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Merge pull request #46 from mattpolzin/feature/testing-comparisons
Feature/testing comparisons
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,78 @@ | ||
| // | ||
| // File.swift | ||
| // | ||
| // | ||
| // Created by Mathew Polzin on 11/5/19. | ||
| // | ||
|
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| import JSONAPI | ||
|
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| public enum ArrayElementComparison: Equatable, CustomStringConvertible { | ||
| case same | ||
| case missing | ||
| case differentTypes(String, String) | ||
| case differentValues(String, String) | ||
| case prebuilt(String) | ||
|
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| public init(sameTypeComparison: Comparison) { | ||
| switch sameTypeComparison { | ||
| case .same: | ||
| self = .same | ||
| case .different(let one, let two): | ||
| self = .differentValues(one, two) | ||
| case .prebuilt(let str): | ||
| self = .prebuilt(str) | ||
| } | ||
| } | ||
|
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| public init(resourceObjectComparison: ResourceObjectComparison) { | ||
| guard !resourceObjectComparison.isSame else { | ||
| self = .same | ||
| return | ||
| } | ||
|
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| self = .prebuilt( | ||
| resourceObjectComparison | ||
| .differences | ||
| .sorted { $0.key < $1.key } | ||
| .map { "\($0.key): \($0.value)" } | ||
| .joined(separator: ", ") | ||
| ) | ||
| } | ||
|
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| public var description: String { | ||
| switch self { | ||
| case .same: | ||
| return "same" | ||
| case .missing: | ||
| return "missing" | ||
| case .differentTypes(let one, let two), | ||
| .differentValues(let one, let two): | ||
| return "\(one) ≠ \(two)" | ||
| case .prebuilt(let description): | ||
| return description | ||
| } | ||
| } | ||
|
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| public var rawValue: String { description } | ||
| } | ||
|
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| extension Array { | ||
| func compare(to other: Self, using compare: (Element, Element) -> ArrayElementComparison) -> [ArrayElementComparison] { | ||
| let isSelfLonger = count >= other.count | ||
|
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| let longer = isSelfLonger ? self : other | ||
| let shorter = isSelfLonger ? other : self | ||
|
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| return longer.indices.map { idx in | ||
| guard shorter.indices.contains(idx) else { | ||
| return .missing | ||
| } | ||
|
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| let this = longer[idx] | ||
| let other = shorter[idx] | ||
|
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| return compare(this, other) | ||
| } | ||
| } | ||
| } |
78 changes: 78 additions & 0 deletions
78
Sources/JSONAPITesting/Comparisons/AttributesCompare.swift
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,78 @@ | ||
| // | ||
| // File.swift | ||
| // | ||
| // | ||
| // Created by Mathew Polzin on 11/3/19. | ||
| // | ||
|
|
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| import JSONAPI | ||
|
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| extension Attributes { | ||
| public func compare(to other: Self) -> [String: Comparison] { | ||
| let mirror1 = Mirror(reflecting: self) | ||
| let mirror2 = Mirror(reflecting: other) | ||
|
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| var comparisons = [String: Comparison]() | ||
|
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| for child in mirror1.children { | ||
| guard let childLabel = child.label else { continue } | ||
|
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| let childDescription = attributeDescription(of: child.value) | ||
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| guard let otherChild = mirror2.children.first(where: { $0.label == childLabel }) else { | ||
| comparisons[childLabel] = .different(childDescription, "missing") | ||
| continue | ||
| } | ||
|
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| if (attributesEqual(child.value, otherChild.value)) { | ||
| comparisons[childLabel] = .same | ||
| } else { | ||
| let otherChildDescription = attributeDescription(of: otherChild.value) | ||
|
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| comparisons[childLabel] = .different(childDescription, otherChildDescription) | ||
| } | ||
| } | ||
|
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| return comparisons | ||
| } | ||
| } | ||
|
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| fileprivate func attributesEqual(_ one: Any, _ two: Any) -> Bool { | ||
| guard let attr = one as? AbstractAttribute else { | ||
| return false | ||
| } | ||
|
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| return attr.equals(two) | ||
| } | ||
|
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| fileprivate func attributeDescription(of thing: Any) -> String { | ||
| return (thing as? AbstractAttribute)?.abstractDescription ?? String(describing: thing) | ||
| } | ||
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| protocol AbstractAttribute { | ||
| var abstractDescription: String { get } | ||
|
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| func equals(_ other: Any) -> Bool | ||
| } | ||
|
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| extension Attribute: AbstractAttribute { | ||
| var abstractDescription: String { String(describing: value) } | ||
|
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| func equals(_ other: Any) -> Bool { | ||
| guard let attributeB = other as? Self else { | ||
| return false | ||
| } | ||
| return abstractDescription == attributeB.abstractDescription | ||
| } | ||
| } | ||
|
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| extension TransformedAttribute: AbstractAttribute { | ||
| var abstractDescription: String { String(describing: value) } | ||
|
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| func equals(_ other: Any) -> Bool { | ||
| guard let attributeB = other as? Self else { | ||
| return false | ||
| } | ||
| return abstractDescription == attributeB.abstractDescription | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,68 @@ | ||
| // | ||
| // Comparison.swift | ||
| // | ||
| // | ||
| // Created by Mathew Polzin on 11/3/19. | ||
| // | ||
|
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| public enum Comparison: Equatable, CustomStringConvertible { | ||
| case same | ||
| case different(String, String) | ||
| case prebuilt(String) | ||
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| init<T: Equatable>(_ one: T, _ two: T) { | ||
| guard one == two else { | ||
| self = .different(String(describing: one), String(describing: two)) | ||
| return | ||
| } | ||
| self = .same | ||
| } | ||
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| init(reducing other: ArrayElementComparison) { | ||
| switch other { | ||
| case .same: | ||
| self = .same | ||
| case .differentTypes(let one, let two), | ||
| .differentValues(let one, let two): | ||
| self = .different(one, two) | ||
| case .missing: | ||
| self = .different("array length 1", "array length 2") | ||
| case .prebuilt(let str): | ||
| self = .prebuilt(str) | ||
| } | ||
| } | ||
|
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| public var description: String { | ||
| switch self { | ||
| case .same: | ||
| return "same" | ||
| case .different(let one, let two): | ||
| return "\(one) ≠ \(two)" | ||
| case .prebuilt(let str): | ||
| return str | ||
| } | ||
| } | ||
|
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| public var rawValue: String { description } | ||
|
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| public var isSame: Bool { self == .same } | ||
| } | ||
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| public typealias NamedDifferences = [String: String] | ||
|
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| public protocol PropertyComparable: CustomStringConvertible { | ||
| var differences: NamedDifferences { get } | ||
| } | ||
|
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| extension PropertyComparable { | ||
| public var description: String { | ||
| return differences | ||
| .map { "(\($0): \($1))" } | ||
| .sorted() | ||
| .joined(separator: ", ") | ||
| } | ||
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| public var rawValue: String { description } | ||
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| public var isSame: Bool { differences.isEmpty } | ||
| } |
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