Convert some tests BasicsTests to Swift Testing

Convert some BasicsTests from XCTest to Swift Testing to make use of
parallelism and, in some cases, test parameterization.

Not all Test Suites in BasicsTests have been converted as some use helpers
in swift-tools-core-support, which don't have a matching swift testing
helper.

Author: bkhouri

Package.swift

@@ -788,7 +788,12 @@ let package = Package(
 
         .testTarget(
             name: "BasicsTests",
-            dependencies: ["Basics", "_InternalTestSupport", "tsan_utils"],
+            dependencies: [
+                "Basics",
+                "_InternalTestSupport",
+                "tsan_utils",
+               .product(name: "Numerics", package: "swift-numerics"),
+            ],
             exclude: [
                 "Archiver/Inputs/archive.tar.gz",
                 "Archiver/Inputs/archive.zip",
@@ -1028,6 +1033,8 @@ if ProcessInfo.processInfo.environment["SWIFTCI_USE_LOCAL_DEPS"] == nil {
         .package(url: "https://github.com/apple/swift-collections.git", "1.0.1" ..< "1.2.0"),
         .package(url: "https://github.com/apple/swift-certificates.git", "1.0.1" ..< "1.6.0"),
         .package(url: "https://github.com/swiftlang/swift-toolchain-sqlite.git", from: "1.0.0"),
+        // Test Dependencies
+        .package(url: "https://github.com/apple/swift-numerics", exact: "1.0.2")
     ]
 } else {
     package.dependencies += [
@@ -1040,6 +1047,8 @@ if ProcessInfo.processInfo.environment["SWIFTCI_USE_LOCAL_DEPS"] == nil {
         .package(path: "../swift-collections"),
         .package(path: "../swift-certificates"),
         .package(path: "../swift-toolchain-sqlite"),
+        // Test Dependencies
+        .package(path: "../swift-numerics"),
     ]
 }
 

Sources/_InternalTestSupport/Observability.swift

@@ -14,10 +14,10 @@ import Basics
 import func XCTest.XCTAssertTrue
 import func XCTest.XCTAssertEqual
 import func XCTest.XCTFail
-
 import struct TSCBasic.StringError
 
 import TSCTestSupport
+import Testing
 
 extension ObservabilitySystem {
     public static func makeForTesting(verbose: Bool = true) -> TestingObservability {
@@ -139,6 +139,39 @@ public func testDiagnostics(
     }
 }
 
+
+public func expectDiagnostics(
+    _ diagnostics: [Basics.Diagnostic],
+    problemsOnly: Bool = true,
+    sourceLocation: SourceLocation = #_sourceLocation,
+    handler: (DiagnosticsTestResult) throws -> Void
+) throws {
+    try expectDiagnostics(
+        diagnostics,
+        minSeverity: problemsOnly ? .warning : .debug,
+        sourceLocation: sourceLocation,
+        handler: handler
+    )
+}
+
+
+public func expectDiagnostics(
+    _ diagnostics: [Basics.Diagnostic],
+    minSeverity: Basics.Diagnostic.Severity,
+    sourceLocation: SourceLocation = #_sourceLocation,
+    handler: (DiagnosticsTestResult) throws -> Void
+) throws {
+    let diagnostics = diagnostics.filter { $0.severity >= minSeverity }
+    let testResult = DiagnosticsTestResult(diagnostics)
+
+    try handler(testResult)
+
+    if !testResult.uncheckedDiagnostics.isEmpty {
+        Issue.record("unchecked diagnostics \(testResult.uncheckedDiagnostics)", sourceLocation: sourceLocation)
+    }
+}
+
+
 public func testPartialDiagnostics(
     _ diagnostics: [Basics.Diagnostic],
     minSeverity: Basics.Diagnostic.Severity,

Sources/_InternalTestSupport/XCTAssertHelpers.swift

@@ -44,8 +44,12 @@ public func XCTAssertEqual<T:Equatable, U:Equatable> (_ lhs:(T,U), _ rhs:(T,U),
     TSCTestSupport.XCTAssertEqual(lhs, rhs, file: file, line: line)
 }
 
