objectivec/Tests/GPBSwiftTests.swift - third_party/protobuf - Git at Google

 // Protocol Buffers - Google's data interchange format
 // Copyright 2015 Google Inc.  All rights reserved.
 // https://developers.google.com/protocol-buffers/
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 // notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 // copyright notice, this list of conditions and the following disclaimer
 // in the documentation and/or other materials provided with the
 // distribution.
 //     * Neither the name of Google Inc. nor the names of its
 // contributors may be used to endorse or promote products derived from
 // this software without specific prior written permission.
 //
 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 import Foundation
 import XCTest

 // Test some usage of the ObjC library from Swift.

 class GPBBridgeTests: XCTestCase {

   func testProto2Basics() {
     let msg = Message2()
     let msg2 = Message2()
     let msg3 = Message2_OptionalGroup()

     msg.optionalInt32 = 100
     msg.optionalString = "abc"
     msg.optionalEnum = .bar
     msg2.optionalString = "other"
     msg.optional = msg2
     msg3.a = 200
     msg.optionalGroup = msg3
     msg.repeatedInt32Array.addValue(300)
     msg.repeatedInt32Array.addValue(301)
     msg.repeatedStringArray.add("mno")
     msg.repeatedStringArray.add("pqr")
     msg.repeatedEnumArray.addValue(Message2_Enum.bar.rawValue)
     msg.repeatedEnumArray.addValue(Message2_Enum.baz.rawValue)
     msg.mapInt32Int32.setInt32(400, forKey:500)
     msg.mapInt32Int32.setInt32(401, forKey:501)
     msg.mapStringString.setObject("foo", forKey:"bar" as NSString)
     msg.mapStringString.setObject("abc", forKey:"xyz" as NSString)
     msg.mapInt32Enum.setEnum(Message2_Enum.bar.rawValue, forKey:600)
     msg.mapInt32Enum.setEnum(Message2_Enum.baz.rawValue, forKey:601)

     // Check has*.
     XCTAssertTrue(msg.hasOptionalInt32)
     XCTAssertTrue(msg.hasOptionalString)
     XCTAssertTrue(msg.hasOptionalEnum)
     XCTAssertTrue(msg2.hasOptionalString)
     XCTAssertTrue(msg.hasOptionalMessage)
     XCTAssertTrue(msg3.hasA)
     XCTAssertTrue(msg.hasOptionalGroup)
     XCTAssertFalse(msg.hasOptionalInt64)
     XCTAssertFalse(msg.hasOptionalFloat)

     // Check values.
     XCTAssertEqual(msg.optionalInt32, Int32(100))
     XCTAssertEqual(msg.optionalString, "abc")
     XCTAssertEqual(msg2.optionalString, "other")
     XCTAssertTrue(msg.optional === msg2)
     XCTAssertEqual(msg.optionalEnum, Message2_Enum.bar)
     XCTAssertEqual(msg3.a, Int32(200))
     XCTAssertTrue(msg.optionalGroup === msg3)
     XCTAssertEqual(msg.repeatedInt32Array.count, UInt(2))
     XCTAssertEqual(msg.repeatedInt32Array.value(at: 0), Int32(300))
     XCTAssertEqual(msg.repeatedInt32Array.value(at: 1), Int32(301))
     XCTAssertEqual(msg.repeatedStringArray.count, Int(2))
     XCTAssertEqual(msg.repeatedStringArray.object(at: 0) as? String, "mno")
     XCTAssertEqual(msg.repeatedStringArray.object(at: 1) as? String, "pqr")
     XCTAssertEqual(msg.repeatedEnumArray.count, UInt(2))
     XCTAssertEqual(msg.repeatedEnumArray.value(at: 0), Message2_Enum.bar.rawValue)
     XCTAssertEqual(msg.repeatedEnumArray.value(at: 1), Message2_Enum.baz.rawValue)
     XCTAssertEqual(msg.repeatedInt64Array.count, UInt(0))
     XCTAssertEqual(msg.mapInt32Int32.count, UInt(2))
     var intValue: Int32 = 0
     XCTAssertTrue(msg.mapInt32Int32.getInt32(&intValue, forKey: 500))
     XCTAssertEqual(intValue, Int32(400))
     XCTAssertTrue(msg.mapInt32Int32.getInt32(&intValue, forKey: 501))
     XCTAssertEqual(intValue, Int32(401))
     XCTAssertEqual(msg.mapStringString.count, Int(2))
     XCTAssertEqual(msg.mapStringString.object(forKey: "bar") as? String, "foo")
     XCTAssertEqual(msg.mapStringString.object(forKey: "xyz") as? String, "abc")
     XCTAssertEqual(msg.mapInt32Enum.count, UInt(2))
     XCTAssertTrue(msg.mapInt32Enum.getEnum(&intValue, forKey:600))
     XCTAssertEqual(intValue, Message2_Enum.bar.rawValue)
     XCTAssertTrue(msg.mapInt32Enum.getEnum(&intValue, forKey:601))
     XCTAssertEqual(intValue, Message2_Enum.baz.rawValue)

     // Clearing a string with nil.
     msg2.optionalString = nil
     XCTAssertFalse(msg2.hasOptionalString)
     XCTAssertEqual(msg2.optionalString, "")

     // Clearing a message with nil.
     msg.optionalGroup = nil
     XCTAssertFalse(msg.hasOptionalGroup)
     XCTAssertTrue(msg.optionalGroup !== msg3)  // New instance

