Correcting functionality that produces an invalid date

If the source usage file is not present the date was equal to the
default minimum value

Author: StanleyGoldman

src/GitHub.VisualStudio/Services/UsageService.cs

@@ -113,7 +113,11 @@ public async Task<UsageData> ReadLocalData()
             {
                 return json != null ?
                     SimpleJson.DeserializeObject<UsageData>(json) :
-                    new UsageData { Model = new UsageModel() };
+                    new UsageData
+                    {
+                        Model = new UsageModel() ,
+                        LastUpdated = DateTimeOffset.Now.UtcDateTime
+                    };
             }
             catch(Exception ex)
             {

test/UnitTests/GitHub.VisualStudio/Services/MetricsTests.cs

@@ -474,7 +474,7 @@ public class UsageServiceTests : TestBaseClass
 	}
 }";
 
-        private string storeFileName;
+        private string usageFileName;
         private string userFileName;
         private string localApplicationDataPath;
         private IEnvironment environment;
@@ -496,7 +496,7 @@ public void SetUp()
 
             Directory.CreateDirectory(localApplicationDataPath);
 
-            storeFileName = Path.Combine(localApplicationDataPath, "ghfvs.usage");
+            usageFileName = Path.Combine(localApplicationDataPath, "ghfvs.usage");
             userFileName = Path.Combine(localApplicationDataPath, "user.json");
 
             environment = Substitute.For<IEnvironment>();
@@ -509,7 +509,7 @@ public void SetUp()
 
         private void WriteUsageFileContent(string content)
         {
-            File.WriteAllText(storeFileName, content);
+            File.WriteAllText(usageFileName, content);
         }
         private void WriteUserFileContent(string content)
         {
@@ -524,6 +524,16 @@ public async Task GetUserGuidWorks()
             Assert.IsTrue(guid.Equals(UserGuid));
         }
 
+        [Test]
+        public async Task ReadLocalDataWorksWhenFileMissing()
+        {
+            File.Delete(usageFileName);
+
+            var usageService = new UsageService(Substitute.For<IGitHubServiceProvider>(), environment);
+            var usageData = await usageService.ReadLocalData();
+            Assert.AreEqual(usageData.LastUpdated.Date, DateTimeOffset.Now.Date);
+        }
+
         [Test]
         public void IsSameDayWorks()
         {