+public func isRunninginCI(file: StaticString = #filePath, line: UInt = #line) -> Bool {
+    return (ProcessInfo.processInfo.environment["SWIFTCI_USE_LOCAL_DEPS"] != nil || ProcessInfo.processInfo.environment["CI"] != nil)
+}
+
 public func XCTSkipIfCI(file: StaticString = #filePath, line: UInt = #line) throws {
-    if ProcessInfo.processInfo.environment["SWIFTCI_USE_LOCAL_DEPS"] != nil {
+    if isRunninginCI() {
         throw XCTSkip("Skipping because the test is being run on CI", file: file, line: line)
     }
 }

Tests/BasicsTests/Archiver/ZipArchiverTests.swift

@@ -105,44 +105,44 @@ final class ZipArchiverTests: XCTestCase {
         #endif
 
          try await testWithTemporaryDirectory { tmpdir in
-             let archiver = ZipArchiver(fileSystem: localFileSystem)
+            let archiver = ZipArchiver(fileSystem: localFileSystem)
 
-             let rootDir = tmpdir.appending(component: UUID().uuidString)
-             try localFileSystem.createDirectory(rootDir)
-             try localFileSystem.writeFileContents(rootDir.appending("file1.txt"), string: "Hello World!")
+            let rootDir = tmpdir.appending(component: UUID().uuidString)
+            try localFileSystem.createDirectory(rootDir)
+            try localFileSystem.writeFileContents(rootDir.appending("file1.txt"), string: "Hello World!")
 
-             let dir1 = rootDir.appending("dir1")
-             try localFileSystem.createDirectory(dir1)
-             try localFileSystem.writeFileContents(dir1.appending("file2.txt"), string: "Hello World 2!")
+            let dir1 = rootDir.appending("dir1")
+            try localFileSystem.createDirectory(dir1)
+            try localFileSystem.writeFileContents(dir1.appending("file2.txt"), string: "Hello World 2!")
 
              let dir2 = dir1.appending("dir2")
              try localFileSystem.createDirectory(dir2)
              try localFileSystem.writeFileContents(dir2.appending("file3.txt"), string: "Hello World 3!")
              try localFileSystem.writeFileContents(dir2.appending("file4.txt"), string: "Hello World 4!")
              try localFileSystem.createSymbolicLink(dir2.appending("file5.txt"), pointingAt: dir1.appending("file2.txt"), relative: true)
 
-             let archivePath = tmpdir.appending(component: UUID().uuidString + ".zip")
-             try await archiver.compress(directory: rootDir, to: archivePath)
-             XCTAssertFileExists(archivePath)
-
-             let extractRootDir = tmpdir.appending(component: UUID().uuidString)
-             try localFileSystem.createDirectory(extractRootDir)
-             try await archiver.extract(from: archivePath, to: extractRootDir)
-             try localFileSystem.stripFirstLevel(of: extractRootDir)
-
-             XCTAssertFileExists(extractRootDir.appending("file1.txt"))
-             XCTAssertEqual(
-                 try? localFileSystem.readFileContents(extractRootDir.appending("file1.txt")),
-                 "Hello World!"
-             )
-
-             let extractedDir1 = extractRootDir.appending("dir1")
-             XCTAssertDirectoryExists(extractedDir1)
-             XCTAssertFileExists(extractedDir1.appending("file2.txt"))
-             XCTAssertEqual(
-                 try? localFileSystem.readFileContents(extractedDir1.appending("file2.txt")),
-                 "Hello World 2!"
-             )
+            let archivePath = tmpdir.appending(component: UUID().uuidString + ".zip")
+            try await archiver.compress(directory: rootDir, to: archivePath)
+            XCTAssertFileExists(archivePath)
+
+            let extractRootDir = tmpdir.appending(component: UUID().uuidString)
+            try localFileSystem.createDirectory(extractRootDir)
+            try await archiver.extract(from: archivePath, to: extractRootDir)
+            try localFileSystem.stripFirstLevel(of: extractRootDir)
+
+            XCTAssertFileExists(extractRootDir.appending("file1.txt"))
+            XCTAssertEqual(
+                try? localFileSystem.readFileContents(extractRootDir.appending("file1.txt")),
+                "Hello World!"
+            )
+
+            let extractedDir1 = extractRootDir.appending("dir1")
+            XCTAssertDirectoryExists(extractedDir1)
+            XCTAssertFileExists(extractedDir1.appending("file2.txt"))
+            XCTAssertEqual(
+                try? localFileSystem.readFileContents(extractedDir1.appending("file2.txt")),
+                "Hello World 2!"
+            )
 
              let extractedDir2 = extractedDir1.appending("dir2")
              XCTAssertDirectoryExists(extractedDir2)