Add test coverage for EmptyObjectDecoder's keyed container

2026-03-30 11:18:38 -07:00 · 2019-08-02 09:30:30 -07:00
parent 7ec185bfe8
commit 5335f24e9b
1 changed files with 220 additions and 0 deletions
@@ -0,0 +1,220 @@
+//
+//  File.swift
+//  
+//
+//  Created by Mathew Polzin on 8/2/19.
+//
+
+import XCTest
+@testable import JSONAPI
+
+class EmptyObjectDecoderTests: XCTestCase {
+    func testEmptyStruct() {
+        XCTAssertNoThrow(try EmptyStruct.init(from: EmptyObjectDecoder()))
+        XCTAssertNoThrow(try EmptyStructWithCodingKeys.init(from: EmptyObjectDecoder()))
+    }
+
+    func testEmptyArray() {
+        XCTAssertNoThrow(try [EmptyStruct].init(from: EmptyObjectDecoder()))
+        XCTAssertNoThrow(try [String].init(from: EmptyObjectDecoder()))
+        XCTAssertNoThrow(try [Int].init(from: EmptyObjectDecoder()))
+        XCTAssertNoThrow(try [Double].init(from: EmptyObjectDecoder()))
+        XCTAssertNoThrow(try [Bool].init(from: EmptyObjectDecoder()))
+        XCTAssertNoThrow(try [Float].init(from: EmptyObjectDecoder()))
+        XCTAssertNoThrow(try [Int8].init(from: EmptyObjectDecoder()))
+        XCTAssertNoThrow(try [Int16].init(from: EmptyObjectDecoder()))
+        XCTAssertNoThrow(try [Int32].init(from: EmptyObjectDecoder()))
+        XCTAssertNoThrow(try [Int64].init(from: EmptyObjectDecoder()))
+        XCTAssertNoThrow(try [UInt].init(from: EmptyObjectDecoder()))
+        XCTAssertNoThrow(try [UInt8].init(from: EmptyObjectDecoder()))
+        XCTAssertNoThrow(try [UInt16].init(from: EmptyObjectDecoder()))
+        XCTAssertNoThrow(try [UInt32].init(from: EmptyObjectDecoder()))
+        XCTAssertNoThrow(try [UInt64].init(from: EmptyObjectDecoder()))
+    }
+
+    func testNonEmptyStruct() {
+        XCTAssertThrowsError(try NonEmptyStruct<EmptyStruct>.init(from: EmptyObjectDecoder()))
+        XCTAssertThrowsError(try NonEmptyStructString.init(from: EmptyObjectDecoder()))
+        XCTAssertThrowsError(try NonEmptyStructInt.init(from: EmptyObjectDecoder()))
+        XCTAssertThrowsError(try NonEmptyStructDouble.init(from: EmptyObjectDecoder()))
+        XCTAssertThrowsError(try NonEmptyStructBool.init(from: EmptyObjectDecoder()))
+        XCTAssertThrowsError(try NonEmptyStructFloat.init(from: EmptyObjectDecoder()))
+        XCTAssertThrowsError(try NonEmptyStructInt8.init(from: EmptyObjectDecoder()))
+        XCTAssertThrowsError(try NonEmptyStructInt16.init(from: EmptyObjectDecoder()))
+        XCTAssertThrowsError(try NonEmptyStructInt32.init(from: EmptyObjectDecoder()))
+        XCTAssertThrowsError(try NonEmptyStructInt64.init(from: EmptyObjectDecoder()))
+        XCTAssertThrowsError(try NonEmptyStructUInt.init(from: EmptyObjectDecoder()))
+        XCTAssertThrowsError(try NonEmptyStructUInt8.init(from: EmptyObjectDecoder()))
+        XCTAssertThrowsError(try NonEmptyStructUInt16.init(from: EmptyObjectDecoder()))
+        XCTAssertThrowsError(try NonEmptyStructUInt32.init(from: EmptyObjectDecoder()))
+        XCTAssertThrowsError(try NonEmptyStructUInt64.init(from: EmptyObjectDecoder()))
+    }
+
+    func testWantingNil() {
+        XCTAssertThrowsError(try StructWithNil.init(from: EmptyObjectDecoder()))
+    }
+
+    func testWantingSingleValue() {
+        XCTAssertThrowsError(try StructWithSingleValue.init(from: EmptyObjectDecoder()))
+    }
+
+    func testWantingNestedKeyed() {
+        XCTAssertThrowsError(try StructWithNestedKeyedCall.init(from: EmptyObjectDecoder()))
+    }
+
+    func testWantingNestedUnkeyed() {
+        XCTAssertThrowsError(try StructWithNestedUnkeyedCall.init(from: EmptyObjectDecoder()))