     // Clear.
     msg.clear()
     XCTAssertFalse(msg.hasOptionalInt32)
     XCTAssertFalse(msg.hasOptionalString)
     XCTAssertFalse(msg.hasOptionalEnum)
     XCTAssertFalse(msg.hasOptionalMessage)
     XCTAssertFalse(msg.hasOptionalInt64)
     XCTAssertFalse(msg.hasOptionalFloat)
     XCTAssertEqual(msg.optionalInt32, Int32(0))
     XCTAssertEqual(msg.optionalString, "")
     XCTAssertTrue(msg.optional !== msg2)  // New instance
     XCTAssertEqual(msg.optionalEnum, Message2_Enum.foo)  // Default
     XCTAssertEqual(msg.repeatedInt32Array.count, UInt(0))
     XCTAssertEqual(msg.repeatedStringArray.count, Int(0))
     XCTAssertEqual(msg.repeatedEnumArray.count, UInt(0))
     XCTAssertEqual(msg.mapInt32Int32.count, UInt(0))
     XCTAssertEqual(msg.mapStringString.count, Int(0))
     XCTAssertEqual(msg.mapInt32Enum.count, UInt(0))
   }

   func testProto3Basics() {
     let msg = Message3()
     let msg2 = Message3()

     msg.optionalInt32 = 100
     msg.optionalString = "abc"
     msg.optionalEnum = .bar
     msg2.optionalString = "other"
     msg.optional = msg2
     msg.repeatedInt32Array.addValue(300)
     msg.repeatedInt32Array.addValue(301)
     msg.repeatedStringArray.add("mno")
     msg.repeatedStringArray.add("pqr")
     // "proto3" syntax lets enum get unknown values.
     msg.repeatedEnumArray.addValue(Message3_Enum.bar.rawValue)
     msg.repeatedEnumArray.addRawValue(666)
     SetMessage3_OptionalEnum_RawValue(msg2, 666)
     msg.mapInt32Int32.setInt32(400, forKey:500)
     msg.mapInt32Int32.setInt32(401, forKey:501)
     msg.mapStringString.setObject("foo", forKey:"bar" as NSString)
     msg.mapStringString.setObject("abc", forKey:"xyz" as NSString)
     msg.mapInt32Enum.setEnum(Message2_Enum.bar.rawValue, forKey:600)
     // "proto3" syntax lets enum get unknown values.
     msg.mapInt32Enum.setRawValue(666, forKey:601)

     // Has only exists on for message fields.
     XCTAssertTrue(msg.hasOptionalMessage)
     XCTAssertFalse(msg2.hasOptionalMessage)

     // Check values.
     XCTAssertEqual(msg.optionalInt32, Int32(100))
     XCTAssertEqual(msg.optionalString, "abc")
     XCTAssertEqual(msg2.optionalString, "other")
     XCTAssertTrue(msg.optional === msg2)
     XCTAssertEqual(msg.optionalEnum, Message3_Enum.bar)
     XCTAssertEqual(msg.repeatedInt32Array.count, UInt(2))
     XCTAssertEqual(msg.repeatedInt32Array.value(at: 0), Int32(300))
     XCTAssertEqual(msg.repeatedInt32Array.value(at: 1), Int32(301))
     XCTAssertEqual(msg.repeatedStringArray.count, Int(2))
     XCTAssertEqual(msg.repeatedStringArray.object(at: 0) as? String, "mno")
     XCTAssertEqual(msg.repeatedStringArray.object(at: 1) as? String, "pqr")
     XCTAssertEqual(msg.repeatedInt64Array.count, UInt(0))
     XCTAssertEqual(msg.repeatedEnumArray.count, UInt(2))
     XCTAssertEqual(msg.repeatedEnumArray.value(at: 0), Message3_Enum.bar.rawValue)
     XCTAssertEqual(msg.repeatedEnumArray.value(at: 1), Message3_Enum.gpbUnrecognizedEnumeratorValue.rawValue)
     XCTAssertEqual(msg.repeatedEnumArray.rawValue(at: 1), 666)
     XCTAssertEqual(msg2.optionalEnum, Message3_Enum.gpbUnrecognizedEnumeratorValue)
     XCTAssertEqual(Message3_OptionalEnum_RawValue(msg2), Int32(666))
     XCTAssertEqual(msg.mapInt32Int32.count, UInt(2))
     var intValue: Int32 = 0
     XCTAssertTrue(msg.mapInt32Int32.getInt32(&intValue, forKey:500))
     XCTAssertEqual(intValue, Int32(400))
     XCTAssertTrue(msg.mapInt32Int32.getInt32(&intValue, forKey:501))
     XCTAssertEqual(intValue, Int32(401))
     XCTAssertEqual(msg.mapStringString.count, Int(2))
     XCTAssertEqual(msg.mapStringString.object(forKey: "bar") as? String, "foo")
     XCTAssertEqual(msg.mapStringString.object(forKey: "xyz") as? String, "abc")
     XCTAssertEqual(msg.mapInt32Enum.count, UInt(2))
     XCTAssertTrue(msg.mapInt32Enum.getEnum(&intValue, forKey:600))
     XCTAssertEqual(intValue, Message2_Enum.bar.rawValue)
     XCTAssertTrue(msg.mapInt32Enum.getEnum(&intValue, forKey:601))
     XCTAssertEqual(intValue, Message3_Enum.gpbUnrecognizedEnumeratorValue.rawValue)
     XCTAssertTrue(msg.mapInt32Enum.getRawValue(&intValue, forKey:601))
     XCTAssertEqual(intValue, 666)

     // Clearing a string with nil.
     msg2.optionalString = nil
     XCTAssertEqual(msg2.optionalString, "")

     // Clearing a message with nil.
     msg.optional = nil
     XCTAssertFalse(msg.hasOptionalMessage)
     XCTAssertTrue(msg.optional !== msg2)  // New instance

     // Clear.
     msg.clear()
     XCTAssertFalse(msg.hasOptionalMessage)
     XCTAssertEqual(msg.optionalInt32, Int32(0))
     XCTAssertEqual(msg.optionalString, "")
     XCTAssertTrue(msg.optional !== msg2)  // New instance
     XCTAssertEqual(msg.optionalEnum, Message3_Enum.foo)  // Default
     XCTAssertEqual(msg.repeatedInt32Array.count, UInt(0))
     XCTAssertEqual(msg.repeatedStringArray.count, Int(0))
     XCTAssertEqual(msg.repeatedEnumArray.count, UInt(0))
     msg2.clear()
     XCTAssertEqual(msg2.optionalEnum, Message3_Enum.foo)  // Default
     XCTAssertEqual(Message3_OptionalEnum_RawValue(msg2), Message3_Enum.foo.rawValue)
     XCTAssertEqual(msg.mapInt32Int32.count, UInt(0))
     XCTAssertEqual(msg.mapStringString.count, Int(0))
     XCTAssertEqual(msg.mapInt32Enum.count, UInt(0))
   }

   func testAutoCreation() {
     let msg = Message2()

     XCTAssertFalse(msg.hasOptionalGroup)
     XCTAssertFalse(msg.hasOptionalMessage)

