Complete test coverage of APIDescription

Tests/JSONAPITests/APIDescription/APIDescriptionTests.swift

@@ -10,6 +10,17 @@ import JSONAPI
 
 class APIDescriptionTests: XCTestCase {
 
+    func test_init() {
+        let _ = APIDescription<NoMetadata>(version: "hello",
+                                                      meta: .none)
+        let _ = APIDescription<TestMetadata>(version: "world",
+                                                        meta: .init(hello: "there",
+                                                                    number: 2))
+        let _ = NoAPIDescription()
+
+        XCTAssertEqual(NoAPIDescription(), NoAPIDescription.none)
+    }
+
 	func test_NoDescriptionString() {
 		XCTAssertEqual(String(describing: NoAPIDescription()), "No JSON:API Object")
 	}
@@ -18,12 +29,18 @@ class APIDescriptionTests: XCTestCase {
 		let description = decoded(type: APIDescription<NoMetadata>.self, data: api_description_empty)
 
 		XCTAssertEqual(description.version, "1.0")
+
+        test_DecodeEncodeEquality(type: APIDescription<NoMetadata>.self,
+                                  data: api_description_empty)
 	}
 
 	func test_WithVersion() {
 		let description = decoded(type: APIDescription<NoMetadata>.self, data: api_description_with_version)
 
 		XCTAssertEqual(description.version, "1.5")
+
+        test_DecodeEncodeEquality(type: APIDescription<NoMetadata>.self,
+                                  data: api_description_with_version)
 	}
 
 	func test_WithMeta() {
@@ -32,6 +49,9 @@ class APIDescriptionTests: XCTestCase {
 		XCTAssertEqual(description.version, "1.0")
 		XCTAssertEqual(description.meta.hello, "world")
 		XCTAssertEqual(description.meta.number, 10)
+
+        test_DecodeEncodeEquality(type: APIDescription<TestMetadata>.self,
+                                  data: api_description_with_meta)
 	}
 
 	func test_WithVersionAndMeta() {
@@ -40,6 +60,9 @@ class APIDescriptionTests: XCTestCase {
 		XCTAssertEqual(description.version, "2.0")
 		XCTAssertEqual(description.meta.hello, "world")
 		XCTAssertEqual(description.meta.number, 10)
+
+        test_DecodeEncodeEquality(type: APIDescription<TestMetadata>.self,
+                                  data: api_description_with_version_and_meta)
 	}
 
 	func test_failsMissingMeta() {