Add GTMTimeUtils (#229)

Utilities for relatively common desire to know the launch time of an app, or the boot time of a device.

1 files changed, 45 insertions, 0 deletions

diff --git a/Foundation/GTMTimeUtilsTest.m b/Foundation/GTMTimeUtilsTest.m
new file mode 100644
index 0000000..471cad0
--- /dev/null
+++ b/Foundation/GTMTimeUtilsTest.m
@@ -0,0 +1,45 @@
+//
+//  GTMTimeUtilsTest.m
+//
+//  Copyright 2018 Google LLC
+//
+//  Licensed under the Apache License, Version 2.0 (the "License"); you may not
+//  use this file except in compliance with the License.  You may obtain a copy
+//  of the License at
+//
+//  http://www.apache.org/licenses/LICENSE-2.0
+//
+//  Unless required by applicable law or agreed to in writing, software
+//  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+//  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+//  License for the specific language governing permissions and limitations under
+//  the License.
+//
+
+#import "GTMSenTestCase.h"
+#import "GTMTimeUtils.h"
+
+@interface GTMTimeUtilsTest : GTMTestCase
+@end
+
+@implementation GTMTimeUtilsTest
+
+- (void)testAppLaunchDate {
+  // Basic test to verify that "now" is after appLaunch.
+  NSDate *now = [NSDate date];
+  NSDate *appLaunch = GTMAppLaunchDate();
+
+  XCTAssertEqual([now compare:appLaunch], NSOrderedDescending,
+                 @"now: %@ appLaunch: %@", now, appLaunch);
+}
+
+- (void)testBootDate {
+  // Basic test to verify that appLaunch occurred after boot.
+  NSDate *appLaunch = GTMAppLaunchDate();
+  NSDate *boot = GTMBootDate();
+
+  XCTAssertEqual([appLaunch compare:boot], NSOrderedDescending,
+                 @"appLaunch: %@ boot: %@", appLaunch, boot);
+}
+
+@end