Experimental SwiftWasm support

.github/workflows/wasm.yml

@@ -0,0 +1,17 @@
+name: SwiftWasm
+
+on:
+  pull_request:
+    paths:
+      - .github/workflows/wasm.yml
+  schedule:
+    - cron: "0 0 * * 1"
+  workflow_dispatch:
+
+jobs:
+  test:
+    name: Test SwiftWasm
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: swiftwasm/swiftwasm-action@v5.3

Sources/Nimble/Adapters/NMBExpectation.swift

@@ -1,3 +1,5 @@
+#if !os(WASI)
+
 #if canImport(Darwin) && !SWIFT_PACKAGE
 import class Foundation.NSObject
 import typealias Foundation.TimeInterval
@@ -150,3 +152,5 @@ public class NMBExpectation: NSObject {
 }
 
 #endif
+
+#endif // #if !os(WASI)

Sources/Nimble/Adapters/NimbleEnvironment.swift

@@ -1,10 +1,15 @@
+#if !os(WASI)
 import Dispatch
-import class Foundation.NSObject
 import class Foundation.Thread
+#endif
+import class Foundation.NSObject
 
 /// "Global" state of Nimble is stored here. Only DSL functions should access / be aware of this
 /// class' existence
 internal class NimbleEnvironment: NSObject {
+    #if os(WASI)
+    static var activeInstance: NimbleEnvironment = NimbleEnvironment()
+    #else
     static var activeInstance: NimbleEnvironment {
         get {
             let env = Thread.current.threadDictionary["NimbleEnvironment"]
@@ -20,6 +25,7 @@ internal class NimbleEnvironment: NSObject {
             Thread.current.threadDictionary["NimbleEnvironment"] = newValue
         }
     }
+    #endif
 
     // swiftlint:disable:next todo
     // TODO: eventually migrate the global to this environment value
@@ -29,15 +35,19 @@ internal class NimbleEnvironment: NSObject {
     }
 
     var suppressTVOSAssertionWarning: Bool = false
+    #if !os(WASI)
     var awaiter: Awaiter
+    #endif
 
     override init() {
+        #if !os(WASI)
         let timeoutQueue = DispatchQueue.global(qos: .userInitiated)
         awaiter = Awaiter(
             waitLock: AssertionWaitLock(),
             asyncQueue: .main,
             timeoutQueue: timeoutQueue
         )
+        #endif
 
         super.init()
     }

Sources/Nimble/DSL+Wait.swift

@@ -1,3 +1,5 @@
+#if !os(WASI)
+
 import Dispatch
 import Foundation
 
@@ -117,3 +119,5 @@ internal func blockedRunLoopErrorMessageFor(_ fnName: String, leeway: DispatchTi
 public func waitUntil(timeout: DispatchTimeInterval = AsyncDefaults.timeout, file: FileString = #file, line: UInt = #line, action: @escaping (@escaping () -> Void) -> Void) {
     NMBWait.until(timeout: timeout, file: file, line: line, action: action)
 }
+
+#endif // #if !os(WASI)

Sources/Nimble/Matchers/Async.swift

@@ -1,3 +1,5 @@
+#if !os(WASI)
+
 import Foundation
 import Dispatch
 
@@ -180,3 +182,5 @@ extension Expectation {
         return toNever(predicate, until: until, pollInterval: pollInterval, description: description)
     }
 }
+
+#endif // #if !os(WASI)

Sources/Nimble/Matchers/BeginWith.swift

@@ -17,12 +17,12 @@ public func beginWith(_ startingElement: Any) -> Predicate<NMBOrderedCollection>
     return Predicate.simple("begin with <\(startingElement)>") { actualExpression in
         guard let collection = try actualExpression.evaluate() else { return .fail }
         guard collection.count > 0 else { return .doesNotMatch }
-        #if os(Linux)
+        #if os(macOS) || os(iOS) || os(tvOS) || os(watchOS)
+            let collectionValue = collection.object(at: 0) as AnyObject
+        #else
             guard let collectionValue = collection.object(at: 0) as? NSObject else {
                 return .fail
             }
-        #else
-            let collectionValue = collection.object(at: 0) as AnyObject
         #endif
         return PredicateStatus(bool: collectionValue.isEqual(startingElement))
     }

Sources/Nimble/Matchers/EndWith.swift

@@ -25,12 +25,12 @@ public func endWith(_ endingElement: Any) -> Predicate<NMBOrderedCollection> {
         guard let collection = try actualExpression.evaluate() else { return .fail }
 
         guard collection.count > 0 else { return PredicateStatus(bool: false) }
-        #if os(Linux)
+        #if os(macOS) || os(iOS) || os(tvOS) || os(watchOS)
+            let collectionValue = collection.object(at: collection.count - 1) as AnyObject
+        #else
             guard let collectionValue = collection.object(at: collection.count - 1) as? NSObject else {
                 return .fail
             }
-        #else
-            let collectionValue = collection.object(at: collection.count - 1) as AnyObject
         #endif
 
         return PredicateStatus(bool: collectionValue.isEqual(endingElement))

Sources/Nimble/Matchers/MatcherProtocols.swift

@@ -46,13 +46,15 @@ public protocol NMBDoubleConvertible {
 extension NSNumber: NMBDoubleConvertible {
 }
 
+#if !os(WASI)
 private let dateFormatter: DateFormatter = {
     let formatter = DateFormatter()
     formatter.dateFormat = "yyyy-MM-dd HH:mm:ss.SSSS"
     formatter.locale = Locale(identifier: "en_US_POSIX")
 
     return formatter
 }()
+#endif
 
 extension Date: NMBDoubleConvertible {
     public var doubleValue: CDouble {
@@ -66,6 +68,7 @@ extension NSDate: NMBDoubleConvertible {
     }
 }
 