     // Access shouldn't result in has* but should return objects.
     let msg2 = msg.optionalGroup
     let msg3 = msg.optional.optional
     let msg4 = msg.optional
     XCTAssertNotNil(msg2)
     XCTAssertNotNil(msg3)
     XCTAssertFalse(msg.hasOptionalGroup)
     XCTAssertFalse(msg.optional.hasOptionalMessage)
     XCTAssertFalse(msg.hasOptionalMessage)

     // Setting things should trigger has* getting set.
     msg.optionalGroup.a = 10
     msg.optional.optional.optionalInt32 = 100
     XCTAssertTrue(msg.hasOptionalGroup)
     XCTAssertTrue(msg.optional.hasOptionalMessage)
     XCTAssertTrue(msg.hasOptionalMessage)

     // And they should be the same pointer as before.
     XCTAssertTrue(msg2 === msg.optionalGroup)
     XCTAssertTrue(msg3 === msg.optional.optional)
     XCTAssertTrue(msg4 === msg.optional)

     // Clear gets us new objects next time around.
     msg.clear()
     XCTAssertFalse(msg.hasOptionalGroup)
     XCTAssertFalse(msg.optional.hasOptionalMessage)
     XCTAssertFalse(msg.hasOptionalMessage)
     msg.optionalGroup.a = 20
     msg.optional.optional.optionalInt32 = 200
     XCTAssertTrue(msg.hasOptionalGroup)
     XCTAssertTrue(msg.optional.hasOptionalMessage)
     XCTAssertTrue(msg.hasOptionalMessage)
     XCTAssertTrue(msg2 !== msg.optionalGroup)
     XCTAssertTrue(msg3 !== msg.optional.optional)
     XCTAssertTrue(msg4 !== msg.optional)

     // Explicit set of a message, means autocreated object doesn't bind.
     msg.clear()
     let autoCreated = msg.optional
     XCTAssertFalse(msg.hasOptionalMessage)
     let msg5 = Message2()
     msg5.optionalInt32 = 123
     msg.optional = msg5
     XCTAssertTrue(msg.hasOptionalMessage)
     // Modifying the autocreated doesn't replaced the explicit set one.
     autoCreated?.optionalInt32 = 456
     XCTAssertTrue(msg.hasOptionalMessage)
     XCTAssertTrue(msg.optional === msg5)
     XCTAssertEqual(msg.optional.optionalInt32, Int32(123))
   }

   func testProto2OneOfSupport() {
     let msg = Message2()

     XCTAssertEqual(msg.oOneOfCase, Message2_O_OneOfCase.gpbUnsetOneOfCase)
     XCTAssertEqual(msg.oneofInt32, Int32(100))  // Default
     XCTAssertEqual(msg.oneofFloat, Float(110.0))  // Default
     XCTAssertEqual(msg.oneofEnum, Message2_Enum.baz)  // Default
     let autoCreated = msg.oneof  // Default create one.
     XCTAssertNotNil(autoCreated)
     XCTAssertEqual(msg.oOneOfCase, Message2_O_OneOfCase.gpbUnsetOneOfCase)

     msg.oneofInt32 = 10
     XCTAssertEqual(msg.oneofInt32, Int32(10))
     XCTAssertEqual(msg.oneofFloat, Float(110.0))  // Default
     XCTAssertEqual(msg.oneofEnum, Message2_Enum.baz)  // Default
     XCTAssertTrue(msg.oneof === autoCreated)  // Still the same
     XCTAssertEqual(msg.oOneOfCase, Message2_O_OneOfCase.oneofInt32)

     msg.oneofFloat = 20.0
     XCTAssertEqual(msg.oneofInt32, Int32(100))  // Default
     XCTAssertEqual(msg.oneofFloat, Float(20.0))
     XCTAssertEqual(msg.oneofEnum, Message2_Enum.baz)  // Default
     XCTAssertTrue(msg.oneof === autoCreated)  // Still the same
     XCTAssertEqual(msg.oOneOfCase, Message2_O_OneOfCase.oneofFloat)

     msg.oneofEnum = .bar
     XCTAssertEqual(msg.oneofInt32, Int32(100))  // Default
     XCTAssertEqual(msg.oneofFloat, Float(110.0))  // Default
     XCTAssertEqual(msg.oneofEnum, Message2_Enum.bar)
     XCTAssertTrue(msg.oneof === autoCreated)  // Still the same
     XCTAssertEqual(msg.oOneOfCase, Message2_O_OneOfCase.oneofEnum)

     // Sets via the autocreated instance.
     msg.oneof.optionalInt32 = 200
     XCTAssertEqual(msg.oneofInt32, Int32(100))  // Default
     XCTAssertEqual(msg.oneofFloat, Float(110.0))  // Default
     XCTAssertEqual(msg.oneofEnum, Message2_Enum.baz)  // Default
     XCTAssertTrue(msg.oneof === autoCreated)  // Still the same
     XCTAssertEqual(msg.oneof.optionalInt32, Int32(200))
     XCTAssertEqual(msg.oOneOfCase, Message2_O_OneOfCase.oneofMessage)

     // Clear the oneof.
     Message2_ClearOOneOfCase(msg)
     XCTAssertEqual(msg.oneofInt32, Int32(100))  // Default
     XCTAssertEqual(msg.oneofFloat, Float(110.0))  // Default
     XCTAssertEqual(msg.oneofEnum, Message2_Enum.baz)  // Default
     let autoCreated2 = msg.oneof  // Default create one
     XCTAssertNotNil(autoCreated2)
     XCTAssertTrue(autoCreated2 !== autoCreated)  // New instance
     XCTAssertEqual(msg.oneof.optionalInt32, Int32(0))  // Default
     XCTAssertEqual(msg.oOneOfCase, Message2_O_OneOfCase.gpbUnsetOneOfCase)

     msg.oneofInt32 = 10
     XCTAssertEqual(msg.oneofInt32, Int32(10))
     XCTAssertEqual(msg.oOneOfCase, Message2_O_OneOfCase.oneofInt32)

     // Confirm Message.clear() handles the oneof correctly.
     msg.clear()
     XCTAssertEqual(msg.oneofInt32, Int32(100))  // Default
     XCTAssertEqual(msg.oOneOfCase, Message2_O_OneOfCase.gpbUnsetOneOfCase)

     // Sets via the autocreated instance.
     msg.oneof.optionalInt32 = 300
     XCTAssertTrue(msg.oneof !== autoCreated)  // New instance
     XCTAssertTrue(msg.oneof !== autoCreated2)  // New instance
     XCTAssertEqual(msg.oneof.optionalInt32, Int32(300))
     XCTAssertEqual(msg.oOneOfCase, Message2_O_OneOfCase.oneofMessage)

