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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
import _SwiftSyntaxTestSupport
fileprivate func intElement(_ int: Int) -> ArrayElementSyntax {
let literal = TokenSyntax.integerLiteral("\(int)")
return ArrayElementSyntax(
expression: IntegerLiteralExprSyntax(literal: literal),
trailingComma: .commaToken()
)
}
fileprivate func assertSyntaxCollectionManipulation(
initialElements: [Int],
transformation: (_ array: inout ArrayExprSyntax) -> Void,
expectedElements: [Int],
file: StaticString = #filePath,
line: UInt = #line
) {
var modifiedArray = ArrayExprSyntax {
for initialElement in initialElements {
intElement(initialElement)
}
}
transformation(&modifiedArray)
let expectedArray = ArrayExprSyntax {
for expectedElement in expectedElements {
intElement(expectedElement)
}
}
do {
let subtreeMatcher = SubtreeMatcher(modifiedArray, markers: [:])
try subtreeMatcher.assertSameStructure(
expectedArray,
includeTrivia: true,
file: file,
line: line
)
} catch {
XCTFail("Matching for a subtree failed with error: \(error)", file: file, line: line)
}
}
class SyntaxCollectionsTests: XCTestCase {
public func testAppendElement() {
assertSyntaxCollectionManipulation(
initialElements: [0],
transformation: {
$0.elements.append(intElement(1))
},
expectedElements: [0, 1]
)
}
public func testAppendMultipleElement() {
assertSyntaxCollectionManipulation(
initialElements: [0],
transformation: {
$0.elements.append(contentsOf: [intElement(1), intElement(2)])
},
expectedElements: [0, 1, 2]
)
}
public func testInsertElement() {
assertSyntaxCollectionManipulation(
initialElements: [0, 1, 2],
transformation: {
let index = $0.elements.startIndex
$0.elements.insert(intElement(5), at: index)
},
expectedElements: [5, 0, 1, 2]
)
assertSyntaxCollectionManipulation(
initialElements: [0, 1, 2],
transformation: {
let index = $0.elements.index(at: 1)
$0.elements.insert(intElement(5), at: index)
},
expectedElements: [0, 5, 1, 2]
)
assertSyntaxCollectionManipulation(
initialElements: [0, 1, 2],
transformation: {
let index = $0.elements.endIndex
$0.elements.insert(intElement(5), at: index)
},
expectedElements: [0, 1, 2, 5]
)
}
public func testInsertMultipleElements() {
assertSyntaxCollectionManipulation(
initialElements: [0, 1, 2],
transformation: {
let index = $0.elements.startIndex
$0.elements.insert(contentsOf: [intElement(5), intElement(6)], at: index)
},
expectedElements: [5, 6, 0, 1, 2]
)
assertSyntaxCollectionManipulation(
initialElements: [0, 1, 2],
transformation: {
let index = $0.elements.index(at: 1)
$0.elements.insert(contentsOf: [intElement(5), intElement(6)], at: index)
},
expectedElements: [0, 5, 6, 1, 2]
)
assertSyntaxCollectionManipulation(
initialElements: [0, 1, 2],
transformation: {
let index = $0.elements.endIndex
$0.elements.insert(contentsOf: [intElement(5), intElement(6)], at: index)
},
expectedElements: [0, 1, 2, 5, 6]
)
}
public func testRemoveElement() {
assertSyntaxCollectionManipulation(
initialElements: [0, 1, 2],
transformation: {
let index = $0.elements.startIndex
$0.elements.remove(at: index)
},
expectedElements: [1, 2]
)
assertSyntaxCollectionManipulation(
initialElements: [0, 1, 2],
transformation: {
let index = $0.elements.index(at: 1)
$0.elements.remove(at: index)
},
expectedElements: [0, 2]
)
assertSyntaxCollectionManipulation(
initialElements: [0, 1, 2],
transformation: {
let index = $0.elements.index(at: 2)
$0.elements.remove(at: index)
},
expectedElements: [0, 1]
)
}
public func testRemoveSubrange() {
assertSyntaxCollectionManipulation(
initialElements: [0, 1, 2],
transformation: {
let startIndex = $0.elements.startIndex
let endIndex = $0.elements.index(at: 1)
$0.elements.removeSubrange(startIndex..<endIndex)
},
expectedElements: [1, 2]
)
assertSyntaxCollectionManipulation(
initialElements: [0, 1, 2],
transformation: {
let startIndex = $0.elements.startIndex
let endIndex = $0.elements.index(at: 2)
$0.elements.removeSubrange(startIndex..<endIndex)
},
expectedElements: [2]
)
assertSyntaxCollectionManipulation(
initialElements: [0, 1, 2],
transformation: {
let startIndex = $0.elements.startIndex
let endIndex = $0.elements.endIndex
$0.elements.removeSubrange(startIndex..<endIndex)
},
expectedElements: []
)
}
public func testAddSequenceAtEnd() {
assertSyntaxCollectionManipulation(
initialElements: [0],
transformation: {
let newElements = (1...2).lazy.map({ intElement($0) })
$0.elements = $0.elements + newElements
},
expectedElements: [0, 1, 2]
)
}
public func testAddArrayAtEnd() {
assertSyntaxCollectionManipulation(
initialElements: [0],
transformation: {
let newElements = [intElement(1), intElement(2)]
$0.elements = $0.elements + newElements
},
expectedElements: [0, 1, 2]
)
}
public func testAddSequenceAtStart() {
assertSyntaxCollectionManipulation(
initialElements: [0],
transformation: {
let newElements = (1...2).lazy.map({ intElement($0) })
$0.elements = newElements + $0.elements
},
expectedElements: [1, 2, 0]
)
}
public func testAddArrayAtStart() {
assertSyntaxCollectionManipulation(
initialElements: [0],
transformation: {
let newElements = [intElement(1), intElement(2)]
$0.elements = newElements + $0.elements
},
expectedElements: [1, 2, 0]
)
}
func testPlusEquals() {
assertSyntaxCollectionManipulation(
initialElements: [0],
transformation: {
let newElements = [intElement(1), intElement(2)]
$0.elements += newElements
},
expectedElements: [0, 1, 2]
)
}
public func testFilter() {
let elements = ArrayElementListSyntax([
intElement(0),
intElement(1),
intElement(2),
])
let array = ArrayExprSyntax(elements: elements)
let filteredElements = array.elements.filter { _ in true }
// The filtered sequence should have the `ArrayExprSyntax` as a parent
XCTAssert(filteredElements.parent?.is(ArrayExprSyntax.self) ?? false)
}
}
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