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//===-------------- ExpectedCompilations.swift - Swift Testing -------------===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2014 - 2021 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 TSCBasic
/// The `Source`s expected to be compiled in a `Step`, when incremental imports are either enabled or disabled.
public struct ExpectedCompilations {
let whenEnabled: Set<Source>
let whenDisabled: Set<Source>
private init(whenEnabled: Set<Source>, whenDisabled: Set<Source>) {
self.whenEnabled = whenEnabled
self.whenDisabled = whenDisabled
}
/// Create an `ExpectedCompilations`
/// - Parameters:
/// - always: The sources to expect whether incremental imports are enabled or not
/// - andWhenDisabled: The additional sources to expect when incremental imports are disabled
/// - Returns: An `ExpctecCompilations`
public init(always: [Source], andWhenDisabled: [Source] = []) {
self.init(whenEnabled: Set(always),
whenDisabled: Set(always + andWhenDisabled))
}
public init(allSourcesOf modules: [Module]) {
self.init(always: modules.flatMap {$0.sources})
}
/// Creates an `IncrementalImports` that expects no compilations.
public static let none = Self(always: [])
/// Check the actual compilations against what `self` expects.
/// Fails an `XCTest assertion` with a somewhat wordy message of things are not hunky-dory.
/// - Parameters:
/// - against: The actual compiled sources to check against.
/// - step: The `Step` that changed the source, ran the compiler, and needs to check the results.
/// - in: The context of this test.
func check(against actuals: [Source], step: Step, in context: Context) {
let expectedSet = Set(expected(when: context.incrementalImports))
let actualsSet = Set(actuals)
let extraCompilations = actualsSet.subtracting(expectedSet).map {$0.name}.sorted()
let missingCompilations = expectedSet.subtracting( actualsSet).map {$0.name}.sorted()
XCTAssert(extraCompilations.isEmpty,
"Extra compilations: \(extraCompilations), \(context.failMessage(step))",
file: context.file, line: context.line)
XCTAssert(missingCompilations.isEmpty,
"Missing compilations: \(missingCompilations), \(context.failMessage(step))",
file: context.file, line: context.line)
}
private func expected(when incrementalImports: Context.IncrementalImports) -> Set<Source> {
switch incrementalImports {
case .enabled: return whenEnabled
case .disabled: return whenDisabled
}
}
}
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