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//===----------------------------------------------------------------------===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2014 - 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 SwiftSyntax
import XCTest
class SyntaxTests: XCTestCase {
public func testHasError() {
XCTAssertTrue(TokenSyntax.keyword(.func, presence: .missing).hasError)
XCTAssertFalse(TokenSyntax.keyword(.func, presence: .present).hasError)
XCTAssertTrue(UnexpectedNodesSyntax([]).hasError)
XCTAssertTrue(MissingExprSyntax().hasError)
XCTAssertFalse(CodeBlockItemListSyntax([]).hasError)
XCTAssertTrue(
FunctionDeclSyntax(
funcKeyword: TokenSyntax.keyword(.func, presence: .missing),
name: .identifier("foo"),
signature: FunctionSignatureSyntax(parameterClause: FunctionParameterClauseSyntax(parameters: []))
).hasError
)
XCTAssertFalse(
FunctionDeclSyntax(
funcKeyword: TokenSyntax.keyword(.func, presence: .present),
name: .identifier("foo"),
signature: FunctionSignatureSyntax(parameterClause: FunctionParameterClauseSyntax(parameters: []))
).hasError
)
}
public func testDetached() {
let s = StructDeclSyntax(
structKeyword: .keyword(.struct),
name: .identifier("someStruct"),
memberBlock: MemberBlockSyntax(leftBrace: .leftBraceToken(), members: [], rightBrace: .rightBraceToken())
)
XCTAssertEqual(Syntax(s), s.memberBlock.parent)
XCTAssertNil(s.memberBlock.detached.parent)
}
public func testCasting() {
let integerExpr = IntegerLiteralExprSyntax(
literal: .integerLiteral("1", trailingTrivia: .space)
)
let expr = ExprSyntax(integerExpr)
let node = Syntax(expr)
XCTAssertTrue(expr.is(IntegerLiteralExprSyntax.self))
XCTAssertTrue(node.is(IntegerLiteralExprSyntax.self))
XCTAssertTrue(node.as(ExprSyntax.self)!.is(IntegerLiteralExprSyntax.self))
XCTAssertTrue(node.isProtocol(ExprSyntaxProtocol.self))
XCTAssertTrue(node.asProtocol(ExprSyntaxProtocol.self) is IntegerLiteralExprSyntax)
XCTAssertTrue(expr.asProtocol(ExprSyntaxProtocol.self) is IntegerLiteralExprSyntax)
XCTAssertTrue(expr.asProtocol(ExprSyntaxProtocol.self) as? IntegerLiteralExprSyntax == integerExpr)
XCTAssertFalse(node.isProtocol(BracedSyntax.self))
XCTAssertNil(node.asProtocol(BracedSyntax.self))
XCTAssertFalse(expr.isProtocol(BracedSyntax.self))
XCTAssertNil(expr.asProtocol(BracedSyntax.self))
let classDecl = CodeBlockSyntax(
leftBrace: TokenSyntax.leftBraceToken(),
statements: CodeBlockItemListSyntax([]),
rightBrace: TokenSyntax.rightBraceToken()
)
XCTAssertTrue(classDecl.isProtocol(BracedSyntax.self))
XCTAssertNotNil(classDecl.asProtocol(BracedSyntax.self))
let optNode: Syntax? = node
switch optNode?.as(SyntaxEnum.self) {
case .integerLiteralExpr: break
default: XCTFail("failed to convert to SyntaxEnum")
}
switch expr.as(ExprSyntaxEnum.self) {
case .integerLiteralExpr: break
default: XCTFail("failed to convert to ExprSyntaxEnum")
}
XCTAssertNil(ExprSyntax(nil as IntegerLiteralExprSyntax?))
XCTAssertEqual(ExprSyntax(integerExpr).as(IntegerLiteralExprSyntax.self)!, integerExpr)
}
public func testNodeType() {
let integerExpr = IntegerLiteralExprSyntax(
literal: TokenSyntax.integerLiteral("1", trailingTrivia: .space)
)
let expr = ExprSyntax(integerExpr)
let node = Syntax(expr)
XCTAssertTrue(integerExpr.syntaxNodeType == expr.syntaxNodeType)
XCTAssertTrue(integerExpr.syntaxNodeType == node.syntaxNodeType)
XCTAssertEqual("\(integerExpr.syntaxNodeType)", "IntegerLiteralExprSyntax")
}
public func testConstructFromSyntaxProtocol() {
let integerExpr = IntegerLiteralExprSyntax(
literal: .integerLiteral("1", trailingTrivia: .space)
)
XCTAssertEqual(Syntax(integerExpr), Syntax(fromProtocol: integerExpr as SyntaxProtocol))
XCTAssertEqual(Syntax(integerExpr), Syntax(fromProtocol: integerExpr as ExprSyntaxProtocol))
}
public func testPositions() {
let leading = Trivia(pieces: [.spaces(2)])
let trailing = Trivia(pieces: [.spaces(1)])
let funcKW = TokenSyntax.keyword(
.func,
leadingTrivia: leading,
trailingTrivia: trailing
)
XCTAssertEqual("\(funcKW)", " func ")
XCTAssertEqual(funcKW.position, AbsolutePosition(utf8Offset: 0))
XCTAssertEqual(funcKW.positionAfterSkippingLeadingTrivia, AbsolutePosition(utf8Offset: 2))
XCTAssertEqual(funcKW.endPositionBeforeTrailingTrivia, AbsolutePosition(utf8Offset: 6))
XCTAssertEqual(funcKW.endPosition, AbsolutePosition(utf8Offset: 7))
XCTAssertEqual(funcKW.trimmedLength, SourceLength(utf8Length: 4))
}
public func testEnumCaseParameterSyntaxConvenienceInit() {
let noFirstName = EnumCaseParameterSyntax(type: TypeSyntax("MyType"))
XCTAssertEqual(noFirstName.formatted().description, "MyType")
let node = EnumCaseParameterSyntax(firstName: "label", type: TypeSyntax("MyType"))
XCTAssertEqual(node.formatted().description, "label: MyType")
}
public func testClosureCaptureSyntaxConvenienceInitWithEqual() {
let noNameClosureCapture = ClosureCaptureSyntax(expression: ExprSyntax("123"))
XCTAssertEqual(noNameClosureCapture.formatted().description, "123")
let node = ClosureCaptureSyntax(name: "test", expression: ExprSyntax("123"))
XCTAssertEqual(node.formatted().description, "test = 123")
}
func testShareSyntaxIndexInTreeBetweenTrees() throws {
let source = "func foo() {}"
let tree1 = DeclSyntax(stringLiteral: source)
let tree2 = DeclSyntax(stringLiteral: source)
let funcKeywordInTree1 = try XCTUnwrap(tree1.firstToken(viewMode: .sourceAccurate))
XCTAssertEqual(funcKeywordInTree1.tokenKind, .keyword(.func))
let opaqueIndexInTree1 = funcKeywordInTree1.id.indexInTree.toOpaque()
let funcKeywordIdentifierInTree2 = try XCTUnwrap(
SyntaxIdentifier.fromIndexInTree(
SyntaxIdentifier.SyntaxIndexInTree(fromOpaque: opaqueIndexInTree1),
relativeToRoot: tree2
)
)
let funcKeywordInTree2 = tree2.node(at: funcKeywordIdentifierInTree2)
XCTAssertEqual(funcKeywordInTree2?.as(TokenSyntax.self)?.tokenKind, .keyword(.func))
XCTAssertNotEqual(funcKeywordInTree1.id, funcKeywordInTree2?.id)
}
}
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