Add unit test for empty query. Replace query with one empty term by empty query on top level

Author: Sergei Vorobev

Jump.Location.Specs/CommandControllerSpec.cs

@@ -291,6 +291,21 @@ public void It_updates_the_database_if_filesystem_is_newer()
 
                 fsMock.VerifyAll();
             }
+
+            [Fact]
+            public void Empty_query_return_most_popular()
+            {
+                dbMock.Setup(x => x.Records).Returns(new[]
+                    {
+                        new Record(@"FS::C:\Users\tkellogg", 10M), 
+                        new Record(@"FS::C:\Users\tkellogg2", 13M), 
+                        new Record(@"FS::C:\Users\tkellogg3", 15M), 
+                    });
+
+                var record = controller.GetMatchesForSearchTerm(new string[] {});
+                record.Select(x => x.Path).ToArray()
+                    .ShouldEqual(new[] { @"C:\Users\tkellogg3", @"C:\Users\tkellogg2", @"C:\Users\tkellogg" });
+            }
 
         }
     }

Jump.Location/CommandController.cs

@@ -109,6 +109,11 @@ private IEnumerable<IRecord> GetMatchesForNormalizedSearchTerm(List<string> sear
         {
             ReloadIfNecessary();
             var matches = new List<IRecord>();
+            // Hack to return everything on empty search query.
+            if (!searchTerms.Any())
+            {
+                searchTerms.Add("");
+            }
             for (var i = 0; i < searchTerms.Count(); i++)
             {
                 var isLast = i == searchTerms.Count()-1;

Jump.Location/JumpLocationCommand.cs

@@ -77,11 +77,11 @@ protected override void ProcessRecord()
                 return;
             }
 
-            if (Query == null) { Query = new string[] { "" }; }
+            if (Query == null) { Query = new string[] {}; }
 
             // If last term is absolute path it's probably because of autocomplition
             // so and we can safely process it here.
-            if (Path.IsPathRooted(Query.Last()))
+            if (Query.Any() && Path.IsPathRooted(Query.Last()))
             {
                 ChangeDirectory(Query.Last());
                 return;