Introduce ParserTestCase

This will allow overriding the default set of
experimental features. This diff is best viewed
with whitespace disabled.

Author: hamishknight

Tests/SwiftParserTest/AbsolutePositionTests.swift

@@ -15,7 +15,7 @@ import SwiftSyntax
 import SwiftParser
 import _SwiftSyntaxTestSupport
 
-public class AbsolutePositionTests: XCTestCase {
+public class AbsolutePositionTests: ParserTestCase {
   public func testTokenAt() {
     let source =
       """

Tests/SwiftParserTest/Assertions.swift

@@ -14,7 +14,7 @@
 @_spi(RawSyntax) import SwiftParser
 import XCTest
 
-final class AttributeTests: XCTestCase {
+final class AttributeTests: ParserTestCase {
   func testMissingArgumentToAttribute() {
     assertParse(
       """

Tests/SwiftParserTest/AttributeTests.swift

@@ -14,7 +14,7 @@
 @_spi(RawSyntax) import SwiftParser
 import XCTest
 
-final class AvailabilityTests: XCTestCase {
+final class AvailabilityTests: ParserTestCase {
   func testAvailableMember() {
     assertParse(
       """

Tests/SwiftParserTest/AvailabilityTests.swift

@@ -16,7 +16,7 @@ import SwiftSyntaxBuilder
 import SwiftBasicFormat
 import XCTest
 
-final class DeclarationTests: XCTestCase {
+final class DeclarationTests: ParserTestCase {
   func testImports() {
     assertParse("import Foundation")
 

Tests/SwiftParserTest/DeclarationTests.swift

@@ -14,7 +14,7 @@
 @_spi(RawSyntax) import SwiftParser
 import XCTest
 
-final class DirectiveTests: XCTestCase {
+final class DirectiveTests: ParserTestCase {
   func testSwitchIfConfig() {
     assertParse(
       """

Tests/SwiftParserTest/DirectiveTests.swift

@@ -14,7 +14,7 @@
 @_spi(RawSyntax) import SwiftParser
 import XCTest
 
-final class ExpressionTests: XCTestCase {
+final class ExpressionTests: ParserTestCase {
   func testTernary() {
     assertParse(
       "let a =1️⃣",
@@ -1474,7 +1474,7 @@ final class ExpressionTests: XCTestCase {
   }
 }
 
-final class MemberExprTests: XCTestCase {
+final class MemberExprTests: ParserTestCase {
   func testMissing() {
     let cases: [UInt: String] = [
       #line: "",
@@ -1494,7 +1494,7 @@ final class MemberExprTests: XCTestCase {
   }
 }
 
-final class StatementExpressionTests: XCTestCase {
+final class StatementExpressionTests: ParserTestCase {
   private func ifZeroElseOne() -> ExprSyntax {
     .init(
       IfExprSyntax(

Tests/SwiftParserTest/ExpressionTests.swift

@@ -13,7 +13,7 @@
 import SwiftSyntax
 import XCTest
 
-final class ExpressionTypeTests: XCTestCase {
+final class ExpressionTypeTests: ParserTestCase {
   func testTypeExpression() {
     assertParse("_ = (any Sequence<Int>).self")
   }

Tests/SwiftParserTest/ExpressionTypeTests.swift

@@ -15,7 +15,7 @@ import SwiftSyntax
 import SwiftParser
 import _SwiftSyntaxTestSupport
 
-public class IncrementalParsingTests: XCTestCase {
+public class IncrementalParsingTests: ParserTestCase {
 
   public func testBrokenMemberFunction() {
     assertIncrementalParse(

Tests/SwiftParserTest/IncrementalParsingTests.swift

@@ -60,7 +60,7 @@ fileprivate func assertRawBytesLexeme(
   XCTAssertEqual(lexeme.diagnostic, error, file: file, line: line)
 }
 
