Add FoundationEssentials support

Author: x-sheep

Sources/PropertyBased/Date+String.swift

@@ -5,8 +5,12 @@
 //  Created by Lennard Sprong on 31/05/2025.
 //
 
-#if canImport(Foundation)
+#if canImport(FoundationEssentials)
+import FoundationEssentials
+#elseif canImport(Foundation)
 import Foundation
+#endif
+#if canImport(FoundationEssentials) || canImport(Foundation)
 
 extension Calendar {
     static var neutral: Calendar {

Sources/PropertyBased/FixedSeedTrait.swift

@@ -50,7 +50,7 @@ public struct FixedSeedTrait: TestTrait, TestScoping {
 }
 
 extension Trait where Self == FixedSeedTrait {
-    #if canImport(Foundation)
+    #if canImport(FoundationEssentials) || canImport(Foundation)
     /// Override the seed used by all property checks within this Test.
     ///
     /// If one of your property checks fails intermittently, apply this trait to reliably reproduce the issue.

Sources/PropertyBased/Gen+Date.swift

@@ -5,8 +5,12 @@
 //  Created by Lennard Sprong on 30/05/2025.
 //
 
-#if canImport(Foundation)
+#if canImport(FoundationEssentials)
+import FoundationEssentials
+#elseif canImport(Foundation)
 import Foundation
+#endif
+#if canImport(FoundationEssentials) || canImport(Foundation)
 
 // This value is a constant, to keep test runs reproducible.
 // This value may only be changed between package releases.

Sources/PropertyBased/Gen+Float.swift

@@ -122,8 +122,12 @@ extension Gen where Value == Float80 {
 }
 #endif
 
-#if canImport(Foundation)
+#if canImport(FoundationEssentials)
+import FoundationEssentials
+#elseif canImport(Foundation)
 import Foundation
+#endif
+#if canImport(FoundationEssentials) || canImport(Foundation)
 extension Gen where Value == CGFloat {
     /// Produces a generator of random floats within the specified range.
     ///

Sources/PropertyBased/Shrink+Date.swift

@@ -5,8 +5,12 @@
 //  Created by Lennard Sprong on 30/05/2025.
 //
 
-#if canImport(Foundation)
+#if canImport(FoundationEssentials)
+import FoundationEssentials
+#elseif canImport(Foundation)
 import Foundation
+#endif
+#if canImport(FoundationEssentials) || canImport(Foundation)
 
 extension Shrink {
     /// Shrink a TimeInterval by rounding to seconds, then minutes, then 15 minute intervals.

Sources/PropertyBased/Xoshiro.swift

@@ -49,8 +49,12 @@ extension Xoshiro: Hashable {
     }
 }
 
-#if canImport(Foundation)
+#if canImport(FoundationEssentials)
+import FoundationEssentials
+#elseif canImport(Foundation)
 import Foundation
+#endif
+#if canImport(FoundationEssentials) || canImport(Foundation)
 
 extension Xoshiro: SeededRandomNumberGenerator {
     public typealias Seed = String

Tests/PropertyBasedTests/GenTests+Date.swift

@@ -5,9 +5,14 @@
 //  Created by Lennard Sprong on 31/05/2025.
 //
 
-#if canImport(Foundation)
-import Testing
+#if canImport(FoundationEssentials)
+import FoundationEssentials
+#elseif canImport(Foundation)
 import Foundation
+#endif
+#if canImport(FoundationEssentials) || canImport(Foundation)
+
+import Testing
 import PropertyBased
 
 extension Calendar {

Tests/PropertyBasedTests/ShrinkTests+Date.swift

@@ -5,9 +5,14 @@
 //  Created by Lennard Sprong on 31/05/2025.
 //
 
-#if canImport(Foundation)
-import Testing
+#if canImport(FoundationEssentials)
+import FoundationEssentials
+#elseif canImport(Foundation)
 import Foundation
+#endif
+#if canImport(FoundationEssentials) || canImport(Foundation)
+
+import Testing
 @testable import PropertyBased
 
 @Suite struct ShrinkDateTests {