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//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2024 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 Swift project authors
//
import Testing
@testable import TestingMacros
import SwiftDiagnostics
import SwiftParser
import SwiftSyntax
import SwiftSyntaxBuilder
import SwiftSyntaxMacros
@Suite("TagMacro Tests")
struct TagMacroTests {
@Test("@Tag macro",
arguments: [
("extension Tag { @Tag static var x: Tag }", "Tag"),
("extension Tag { @Tag static var x: Self }", "Tag"),
("extension Testing.Tag { @Tag static var x: Testing.Tag }", "Testing.Tag"),
("extension Tag.A.B { @Tag static var x: Tag }", "Tag.A.B"),
("extension Testing.Tag.A.B { @Tag static var x: Tag }", "Testing.Tag.A.B"),
("extension Tag { struct S { @Tag static var x: Tag } }", "Tag.S"),
("extension Testing.Tag { enum E { @Tag static var x: Tag } }", "Testing.Tag.E"),
]
)
func tagMacro(input: String, typeName: String) throws {
let (output, diagnostics) = try parse(input)
#expect(diagnostics.count == 0)
#expect(output.contains("__fromStaticMember(of: \(typeName).self,"))
#expect(output.contains(#""x")"#))
}
@Test("Error diagnostics emitted on API misuse",
arguments: [
"@Tag struct S {}":
"Attribute 'Tag' cannot be applied to a structure",
"@Tag var x: Tag":
"Attribute 'Tag' cannot be applied to a global variable",
"@Tag nonisolated var x: Tag":
"Attribute 'Tag' cannot be applied to a global variable",
"@Tag static var x: Tag":
"Attribute 'Tag' cannot be applied to a global variable",
"extension Tag { @Tag var x: Tag }":
"Attribute 'Tag' cannot be applied to an instance property",
"extension Tag { @Tag nonisolated var x: Tag }":
"Attribute 'Tag' cannot be applied to an instance property",
"struct S { @Tag static var x: Tag }":
"Attribute 'Tag' cannot be applied to a property except in an extension to 'Tag'",
"extension Tag { @Tag static var x: String }":
"Attribute 'Tag' cannot be applied to a property of type 'String'",
"extension Tag.A.B { @Tag static var x: Self }":
"Attribute 'Tag' cannot be applied to a property of type 'Tag.A.B'",
]
)
func apiMisuseErrors(input: String, expectedMessage: String) throws {
let (_, diagnostics) = try parse(input)
#expect(diagnostics.count > 0)
for diagnostic in diagnostics {
#expect(diagnostic.diagMessage.severity == .error)
#expect(diagnostic.message == expectedMessage)
}
}
}
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