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//===----------------------------------------------------------------------===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2014 - 2025 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
//
//===----------------------------------------------------------------------===//
@_spi(Testing) import SwiftFormat
import SwiftParser
import SwiftSyntax
import XCTest
@_spi(Testing) import _SwiftFormatTestSupport
final class WhitespaceLinterPerformanceTests: DiagnosingTestCase {
/// When executing in Swift CI, run the block to make sure it doesn't hit any assertions because we don't look at
/// performance numbers in CI and CI nodes can have variable performance characteristics if they are not bare-metal.
///
/// Anywhere else, run XCTest's `measure` function to measure the performance of the block.
private func measureIfNotInCI(_ block: () -> Void) {
if ProcessInfo.processInfo.environment["SWIFTCI_USE_LOCAL_DEPS"] != nil {
block()
} else {
measure { block() }
}
}
func testWhitespaceLinterPerformance() throws {
let input = String(
repeating: """
import SomeModule
public class SomeClass : SomeProtocol
{
var someProperty : SomeType {
get{5}set{doSomething()}
}
public
func
someFunctionName
(
firstArg : FirstArgument , secondArg :
SecondArgument){
doSomeThings()
}}
""",
count: 20
)
let expected = String(
repeating: """
import SomeModule
public class SomeClass: SomeProtocol {
var someProperty: SomeType {
get { 5 }
set { doSomething() }
}
public func someFunctionName(
firstArg: FirstArgument,
secondArg: SecondArgument
) {
doSomeThings()
}
}
""",
count: 20
)
measureIfNotInCI { performWhitespaceLint(input: input, expected: expected) }
}
/// Perform whitespace linting by comparing the input text from the user with the expected
/// formatted text, using the default configuration.
///
/// - Parameters:
/// - input: The user's input text.
/// - expected: The formatted text.
private func performWhitespaceLint(input: String, expected: String) {
let sourceFileSyntax = Parser.parse(source: input)
let context = makeContext(
sourceFileSyntax: sourceFileSyntax,
selection: .infinite,
findingConsumer: { _ in }
)
let linter = WhitespaceLinter(user: input, formatted: expected, context: context)
linter.lint()
}
}
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