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Merge pull request #31 from rock88/master
Handle unbehaviour singleton duplication in incorrect dependencies graph
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,71 @@ | ||
| // | ||
| // Test_SingletoneDuplication.swift | ||
| // EasyDi-iOS-Tests | ||
| // | ||
| // Created by Andrey Konoplyankin on 29.03.2021. | ||
| // Copyright © 2021 AndreyZarembo. All rights reserved. | ||
| // | ||
|
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| import XCTest | ||
| @testable import EasyDi | ||
|
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| fileprivate class SomeObjectA { | ||
| let objectB: SomeObjectB | ||
|
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| init(objectB: SomeObjectB) { | ||
| self.objectB = objectB | ||
| } | ||
| } | ||
|
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| fileprivate class SomeObjectB { | ||
| var objectA: SomeObjectA? | ||
| } | ||
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| fileprivate class TestAssembly: Assembly { | ||
| var objectA: SomeObjectA { | ||
| return define(scope: .lazySingleton, init: SomeObjectA(objectB: self.objectB)) | ||
| } | ||
|
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| var objectB: SomeObjectB { | ||
| return define(scope: .lazySingleton, init: SomeObjectB()) { | ||
| $0.objectA = self.objectA | ||
| return $0 | ||
| } | ||
| } | ||
| } | ||
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| final class Test_SingletonDuplication: XCTestCase { | ||
| func testSingletonDuplication() { | ||
| NSException.test_swizzleRaise() | ||
|
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| let context = DIContext() | ||
| let assembly = TestAssembly.instance(from: context) | ||
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| let _ = assembly.objectA | ||
| let _ = assembly.objectB | ||
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| XCTAssertEqual(NSException.last?.reason, "Singleton already exist, inspect your dependencies graph") | ||
| NSException.last = nil | ||
| } | ||
| } | ||
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| extension NSException { | ||
| static var last: NSException? | ||
| static var alreadySwizzled = false | ||
|
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| static func test_swizzleRaise() { | ||
| guard !alreadySwizzled else { return } | ||
|
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| let origin = class_getInstanceMethod(NSException.self, NSSelectorFromString("raise")) | ||
| let new = class_getInstanceMethod(NSException.self, NSSelectorFromString("test_raise")) | ||
|
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| if let origin = origin, let new = new { | ||
| method_exchangeImplementations(origin, new) | ||
| alreadySwizzled = true | ||
| } | ||
| } | ||
|
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| @objc func test_raise() { | ||
| NSException.last = self | ||
| } | ||
| } |