-public class LexerTests: XCTestCase {
+public class LexerTests: ParserTestCase {
   func testIdentifiers() {
     assertLexemes(
       "Hello World",

Tests/SwiftParserTest/LexerTests.swift

@@ -14,7 +14,7 @@
 import Darwin
 import XCTest
 
-final class LinkageTest: XCTestCase {
+final class LinkageTest: ParserTestCase {
   // Assert that SwiftSyntax and SwiftParser do not introduce more link-time
   // dependencies than are strictly necessary. We want to minimize our link-time
   // dependencies. If this set changes - in particular, if it grows - consult

Tests/SwiftParserTest/LinkageTests.swift

@@ -14,7 +14,7 @@ import SwiftSyntax
 import SwiftParser
 import XCTest
 
-public class EntryTests: XCTestCase {
+public class EntryTests: ParserTestCase {
   func testTopLevelStringParse() throws {
     let source = "func test() {}"
     let tree = Parser.parse(source: source)

Tests/SwiftParserTest/Parser+EntryTests.swift

@@ -0,0 +1,22 @@
+//===----------------------------------------------------------------------===//
+//
+// This source file is part of the Swift.org open source project
+//
+// Copyright (c) 2023 Apple Inc. and the Swift project authors
+// Licensed under Apache License v2.0 with Runtime Library Exception
+//
+// See https://swift.org/LICENSE.txt for license information
+// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
+//
+//===----------------------------------------------------------------------===//
+
+import XCTest
+import SwiftSyntax
+
+@_spi(ExperimentalLanguageFeatures) import SwiftParser
+
+/// The base class for all parser test cases.
+public class ParserTestCase: XCTestCase {
+  /// The default set of experimental features to test with.
+  var experimentalFeatures: Parser.ExperimentalFeatures { [] }
+}

Tests/SwiftParserTest/ParserTestCase.swift

@@ -17,7 +17,7 @@ import SwiftSyntax
 import SwiftParser
 import SwiftParserDiagnostics
 
-public class ParserTests: XCTestCase {
+public class ParserTests: ParserTestCase {
   /// Run a single parse test.
   func runParseTest(fileURL: URL, checkDiagnostics: Bool) throws {
     let fileContents = try Data(contentsOf: fileURL)

Tests/SwiftParserTest/ParserTests.swift

@@ -14,7 +14,7 @@
 @_spi(RawSyntax) import SwiftParser
 import XCTest
 
-final class PatternTests: XCTestCase {
+final class PatternTests: ParserTestCase {
   private var genericArgEnumPattern: Syntax {
     // let E<Int>.e(y)
     Syntax(

Tests/SwiftParserTest/PatternTests.swift

@@ -14,7 +14,7 @@
 @_spi(RawSyntax) import SwiftParser
 import XCTest
 
-final class RegexLiteralTests: XCTestCase {
+final class RegexLiteralTests: ParserTestCase {
   func testForwardSlash1() {
     assertParse(
       #"""

Tests/SwiftParserTest/RegexLiteralTests.swift

@@ -46,7 +46,7 @@ func verifySequentialToConcurrentTranslation(
   )
 }
 
-final class TranslateSequentialToConcurrentEditsTests: XCTestCase {
+final class TranslateSequentialToConcurrentEditsTests: ParserTestCase {
   func testEmpty() {
     verifySequentialToConcurrentTranslation([], [])
   }

Tests/SwiftParserTest/SequentialToConcurrentEditTranslationTests.swift

@@ -14,7 +14,7 @@
 @_spi(RawSyntax) import SwiftParser
 import XCTest
 
-final class StatementTests: XCTestCase {
+final class StatementTests: ParserTestCase {
   func testIf() {
     assertParse(
       """

