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

Sources/_InternalTestSupport/XCTAssertHelpers.swift

@@ -47,7 +47,7 @@ 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 isInPlatformCiEnvironment {
         let failureCause = reason ?? "Skipping because the test is being run on CI"
         throw XCTSkip(failureCause, file: file, line: line)
     }

Sources/_InternalTestSupport/misc.swift

@@ -39,7 +39,7 @@ import enum TSCUtility.Git
 @_exported import func TSCTestSupport.systemQuietly
 @_exported import enum TSCTestSupport.StringPattern
 
-public let isInCiEnvironment = ProcessInfo.processInfo.environment["SWIFTCI_USE_LOCAL_DEPS"] != nil
+public let isInPlatformCiEnvironment = ProcessInfo.processInfo.environment["SWIFTCI_USE_LOCAL_DEPS"] != nil
 public let isSelfHostedCiEnvironment = ProcessInfo.processInfo.environment["SWIFTCI_IS_SELF_HOSTED"] != nil
 
 public let isRealSigningIdentyEcLabelEnvVarSet =
@@ -53,6 +53,14 @@ 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/BasicsTests/Environment/EnvironmentTests.swift

@@ -147,7 +147,7 @@ struct EnvironmentTests {
 
     /// Important: This test is inherently race-prone, if it is proven to be
     /// flaky, it should run in a singled threaded environment/removed entirely.
-    @Test(.disabled(if: isInCiEnvironment, "This test can disrupt other tests running in parallel."))
+    @Test(.disabled(if: isInPlatformCiEnvironment, "This test can disrupt other tests running in parallel."))
     func makeCustomPathEnv() async throws {
         let customEnvironment: Environment = .current
         let origPath = customEnvironment[.path]

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))