Files
data-lite-coder/Tests/DLCDecoderTests/UnkeyedContainerTests.swift

734 lines
22 KiB
Swift

import XCTest
import DataLiteCore
import DLCCommon
@testable import DLCDecoder
final class UnkeyedContainerTests: XCTestCase {
func testDecodeNil() {
XCTAssertThrowsError(try container().decodeNil()) {
checkIsAtEnd($0, Optional<Any>.self)
}
let nilContainer = container(withData: .null)
XCTAssertEqual(
nilContainer.currentIndex, 0,
"Expected index to be 0 before decoding nil"
)
XCTAssertTrue(
try nilContainer.decodeNil(),
"Expected decodeNil() to return true"
)
XCTAssertEqual(
nilContainer.currentIndex, 1,
"Expected index to increment after decoding nil"
)
let notNilContainer = container(withData: .text("value"))
XCTAssertFalse(
try notNilContainer.decodeNil(),
"Expected decodeNil() to return false for non-nil value"
)
XCTAssertEqual(
notNilContainer.currentIndex, 0,
"Expected index to remain unchanged for non-nil value"
)
}
func testDecodeBool() {
XCTAssertThrowsError(try container().decode(Bool.self)) {
checkIsAtEnd($0, Bool.self)
}
let trueContainer = container(withData: .int(1))
XCTAssertEqual(
trueContainer.currentIndex, 0,
"Expected index to be 0 before decoding true"
)
XCTAssertTrue(
try trueContainer.decode(Bool.self),
"Expected decode(Bool.self) to return true"
)
XCTAssertEqual(
trueContainer.currentIndex, 1,
"Expected index to increment after decoding true"
)
let falseContainer = container(withData: .int(0))
XCTAssertEqual(
falseContainer.currentIndex, 0,
"Expected index to be 0 before decoding false"
)
XCTAssertFalse(
try falseContainer.decode(Bool.self),
"Expected decode(Bool.self) to return false"
)
XCTAssertEqual(
falseContainer.currentIndex, 1,
"Expected index to increment after decoding false"
)
}
func testDecodeString() {
XCTAssertThrowsError(try container().decode(String.self)) {
checkIsAtEnd($0, String.self)
}
let container = container(withData: .text("Hello, SQLite!"))
XCTAssertEqual(
container.currentIndex, 0,
"Expected index to be 0 before decoding string"
)
XCTAssertEqual(
try container.decode(String.self), "Hello, SQLite!",
"Expected decoded value to match original string"
)
XCTAssertEqual(
container.currentIndex, 1,
"Expected index to increment after decoding string"
)
}
func testDecodeDouble() {
XCTAssertThrowsError(try container().decode(Double.self)) {
checkIsAtEnd($0, Double.self)
}
let container = container(withData: .real(3.14))
XCTAssertEqual(
container.currentIndex, 0,
"Expected index to be 0 before decoding double"
)
XCTAssertEqual(
try container.decode(Double.self), 3.14,
"Expected decoded value to match original double"
)
XCTAssertEqual(
container.currentIndex, 1,
"Expected index to increment after decoding double"
)
}
func testDecodeFloat() {
XCTAssertThrowsError(try container().decode(Float.self)) {
checkIsAtEnd($0, Float.self)
}
let container = container(withData: .real(2.71))
XCTAssertEqual(
container.currentIndex, 0,
"Expected index to be 0 before decoding float"
)
XCTAssertEqual(
try container.decode(Float.self), 2.71,
"Expected decoded value to match original float"
)
XCTAssertEqual(
container.currentIndex, 1,
"Expected index to increment after decoding float"
)
}
func testDecodeInt() {
XCTAssertThrowsError(try container().decode(Int.self)) {
checkIsAtEnd($0, Int.self)
}
let container = container(withData: .int(42))
XCTAssertEqual(
container.currentIndex, 0,
"Expected index to be 0 before decoding Int"
)
XCTAssertEqual(
try container.decode(Int.self), 42,
"Expected decoded value to match Int"
)
XCTAssertEqual(
container.currentIndex, 1,
"Expected index to increment after decoding Int"
)
}
func testDecodeInt8() {
XCTAssertThrowsError(try container().decode(Int8.self)) {
checkIsAtEnd($0, Int8.self)
}
let container = container(withData: .int(127))
XCTAssertEqual(
container.currentIndex, 0,
