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CwlCatchBadInstructionTests.swift
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CwlCatchBadInstructionTests.swift
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//
// CwlCatchBadInstructionTests.swift
// CwlPreconditionTesting
//
// Created by Matt Gallagher on 2016/01/10.
// Copyright © 2016 Matt Gallagher ( https://www.cocoawithlove.com ). All rights reserved.
//
// Permission to use, copy, modify, and/or distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice appear in all copies.
//
// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
// SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR
// IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
//
import Foundation
import Swift
import XCTest
import CwlPosixPreconditionTesting
import CwlPreconditionTesting
class CatchBadInstructionTests: XCTestCase {
func testCatchBadInstruction() {
#if os(macOS) || os(iOS) || os(visionOS)
// Test catching an assertion failure
var reachedPoint1 = false
var reachedPoint2 = false
let exception1: CwlPreconditionTesting.BadInstructionException? = CwlPreconditionTesting.catchBadInstruction {
// Must invoke this block
reachedPoint1 = true
// Fatal error raised
precondition(false, "THIS PRECONDITION FAILURE IS EXPECTED")
// Exception must be thrown so that this point is never reached
reachedPoint2 = true
}
// We must get a valid BadInstructionException
XCTAssert(exception1 != nil)
XCTAssert(reachedPoint1)
XCTAssert(!reachedPoint2)
// Test without catching an assertion failure
var reachedPoint3 = false
let exception2: CwlPreconditionTesting.BadInstructionException? = CwlPreconditionTesting.catchBadInstruction {
// Must invoke this block
reachedPoint3 = true
}
// We must not get a BadInstructionException without an assertion
XCTAssert(reachedPoint3)
XCTAssert(exception2 == nil)
#endif
}
func testPosixCatchBadInstruction() {
// Test catching an assertion failure
var reachedPoint1 = false
var reachedPoint2 = false
let exception1: CwlPosixPreconditionTesting.BadInstructionException? = CwlPosixPreconditionTesting.catchBadInstruction {
// Must invoke this block
reachedPoint1 = true
// Fatal error raised
precondition(false, "THIS PRECONDITION FAILURE IS EXPECTED")
// Exception must be thrown so that this point is never reached
reachedPoint2 = true
}
// We must get a valid BadInstructionException
XCTAssert(exception1 != nil)
XCTAssert(reachedPoint1)
XCTAssert(!reachedPoint2)
// Test without catching an assertion failure
var reachedPoint3 = false
let exception2: CwlPosixPreconditionTesting.BadInstructionException? = CwlPosixPreconditionTesting.catchBadInstruction {
// Must invoke this block
reachedPoint3 = true
}
// We must not get a BadInstructionException without an assertion
XCTAssert(reachedPoint3)
XCTAssert(exception2 == nil)
}
}