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| 1 | + |
| 2 | +import XCTest |
| 3 | +@testable import Diff |
| 4 | + |
| 5 | +struct KeyedIntArray: Equatable { |
| 6 | + let elements: [Int] |
| 7 | + let key: Int |
| 8 | + |
| 9 | + public static func ==(fst: KeyedIntArray, snd: KeyedIntArray) -> Bool { |
| 10 | + return fst.key == snd.key |
| 11 | + } |
| 12 | +} |
| 13 | + |
| 14 | +extension Array: Equatable { |
| 15 | + public static func ==<T>(fst: Array<T>, snd: Array<T>) -> Bool { |
| 16 | + return fst.count == snd.count |
| 17 | + } |
| 18 | +} |
| 19 | + |
| 20 | +extension KeyedIntArray: Collection { |
| 21 | + public func index(after i: Int) -> Int { |
| 22 | + return i + 1 |
| 23 | + } |
| 24 | + |
| 25 | + public typealias IndexType = Array<Int>.Index |
| 26 | + |
| 27 | + public var startIndex: IndexType { |
| 28 | + return elements.startIndex |
| 29 | + } |
| 30 | + |
| 31 | + public var endIndex: IndexType { |
| 32 | + return elements.endIndex |
| 33 | + } |
| 34 | + |
| 35 | + public subscript(i: IndexType) -> Int { |
| 36 | + return elements[i] |
| 37 | + } |
| 38 | +} |
| 39 | + |
| 40 | +class NestedDiffTests: XCTestCase { |
| 41 | + |
| 42 | + func testDiffOutputs() { |
| 43 | + |
| 44 | + let keyedExpectations = [ |
| 45 | + ( |
| 46 | + [], |
| 47 | + [ |
| 48 | + KeyedIntArray(elements: [1, 2], key: 0), |
| 49 | + KeyedIntArray(elements: [1], key: 1), |
| 50 | + ], |
| 51 | + "IS(0)IS(1)" |
| 52 | + ), |
| 53 | + ( |
| 54 | + [ |
| 55 | + KeyedIntArray(elements: [2], key: 0), |
| 56 | + KeyedIntArray(elements: [1], key: 1), |
| 57 | + ], |
| 58 | + [ |
| 59 | + KeyedIntArray(elements: [1], key: 0), |
| 60 | + KeyedIntArray(elements: [], key: 1), |
| 61 | + ], |
| 62 | + "DE(0,0)IE(0,0)DE(0,1)" |
| 63 | + ), |
| 64 | + ( |
| 65 | + [ |
| 66 | + KeyedIntArray(elements: [2], key: 0), |
| 67 | + KeyedIntArray(elements: [0], key: 5), |
| 68 | + KeyedIntArray(elements: [1], key: 1), |
| 69 | + ], |
| 70 | + [ |
| 71 | + KeyedIntArray(elements: [1], key: 0), |
| 72 | + KeyedIntArray(elements: [], key: 1), |
| 73 | + ], |
| 74 | + "DS(1)DE(0,0)IE(0,0)DE(0,2)" |
| 75 | + ), |
| 76 | + ( |
| 77 | + [ |
| 78 | + KeyedIntArray(elements: [2], key: 0), |
| 79 | + KeyedIntArray(elements: [0], key: 5), |
| 80 | + KeyedIntArray(elements: [1], key: 1), |
| 81 | + ], |
| 82 | + [ |
| 83 | + KeyedIntArray(elements: [1], key: 0), |
| 84 | + KeyedIntArray(elements: [], key: 1), |
| 85 | + ], |
| 86 | + "DS(1)DE(0,0)IE(0,0)DE(0,2)" |
| 87 | + ), |
| 88 | + ( |
| 89 | + [ |
| 90 | + KeyedIntArray(elements: [2], key: 0), |
| 91 | + KeyedIntArray(elements: [1, 2, 3], key: -1), |
| 92 | + KeyedIntArray(elements: [1], key: 1), |
| 93 | + ], |
| 94 | + [ |
| 95 | + KeyedIntArray(elements: [2, 3], key: 0), |
| 96 | + KeyedIntArray(elements: [1, 2], key: 1), |
| 97 | + ], |
| 98 | + "DS(1)IE(1,0)IE(1,1)" |
| 99 | + ), |
| 100 | + ( |
| 101 | + [ |
| 102 | + KeyedIntArray(elements: [2], key: 0), |
