"),
},
}
for i, test := range testCases {
xlMeta, err := pickValidXLMeta(test.metaArr, test.modTime)
if test.expectedErr != nil {
if errorCause(err).Error() != test.expectedErr.Error() {
t.Errorf("Test %d: Expected to fail with %v but received %v",
i+1, test.expectedErr, err)
}
} else {
if !isXLMetaSimilar(xlMeta, test.xlMeta) {
t.Errorf("Test %d: Expected %v but received %v",
i+1, test.xlMeta, xlMeta)
}
}
}
}