add objectivec/test and objectivec/docs

objectivec/test/ort_training_utils_test.mm

@@ -0,0 +1,26 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License.
+
+#import <XCTest/XCTest.h>
+#import "ort_training_session.h"
+
+NS_ASSUME_NONNULL_BEGIN
+
+@interface ORTTrainingUtilsTest : XCTestCase
+@end
+
+@implementation ORTTrainingUtilsTest
+
+- (void)setUp {
+  [super setUp];
+
+  self.continueAfterFailure = NO;
+}
+
+- (void)testSetSeed {
+  ORTSetSeed(2718);
+}
+
+@end
+
+NS_ASSUME_NONNULL_END