"Expected index to be 0 before decoding Int8"
)
XCTAssertEqual(
try container.decode(Int8.self), 127,
"Expected decoded value to match Int8"
)
XCTAssertEqual(
container.currentIndex, 1,
"Expected index to increment after decoding Int8"
)
}
func testDecodeInt16() {
XCTAssertThrowsError(try container().decode(Int16.self)) {
checkIsAtEnd($0, Int16.self)
}
let container = container(withData: .int(32_000))
XCTAssertEqual(
container.currentIndex, 0,
"Expected index to be 0 before decoding Int16"
)
XCTAssertEqual(
try container.decode(Int16.self), 32_000,
"Expected decoded value to match Int16"
)
XCTAssertEqual(
container.currentIndex, 1,
"Expected index to increment after decoding Int16"
)
}
func testDecodeInt32() {
XCTAssertThrowsError(try container().decode(Int32.self)) {
checkIsAtEnd($0, Int32.self)
}
let container = container(withData: .int(2_147_483_647))
XCTAssertEqual(
container.currentIndex, 0,
"Expected index to be 0 before decoding Int32"
)
XCTAssertEqual(
try container.decode(Int32.self), 2_147_483_647,
"Expected decoded value to match Int32"
)
XCTAssertEqual(
container.currentIndex, 1,
"Expected index to increment after decoding Int32"
)
}
func testDecodeInt64() {
XCTAssertThrowsError(try container().decode(Int64.self)) {
checkIsAtEnd($0, Int64.self)
}
let container = container(withData: .int(9_223_372_036_854_775_807))
XCTAssertEqual(
container.currentIndex, 0,
"Expected index to be 0 before decoding Int64"
)
XCTAssertEqual(
try container.decode(Int64.self), 9_223_372_036_854_775_807,
"Expected decoded value to match Int64"
)
XCTAssertEqual(
container.currentIndex, 1,
"Expected index to increment after decoding Int64"
)
}
func testDecodeUInt() {
XCTAssertThrowsError(try container().decode(UInt.self)) {
checkIsAtEnd($0, UInt.self)
}
let container = container(withData: .int(42))
XCTAssertEqual(
container.currentIndex, 0,
"Expected index to be 0 before decoding UInt"
)
XCTAssertEqual(
try container.decode(UInt.self), 42,
"Expected decoded value to match UInt"
)
XCTAssertEqual(
container.currentIndex, 1,
"Expected index to increment after decoding UInt"
)
}
func testDecodeUInt8() {
XCTAssertThrowsError(try container().decode(UInt8.self)) {
checkIsAtEnd($0, UInt8.self)
}
let container = container(withData: .int(255))
XCTAssertEqual(
container.currentIndex, 0,
"Expected index to be 0 before decoding UInt8"
)
XCTAssertEqual(
try container.decode(UInt8.self), 255,
"Expected decoded value to match UInt8"
)
XCTAssertEqual(
container.currentIndex, 1,
"Expected index to increment after decoding UInt8"
)
}
func testDecodeUInt16() {
XCTAssertThrowsError(try container().decode(UInt16.self)) {
checkIsAtEnd($0, UInt16.self)
}
let container = container(withData: .int(32_000))
XCTAssertEqual(
container.currentIndex, 0,
"Expected index to be 0 before decoding UInt16"
)
XCTAssertEqual(
try container.decode(UInt16.self), 32_000,
"Expected decoded value to match UInt16"
)
XCTAssertEqual(
container.currentIndex, 1,
"Expected index to increment after decoding UInt16"
)
}
func testDecodeUInt32() {
XCTAssertThrowsError(try container().decode(UInt32.self)) {
checkIsAtEnd($0, UInt32.self)
}
let container = container(withData: .int(4_294_967_295))
XCTAssertEqual(
container.currentIndex, 0,
"Expected index to be 0 before decoding UInt32"
)
XCTAssertEqual(
try container.decode(UInt32.self), 4_294_967_295,
"Expected decoded value to match UInt32"
)
XCTAssertEqual(
container.currentIndex, 1,
"Expected index to increment after decoding UInt32"
)
}
func testDecodeUInt64() {
XCTAssertThrowsError(try container().decode(UInt64.self)) {
checkIsAtEnd($0, UInt64.self)
}
let container = container(withData: .int(9_223_372_036_854_775_807))
XCTAssertEqual(
container.currentIndex, 0,
"Expected index to be 0 before decoding UInt64"
)
XCTAssertEqual(
try container.decode(UInt64.self), 9_223_372_036_854_775_807,
