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Make EventLoopPromise conform to Equatable #2714

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merged 3 commits into from
Jul 31, 2024
Merged

Make EventLoopPromise conform to Equatable #2714

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60abb70
Make EventLoopPromise conform to Equatable
gjcairo May 3, 2024
a2f2037
Add tests
gjcairo Jun 21, 2024
75e3f7e
Merge branch 'main' into elp-equatable
gjcairo Jul 31, 2024
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2 changes: 2 additions & 0 deletions Sources/NIOCore/EventLoopFuture.swift
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Original file line number Diff line number Diff line change
Expand Up @@ -256,6 +256,8 @@ public struct EventLoopPromise<Value> {
}
}

extension EventLoopPromise: Equatable {}

/// Holder for a result that will be provided later.
///
/// Functions that promise to do work asynchronously can return an `EventLoopFuture<Value>`.
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43 changes: 43 additions & 0 deletions Tests/NIOPosixTests/EventLoopFutureTest.swift
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Expand Up @@ -1601,4 +1601,47 @@ class EventLoopFutureTest: XCTestCase {
XCTAssertNotNil(promise)
promise?.succeed()
}

func testPromiseEquatable() {
let eventLoop = EmbeddedEventLoop()

let promise1 = eventLoop.makePromise(of: Void.self)
let promise2 = eventLoop.makePromise(of: Void.self)
let promise3 = promise1
XCTAssertEqual(promise1, promise3)
XCTAssertNotEqual(promise1, promise2)
XCTAssertNotEqual(promise3, promise2)

promise1.succeed()
promise2.succeed()
}

func testPromiseEquatable_WhenSucceeded() {
let eventLoop = EmbeddedEventLoop()

let promise1 = eventLoop.makePromise(of: Void.self)
let promise2 = eventLoop.makePromise(of: Void.self)
let promise3 = promise1

promise1.succeed()
promise2.succeed()
XCTAssertEqual(promise1, promise3)
XCTAssertNotEqual(promise1, promise2)
XCTAssertNotEqual(promise3, promise2)
}

func testPromiseEquatable_WhenFailed() {
struct E: Error {}
let eventLoop = EmbeddedEventLoop()

let promise1 = eventLoop.makePromise(of: Void.self)
let promise2 = eventLoop.makePromise(of: Void.self)
let promise3 = promise1

promise1.fail(E())
promise2.fail(E())
XCTAssertEqual(promise1, promise3)
XCTAssertNotEqual(promise1, promise2)
XCTAssertNotEqual(promise3, promise2)
}
}
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