Tests/SwiftParserTest/StatementTests.swift

@@ -19,7 +19,7 @@ import SwiftSyntaxBuilder
 ///
 /// Most tests are expressed by a single function call that compares the
 /// run-time String value against the parsed node's `representedLiteralValue`.
-public class StringLiteralRepresentedLiteralValueTests: XCTestCase {
+public class StringLiteralRepresentedLiteralValueTests: ParserTestCase {
 
   func testIntro() {
     test(

Tests/SwiftParserTest/StringLiteralRepresentedLiteralValueTests.swift

@@ -14,7 +14,7 @@ import XCTest
 import SwiftParser
 @_spi(SyntaxTransformVisitor) import SwiftSyntax
 
-final class SyntaxTransformVisitorTest: XCTestCase {
+final class SyntaxTransformVisitorTest: ParserTestCase {
   public func testFunctionCounter() {
     struct FuncCounter: SyntaxTransformVisitor {
       public func visitAny(_ node: Syntax) -> Int {

Tests/SwiftParserTest/SyntaxTransformVisitorTest.swift

@@ -14,7 +14,7 @@ import XCTest
 @_spi(RawSyntax) import SwiftSyntax
 @_spi(RawSyntax) @_spi(Testing) import SwiftParser
 
-final class TriviaParserTests: XCTestCase {
+final class TriviaParserTests: ParserTestCase {
 
   func testTriviaParsing() {
 

Tests/SwiftParserTest/TriviaParserTests.swift

@@ -14,7 +14,7 @@ import SwiftSyntax
 import SwiftParser
 import XCTest
 
-final class TypeCompositionTests: XCTestCase {
+final class TypeCompositionTests: ParserTestCase {
   func testComponents() {
     let cases: [UInt: String] = [
       // Identifiers and member types

Tests/SwiftParserTest/TypeCompositionTests.swift

@@ -14,7 +14,7 @@ import SwiftSyntax
 import SwiftParser
 import XCTest
 
-final class TypeMemberTests: XCTestCase {
+final class TypeMemberTests: ParserTestCase {
   func testKeyword() {
     assertParse(
       "MyType.class",

Tests/SwiftParserTest/TypeMemberTests.swift

@@ -14,7 +14,7 @@ import SwiftSyntax
 import SwiftParser
 import XCTest
 
-final class TypeMetatypeTests: XCTestCase {
+final class TypeMetatypeTests: ParserTestCase {
   func testBaseType() {
     let cases: [UInt: String] = [
       // Identifiers and member types

Tests/SwiftParserTest/TypeMetatypeTests.swift

@@ -14,7 +14,7 @@
 @_spi(RawSyntax) import SwiftParser
 import XCTest
 
-final class TypeTests: XCTestCase {
+final class TypeTests: ParserTestCase {
   func testMissingColonInType() {
     assertParse(
       """

Tests/SwiftParserTest/TypeTests.swift

@@ -13,7 +13,7 @@
 import SwiftSyntax
 import XCTest
 
-final class VariadicGenericsTests: XCTestCase {
+final class VariadicGenericsTests: ParserTestCase {
   func testSimpleForwarding() {
     assertParse(
       """
@@ -297,7 +297,7 @@ final class VariadicGenericsTests: XCTestCase {
   }
 }
 
-final class TypeParameterPackTests: XCTestCase {
+final class TypeParameterPackTests: ParserTestCase {
   func testParameterPacks1() {
     assertParse(
       """

Tests/SwiftParserTest/VariadicGenericsTests.swift

@@ -14,7 +14,7 @@
 
 import XCTest
 
-final class ActorTests: XCTestCase {
+final class ActorTests: ParserTestCase {
   func testActor1() {
     assertParse(
       """

Tests/SwiftParserTest/translated/ActorTests.swift

@@ -14,7 +14,7 @@
 
 import XCTest
 
-final class AlwaysEmitConformanceMetadataAttrTests: XCTestCase {
+final class AlwaysEmitConformanceMetadataAttrTests: ParserTestCase {
   func testAlwaysEmitConformanceMetadataAttr() {
     assertParse(
       """

