Add test cases for sanitizeForSerialization method in objc client.

samples/client/petstore/objc/SwaggerClientTests/Tests/SWGApiClientTest.m

@@ -1,7 +1,12 @@
 #import <UIKit/UIKit.h>
 #import <XCTest/XCTest.h>
+#import <ISO8601/ISO8601.h>
 #import <SwaggerClient/SWGApiClient.h>
 #import <SwaggerClient/SWGConfiguration.h>
+#import <SwaggerClient/SWGQueryParamCollection.h>
+#import <SwaggerClient/SWGPet.h>
+#import <SwaggerClient/SWGTag.h>
+#import <SwaggerClient/SWGCategory.h>
 
 @interface SWGApiClientTest : XCTestCase
 
@@ -98,4 +103,74 @@
     XCTAssertEqualObjects(basicAuthCredentials, [config getBasicAuthToken]);
 }
 
+- (void)testSanitizeForDeserialization {
+    id result;
+    id data;
+    
+    // nil
+    data = nil;
+    result = [self.apiClient sanitizeForSerialization:data];
+    XCTAssertEqualObjects(result, data);
+    
+    // NSString
+    data = @"test string";
+    result = [self.apiClient sanitizeForSerialization:data];
+    XCTAssertEqualObjects(result, data);
+    
+    // NSNumber
+    data = @1;
+    result = [self.apiClient sanitizeForSerialization:data];
+    XCTAssertEqualObjects(result, data);
+    
+    // SWGQueryParamCollection
+    data = [[SWGQueryParamCollection alloc] init];
+    result = [self.apiClient sanitizeForSerialization:data];
+    XCTAssertEqualObjects(result, data);
+    
+    // NSDate
+    data = [NSDate dateWithISO8601String:@"1997-07-16T19:20:30.45+01:0"];
+    result = [self.apiClient sanitizeForSerialization:data];
+    XCTAssertEqualObjects(result, [data ISO8601String]);
+    
+    // model
+    data = [self createPet];
+    result = [self.apiClient sanitizeForSerialization:data];
+    XCTAssertEqualObjects(result, [data toDictionary]);
+    
+    // NSArray
+    data = @[@1];
+    result = [self.apiClient sanitizeForSerialization:data];
+    XCTAssertEqualObjects(result, data);
+    
+    // NSDictionary
+    data = @{@"test key": @"test value"};
+    result = [self.apiClient sanitizeForSerialization:data];
+    XCTAssertEqualObjects(result, data);
+}
+
+- (SWGPet*) createPet {
+    SWGPet * pet = [[SWGPet alloc] init];
+    pet._id = [[NSNumber alloc] initWithLong:[[NSDate date] timeIntervalSince1970]];
+    pet.name = @"monkey";
+    
+    SWGCategory * category = [[SWGCategory alloc] init];
+    category._id = [[NSNumber alloc] initWithInteger:arc4random_uniform(100000)];
+    category.name = @"super-happy";
+    pet.category = category;
+    
+    SWGTag *tag1 = [[SWGTag alloc] init];
+    tag1._id = [[NSNumber alloc] initWithInteger:arc4random_uniform(100000)];
+    tag1.name = @"test tag 1";
+    SWGTag *tag2 = [[SWGTag alloc] init];
+    tag2._id = [[NSNumber alloc] initWithInteger:arc4random_uniform(100000)];
+    tag2.name = @"test tag 2";
+    pet.tags = (NSArray<SWGTag> *)[[NSArray alloc] initWithObjects:tag1, tag2, nil];
+
+    pet.status = @"available";
+
+    NSArray * photos = [[NSArray alloc] initWithObjects:@"http://foo.bar.com/3", @"http://foo.bar.com/4", nil];
+    pet.photoUrls = photos;
+    return pet;
+}
+
 @end