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Merge pull request #27 from wokalski/14-NestedDiff
NestedDiff
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,210 @@ | ||
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| import XCTest | ||
| @testable import Diff | ||
|
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| struct KeyedIntArray: Equatable { | ||
| let elements: [Int] | ||
| let key: Int | ||
|
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| public static func ==(fst: KeyedIntArray, snd: KeyedIntArray) -> Bool { | ||
| return fst.key == snd.key | ||
| } | ||
| } | ||
|
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| extension Array: Equatable { | ||
| public static func ==<T>(fst: Array<T>, snd: Array<T>) -> Bool { | ||
| return fst.count == snd.count | ||
| } | ||
| } | ||
|
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| extension KeyedIntArray: Collection { | ||
| public func index(after i: Int) -> Int { | ||
| return i + 1 | ||
| } | ||
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| public typealias IndexType = Array<Int>.Index | ||
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| public var startIndex: IndexType { | ||
| return elements.startIndex | ||
| } | ||
|
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| public var endIndex: IndexType { | ||
| return elements.endIndex | ||
| } | ||
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| public subscript(i: IndexType) -> Int { | ||
| return elements[i] | ||
| } | ||
| } | ||
|
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| class NestedDiffTests: XCTestCase { | ||
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| func testDiffOutputs() { | ||
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| let keyedExpectations = [ | ||
| ( | ||
| [], | ||
| [ | ||
| KeyedIntArray(elements: [1, 2], key: 0), | ||
| KeyedIntArray(elements: [1], key: 1), | ||
| ], | ||
| "IS(0)IS(1)" | ||
| ), | ||
| ( | ||
| [ | ||
| KeyedIntArray(elements: [2], key: 0), | ||
| KeyedIntArray(elements: [1], key: 1), | ||
| ], | ||
| [ | ||
| KeyedIntArray(elements: [1], key: 0), | ||
| KeyedIntArray(elements: [], key: 1), | ||
| ], | ||
| "DE(0,0)IE(0,0)DE(0,1)" | ||
| ), | ||
| ( | ||
| [ | ||
| KeyedIntArray(elements: [2], key: 0), | ||
| KeyedIntArray(elements: [0], key: 5), | ||
| KeyedIntArray(elements: [1], key: 1), | ||
| ], | ||
| [ | ||
| KeyedIntArray(elements: [1], key: 0), | ||
| KeyedIntArray(elements: [], key: 1), | ||
| ], | ||
| "DS(1)DE(0,0)IE(0,0)DE(0,2)" | ||
| ), | ||
| ( | ||
| [ | ||
| KeyedIntArray(elements: [2], key: 0), | ||
| KeyedIntArray(elements: [0], key: 5), | ||
| KeyedIntArray(elements: [1], key: 1), | ||
| ], | ||
| [ | ||
| KeyedIntArray(elements: [1], key: 0), | ||
| KeyedIntArray(elements: [], key: 1), | ||
| ], | ||
| "DS(1)DE(0,0)IE(0,0)DE(0,2)" | ||
| ), | ||
| ( | ||
| [ | ||
| KeyedIntArray(elements: [2], key: 0), | ||
| KeyedIntArray(elements: [1, 2, 3], key: -1), | ||
| KeyedIntArray(elements: [1], key: 1), | ||
| ], | ||
| [ | ||
| KeyedIntArray(elements: [2, 3], key: 0), | ||
| KeyedIntArray(elements: [1, 2], key: 1), | ||
| ], | ||
| "DS(1)IE(1,0)IE(1,1)" | ||
| ), | ||
| ( | ||
| [ | ||
| KeyedIntArray(elements: [2], key: 0), | ||
| KeyedIntArray(elements: [1], key: 1), | ||
| ], | ||
| [ | ||
| KeyedIntArray(elements: [2, 1], key: 0), | ||
| KeyedIntArray(elements: [], key: 1), | ||
| ], | ||
| "IE(1,0)DE(0,1)" | ||
| ), | ||
| ( | ||
| [ | ||
| KeyedIntArray(elements: [], key: 0), | ||
| KeyedIntArray(elements: [1, 2], key: 1), | ||
| ], | ||
| [ | ||
| KeyedIntArray(elements: [2], key: 0), | ||
| KeyedIntArray(elements: [], key: 1), | ||
| ], | ||
| "IE(0,0)DE(0,1)DE(1,1)" | ||
| ), | ||
| ( | ||
| [ | ||
| KeyedIntArray(elements: [1, 2], key: 0), | ||
| KeyedIntArray(elements: [], key: 1), | ||
| ], | ||
| [ | ||
| KeyedIntArray(elements: [], key: 0), | ||
| KeyedIntArray(elements: [1], key: 1), | ||
| ], | ||
| "DE(0,0)DE(1,0)IE(0,1)" | ||
| ), | ||
| ( | ||
| [ | ||
| KeyedIntArray(elements: [], key: 0), | ||
| KeyedIntArray(elements: [1], key: 1), | ||
| KeyedIntArray(elements: [2], key: 2), | ||
| ], | ||
| [ | ||
| KeyedIntArray(elements: [1, 2], key: 0), | ||
| KeyedIntArray(elements: [], key: 1), | ||
| KeyedIntArray(elements: [], key: 2), | ||
| ], | ||
| "IE(0,0)IE(1,0)DE(0,1)DE(0,2)" | ||
| ), | ||
| ] | ||
|
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| let expectations: [([[Int]], [[Int]], String)] = [ | ||
| ( | ||
| [], | ||
| [ | ||
| [1, 2], | ||
| [1], | ||
| ], | ||
| "IS(0)IS(1)" | ||
| ), | ||
| ( | ||
| [ | ||
| [1, 2], | ||
| [], | ||
| ], | ||
| [], | ||
| "DS(0)DS(1)" | ||
| ), | ||
| ( | ||
| [[1, 2], [], [1]], | ||
| [[1, 2], [], [1]], | ||
| "" | ||
| ), | ||
| ( | ||
| [[1, 2], [1, 4]], | ||
| [[5, 2], [10, 4, 8]], | ||
| "DS(1)IS(1)DE(0,0)IE(0,0)" | ||
| ), | ||
| ( | ||
| [[1]], | ||
| [[], [1, 2]], | ||
| "DS(0)IS(0)IS(1)" | ||
| ), | ||
| ( | ||
| [[1]], | ||
| [[], [2]], | ||
| "IS(0)DE(0,0)IE(0,1)" | ||
| ), | ||
| ] | ||
|
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| for expectation in expectations { | ||
| XCTAssertEqual( | ||
| _test(from: expectation.0, to: expectation.1), | ||
| expectation.2) | ||
| } | ||
|
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| for expectation in keyedExpectations { | ||
| XCTAssertEqual( | ||
| _test(from: expectation.0, to: expectation.1), | ||
| expectation.2) | ||
| } | ||
| } | ||
|
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| func _test<T: Collection>( | ||
| from: [T], | ||
| to: [T]) -> String | ||
| where | ||
| T: Equatable, | ||
| T.Iterator.Element: Equatable { | ||
| return from | ||
| .nestedDiff(to: to) | ||
| .reduce("") { $0 + $1.debugDescription } | ||
| } | ||
| } |
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