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minio/cmd/erasure-metadata-utils_test.go

202 lines
6.5 KiB

/*
* MinIO Cloud Storage, (C) 2015, 2016, 2017 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 (
"context"
"reflect"
"testing"
)
// Tests caclculating disk count.
func TestDiskCount(t *testing.T) {
testCases := []struct {
disks []StorageAPI
diskCount int
}{
// Test case - 1
{
disks: []StorageAPI{&xlStorage{}, &xlStorage{}, &xlStorage{}, &xlStorage{}},
diskCount: 4,
},
// Test case - 2
{
disks: []StorageAPI{nil, &xlStorage{}, &xlStorage{}, &xlStorage{}},
diskCount: 3,
},
}
for i, testCase := range testCases {
cdiskCount := diskCount(testCase.disks)
if cdiskCount != testCase.diskCount {
t.Errorf("Test %d: Expected %d, got %d", i+1, testCase.diskCount, cdiskCount)
}
}
}
// Test for reduceErrs, reduceErr reduces collection
// of errors into a single maximal error with in the list.
func TestReduceErrs(t *testing.T) {
// List all of all test cases to validate various cases of reduce errors.
testCases := []struct {
errs []error
ignoredErrs []error
err error
}{
// Validate if have reduced properly.
{[]error{
errDiskNotFound,
errDiskNotFound,
errDiskFull,
}, []error{}, errErasureReadQuorum},
// Validate if have no consensus.
{[]error{
errDiskFull,
errDiskNotFound,
nil, nil,
}, []error{}, errErasureReadQuorum},
// Validate if have consensus and errors ignored.
{[]error{
errVolumeNotFound,
errVolumeNotFound,
errVolumeNotFound,
errVolumeNotFound,
errVolumeNotFound,
errDiskNotFound,
errDiskNotFound,
}, []error{errDiskNotFound}, errVolumeNotFound},
{[]error{}, []error{}, errErasureReadQuorum},
{[]error{errFileNotFound, errFileNotFound, errFileNotFound,
errFileNotFound, errFileNotFound, nil, nil, nil, nil, nil},
nil, nil},
}
// Validates list of all the testcases for returning valid errors.
for i, testCase := range testCases {
gotErr := reduceReadQuorumErrs(context.Background(), testCase.errs, testCase.ignoredErrs, 5)
if gotErr != testCase.err {
t.Errorf("Test %d : expected %s, got %s", i+1, testCase.err, gotErr)
}
gotNewErr := reduceWriteQuorumErrs(context.Background(), testCase.errs, testCase.ignoredErrs, 6)
if gotNewErr != errErasureWriteQuorum {
t.Errorf("Test %d : expected %s, got %s", i+1, errErasureWriteQuorum, gotErr)
}
}
}
// TestHashOrder - test order of ints in array
func TestHashOrder(t *testing.T) {
testCases := []struct {
objectName string
hashedOrder []int
}{
// cases which should pass the test.
// passing in valid object name.
{"object", []int{14, 15, 16, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13}},
{"The Shining Script <v1>.pdf", []int{16, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15}},
{"Cost Benefit Analysis (2009-2010).pptx", []int{15, 16, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14}},
{"117Gn8rfHL2ACARPAhaFd0AGzic9pUbIA/5OCn5A", []int{3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 1, 2}},
{"SHØRT", []int{11, 12, 13, 14, 15, 16, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10}},
{"There are far too many object names, and far too few bucket names!", []int{15, 16, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14}},
{"a/b/c/", []int{3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 1, 2}},
{"/a/b/c", []int{6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 1, 2, 3, 4, 5}},
{string([]byte{0xff, 0xfe, 0xfd}), []int{15, 16, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14}},
}
// Tests hashing order to be consistent.
for i, testCase := range testCases {
hashedOrder := hashOrder(testCase.objectName, 16)
if !reflect.DeepEqual(testCase.hashedOrder, hashedOrder) {
t.Errorf("Test case %d: Expected \"%v\" but failed \"%v\"", i+1, testCase.hashedOrder, hashedOrder)
}
}
// Tests hashing order to fail for when order is '-1'.
if hashedOrder := hashOrder("This will fail", -1); hashedOrder != nil {
t.Errorf("Test: Expect \"nil\" but failed \"%#v\"", hashedOrder)
}
if hashedOrder := hashOrder("This will fail", 0); hashedOrder != nil {
t.Errorf("Test: Expect \"nil\" but failed \"%#v\"", hashedOrder)
}
}
func TestShuffleDisks(t *testing.T) {
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
nDisks := 16
disks, err := getRandomDisks(nDisks)
if err != nil {
t.Fatal(err)
}
objLayer, _, err := initObjectLayer(ctx, mustGetZoneEndpoints(disks...))
if err != nil {
removeRoots(disks)
t.Fatal(err)
}
defer removeRoots(disks)
z := objLayer.(*erasureServerSets)
testShuffleDisks(t, z)
}
// Test shuffleDisks which returns shuffled slice of disks for their actual distribution.
func testShuffleDisks(t *testing.T, z *erasureServerSets) {
disks := z.serverSets[0].GetDisks(0)()
distribution := []int{16, 14, 12, 10, 8, 6, 4, 2, 1, 3, 5, 7, 9, 11, 13, 15}
shuffledDisks := shuffleDisks(disks, distribution)
// From the "distribution" above you can notice that:
// 1st data block is in the 9th disk (i.e distribution index 8)
// 2nd data block is in the 8th disk (i.e distribution index 7) and so on.
if shuffledDisks[0] != disks[8] ||
shuffledDisks[1] != disks[7] ||
shuffledDisks[2] != disks[9] ||
shuffledDisks[3] != disks[6] ||
shuffledDisks[4] != disks[10] ||
shuffledDisks[5] != disks[5] ||
shuffledDisks[6] != disks[11] ||
shuffledDisks[7] != disks[4] ||
shuffledDisks[8] != disks[12] ||
shuffledDisks[9] != disks[3] ||
shuffledDisks[10] != disks[13] ||
shuffledDisks[11] != disks[2] ||
shuffledDisks[12] != disks[14] ||
shuffledDisks[13] != disks[1] ||
shuffledDisks[14] != disks[15] ||
shuffledDisks[15] != disks[0] {
t.Errorf("shuffleDisks returned incorrect order.")
}
}
// TestEvalDisks tests the behavior of evalDisks
func TestEvalDisks(t *testing.T) {
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
nDisks := 16
disks, err := getRandomDisks(nDisks)
if err != nil {
t.Fatal(err)
}
objLayer, _, err := initObjectLayer(ctx, mustGetZoneEndpoints(disks...))
if err != nil {
removeRoots(disks)
t.Fatal(err)
}
defer removeRoots(disks)
z := objLayer.(*erasureServerSets)
testShuffleDisks(t, z)
}