+#if !os(WASI)
 extension Date: TestOutputStringConvertible {
     public var testDescription: String {
         return dateFormatter.string(from: self)
@@ -77,6 +80,7 @@ extension NSDate: TestOutputStringConvertible {
         return dateFormatter.string(from: Date(timeIntervalSinceReferenceDate: self.timeIntervalSinceReferenceDate))
     }
 }
+#endif
 
 #if canImport(Darwin)
 /// Protocol for types to support beLessThan(), beLessThanOrEqualTo(),

Sources/Nimble/Matchers/PostNotification.swift

@@ -1,3 +1,5 @@
+#if !os(WASI)
+
 #if canImport(Foundation)
 import Foundation
 
@@ -97,4 +99,6 @@ public func postDistributedNotifications<Out>(
 }
 #endif
 
-#endif
+#endif // #if canImport(Foundation)
+
+#endif // #if !os(WASI)

Sources/Nimble/Utils/Await.swift

@@ -1,3 +1,5 @@
+#if !os(WASI)
+
 import CoreFoundation
 import Dispatch
 import Foundation
@@ -369,3 +371,5 @@ internal func pollBlock(
 
         return result
 }
+
+#endif // #if !os(WASI)

Sources/Nimble/Utils/DispatchTimeInterval.swift

@@ -1,3 +1,5 @@
+#if !os(WASI)
+
 import Dispatch
 
 #if canImport(CDispatch)
@@ -39,3 +41,5 @@ extension TimeInterval {
     }
 }
 #endif
+
+#endif // #if !os(WASI)

Tests/NimbleTests/AsynchronousTest.swift

@@ -1,3 +1,5 @@
+#if !os(WASI)
+
 import Dispatch
 import CoreFoundation
 import Foundation
@@ -283,3 +285,5 @@ final class AsyncTest: XCTestCase {
         }
     }
 }
+
+#endif // #if !os(WASI)

Tests/NimbleTests/Helpers/utils.swift

@@ -1,4 +1,6 @@
+#if !os(WASI)
 import Dispatch
+#endif
 import Foundation
 @testable import Nimble
 import XCTest
@@ -64,12 +66,14 @@ func failsWithErrorMessageForNil(_ message: String, file: FileString = #file, li
     failsWithErrorMessage("\(message) (use beNil() to match nils)", file: file, line: line, preferOriginalSourceLocation: preferOriginalSourceLocation, closure: closure)
 }
 
+#if !os(WASI)
 func deferToMainQueue(action: @escaping () -> Void) {
     DispatchQueue.main.async {
         Thread.sleep(forTimeInterval: 0.01)
         action()
     }
 }
+#endif
 
 #if canImport(Darwin) && !SWIFT_PACKAGE
 public class NimbleHelper: NSObject {
@@ -87,6 +91,7 @@ public class NimbleHelper: NSObject {
 }
 #endif
 
+#if !os(WASI)
 extension Date {
     init(dateTimeString: String) {
         let dateFormatter = DateFormatter()
@@ -103,3 +108,4 @@ extension NSDate {
         self.init(timeIntervalSinceReferenceDate: date.timeIntervalSinceReferenceDate)
     }
 }
+#endif

Tests/NimbleTests/Matchers/BeCloseToTest.swift

@@ -40,6 +40,7 @@ final class BeCloseToTest: XCTestCase {
         }
     }
 
+    #if !os(WASI)
     func testBeCloseToWithDate() {
         expect(Date(dateTimeString: "2015-08-26 11:43:00")).to(beCloseTo(Date(dateTimeString: "2015-08-26 11:43:05"), within: 10))
 
@@ -58,6 +59,7 @@ final class BeCloseToTest: XCTestCase {
             expect(NSDate(dateTimeString: "2015-08-26 11:43:00")).toNot(beCloseTo(expectedDate, within: 0.006))
         }
     }
+    #endif
 
     func testBeCloseToOperator() {
         expect(1.2) ≈ 1.2001
@@ -92,6 +94,7 @@ final class BeCloseToTest: XCTestCase {
         }
     }
 
+    #if !os(WASI)
     func testBeCloseToOperatorWithDate() {
         expect(Date(dateTimeString: "2015-08-26 11:43:00")) ≈ Date(dateTimeString: "2015-08-26 11:43:00")
 
@@ -128,6 +131,7 @@ final class BeCloseToTest: XCTestCase {
             expect(Date(dateTimeString: "2015-08-26 11:43:00")) == expectedDate ± 0.004
         }
     }
+    #endif // #if !os(WASI)
 
     func testBeCloseToArray() {
         expect([0.0, 1.1, 2.2]) ≈ [0.0001, 1.1001, 2.2001]

Tests/NimbleTests/Matchers/PostNotificationTest.swift

@@ -1,3 +1,5 @@
+#if !os(WASI)
+
 import XCTest
 import Nimble
 import Foundation
@@ -79,3 +81,5 @@ final class PostNotificationTest: XCTestCase {
     }
     #endif
 }
+
+#endif // #if !os(WASI)

Tests/NimbleTests/UserDescriptionTest.swift

@@ -35,6 +35,7 @@ final class UserDescriptionTest: XCTestCase {
         }
     }
 
+    #if !os(WASI)
     func testToEventuallyMatch_CustomFailureMessage() {
         failsWithErrorMessage(
             """
@@ -67,5 +68,6 @@ final class UserDescriptionTest: XCTestCase {
             expect { 1 }.toEventuallyNot(equal(1), description: "These are eventually equal!")
         }
     }
+    #endif // #if !os(WASI)
 
 }