Fix some bugs around SWT_NO_* conditionals. (#386)

Author: grynspan

Sources/Testing/EntryPoints/EntryPoint.swift

@@ -376,7 +376,7 @@ private func _eventHandlerForStreamingEvents_v0(toFileAtPath path: String) throw
       byte == 10 || byte == 13
     }
 
-#if DEBUG
+#if DEBUG && !SWT_NO_FILE_IO
     // We don't actually expect the JSON encoder to produce output containing
     // newline characters, so in debug builds we'll log a diagnostic message.
     if eventAndContextJSON.contains(where: isASCIINewline) {

Sources/Testing/EntryPoints/XCTestScaffold.swift

@@ -116,6 +116,7 @@ public enum XCTestScaffold: Sendable {
 #endif
   public static func runAllTests(hostedBy testCase: XCTestCase, _ functionName: String = #function) async {
 #if SWIFT_PM_SUPPORTS_SWIFT_TESTING
+#if !SWT_NO_FILE_IO
     let message = Event.ConsoleOutputRecorder.warning(
       "This version of Swift Package Manager supports running swift-testing tests directly. Ignoring call to \(#function).",
       options: .for(.stderr)
@@ -125,6 +126,7 @@ public enum XCTestScaffold: Sendable {
 #else
     print(message)
 #endif
+#endif
 #else
     let testCase = UncheckedSendable(rawValue: testCase)
 #if SWT_TARGET_OS_APPLE

Tests/TestingMacrosTests/ConditionMacroTests.swift

@@ -331,6 +331,7 @@ struct ConditionMacroTests {
     #expect(diagnostics.isEmpty)
   }
 
+#if !SWT_NO_EXIT_TESTS
   @Test("Expectation inside an exit test diagnoses",
     arguments: [
       "#expectExitTest(exitsWith: .failure) { #expect(1 > 2) }",
@@ -344,6 +345,7 @@ struct ConditionMacroTests {
     #expect(diagnostic.message.contains("record an issue"))
     #expect(diagnostic.message.contains("(exitsWith:"))
   }
+#endif
 
   @Test("Macro expansion is performed within a test function")
   func macroExpansionInTestFunction() throws {

Tests/TestingTests/_Testing_Foundation/FoundationTests.swift

@@ -8,7 +8,7 @@
 // See https://swift.org/CONTRIBUTORS.txt for Swift project authors
 //
 
-#if canImport(Foundation)
+#if canImport(Foundation) && !SWT_NO_UTC_CLOCK
 @testable @_spi(Experimental) @_spi(ForToolsIntegrationOnly) import _Testing_Foundation
 @_spi(Experimental) @_spi(ForToolsIntegrationOnly) import Testing
 import Foundation