| Kent Hagerman | 433a31a | 2020-05-20 19:04:48 -0400 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2020-present Open Networking Foundation |
| 3 | |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | package flow |
| 18 | |
| 19 | import ( |
| 20 | "bufio" |
| 21 | "fmt" |
| 22 | "os" |
| 23 | "regexp" |
| 24 | "strconv" |
| 25 | "strings" |
| 26 | "testing" |
| 27 | ) |
| 28 | |
| 29 | // TestLoadersIdentical ensures that the group, flow, and meter loaders always have an identical implementation. |
| 30 | func TestLoadersIdentical(t *testing.T) { |
| 31 | identical := [][]string{ |
| 32 | {"ofp\\.OfpFlowStats", "ofp\\.OfpGroupEntry", "ofp\\.OfpMeterEntry"}, |
| 33 | {"\\.Id", "\\.Desc\\.GroupId", "\\.Config.MeterId"}, |
| 34 | {"uint64", "uint32", "uint32"}, |
| 35 | {"Flow", "Group", "Meter"}, |
| 36 | {"flow", "group", "meter"}, |
| 37 | } |
| 38 | |
| 39 | regexes := make([]*regexp.Regexp, len(identical)) |
| 40 | for i, group := range identical { |
| 41 | regexes[i] = regexp.MustCompile(strings.Join(group, "|")) |
| 42 | } |
| 43 | |
| 44 | for i := 1; i < len(identical[0]); i++ { |
| 45 | if err := compare(regexes, "../"+identical[4][0]+"/loader.go", "../"+identical[4][i]+"/loader.go"); err != nil { |
| 46 | t.Error(err) |
| 47 | return |
| 48 | } |
| 49 | } |
| 50 | } |
| 51 | |
| 52 | func compare(regexes []*regexp.Regexp, fileNameA, fileNameB string) error { |
| 53 | fileA, err := os.Open(fileNameA) |
| 54 | if err != nil { |
| 55 | return err |
| 56 | } |
| 57 | defer fileA.Close() |
| 58 | |
| 59 | fileB, err := os.Open(fileNameB) |
| 60 | if err != nil { |
| 61 | return err |
| 62 | } |
| 63 | defer fileB.Close() |
| 64 | |
| 65 | scannerA, scannerB := bufio.NewScanner(fileA), bufio.NewScanner(fileB) |
| 66 | |
| 67 | spaceRegex := regexp.MustCompile(" +") |
| 68 | |
| 69 | line := 1 |
| 70 | for { |
| 71 | if continueA, continueB := scannerA.Scan(), scannerB.Scan(); continueA != continueB { |
| 72 | if !continueA && continueB { |
| 73 | if err := scannerA.Err(); err != nil { |
| 74 | return err |
| 75 | } |
| 76 | } |
| 77 | if continueA && !continueB { |
| 78 | if err := scannerB.Err(); err != nil { |
| 79 | return err |
| 80 | } |
| 81 | } |
| 82 | return fmt.Errorf("line %d: files are not the same length", line) |
| 83 | } else if !continueA { |
| 84 | // EOF from both files |
| 85 | break |
| 86 | } |
| 87 | |
| 88 | textA, textB := scannerA.Text(), scannerB.Text() |
| 89 | |
| 90 | replacedA, replacedB := textA, textB |
| 91 | for i, regex := range regexes { |
| 92 | replacement := "{{type" + strconv.Itoa(i) + "}}" |
| 93 | replacedA, replacedB = regex.ReplaceAllString(replacedA, replacement), regex.ReplaceAllString(replacedB, replacement) |
| 94 | } |
| 95 | |
| 96 | // replace multiple spaces with single space |
| 97 | replacedA, replacedB = spaceRegex.ReplaceAllString(replacedA, " "), spaceRegex.ReplaceAllString(replacedB, " ") |
| 98 | |
| 99 | if replacedA != replacedB { |
| 100 | return fmt.Errorf("line %d: files %s and %s do not match: \n\t%s\n\t%s\n\n\t%s\n\t%s", line, fileNameA, fileNameB, textA, textB, replacedA, replacedB) |
| 101 | } |
| 102 | |
| 103 | line++ |
| 104 | } |
| 105 | |
| 106 | if err := scannerA.Err(); err != nil { |
| 107 | return err |
| 108 | } |
| 109 | if err := scannerB.Err(); err != nil { |
| 110 | return err |
| 111 | } |
| 112 | return nil |
| 113 | } |