     // Set message to nil clears the oneof.
     msg.oneof = nil
     XCTAssertEqual(msg.oneof.optionalInt32, Int32(0))  // Default
     XCTAssertEqual(msg.oOneOfCase, Message2_O_OneOfCase.gpbUnsetOneOfCase)
   }

   func testProto3OneOfSupport() {
     let msg = Message3()

     XCTAssertEqual(msg.oOneOfCase, Message3_O_OneOfCase.gpbUnsetOneOfCase)
     XCTAssertEqual(msg.oneofInt32, Int32(0))  // Default
     XCTAssertEqual(msg.oneofFloat, Float(0.0))  // Default
     XCTAssertEqual(msg.oneofEnum, Message3_Enum.foo)  // Default
     let autoCreated = msg.oneof  // Default create one.
     XCTAssertNotNil(autoCreated)
     XCTAssertEqual(msg.oOneOfCase, Message3_O_OneOfCase.gpbUnsetOneOfCase)

     msg.oneofInt32 = 10
     XCTAssertEqual(msg.oneofInt32, Int32(10))
     XCTAssertEqual(msg.oneofFloat, Float(0.0))  // Default
     XCTAssertEqual(msg.oneofEnum, Message3_Enum.foo)  // Default
     XCTAssertTrue(msg.oneof === autoCreated)  // Still the same
     XCTAssertEqual(msg.oOneOfCase, Message3_O_OneOfCase.oneofInt32)

     msg.oneofFloat = 20.0
     XCTAssertEqual(msg.oneofInt32, Int32(0))  // Default
     XCTAssertEqual(msg.oneofFloat, Float(20.0))
     XCTAssertEqual(msg.oneofEnum, Message3_Enum.foo)  // Default
     XCTAssertTrue(msg.oneof === autoCreated)  // Still the same
     XCTAssertEqual(msg.oOneOfCase, Message3_O_OneOfCase.oneofFloat)

     msg.oneofEnum = .bar
     XCTAssertEqual(msg.oneofInt32, Int32(0))  // Default
     XCTAssertEqual(msg.oneofFloat, Float(0.0))  // Default
     XCTAssertEqual(msg.oneofEnum, Message3_Enum.bar)
     XCTAssertTrue(msg.oneof === autoCreated)  // Still the same
     XCTAssertEqual(msg.oOneOfCase, Message3_O_OneOfCase.oneofEnum)

     // Sets via the autocreated instance.
     msg.oneof.optionalInt32 = 200
     XCTAssertEqual(msg.oneofInt32, Int32(0))  // Default
     XCTAssertEqual(msg.oneofFloat, Float(0.0))  // Default
     XCTAssertEqual(msg.oneofEnum, Message3_Enum.foo)  // Default
     XCTAssertTrue(msg.oneof === autoCreated)  // Still the same
     XCTAssertEqual(msg.oneof.optionalInt32, Int32(200))
     XCTAssertEqual(msg.oOneOfCase, Message3_O_OneOfCase.oneofMessage)

     // Clear the oneof.
     Message3_ClearOOneOfCase(msg)
     XCTAssertEqual(msg.oneofInt32, Int32(0))  // Default
     XCTAssertEqual(msg.oneofFloat, Float(0.0))  // Default
     XCTAssertEqual(msg.oneofEnum, Message3_Enum.foo)  // Default
     let autoCreated2 = msg.oneof  // Default create one
     XCTAssertNotNil(autoCreated2)
     XCTAssertTrue(autoCreated2 !== autoCreated)  // New instance
     XCTAssertEqual(msg.oneof.optionalInt32, Int32(0))  // Default
     XCTAssertEqual(msg.oOneOfCase, Message3_O_OneOfCase.gpbUnsetOneOfCase)

     msg.oneofInt32 = 10
     XCTAssertEqual(msg.oneofInt32, Int32(10))
     XCTAssertEqual(msg.oOneOfCase, Message3_O_OneOfCase.oneofInt32)

     // Confirm Message.clear() handles the oneof correctly.
     msg.clear()
     XCTAssertEqual(msg.oneofInt32, Int32(0))  // Default
     XCTAssertEqual(msg.oOneOfCase, Message3_O_OneOfCase.gpbUnsetOneOfCase)

     // Sets via the autocreated instance.
     msg.oneof.optionalInt32 = 300
     XCTAssertTrue(msg.oneof !== autoCreated)  // New instance
     XCTAssertTrue(msg.oneof !== autoCreated2)  // New instance
     XCTAssertEqual(msg.oneof.optionalInt32, Int32(300))
     XCTAssertEqual(msg.oOneOfCase, Message3_O_OneOfCase.oneofMessage)

     // Set message to nil clears the oneof.
     msg.oneof = nil
     XCTAssertEqual(msg.oneof.optionalInt32, Int32(0))  // Default
     XCTAssertEqual(msg.oOneOfCase, Message3_O_OneOfCase.gpbUnsetOneOfCase)
   }

   func testSerialization() {
     let msg = Message2()

     msg.optionalInt32 = 100
     msg.optionalInt64 = 101
     msg.optionalGroup.a = 102
     msg.repeatedStringArray.add("abc")
     msg.repeatedStringArray.add("def")
     msg.mapInt32Int32.setInt32(200, forKey:300)
     msg.mapInt32Int32.setInt32(201, forKey:201)
     msg.mapStringString.setObject("foo", forKey:"bar" as NSString)
     msg.mapStringString.setObject("abc", forKey:"xyz" as NSString)

     let data = msg.data()

     let msg2 = try! Message2(data: data!)
     XCTAssertTrue(msg2 !== msg)  // New instance
     XCTAssertEqual(msg.optionalInt32, Int32(100))
     XCTAssertEqual(msg.optionalInt64, Int64(101))
     XCTAssertEqual(msg.optionalGroup.a, Int32(102))
     XCTAssertEqual(msg.repeatedStringArray.count, Int(2))
     XCTAssertEqual(msg.mapInt32Int32.count, UInt(2))
     XCTAssertEqual(msg.mapStringString.count, Int(2))
     XCTAssertEqual(msg2, msg)
   }