"Expected decoded value to match UInt64"
)
XCTAssertEqual(
container.currentIndex, 1,
"Expected index to increment after decoding UInt64"
)
}
func testDecodeDate() {
XCTAssertThrowsError(try container().decode(Date.self)) {
checkIsAtEnd($0, Date.self)
}
let date = Date(timeIntervalSince1970: 12345)
let container = container(withData: .real(date.timeIntervalSince1970))
XCTAssertEqual(
container.currentIndex, 0,
"Expected index to be 0 before decoding Date"
)
XCTAssertEqual(
try container.decode(Date.self), date,
"Expected decoded value to match Date"
)
XCTAssertEqual(
container.currentIndex, 1,
"Expected index to increment after decoding Date"
)
}
func testDecodeRawRepresentable() {
XCTAssertThrowsError(try container().decode(RawRepresentableEnum.self)) {
checkIsAtEnd($0, RawRepresentableEnum.self)
}
let `case` = RawRepresentableEnum.test
let container = container(withData: .text(`case`.rawValue))
XCTAssertEqual(
container.currentIndex, 0,
"Expected index to be 0 before decoding RawRepresentableEnum"
)
XCTAssertEqual(
try container.decode(RawRepresentableEnum.self), `case`,
"Expected decoded value to match RawRepresentableEnum"
)
XCTAssertEqual(
container.currentIndex, 1,
"Expected index to increment after decoding RawRepresentableEnum"
)
}
func testDecodeDecodable() {
XCTAssertThrowsError(try container().decode(DecodableEnum.self)) {
checkIsAtEnd($0, DecodableEnum.self)
}
let `case` = DecodableEnum.test
let container = container(withData: .text(`case`.rawValue))
XCTAssertEqual(
container.currentIndex, 0,
"Expected index to be 0 before decoding DecodableEnum"
)
XCTAssertEqual(
try container.decode(DecodableEnum.self), `case`,
"Expected decoded value to match DecodableEnum"
)
XCTAssertEqual(
container.currentIndex, 1,
"Expected index to increment after decoding DecodableEnum"
)
}
func testNestedContainerKeyedBy() {
XCTAssertThrowsError(
try container().nestedContainer(keyedBy: RowCodingKey.self)
) { error in
guard case let DecodingError.typeMismatch(type, context) = error else {
XCTFail("Expected .typeMismatch, but got: \(error).")
return
}
XCTAssertTrue(
type == KeyedDecodingContainer<RowCodingKey>.self,
"Expected KeyedDecodingContainer type."
)
XCTAssertEqual(
context.codingPath as? [RowCodingKey], [.init(intValue: 0)],
"Incorrect coding path in decoding error."
)
XCTAssertEqual(
context.debugDescription,
"""
Attempted to decode a nested keyed container,
but the value cannot be represented as a keyed container.
""",
"Unexpected debug description in decoding error."
)
}
}
func testNestedUnkeyedContainer() {
XCTAssertThrowsError(
try container().nestedUnkeyedContainer()
) { error in
guard case let DecodingError.typeMismatch(type, context) = error else {
XCTFail("Expected .typeMismatch, but got: \(error).")
return
}
XCTAssertTrue(
type == UnkeyedDecodingContainer.self,
"Expected UnkeyedDecodingContainer type."
)
XCTAssertEqual(
context.codingPath as? [RowCodingKey], [.init(intValue: 0)],
"Incorrect coding path in decoding error."
)
XCTAssertEqual(
context.debugDescription,
"""
Attempted to decode a nested unkeyed container,
but the value cannot be represented as an unkeyed container.
""",
"Unexpected debug description in decoding error."
)
}
}
func testSuperDecoder() {
XCTAssertThrowsError(
try container().superDecoder()
) { error in
guard case let DecodingError.typeMismatch(type, context) = error else {
XCTFail("Expected .typeMismatch, but got: \(error).")
return
}
XCTAssertTrue(
type == Swift.Decoder.self,
"Expected Swift.Decoder type."
)
XCTAssertEqual(
context.codingPath as? [RowCodingKey], [.init(intValue: 0)],
"Incorrect coding path in decoding error."
)
XCTAssertEqual(
context.debugDescription,
"""
Attempted to get a superDecoder,
but SQLiteRowDecoder does not support superDecoding.
""",
"Unexpected debug description in decoding error."