| 103 | + KeyedIntArray(elements: [1], key: 1), |
| 104 | + ], |
| 105 | + [ |
| 106 | + KeyedIntArray(elements: [2, 1], key: 0), |
| 107 | + KeyedIntArray(elements: [], key: 1), |
| 108 | + ], |
| 109 | + "IE(1,0)DE(0,1)" |
| 110 | + ), |
| 111 | + ( |
| 112 | + [ |
| 113 | + KeyedIntArray(elements: [], key: 0), |
| 114 | + KeyedIntArray(elements: [1, 2], key: 1), |
| 115 | + ], |
| 116 | + [ |
| 117 | + KeyedIntArray(elements: [2], key: 0), |
| 118 | + KeyedIntArray(elements: [], key: 1), |
| 119 | + ], |
| 120 | + "IE(0,0)DE(0,1)DE(1,1)" |
| 121 | + ), |
| 122 | + ( |
| 123 | + [ |
| 124 | + KeyedIntArray(elements: [1, 2], key: 0), |
| 125 | + KeyedIntArray(elements: [], key: 1), |
| 126 | + ], |
| 127 | + [ |
| 128 | + KeyedIntArray(elements: [], key: 0), |
| 129 | + KeyedIntArray(elements: [1], key: 1), |
| 130 | + ], |
| 131 | + "DE(0,0)DE(1,0)IE(0,1)" |
| 132 | + ), |
| 133 | + ( |
| 134 | + [ |
| 135 | + KeyedIntArray(elements: [], key: 0), |
| 136 | + KeyedIntArray(elements: [1], key: 1), |
| 137 | + KeyedIntArray(elements: [2], key: 2), |
| 138 | + ], |
| 139 | + [ |
| 140 | + KeyedIntArray(elements: [1, 2], key: 0), |
| 141 | + KeyedIntArray(elements: [], key: 1), |
| 142 | + KeyedIntArray(elements: [], key: 2), |
| 143 | + ], |
| 144 | + "IE(0,0)IE(1,0)DE(0,1)DE(0,2)" |
| 145 | + ), |
| 146 | + ] |
| 147 | + |
| 148 | + let expectations: [([[Int]], [[Int]], String)] = [ |
| 149 | + ( |
| 150 | + [], |
| 151 | + [ |
| 152 | + [1, 2], |
| 153 | + [1], |
| 154 | + ], |
| 155 | + "IS(0)IS(1)" |
| 156 | + ), |
| 157 | + ( |
| 158 | + [ |
| 159 | + [1, 2], |
| 160 | + [], |
| 161 | + ], |
| 162 | + [], |
| 163 | + "DS(0)DS(1)" |
| 164 | + ), |
| 165 | + ( |
| 166 | + [[1, 2], [], [1]], |
| 167 | + [[1, 2], [], [1]], |
| 168 | + "" |
| 169 | + ), |
| 170 | + ( |
| 171 | + [[1, 2], [1, 4]], |
| 172 | + [[5, 2], [10, 4, 8]], |
| 173 | + "DS(1)IS(1)DE(0,0)IE(0,0)" |
| 174 | + ), |
| 175 | + ( |
| 176 | + [[1]], |
| 177 | + [[], [1, 2]], |
| 178 | + "DS(0)IS(0)IS(1)" |
| 179 | + ), |
| 180 | + ( |
| 181 | + [[1]], |
| 182 | + [[], [2]], |
| 183 | + "IS(0)DE(0,0)IE(0,1)" |
| 184 | + ), |
| 185 | + ] |
| 186 | + |
| 187 | + for expectation in expectations { |
| 188 | + XCTAssertEqual( |
| 189 | + _test(from: expectation.0, to: expectation.1), |
| 190 | + expectation.2) |
| 191 | + } |
| 192 | + |
| 193 | + for expectation in keyedExpectations { |
| 194 | + XCTAssertEqual( |
| 195 | + _test(from: expectation.0, to: expectation.1), |
| 196 | + expectation.2) |
| 197 | + } |
| 198 | + } |
| 199 | + |
| 200 | + func _test<T: Collection>( |
| 201 | + from: [T], |
| 202 | + to: [T]) -> String |
| 203 | + where |
| 204 | + T: Equatable, |
| 205 | + T.Iterator.Element: Equatable { |
| 206 | + return from |
| 207 | + .nestedDiff(to: to) |
| 208 | + .reduce("") { $0 + $1.debugDescription } |
| 209 | + } |
| 210 | +} |
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