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Adds Optional.publisher as a convenience for Optional.Publisher.init. (…
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,19 @@ | ||
| // | ||
| // Optional.swift | ||
| // CombineExt | ||
| // | ||
| // Created by Jasdev Singh on 11/05/2020. | ||
| // Copyright © 2020 Combine Community. All rights reserved. | ||
| // | ||
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| #if canImport(Combine) | ||
| import Combine | ||
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| @available(OSX 10.15, iOS 13.0, tvOS 13.0, watchOS 6.0, *) | ||
| public extension Optional { | ||
| /// A publisher that publishes an optional value to each subscriber exactly once, if the optional has a value. | ||
| var publisher: Optional.Publisher { | ||
| Optional.Publisher(self) | ||
| } | ||
| } | ||
| #endif |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,44 @@ | ||
| // | ||
| // OptionalTests.swift | ||
| // CombineExt | ||
| // | ||
| // Created by Jasdev Singh on 11/05/2020. | ||
| // Copyright © 2020 Combine Community. All rights reserved. | ||
| // | ||
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| #if !os(watchOS) | ||
| import Combine | ||
| import CombineExt | ||
| import XCTest | ||
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| @available(OSX 10.15, iOS 13.0, tvOS 13.0, watchOS 6.0, *) | ||
| final class OptionalTests: XCTestCase { | ||
| private var subscription: AnyCancellable! | ||
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| func testSomeInitialization() { | ||
| var results = [Int]() | ||
| var completion: Subscribers.Completion<Never>? | ||
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| subscription = Optional(1) | ||
| .publisher | ||
| .sink(receiveCompletion: { completion = $0 }, | ||
| receiveValue: { results.append($0) }) | ||
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| XCTAssertEqual([1], results) | ||
| XCTAssertEqual(.finished, completion) | ||
| } | ||
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| func testNoneInitialization() { | ||
| var results = [Int]() | ||
| var completion: Subscribers.Completion<Never>? | ||
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| subscription = Optional<Int>.none | ||
| .publisher | ||
| .sink(receiveCompletion: { completion = $0 }, | ||
| receiveValue: { results.append($0) }) | ||
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| XCTAssertTrue(results.isEmpty) | ||
| XCTAssertEqual(.finished, completion) | ||
| } | ||
| } | ||
| #endif |
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