Tests/SwiftParserTest/translated/AlwaysEmitConformanceMetadataAttrTests.swift

@@ -14,7 +14,7 @@
 
 import XCTest
 
-final class AsyncSyntaxTests: XCTestCase {
+final class AsyncSyntaxTests: ParserTestCase {
   func testAsyncSyntax1() {
     assertParse(
       """

Tests/SwiftParserTest/translated/AsyncSyntaxTests.swift

@@ -14,7 +14,7 @@
 
 import XCTest
 
-final class AsyncTests: XCTestCase {
+final class AsyncTests: ParserTestCase {
   func testAsync1() {
     assertParse(
       """

Tests/SwiftParserTest/translated/AsyncTests.swift

@@ -14,7 +14,7 @@
 
 import XCTest
 
-final class AvailabilityQueryTests: XCTestCase {
+final class AvailabilityQueryTests: ParserTestCase {
   func testAvailabilityQuery1() {
     assertParse(
       """

Tests/SwiftParserTest/translated/AvailabilityQueryTests.swift

@@ -14,7 +14,7 @@
 
 import XCTest
 
-final class AvailabilityQueryUnavailabilityTests: XCTestCase {
+final class AvailabilityQueryUnavailabilityTests: ParserTestCase {
   func testAvailabilityQueryUnavailability1() {
     assertParse(
       """

Tests/SwiftParserTest/translated/AvailabilityQueryUnavailabilityTests.swift

@@ -14,7 +14,7 @@
 
 import XCTest
 
-final class BorrowExprTests: XCTestCase {
+final class BorrowExprTests: ParserTestCase {
   func testBorrowExpr1() {
     assertParse(
       """

Tests/SwiftParserTest/translated/BorrowExprTests.swift

@@ -14,7 +14,7 @@
 
 import XCTest
 
-final class BraceRecoveryEofTests: XCTestCase {
+final class BraceRecoveryEofTests: ParserTestCase {
   func testBraceRecoveryEof1() {
     assertParse(
       """

Tests/SwiftParserTest/translated/BraceRecoveryEofTests.swift

@@ -14,7 +14,7 @@
 
 import XCTest
 
-final class BuiltinBridgeObjectTests: XCTestCase {
+final class BuiltinBridgeObjectTests: ParserTestCase {
   func testBuiltinBridgeObject1() {
     assertParse(
       """

Tests/SwiftParserTest/translated/BuiltinBridgeObjectTests.swift

@@ -14,7 +14,7 @@
 
 import XCTest
 
-final class BuiltinWordTests: XCTestCase {
+final class BuiltinWordTests: ParserTestCase {
   func testBuiltinWord1() {
     assertParse(
       """

Tests/SwiftParserTest/translated/BuiltinWordTests.swift

@@ -14,7 +14,7 @@
 
 import XCTest
 
-final class ConflictMarkersTests: XCTestCase {
+final class ConflictMarkersTests: ParserTestCase {
   func testConflictMarkers1() {
     assertParse(
       """

Tests/SwiftParserTest/translated/ConflictMarkersTests.swift

@@ -14,7 +14,7 @@
 
 import XCTest
 
-final class ConsecutiveStatementsTests: XCTestCase {
+final class ConsecutiveStatementsTests: ParserTestCase {
   func testSimple1() {
     assertParse(
       "let x = 21️⃣ let y = 3",

Tests/SwiftParserTest/translated/ConsecutiveStatementsTests.swift

@@ -14,7 +14,7 @@
 
 import XCTest
 
-final class CopyExprTests: XCTestCase {
+final class CopyExprTests: ParserTestCase {
   func testGlobal() {
     assertParse(
       """

Tests/SwiftParserTest/translated/CopyExprTests.swift

@@ -14,7 +14,7 @@
 
 import XCTest
 
-final class DebuggerTests: XCTestCase {
+final class DebuggerTests: ParserTestCase {
   func testDebugger1() {
     assertParse(
       """