Tests: Convert Run Command Tests to Swift Testing

Convert the Run Command Tests to Swift Testing.

Make use of parameterized tests to reduce duplication and use
withKnownIssue to get signal when tests have been fixed.

Author: bkhouri

IntegrationTests/Sources/IntegrationTestSupport/Helpers.swift

@@ -123,7 +123,7 @@ public let swiftTest: AbsolutePath = swiftpmBinaryDirectory.appending(component:
 
 public let swiftRun: AbsolutePath = swiftpmBinaryDirectory.appending(component: "swift-run")
 
-public let isSelfHosted: Bool = {
+public let runningInSelfHostedPipeline: Bool = {
     ProcessInfo.processInfo.environment["SWIFTCI_IS_SELF_HOSTED"] != nil
 }()
 

Sources/_InternalTestSupport/XCTAssertHelpers.swift

@@ -48,7 +48,7 @@ public func XCTAssertEqual<T:Equatable, U:Equatable> (_ lhs:(T,U), _ rhs:(T,U),
 
 public func XCTSkipIfPlatformCI(because reason: String? = nil, file: StaticString = #filePath, line: UInt = #line) throws {
     // TODO: is this actually the right variable now?
-    if isInCiEnvironment {
+    if CiEnvironment.runningInSmokeTestPipeline {
         let failureCause = reason ?? "Skipping because the test is being run on CI"
         throw XCTSkip(failureCause, file: file, line: line)
     }

Sources/_InternalTestSupport/misc.swift

@@ -63,6 +63,14 @@ public let isRealSigningIdentitTestDefined = {
     #endif
 }()
 
+public let duplicateSymbolRegex: Regex<AnyRegexOutput>? = {
+    do {
+        return try Regex(".*One of the duplicates must be removed or renamed.")
+    } catch {
+        return nil
+    }
+}()
+
 /// Test helper utility for executing a block with a temporary directory.
 public func testWithTemporaryDirectory(
     function: StaticString = #function,

Tests/CommandsTests/BuildCommandTests.swift

@@ -193,7 +193,7 @@ struct BuildCommandTestCases {
         arguments: SupportedBuildSystemOnPlatform,
     )
     func commandDoesNotEmitDuplicateSymbols(buildSystem: BuildSystemProvider.Kind) async throws {
-        let duplicateSymbolRegex = try Regex(".*One of the duplicates must be removed or renamed.")
+        let duplicateSymbolRegex = try #require(duplicateSymbolRegex)
         let (stdout, stderr) = try await execute(["--help"], buildSystem: buildSystem)
         #expect(!stdout.contains(duplicateSymbolRegex))
         #expect(!stderr.contains(duplicateSymbolRegex))