 }
	// Protocol Buffers - Google's data interchange format
	// Copyright 2015 Google Inc. All rights reserved.
	// https://developers.google.com/protocol-buffers/
	//
	// Redistribution and use in source and binary forms, with or without
	// modification, are permitted provided that the following conditions are
	// met:
	//
	// * Redistributions of source code must retain the above copyright
	// notice, this list of conditions and the following disclaimer.
	// * Redistributions in binary form must reproduce the above
	// copyright notice, this list of conditions and the following disclaimer
	// in the documentation and/or other materials provided with the
	// distribution.
	// * Neither the name of Google Inc. nor the names of its
	// contributors may be used to endorse or promote products derived from
	// this software without specific prior written permission.
	//
	// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
	// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
	// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
	// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
	// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
	// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
	// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
	// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
	// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
	// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

	import Foundation
	import XCTest

	// Test some usage of the ObjC library from Swift.

	class GPBBridgeTests: XCTestCase {

	func testProto2Basics() {
	let msg = Message2()
	let msg2 = Message2()
	let msg3 = Message2_OptionalGroup()

	msg.optionalInt32 = 100
	msg.optionalString = "abc"
	msg.optionalEnum = .bar
	msg2.optionalString = "other"
	msg.optional = msg2
	msg3.a = 200
	msg.optionalGroup = msg3
	msg.repeatedInt32Array.addValue(300)
	msg.repeatedInt32Array.addValue(301)
	msg.repeatedStringArray.add("mno")
	msg.repeatedStringArray.add("pqr")
	msg.repeatedEnumArray.addValue(Message2_Enum.bar.rawValue)
	msg.repeatedEnumArray.addValue(Message2_Enum.baz.rawValue)
	msg.mapInt32Int32.setInt32(400, forKey:500)
	msg.mapInt32Int32.setInt32(401, forKey:501)
	msg.mapStringString.setObject("foo", forKey:"bar" as NSString)
	msg.mapStringString.setObject("abc", forKey:"xyz" as NSString)
	msg.mapInt32Enum.setEnum(Message2_Enum.bar.rawValue, forKey:600)
	msg.mapInt32Enum.setEnum(Message2_Enum.baz.rawValue, forKey:601)

	// Check has*.
	XCTAssertTrue(msg.hasOptionalInt32)
	XCTAssertTrue(msg.hasOptionalString)
	XCTAssertTrue(msg.hasOptionalEnum)
	XCTAssertTrue(msg2.hasOptionalString)
	XCTAssertTrue(msg.hasOptionalMessage)
	XCTAssertTrue(msg3.hasA)
	XCTAssertTrue(msg.hasOptionalGroup)
	XCTAssertFalse(msg.hasOptionalInt64)
	XCTAssertFalse(msg.hasOptionalFloat)

	// Check values.
	XCTAssertEqual(msg.optionalInt32, Int32(100))
	XCTAssertEqual(msg.optionalString, "abc")
	XCTAssertEqual(msg2.optionalString, "other")
	XCTAssertTrue(msg.optional === msg2)
	XCTAssertEqual(msg.optionalEnum, Message2_Enum.bar)
	XCTAssertEqual(msg3.a, Int32(200))
	XCTAssertTrue(msg.optionalGroup === msg3)
	XCTAssertEqual(msg.repeatedInt32Array.count, UInt(2))
	XCTAssertEqual(msg.repeatedInt32Array.value(at: 0), Int32(300))
	XCTAssertEqual(msg.repeatedInt32Array.value(at: 1), Int32(301))
	XCTAssertEqual(msg.repeatedStringArray.count, Int(2))
	XCTAssertEqual(msg.repeatedStringArray.object(at: 0) as? String, "mno")
	XCTAssertEqual(msg.repeatedStringArray.object(at: 1) as? String, "pqr")
	XCTAssertEqual(msg.repeatedEnumArray.count, UInt(2))
	XCTAssertEqual(msg.repeatedEnumArray.value(at: 0), Message2_Enum.bar.rawValue)
	XCTAssertEqual(msg.repeatedEnumArray.value(at: 1), Message2_Enum.baz.rawValue)
	XCTAssertEqual(msg.repeatedInt64Array.count, UInt(0))
	XCTAssertEqual(msg.mapInt32Int32.count, UInt(2))
	var intValue: Int32 = 0
	XCTAssertTrue(msg.mapInt32Int32.getInt32(&intValue, forKey: 500))
	XCTAssertEqual(intValue, Int32(400))
	XCTAssertTrue(msg.mapInt32Int32.getInt32(&intValue, forKey: 501))
	XCTAssertEqual(intValue, Int32(401))
	XCTAssertEqual(msg.mapStringString.count, Int(2))
	XCTAssertEqual(msg.mapStringString.object(forKey: "bar") as? String, "foo")
	XCTAssertEqual(msg.mapStringString.object(forKey: "xyz") as? String, "abc")
	XCTAssertEqual(msg.mapInt32Enum.count, UInt(2))
	XCTAssertTrue(msg.mapInt32Enum.getEnum(&intValue, forKey:600))
	XCTAssertEqual(intValue, Message2_Enum.bar.rawValue)
	XCTAssertTrue(msg.mapInt32Enum.getEnum(&intValue, forKey:601))
	XCTAssertEqual(intValue, Message2_Enum.baz.rawValue)

	// Clearing a string with nil.
	msg2.optionalString = nil
	XCTAssertFalse(msg2.hasOptionalString)
	XCTAssertEqual(msg2.optionalString, "")

	// Clearing a message with nil.
	msg.optionalGroup = nil
	XCTAssertFalse(msg.hasOptionalGroup)
	XCTAssertTrue(msg.optionalGroup !== msg3) // New instance

