Colin Cross | 72bd193 | 2015-03-16 00:13:59 -0700 | [diff] [blame] | 1 | // Copyright 2015 Google Inc. All rights reserved. |
| 2 | // |
| 3 | // Licensed under the Apache License, Version 2.0 (the "License"); |
| 4 | // you may not use this file except in compliance with the License. |
| 5 | // You may obtain a copy of the License at |
| 6 | // |
| 7 | // http://www.apache.org/licenses/LICENSE-2.0 |
| 8 | // |
| 9 | // Unless required by applicable law or agreed to in writing, software |
| 10 | // distributed under the License is distributed on an "AS IS" BASIS, |
| 11 | // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 12 | // See the License for the specific language governing permissions and |
| 13 | // limitations under the License. |
| 14 | |
| 15 | package blueprint |
| 16 | |
| 17 | import ( |
| 18 | "reflect" |
| 19 | "testing" |
| 20 | ) |
| 21 | |
| 22 | var ( |
| 23 | testModuleA = &moduleInfo{variantName: "testModuleA"} |
| 24 | testModuleB = &moduleInfo{variantName: "testModuleB"} |
| 25 | testModuleC = &moduleInfo{variantName: "testModuleC"} |
| 26 | testModuleD = &moduleInfo{variantName: "testModuleD"} |
| 27 | testModuleE = &moduleInfo{variantName: "testModuleE"} |
| 28 | testModuleF = &moduleInfo{variantName: "testModuleF"} |
| 29 | ) |
| 30 | |
| 31 | func (m *moduleInfo) String() string { |
| 32 | return m.variantName |
| 33 | } |
| 34 | |
| 35 | var spliceModulesTestCases = []struct { |
| 36 | in []*moduleInfo |
| 37 | replace *moduleInfo |
| 38 | with []*moduleInfo |
| 39 | out []*moduleInfo |
| 40 | reallocate bool |
| 41 | }{ |
| 42 | { |
| 43 | // Insert at the beginning |
| 44 | in: []*moduleInfo{testModuleA, testModuleB, testModuleC}, |
| 45 | replace: testModuleA, |
| 46 | with: []*moduleInfo{testModuleD, testModuleE}, |
| 47 | out: []*moduleInfo{testModuleD, testModuleE, testModuleB, testModuleC}, |
| 48 | reallocate: true, |
| 49 | }, |
| 50 | { |
| 51 | // Insert in the middle |
| 52 | in: []*moduleInfo{testModuleA, testModuleB, testModuleC}, |
| 53 | replace: testModuleB, |
| 54 | with: []*moduleInfo{testModuleD, testModuleE}, |
| 55 | out: []*moduleInfo{testModuleA, testModuleD, testModuleE, testModuleC}, |
| 56 | reallocate: true, |
| 57 | }, |
| 58 | { |
| 59 | // Insert at the end |
| 60 | in: []*moduleInfo{testModuleA, testModuleB, testModuleC}, |
| 61 | replace: testModuleC, |
| 62 | with: []*moduleInfo{testModuleD, testModuleE}, |
| 63 | out: []*moduleInfo{testModuleA, testModuleB, testModuleD, testModuleE}, |
| 64 | reallocate: true, |
| 65 | }, |
| 66 | { |
| 67 | // Insert over a single element |
| 68 | in: []*moduleInfo{testModuleA}, |
| 69 | replace: testModuleA, |
| 70 | with: []*moduleInfo{testModuleD, testModuleE}, |
| 71 | out: []*moduleInfo{testModuleD, testModuleE}, |
| 72 | reallocate: true, |
| 73 | }, |
| 74 | { |
| 75 | // Insert at the beginning without reallocating |
| 76 | in: []*moduleInfo{testModuleA, testModuleB, testModuleC, nil}[0:3], |
| 77 | replace: testModuleA, |
| 78 | with: []*moduleInfo{testModuleD, testModuleE}, |
| 79 | out: []*moduleInfo{testModuleD, testModuleE, testModuleB, testModuleC}, |
| 80 | reallocate: false, |
| 81 | }, |
| 82 | { |
| 83 | // Insert in the middle without reallocating |
| 84 | in: []*moduleInfo{testModuleA, testModuleB, testModuleC, nil}[0:3], |
| 85 | replace: testModuleB, |
| 86 | with: []*moduleInfo{testModuleD, testModuleE}, |
| 87 | out: []*moduleInfo{testModuleA, testModuleD, testModuleE, testModuleC}, |
| 88 | reallocate: false, |
| 89 | }, |
| 90 | { |
| 91 | // Insert at the end without reallocating |
| 92 | in: []*moduleInfo{testModuleA, testModuleB, testModuleC, nil}[0:3], |
| 93 | replace: testModuleC, |
| 94 | with: []*moduleInfo{testModuleD, testModuleE}, |
| 95 | out: []*moduleInfo{testModuleA, testModuleB, testModuleD, testModuleE}, |
| 96 | reallocate: false, |
| 97 | }, |
| 98 | { |
| 99 | // Insert over a single element without reallocating |
| 100 | in: []*moduleInfo{testModuleA, nil}[0:1], |
| 101 | replace: testModuleA, |
| 102 | with: []*moduleInfo{testModuleD, testModuleE}, |
| 103 | out: []*moduleInfo{testModuleD, testModuleE}, |
| 104 | reallocate: false, |
| 105 | }, |
| 106 | } |
| 107 | |
| 108 | func TestSpliceModules(t *testing.T) { |
| 109 | for _, testCase := range spliceModulesTestCases { |
| 110 | in := make([]*moduleInfo, len(testCase.in), cap(testCase.in)) |
| 111 | copy(in, testCase.in) |
| 112 | origIn := in |
| 113 | got := spliceModules(in, testCase.replace, testCase.with) |
| 114 | if !reflect.DeepEqual(got, testCase.out) { |
| 115 | t.Errorf("test case: %v, %v -> %v", testCase.in, testCase.replace, testCase.with) |
| 116 | t.Errorf("incorrect output:") |
| 117 | t.Errorf(" expected: %v", testCase.out) |
| 118 | t.Errorf(" got: %v", got) |
| 119 | } |
| 120 | if sameArray(origIn, got) != !testCase.reallocate { |
| 121 | t.Errorf("test case: %v, %v -> %v", testCase.in, testCase.replace, testCase.with) |
| 122 | not := "" |
| 123 | if !testCase.reallocate { |
| 124 | not = " not" |
| 125 | } |
| 126 | t.Errorf(" expected to%s reallocate", not) |
| 127 | } |
| 128 | } |
| 129 | } |
| 130 | |
| 131 | func sameArray(a, b []*moduleInfo) bool { |
| 132 | return &a[0:cap(a)][cap(a)-1] == &b[0:cap(b)][cap(b)-1] |
Jamie Gennis | 6cafc2c | 2015-03-20 22:39:29 -0400 | [diff] [blame] | 133 | } |