1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
|
//===----------------------------------------------------------*- swift -*-===//
//
// This source file is part of the Swift Argument Parser open source project
//
// Copyright (c) 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
//
//===----------------------------------------------------------------------===//
import XCTest
@testable import ArgumentParser
final class MirrorTests: XCTestCase {}
extension MirrorTests {
private struct Foo {
let foo: String?
let bar: String
let baz: String!
}
func testRealValue() {
func checkChildValue(_ child: Mirror.Child, expectedString: String?) {
if let expectedString = expectedString {
guard let stringValue = child.value as? String else {
XCTFail("child.value is not a String type")
return
}
XCTAssertEqual(stringValue, expectedString)
} else {
XCTAssertNil(nilOrValue(child.value))
// This is why we use `unwrapedOptionalValue` for optionality checks
// Even though the `value` is `nil` this returns `false`
XCTAssertFalse(child.value as Any? == nil)
}
}
func performTest(foo: String?, baz: String!) {
let fooChild = Foo(foo: foo, bar: "foobar", baz: baz)
Mirror(reflecting: fooChild).children.forEach { child in
switch child.label {
case "foo":
checkChildValue(child, expectedString: foo)
case "bar":
checkChildValue(child, expectedString: "foobar")
case "baz":
checkChildValue(child, expectedString: baz)
default:
XCTFail("Unexpected child")
}
}
}
performTest(foo: "foo", baz: "baz")
performTest(foo: "foo", baz: nil)
performTest(foo: nil, baz: "baz")
performTest(foo: nil, baz: nil)
}
}
|