	// Clear.
	msg.clear()
	XCTAssertFalse(msg.hasOptionalInt32)
	XCTAssertFalse(msg.hasOptionalString)
	XCTAssertFalse(msg.hasOptionalEnum)
	XCTAssertFalse(msg.hasOptionalMessage)
	XCTAssertFalse(msg.hasOptionalInt64)
	XCTAssertFalse(msg.hasOptionalFloat)
	XCTAssertEqual(msg.optionalInt32, Int32(0))
	XCTAssertEqual(msg.optionalString, "")
	XCTAssertTrue(msg.optional !== msg2) // New instance
	XCTAssertEqual(msg.optionalEnum, Message2_Enum.foo) // Default
	XCTAssertEqual(msg.repeatedInt32Array.count, UInt(0))
	XCTAssertEqual(msg.repeatedStringArray.count, Int(0))
	XCTAssertEqual(msg.repeatedEnumArray.count, UInt(0))
	XCTAssertEqual(msg.mapInt32Int32.count, UInt(0))
	XCTAssertEqual(msg.mapStringString.count, Int(0))
	XCTAssertEqual(msg.mapInt32Enum.count, UInt(0))
	}

	func testProto3Basics() {
	let msg = Message3()
	let msg2 = Message3()

	msg.optionalInt32 = 100
	msg.optionalString = "abc"
	msg.optionalEnum = .bar
	msg2.optionalString = "other"
	msg.optional = msg2
	msg.repeatedInt32Array.addValue(300)
	msg.repeatedInt32Array.addValue(301)
	msg.repeatedStringArray.add("mno")
	msg.repeatedStringArray.add("pqr")
	// "proto3" syntax lets enum get unknown values.
	msg.repeatedEnumArray.addValue(Message3_Enum.bar.rawValue)
	msg.repeatedEnumArray.addRawValue(666)
	SetMessage3_OptionalEnum_RawValue(msg2, 666)
	msg.mapInt32Int32.setInt32(400, forKey:500)
	msg.mapInt32Int32.setInt32(401, forKey:501)
	msg.mapStringString.setObject("foo", forKey:"bar" as NSString)
	msg.mapStringString.setObject("abc", forKey:"xyz" as NSString)
	msg.mapInt32Enum.setEnum(Message2_Enum.bar.rawValue, forKey:600)
	// "proto3" syntax lets enum get unknown values.
	msg.mapInt32Enum.setRawValue(666, forKey:601)

	// Has only exists on for message fields.
	XCTAssertTrue(msg.hasOptionalMessage)
	XCTAssertFalse(msg2.hasOptionalMessage)

	// Check values.
	XCTAssertEqual(msg.optionalInt32, Int32(100))
	XCTAssertEqual(msg.optionalString, "abc")
	XCTAssertEqual(msg2.optionalString, "other")
	XCTAssertTrue(msg.optional === msg2)
	XCTAssertEqual(msg.optionalEnum, Message3_Enum.bar)
	XCTAssertEqual(msg.repeatedInt32Array.count, UInt(2))
	XCTAssertEqual(msg.repeatedInt32Array.value(at: 0), Int32(300))
	XCTAssertEqual(msg.repeatedInt32Array.value(at: 1), Int32(301))
	XCTAssertEqual(msg.repeatedStringArray.count, Int(2))
	XCTAssertEqual(msg.repeatedStringArray.object(at: 0) as? String, "mno")
	XCTAssertEqual(msg.repeatedStringArray.object(at: 1) as? String, "pqr")
	XCTAssertEqual(msg.repeatedInt64Array.count, UInt(0))
	XCTAssertEqual(msg.repeatedEnumArray.count, UInt(2))
	XCTAssertEqual(msg.repeatedEnumArray.value(at: 0), Message3_Enum.bar.rawValue)
	XCTAssertEqual(msg.repeatedEnumArray.value(at: 1), Message3_Enum.gpbUnrecognizedEnumeratorValue.rawValue)
	XCTAssertEqual(msg.repeatedEnumArray.rawValue(at: 1), 666)
	XCTAssertEqual(msg2.optionalEnum, Message3_Enum.gpbUnrecognizedEnumeratorValue)
	XCTAssertEqual(Message3_OptionalEnum_RawValue(msg2), Int32(666))
	XCTAssertEqual(msg.mapInt32Int32.count, UInt(2))
	var intValue: Int32 = 0
	XCTAssertTrue(msg.mapInt32Int32.getInt32(&intValue, forKey:500))
	XCTAssertEqual(intValue, Int32(400))
	XCTAssertTrue(msg.mapInt32Int32.getInt32(&intValue, forKey:501))
	XCTAssertEqual(intValue, Int32(401))
	XCTAssertEqual(msg.mapStringString.count, Int(2))
	XCTAssertEqual(msg.mapStringString.object(forKey: "bar") as? String, "foo")
	XCTAssertEqual(msg.mapStringString.object(forKey: "xyz") as? String, "abc")
	XCTAssertEqual(msg.mapInt32Enum.count, UInt(2))
	XCTAssertTrue(msg.mapInt32Enum.getEnum(&intValue, forKey:600))
	XCTAssertEqual(intValue, Message2_Enum.bar.rawValue)
	XCTAssertTrue(msg.mapInt32Enum.getEnum(&intValue, forKey:601))
	XCTAssertEqual(intValue, Message3_Enum.gpbUnrecognizedEnumeratorValue.rawValue)
	XCTAssertTrue(msg.mapInt32Enum.getRawValue(&intValue, forKey:601))
	XCTAssertEqual(intValue, 666)

	// Clearing a string with nil.
	msg2.optionalString = nil
	XCTAssertEqual(msg2.optionalString, "")

	// Clearing a message with nil.
	msg.optional = nil
	XCTAssertFalse(msg.hasOptionalMessage)
	XCTAssertTrue(msg.optional !== msg2) // New instance

	// Clear.
	msg.clear()
	XCTAssertFalse(msg.hasOptionalMessage)
	XCTAssertEqual(msg.optionalInt32, Int32(0))
	XCTAssertEqual(msg.optionalString, "")
	XCTAssertTrue(msg.optional !== msg2) // New instance
	XCTAssertEqual(msg.optionalEnum, Message3_Enum.foo) // Default
	XCTAssertEqual(msg.repeatedInt32Array.count, UInt(0))
	XCTAssertEqual(msg.repeatedStringArray.count, Int(0))
	XCTAssertEqual(msg.repeatedEnumArray.count, UInt(0))
	msg2.clear()
	XCTAssertEqual(msg2.optionalEnum, Message3_Enum.foo) // Default
	XCTAssertEqual(Message3_OptionalEnum_RawValue(msg2), Message3_Enum.foo.rawValue)
	XCTAssertEqual(msg.mapInt32Int32.count, UInt(0))
	XCTAssertEqual(msg.mapStringString.count, Int(0))
	XCTAssertEqual(msg.mapInt32Enum.count, UInt(0))
	}

	func testAutoCreation() {
	let msg = Message2()

	XCTAssertFalse(msg.hasOptionalGroup)
	XCTAssertFalse(msg.hasOptionalMessage)

