623e0f9243
This change is needed to make reading from objects future proof in-terms of handling online disks. Our current counter is not based on affirmative knowledge and relies on arithmetic sequence which can lead to bugs. Using modTime simplifies the understanding of `xl.json` and future tooling / debugging of the format.
84 lines
2.3 KiB
Go
84 lines
2.3 KiB
Go
/*
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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 main
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import (
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"testing"
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"time"
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)
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// validates functionality provided to find most common
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// time occurrence from a list of time.
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func TestCommonTime(t *testing.T) {
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// List of test cases for common modTime.
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testCases := []struct {
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times []time.Time
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time time.Time
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}{
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{
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// 1. Tests common times when slice has varying time elements.
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[]time.Time{
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time.Unix(0, 1).UTC(),
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time.Unix(0, 2).UTC(),
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time.Unix(0, 3).UTC(),
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time.Unix(0, 3).UTC(),
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time.Unix(0, 2).UTC(),
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time.Unix(0, 3).UTC(),
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time.Unix(0, 1).UTC(),
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}, time.Unix(0, 3).UTC(),
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},
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{
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// 2. Tests common time obtained when all elements are equal.
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[]time.Time{
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time.Unix(0, 3).UTC(),
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time.Unix(0, 3).UTC(),
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time.Unix(0, 3).UTC(),
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time.Unix(0, 3).UTC(),
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time.Unix(0, 3).UTC(),
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time.Unix(0, 3).UTC(),
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time.Unix(0, 3).UTC(),
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}, time.Unix(0, 3).UTC(),
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},
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{
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// 3. Tests common time obtained when elements have a mixture
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// of sentinel values.
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[]time.Time{
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time.Unix(0, 3).UTC(),
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time.Unix(0, 3).UTC(),
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time.Unix(0, 2).UTC(),
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time.Unix(0, 1).UTC(),
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time.Unix(0, 3).UTC(),
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time.Unix(0, 4).UTC(),
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time.Unix(0, 3).UTC(),
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timeSentinel,
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timeSentinel,
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timeSentinel,
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}, time.Unix(0, 3).UTC(),
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},
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}
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// Tests all the testcases, and validates them against expected
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// common modtime. Tests fail if modtime does not match.
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for i, testCase := range testCases {
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// Obtain a common mod time from modTimes slice.
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ctime := commonTime(testCase.times)
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if testCase.time != ctime {
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t.Fatalf("Test case %d, expect to pass but failed. Wanted modTime: %s, got modTime: %s\n", i+1, testCase.time, ctime)
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}
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}
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}
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