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import XCTest
@testable import WIT
class ParseFunctionDeclTests: XCTestCase {
func parse(_ text: String) throws -> ResourceFunctionSyntax {
var lexer = Lexer(cursor: .init(input: text))
return try ResourceFunctionSyntax.parse(
lexer: &lexer,
documents: DocumentsSyntax(comments: []),
attributes: []
)
}
func testFunction() throws {
var lexer = Lexer(cursor: .init(input: "func(x: u8) -> u16"))
let f = try FunctionSyntax.parse(lexer: &lexer)
XCTAssertEqual(f.parameters.count, 1)
guard case .anon(.u16) = f.results else {
XCTFail("expected anon but got \(f.results)")
return
}
}
func testFunctionNamedReturn() throws {
var lexer = Lexer(cursor: .init(input: "func() -> (a: u8, b: u16)"))
let f = try FunctionSyntax.parse(lexer: &lexer)
guard case .named(let results) = f.results else {
XCTFail("expected anon but got \(f.results)")
return
}
XCTAssertEqual(results.count, 2)
}
func testResourceFunction() throws {
let f = try parse("%foo: func() -> bool")
guard case .method(let method) = f else {
XCTFail("expected method but got \(f)")
return
}
XCTAssertEqual(method.name.text, "foo")
}
func testResourceFunctionStatic() throws {
let f = try parse("foo: static func() -> bool")
guard case .static(let method) = f else {
XCTFail("expected method but got \(f)")
return
}
XCTAssertEqual(method.name.text, "foo")
}
func testResourceFunctionConstructor() throws {
let f = try parse("constructor(a: u8, b: u16)")
guard case .constructor(let ctor) = f else {
XCTFail("expected method but got \(f)")
return
}
XCTAssertEqual(ctor.name.text, "constructor")
XCTAssertEqual(ctor.function.parameters.count, 2)
}
}
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