	// Access shouldn't result in has* but should return objects.
	let msg2 = msg.optionalGroup
	let msg3 = msg.optional.optional
	let msg4 = msg.optional
	XCTAssertNotNil(msg2)
	XCTAssertNotNil(msg3)
	XCTAssertFalse(msg.hasOptionalGroup)
	XCTAssertFalse(msg.optional.hasOptionalMessage)
	XCTAssertFalse(msg.hasOptionalMessage)

	// Setting things should trigger has* getting set.
	msg.optionalGroup.a = 10
	msg.optional.optional.optionalInt32 = 100
	XCTAssertTrue(msg.hasOptionalGroup)
	XCTAssertTrue(msg.optional.hasOptionalMessage)
	XCTAssertTrue(msg.hasOptionalMessage)

	// And they should be the same pointer as before.
	XCTAssertTrue(msg2 === msg.optionalGroup)
	XCTAssertTrue(msg3 === msg.optional.optional)
	XCTAssertTrue(msg4 === msg.optional)

	// Clear gets us new objects next time around.
	msg.clear()
	XCTAssertFalse(msg.hasOptionalGroup)
	XCTAssertFalse(msg.optional.hasOptionalMessage)
	XCTAssertFalse(msg.hasOptionalMessage)
	msg.optionalGroup.a = 20
	msg.optional.optional.optionalInt32 = 200
	XCTAssertTrue(msg.hasOptionalGroup)
	XCTAssertTrue(msg.optional.hasOptionalMessage)
	XCTAssertTrue(msg.hasOptionalMessage)
	XCTAssertTrue(msg2 !== msg.optionalGroup)
	XCTAssertTrue(msg3 !== msg.optional.optional)
	XCTAssertTrue(msg4 !== msg.optional)

	// Explicit set of a message, means autocreated object doesn't bind.
	msg.clear()
	let autoCreated = msg.optional
	XCTAssertFalse(msg.hasOptionalMessage)
	let msg5 = Message2()
	msg5.optionalInt32 = 123
	msg.optional = msg5
	XCTAssertTrue(msg.hasOptionalMessage)
	// Modifying the autocreated doesn't replaced the explicit set one.
	autoCreated?.optionalInt32 = 456
	XCTAssertTrue(msg.hasOptionalMessage)
	XCTAssertTrue(msg.optional === msg5)
	XCTAssertEqual(msg.optional.optionalInt32, Int32(123))
	}

	func testProto2OneOfSupport() {
	let msg = Message2()

	XCTAssertEqual(msg.oOneOfCase, Message2_O_OneOfCase.gpbUnsetOneOfCase)
	XCTAssertEqual(msg.oneofInt32, Int32(100)) // Default
	XCTAssertEqual(msg.oneofFloat, Float(110.0)) // Default
	XCTAssertEqual(msg.oneofEnum, Message2_Enum.baz) // Default
	let autoCreated = msg.oneof // Default create one.
	XCTAssertNotNil(autoCreated)
	XCTAssertEqual(msg.oOneOfCase, Message2_O_OneOfCase.gpbUnsetOneOfCase)

	msg.oneofInt32 = 10
	XCTAssertEqual(msg.oneofInt32, Int32(10))
	XCTAssertEqual(msg.oneofFloat, Float(110.0)) // Default
	XCTAssertEqual(msg.oneofEnum, Message2_Enum.baz) // Default
	XCTAssertTrue(msg.oneof === autoCreated) // Still the same
	XCTAssertEqual(msg.oOneOfCase, Message2_O_OneOfCase.oneofInt32)

	msg.oneofFloat = 20.0
	XCTAssertEqual(msg.oneofInt32, Int32(100)) // Default
	XCTAssertEqual(msg.oneofFloat, Float(20.0))
	XCTAssertEqual(msg.oneofEnum, Message2_Enum.baz) // Default
	XCTAssertTrue(msg.oneof === autoCreated) // Still the same
	XCTAssertEqual(msg.oOneOfCase, Message2_O_OneOfCase.oneofFloat)

	msg.oneofEnum = .bar
	XCTAssertEqual(msg.oneofInt32, Int32(100)) // Default
	XCTAssertEqual(msg.oneofFloat, Float(110.0)) // Default
	XCTAssertEqual(msg.oneofEnum, Message2_Enum.bar)
	XCTAssertTrue(msg.oneof === autoCreated) // Still the same
	XCTAssertEqual(msg.oOneOfCase, Message2_O_OneOfCase.oneofEnum)

	// Sets via the autocreated instance.
	msg.oneof.optionalInt32 = 200
	XCTAssertEqual(msg.oneofInt32, Int32(100)) // Default
	XCTAssertEqual(msg.oneofFloat, Float(110.0)) // Default
	XCTAssertEqual(msg.oneofEnum, Message2_Enum.baz) // Default
	XCTAssertTrue(msg.oneof === autoCreated) // Still the same
	XCTAssertEqual(msg.oneof.optionalInt32, Int32(200))
	XCTAssertEqual(msg.oOneOfCase, Message2_O_OneOfCase.oneofMessage)

	// Clear the oneof.
	Message2_ClearOOneOfCase(msg)
	XCTAssertEqual(msg.oneofInt32, Int32(100)) // Default
	XCTAssertEqual(msg.oneofFloat, Float(110.0)) // Default
	XCTAssertEqual(msg.oneofEnum, Message2_Enum.baz) // Default
	let autoCreated2 = msg.oneof // Default create one
	XCTAssertNotNil(autoCreated2)
	XCTAssertTrue(autoCreated2 !== autoCreated) // New instance
	XCTAssertEqual(msg.oneof.optionalInt32, Int32(0)) // Default
	XCTAssertEqual(msg.oOneOfCase, Message2_O_OneOfCase.gpbUnsetOneOfCase)

	msg.oneofInt32 = 10
	XCTAssertEqual(msg.oneofInt32, Int32(10))
	XCTAssertEqual(msg.oOneOfCase, Message2_O_OneOfCase.oneofInt32)

	// Confirm Message.clear() handles the oneof correctly.
	msg.clear()
	XCTAssertEqual(msg.oneofInt32, Int32(100)) // Default
	XCTAssertEqual(msg.oOneOfCase, Message2_O_OneOfCase.gpbUnsetOneOfCase)

