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//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2025 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
//
@testable @_spi(Experimental) @_spi(ForToolsIntegrationOnly) import Testing
#if canImport(Foundation)
private import Foundation
#endif
@Suite("Test.Case Tests")
struct Test_CaseTests {
@Test func nonParameterized() throws {
let testCase = Test.Case(body: {})
#expect(testCase.id.argumentIDs == nil)
#expect(testCase.id.discriminator == nil)
}
@Test func singleStableArgument() throws {
let testCase = Test.Case(
values: [1],
parameters: [Test.Parameter(index: 0, firstName: "x", type: Int.self)],
body: {}
)
#expect(testCase.id.isStable)
}
@Test func twoStableArguments() throws {
let testCase = Test.Case(
values: [1, "a"],
parameters: [
Test.Parameter(index: 0, firstName: "x", type: Int.self),
Test.Parameter(index: 1, firstName: "y", type: String.self),
],
body: {}
)
#expect(testCase.id.isStable)
}
@Test("Two arguments: one non-stable, followed by one stable")
func nonStableAndStableArgument() throws {
let testCase = Test.Case(
values: [NonCodable(), IssueRecordingEncodable()],
parameters: [
Test.Parameter(index: 0, firstName: "x", type: NonCodable.self),
Test.Parameter(index: 1, firstName: "y", type: IssueRecordingEncodable.self),
],
body: {}
)
#expect(!testCase.id.isStable)
}
@Suite("Test.Case.ID Tests")
struct IDTests {
#if canImport(Foundation)
@Test(arguments: [
Test.Case.ID(argumentIDs: nil, discriminator: nil, isStable: true),
Test.Case.ID(argumentIDs: [.init(bytes: "x".utf8)], discriminator: 0, isStable: false),
Test.Case.ID(argumentIDs: [.init(bytes: #""abc""#.utf8)], discriminator: 0, isStable: true),
])
func roundTripping(id: Test.Case.ID) throws {
#expect(try JSON.encodeAndDecode(id) == id)
}
@Test func legacyDecoding_stable() throws {
let encodedData = Data("""
{"argumentIDs": [
{"bytes": [1]}
]}
""".utf8)
let testCaseID = try JSON.decode(Test.Case.ID.self, from: encodedData)
#expect(testCaseID.isStable)
let argumentIDs = try #require(testCaseID.argumentIDs)
#expect(argumentIDs.count == 1)
}
@Test func legacyDecoding_nonStable() throws {
let encodedData = Data("{}".utf8)
let testCaseID = try JSON.decode(Test.Case.ID.self, from: encodedData)
#expect(!testCaseID.isStable)
let argumentIDs = try #require(testCaseID.argumentIDs)
#expect(argumentIDs.count == 1)
}
@Test func legacyDecoding_nonParameterized() throws {
let encodedData = Data(#"{"argumentIDs": []}"#.utf8)
let testCaseID = try JSON.decode(Test.Case.ID.self, from: encodedData)
#expect(testCaseID.isStable)
#expect(testCaseID.argumentIDs == nil)
#expect(testCaseID.discriminator == nil)
}
@Test func newDecoding_nonParameterized() throws {
let encodedData = Data(#"{"isStable": true}"#.utf8)
let testCaseID = try JSON.decode(Test.Case.ID.self, from: encodedData)
#expect(testCaseID.isStable)
#expect(testCaseID.argumentIDs == nil)
#expect(testCaseID.discriminator == nil)
}
@Test func newDecoding_parameterizedStable() throws {
let encodedData = Data("""
{
"isStable": true,
"argIDs": [
{"bytes": [1]}
],
"discriminator": 0
}
""".utf8)
let testCaseID = try JSON.decode(Test.Case.ID.self, from: encodedData)
#expect(testCaseID.isStable)
#expect(testCaseID.argumentIDs?.count == 1)
#expect(testCaseID.discriminator == 0)
}
@Test func newEncoding_nonParameterized() throws {
let id = Test.Case.ID(argumentIDs: nil, discriminator: nil, isStable: true)
let legacyID = try JSON.withEncoding(of: id) { data in
try JSON.decode(_LegacyTestCaseID.self, from: data)
}
let argumentIDs = try #require(legacyID.argumentIDs)
#expect(argumentIDs.isEmpty)
}
@Test func newEncoding_parameterizedNonStable() throws {
let id = Test.Case.ID(
argumentIDs: [.init(bytes: "x".utf8)],
discriminator: 0,
isStable: false
)
let legacyID = try JSON.withEncoding(of: id) { data in
try JSON.decode(_LegacyTestCaseID.self, from: data)
}
#expect(legacyID.argumentIDs == nil)
}
@Test func newEncoding_parameterizedStable() throws {
let id = Test.Case.ID(
argumentIDs: [.init(bytes: #""abc""#.utf8)],
discriminator: 0,
isStable: true
)
let legacyID = try JSON.withEncoding(of: id) { data in
try JSON.decode(_LegacyTestCaseID.self, from: data)
}
let argumentIDs = try #require(legacyID.argumentIDs)
#expect(argumentIDs.count == 1)
let argumentID = try #require(argumentIDs.first)
#expect(String(decoding: argumentID.bytes, as: UTF8.self) == #""abc""#)
}
#endif
}
}
// MARK: - Fixtures, helpers
private struct NonCodable {}
private struct IssueRecordingEncodable: Encodable {
func encode(to encoder: any Encoder) throws {
Issue.record("Unexpected attempt to encode an instance of \(Self.self)")
}
}
/// A fixture type which implements legacy decoding for ``Test/Case/ID``.
private struct _LegacyTestCaseID: Decodable {
var argumentIDs: [Test.Case.Argument.ID]?
}
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