Add CustomNSError tests

Author: Anton Pogonets

TestFoundation/TestNSError.swift

@@ -16,13 +16,20 @@
     import SwiftXCTest
 #endif
 
+struct SwiftCustomNSError: Error, CustomNSError {
+}
 
 class TestNSError : XCTestCase {
 
     static var allTests: [(String, (TestNSError) -> () throws -> Void)] {
         return [
             ("test_LocalizedError_errorDescription", test_LocalizedError_errorDescription),
             ("test_NSErrorAsError_localizedDescription", test_NSErrorAsError_localizedDescription),
+            ("test_CustomNSError_domain", test_CustomNSError_domain),
+            ("test_CustomNSError_userInfo", test_CustomNSError_userInfo),
+            ("test_CustomNSError_errorCode", test_CustomNSError_errorCode),
+            ("test_CustomNSError_errorCodeRawInt", test_CustomNSError_errorCodeRawInt),
+            ("test_CustomNSError_errorCodeRawUInt", test_CustomNSError_errorCodeRawUInt),
         ]
     }
 
@@ -40,4 +47,45 @@ class TestNSError : XCTestCase {
         let error = nsError as Error
         XCTAssertEqual(error.localizedDescription, "Localized!")
     }
+
+    func test_CustomNSError_domain() {
+        XCTAssertEqual(SwiftCustomNSError.errorDomain, "TestFoundation.SwiftCustomNSError")
+    }
+
+    func test_CustomNSError_userInfo() {
+        let userInfo = SwiftCustomNSError().errorUserInfo
+            XCTAssertTrue(userInfo.isEmpty)
+    }
+
+    func test_CustomNSError_errorCode() {
+        enum SwiftError : Error, CustomNSError {
+            case zero
+            case one
+            case two
+        }
+
+        XCTAssertEqual(SwiftCustomNSError().errorCode, 1)
+
+        XCTAssertEqual(SwiftError.zero.errorCode, 0)
+        XCTAssertEqual(SwiftError.one.errorCode,  1)
+        XCTAssertEqual(SwiftError.two.errorCode,  2)
+    }
+
+    func test_CustomNSError_errorCodeRawInt() {
+        enum SwiftError : Int, Error, CustomNSError {
+            case minusOne  = -1
+            case fourtyTwo = 42
+        }
+
+        XCTAssertEqual(SwiftError.minusOne.errorCode,  -1)
+        XCTAssertEqual(SwiftError.fourtyTwo.errorCode, 42)
+    }
+
+    func test_CustomNSError_errorCodeRawUInt() {
+        enum SwiftError : UInt, Error, CustomNSError {
+            case fourtyTwo = 42
+        }
+
+        XCTAssertEqual(SwiftError.fourtyTwo.errorCode, 42)
+    }
 }