	// Sets via the autocreated instance.
	msg.oneof.optionalInt32 = 300
	XCTAssertTrue(msg.oneof !== autoCreated) // New instance
	XCTAssertTrue(msg.oneof !== autoCreated2) // New instance
	XCTAssertEqual(msg.oneof.optionalInt32, Int32(300))
	XCTAssertEqual(msg.oOneOfCase, Message2_O_OneOfCase.oneofMessage)

	// Set message to nil clears the oneof.
	msg.oneof = nil
	XCTAssertEqual(msg.oneof.optionalInt32, Int32(0)) // Default
	XCTAssertEqual(msg.oOneOfCase, Message2_O_OneOfCase.gpbUnsetOneOfCase)
	}

	func testProto3OneOfSupport() {
	let msg = Message3()

	XCTAssertEqual(msg.oOneOfCase, Message3_O_OneOfCase.gpbUnsetOneOfCase)
	XCTAssertEqual(msg.oneofInt32, Int32(0)) // Default
	XCTAssertEqual(msg.oneofFloat, Float(0.0)) // Default
	XCTAssertEqual(msg.oneofEnum, Message3_Enum.foo) // Default
	let autoCreated = msg.oneof // Default create one.
	XCTAssertNotNil(autoCreated)
	XCTAssertEqual(msg.oOneOfCase, Message3_O_OneOfCase.gpbUnsetOneOfCase)

	msg.oneofInt32 = 10
	XCTAssertEqual(msg.oneofInt32, Int32(10))
	XCTAssertEqual(msg.oneofFloat, Float(0.0)) // Default
	XCTAssertEqual(msg.oneofEnum, Message3_Enum.foo) // Default
	XCTAssertTrue(msg.oneof === autoCreated) // Still the same
	XCTAssertEqual(msg.oOneOfCase, Message3_O_OneOfCase.oneofInt32)

	msg.oneofFloat = 20.0
	XCTAssertEqual(msg.oneofInt32, Int32(0)) // Default
	XCTAssertEqual(msg.oneofFloat, Float(20.0))
	XCTAssertEqual(msg.oneofEnum, Message3_Enum.foo) // Default
	XCTAssertTrue(msg.oneof === autoCreated) // Still the same
	XCTAssertEqual(msg.oOneOfCase, Message3_O_OneOfCase.oneofFloat)

	msg.oneofEnum = .bar
	XCTAssertEqual(msg.oneofInt32, Int32(0)) // Default
	XCTAssertEqual(msg.oneofFloat, Float(0.0)) // Default
	XCTAssertEqual(msg.oneofEnum, Message3_Enum.bar)
	XCTAssertTrue(msg.oneof === autoCreated) // Still the same
	XCTAssertEqual(msg.oOneOfCase, Message3_O_OneOfCase.oneofEnum)

	// Sets via the autocreated instance.
	msg.oneof.optionalInt32 = 200
	XCTAssertEqual(msg.oneofInt32, Int32(0)) // Default
	XCTAssertEqual(msg.oneofFloat, Float(0.0)) // Default
	XCTAssertEqual(msg.oneofEnum, Message3_Enum.foo) // Default
	XCTAssertTrue(msg.oneof === autoCreated) // Still the same
	XCTAssertEqual(msg.oneof.optionalInt32, Int32(200))
	XCTAssertEqual(msg.oOneOfCase, Message3_O_OneOfCase.oneofMessage)

	// Clear the oneof.
	Message3_ClearOOneOfCase(msg)
	XCTAssertEqual(msg.oneofInt32, Int32(0)) // Default
	XCTAssertEqual(msg.oneofFloat, Float(0.0)) // Default
	XCTAssertEqual(msg.oneofEnum, Message3_Enum.foo) // Default
	let autoCreated2 = msg.oneof // Default create one
	XCTAssertNotNil(autoCreated2)
	XCTAssertTrue(autoCreated2 !== autoCreated) // New instance
	XCTAssertEqual(msg.oneof.optionalInt32, Int32(0)) // Default
	XCTAssertEqual(msg.oOneOfCase, Message3_O_OneOfCase.gpbUnsetOneOfCase)

	msg.oneofInt32 = 10
	XCTAssertEqual(msg.oneofInt32, Int32(10))
	XCTAssertEqual(msg.oOneOfCase, Message3_O_OneOfCase.oneofInt32)

	// Confirm Message.clear() handles the oneof correctly.
	msg.clear()
	XCTAssertEqual(msg.oneofInt32, Int32(0)) // Default
	XCTAssertEqual(msg.oOneOfCase, Message3_O_OneOfCase.gpbUnsetOneOfCase)

	// Sets via the autocreated instance.
	msg.oneof.optionalInt32 = 300
	XCTAssertTrue(msg.oneof !== autoCreated) // New instance
	XCTAssertTrue(msg.oneof !== autoCreated2) // New instance
	XCTAssertEqual(msg.oneof.optionalInt32, Int32(300))
	XCTAssertEqual(msg.oOneOfCase, Message3_O_OneOfCase.oneofMessage)

	// Set message to nil clears the oneof.
	msg.oneof = nil
	XCTAssertEqual(msg.oneof.optionalInt32, Int32(0)) // Default
	XCTAssertEqual(msg.oOneOfCase, Message3_O_OneOfCase.gpbUnsetOneOfCase)
	}

	func testSerialization() {
	let msg = Message2()

	msg.optionalInt32 = 100
	msg.optionalInt64 = 101
	msg.optionalGroup.a = 102
	msg.repeatedStringArray.add("abc")
	msg.repeatedStringArray.add("def")
	msg.mapInt32Int32.setInt32(200, forKey:300)
	msg.mapInt32Int32.setInt32(201, forKey:201)
	msg.mapStringString.setObject("foo", forKey:"bar" as NSString)
	msg.mapStringString.setObject("abc", forKey:"xyz" as NSString)

	let data = msg.data()

	let msg2 = try! Message2(data: data!)
	XCTAssertTrue(msg2 !== msg) // New instance
	XCTAssertEqual(msg.optionalInt32, Int32(100))
	XCTAssertEqual(msg.optionalInt64, Int64(101))
	XCTAssertEqual(msg.optionalGroup.a, Int32(102))
	XCTAssertEqual(msg.repeatedStringArray.count, Int(2))
	XCTAssertEqual(msg.mapInt32Int32.count, UInt(2))
	XCTAssertEqual(msg.mapStringString.count, Int(2))
	XCTAssertEqual(msg2, msg)
	}

	}