)
}
}
}
private extension UnkeyedContainerTests {
func container(
withData data: SQLiteRawValue,
codingPath: [any CodingKey] = []
) -> UnkeyedContainer<MockKeyedDecoder> {
var row = SQLiteRow()
row["key"] = data
return container(
withData: row,
codingPath: codingPath
)
}
func container(
withData data: SQLiteRow = .init(),
codingPath: [any CodingKey] = []
) -> UnkeyedContainer<MockKeyedDecoder> {
UnkeyedContainer(
decoder: MockKeyedDecoder(sqliteData: data),
codingPath: codingPath
)
}
func checkIsAtEnd(_ error: any Error, _ expectedType: Any.Type) {
guard case let DecodingError.valueNotFound(type, context) = error else {
XCTFail("Expected .valueNotFound, got: \(error)")
return
}
XCTAssertTrue(
type == expectedType,
"Expected type: \(expectedType), got: \(type)"
)
XCTAssertEqual(
context.codingPath as? [RowCodingKey],
[RowCodingKey(intValue: 0)],
"Invalid codingPath: \(context.codingPath)"
)
XCTAssertEqual(
context.debugDescription,
"Unkeyed container is at end.",
"Invalid debugDescription: \(context.debugDescription)"
)
}
}
private extension UnkeyedContainerTests {
enum RawRepresentableEnum: String, Decodable, SQLiteRawRepresentable {
case test
}
enum DecodableEnum: String, Decodable {
case test
}
final class MockDateDecoder: DateDecoder {
func decode(
from decoder: any ValueDecoder
) throws -> Date {
fatalError()
}
func decode(
from decoder: any RowDecoder,
for key: any CodingKey
) throws -> Date {
try decoder.decode(Date.self, for: key)
}
}
final class MockKeyedDecoder: RowDecoder {
typealias SQLiteData = SQLiteRow
let sqliteData: SQLiteData
let dateDecoder: DateDecoder
let codingPath: [any CodingKey]
let userInfo: [CodingUserInfoKey: Any]
var count: Int? {
sqliteData.isEmpty ? nil : sqliteData.count
}
init(
sqliteData: SQLiteData,
dateDecoder: DateDecoder = MockDateDecoder(),
codingPath: [any CodingKey] = [],
userInfo: [CodingUserInfoKey: Any] = [:]
) {
self.sqliteData = sqliteData
self.dateDecoder = dateDecoder
self.codingPath = codingPath
self.userInfo = userInfo
}
func contains(_ key: any CodingKey) -> Bool {
sqliteData.contains(key.stringValue)
}
func decodeNil(
for key: any CodingKey
) throws -> Bool {
sqliteData[key.intValue!].value == .null
}
func decodeDate(for key: any CodingKey) throws -> Date {
try dateDecoder.decode(from: self, for: key)
}
func decode<T: SQLiteRawRepresentable>(
_ type: T.Type,
for key: any CodingKey
) throws -> T {
type.init(sqliteData[key.intValue!].value)!
}
func decoder(for key: any CodingKey) -> any Decoder {
MockValueDecoder(sqliteData: sqliteData[key.intValue!].value)
}
func container<Key: CodingKey>(
keyedBy type: Key.Type
) throws -> KeyedDecodingContainer<Key> {
fatalError()
}
func unkeyedContainer() throws -> any UnkeyedDecodingContainer {
fatalError()
}
func singleValueContainer() throws -> any SingleValueDecodingContainer {
fatalError()
}
}
final class MockValueDecoder: ValueDecoder, SingleValueDecodingContainer {
typealias SQLiteData = SQLiteRawValue
let sqliteData: SQLiteData
var dateDecoder: DateDecoder
var codingPath: [any CodingKey]
var userInfo: [CodingUserInfoKey: Any]
init(
sqliteData: SQLiteData,
dateDecoder: DateDecoder = MockDateDecoder(),
codingPath: [any CodingKey] = [],
userInfo: [CodingUserInfoKey: Any] = [:]
) {
self.sqliteData = sqliteData
self.dateDecoder = dateDecoder
self.codingPath = codingPath
self.userInfo = userInfo
}
func decodeNil() -> Bool {
fatalError()
}
func decodeDate() throws -> Date {
fatalError()
}
func decode<T: SQLiteRawRepresentable>(
_ type: T.Type
) throws -> T {
fatalError()
}
func container<Key: CodingKey>(
keyedBy type: Key.Type
) throws -> KeyedDecodingContainer<Key> {
fatalError()
}
func unkeyedContainer() throws -> any UnkeyedDecodingContainer {
fatalError()
}
func singleValueContainer() throws -> any SingleValueDecodingContainer {
self
}
func decode(_ type: Bool.Type) throws -> Bool {
fatalError()
}
func decode(_ type: String.Type) throws -> String {
type.init(sqliteData)!
}
func decode(_ type: Double.Type) throws -> Double {
fatalError()
}
func decode(_ type: Float.Type) throws -> Float {
fatalError()
}
func decode(_ type: Int.Type) throws -> Int {
fatalError()
}
func decode(_ type: Int8.Type) throws -> Int8 {
fatalError()
}
func decode(_ type: Int16.Type) throws -> Int16 {
fatalError()
}
func decode(_ type: Int32.Type) throws -> Int32 {
fatalError()
}
func decode(_ type: Int64.Type) throws -> Int64 {
fatalError()
}
func decode(_ type: UInt.Type) throws -> UInt {
fatalError()
}
func decode(_ type: UInt8.Type) throws -> UInt8 {
fatalError()
}
func decode(_ type: UInt16.Type) throws -> UInt16 {
fatalError()
}
func decode(_ type: UInt32.Type) throws -> UInt32 {
fatalError()
}
func decode(_ type: UInt64.Type) throws -> UInt64 {
fatalError()
}
func decode<T: Decodable>(_ type: T.Type) throws -> T {
fatalError()
}
}
}