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
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
|
//===----------------------------------------------------------------------===//
//
// 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 MacroExamplesImplementation
import SwiftSyntaxMacros
import SwiftSyntaxMacrosTestSupport
import XCTest
final class AddCompletionHandlerMacroTests: XCTestCase {
private let macros = ["AddCompletionHandler": AddCompletionHandlerMacro.self]
func testExpansionTransformsAsyncFunctionToCompletion() {
assertMacroExpansion(
"""
@AddCompletionHandler
func f(a: Int, for b: String, _ value: Double) async -> String {
return b
}
""",
expandedSource: """
func f(a: Int, for b: String, _ value: Double) async -> String {
return b
}
func f(a: Int, for b: String, _ value: Double, completionHandler: @escaping (String) -> Void) {
Task {
completionHandler(await f(a: a, for: b, value))
}
}
""",
macros: macros,
indentationWidth: .spaces(2)
)
}
func testExpansionOnStoredPropertyEmitsError() {
assertMacroExpansion(
"""
struct Test {
@AddCompletionHandler
var value: Int
}
""",
expandedSource: """
struct Test {
var value: Int
}
""",
diagnostics: [
DiagnosticSpec(
message: "@addCompletionHandler only works on functions",
line: 2,
column: 3,
severity: .error
)
],
macros: macros,
indentationWidth: .spaces(2)
)
}
func testExpansionOnNonAsyncFunctionEmitsErrorWithFixItSuggestion() {
assertMacroExpansion(
"""
struct Test {
@AddCompletionHandler
func fetchData() -> String {
return "Hello, World!"
}
}
""",
expandedSource: """
struct Test {
func fetchData() -> String {
return "Hello, World!"
}
}
""",
diagnostics: [
DiagnosticSpec(
message: "can only add a completion-handler variant to an 'async' function",
line: 3,
column: 3,
severity: .error,
fixIts: [FixItSpec(message: "add 'async'")]
)
],
macros: macros,
indentationWidth: .spaces(2)
)
}
func testExpansionOnNonAsyncFunctionAppliesFixIt() {
assertMacroExpansion(
"""
struct Test {
@AddCompletionHandler
func fetchData() -> String {
return "Hello, World!"
}
}
""",
expandedSource: """
struct Test {
func fetchData() -> String {
return "Hello, World!"
}
}
""",
diagnostics: [
DiagnosticSpec(
message: "can only add a completion-handler variant to an 'async' function",
line: 3,
column: 3,
severity: .error,
fixIts: [FixItSpec(message: "add 'async'")]
)
],
macros: macros,
applyFixIts: ["add 'async'"],
fixedSource: """
struct Test {
@AddCompletionHandler
func fetchData() async -> String {
return "Hello, World!"
}
}
""",
indentationWidth: .spaces(2)
)
}
}
|