+    }
+
+    func testWantsSuper() {
+        XCTAssertThrowsError(try StructWithUnkeyedSuper.init(from: EmptyObjectDecoder()))
+
+        XCTAssertThrowsError(try StructWithKeyedSuper.init(from: EmptyObjectDecoder()))
+    }
+
+    func testKeysAndCodingPath() {
+        XCTAssertEqual(try? EmptyObjectDecoder().container(keyedBy: EmptyStructWithCodingKeys.CodingKeys.self).allKeys.count, 0)
+        XCTAssertEqual(try? EmptyObjectDecoder().container(keyedBy: EmptyStructWithCodingKeys.CodingKeys.self).codingPath.count, 0)
+    }
+}
+
+struct EmptyStruct: Decodable {
+
+}
+
+struct EmptyStructWithCodingKeys: Decodable {
+    enum CodingKeys: String, CodingKey {
+        case hello
+    }
+
+    init(from decoder: Decoder) throws {}
+}
+
+struct NonEmptyStruct<T: Decodable>: Decodable {
+    let value: T
+}
+
+struct NonEmptyStructString: Decodable {
+    let value: String
+}
+
+struct NonEmptyStructInt: Decodable {
+    let value: Int
+}
+
+struct NonEmptyStructDouble: Decodable {
+    let value: Double
+}
+
+struct NonEmptyStructBool: Decodable {
+    let value: Bool
+}
+
+struct NonEmptyStructFloat: Decodable {
+    let value: Float
+}
+
+struct NonEmptyStructInt8: Decodable {
+    let value: Int8
+}
+
+struct NonEmptyStructInt16: Decodable {
+    let value: Int16
+}
+
+struct NonEmptyStructInt32: Decodable {
+    let value: Int32
+}
+
+struct NonEmptyStructInt64: Decodable {
+    let value: Int64
+}
+
+struct NonEmptyStructUInt: Decodable {
+    let value: UInt
+}
+
+struct NonEmptyStructUInt8: Decodable {
+    let value: UInt8
+}
+
+struct NonEmptyStructUInt16: Decodable {
+    let value: UInt16
+}
+
+struct NonEmptyStructUInt32: Decodable {
+    let value: UInt32
+}
+
+struct NonEmptyStructUInt64: Decodable {
+    let value: UInt64
+}
+
+struct StructWithNil: Decodable {
+    enum CodingKeys: String, CodingKey {
+        case hello
+    }
+
+    init(from decoder: Decoder) throws {
+        let container = try decoder.container(keyedBy: CodingKeys.self)
+
+        let _ = try container.decodeNil(forKey: .hello)
+    }
+}
+
+struct StructWithSingleValue: Decodable {
+    let value: String
+
+    init(from decoder: Decoder) throws {
+        let container = try decoder.singleValueContainer()
+        value = try container.decode(String.self)
+    }
+}
+
+struct StructWithNestedKeyedCall: Decodable {
+    enum CodingKeys: String, CodingKey {
+        case hello
+    }
+
+    enum NestedKeys: String, CodingKey {
+        case world
+    }
+
+    init(from decoder: Decoder) throws {
+        let container = try decoder.container(keyedBy: CodingKeys.self)
+
+        let _ = try container.nestedContainer(keyedBy: NestedKeys.self, forKey: .hello)
+    }
+}
+
+struct StructWithNestedUnkeyedCall: Decodable {
+    enum CodingKeys: String, CodingKey {
+        case hello
+    }
+
+    init(from decoder: Decoder) throws {
+        let container = try decoder.container(keyedBy: CodingKeys.self)
+
+        let _ = try container.nestedUnkeyedContainer(forKey: .hello)
+    }
+}
+
+struct StructWithUnkeyedSuper: Decodable {
+    enum CodingKeys: String, CodingKey {
+        case hello
+    }
+
+    init(from decoder: Decoder) throws {
+        let _ = try decoder.container(keyedBy: CodingKeys.self).superDecoder()
+    }
+}
+
+struct StructWithKeyedSuper: Decodable {
+    enum CodingKeys: String, CodingKey {
+        case hello
+    }
+
+    init(from decoder: Decoder) throws {
+        let _ = try decoder.container(keyedBy: CodingKeys.self).superDecoder(forKey: .hello)
+    }
+}