Adding tests for hub filter

spec/javascripts/unit/darkswarm/filters/filter_hubs_spec.js.coffee

@@ -0,0 +1,45 @@
+describe 'filtering Hubs', ->
+  filter = null
+  filterHubs = null
+  hubs = [{
+    name: "frogs"
+    other: "roger"
+    address:
+      zipcode: "cats"
+      city: "cambridge"
+      state: "kansas"
+  }, {
+    name: "donkeys"
+    other: "roger"
+    address:
+      zipcode: ""
+      city: "Wellington"
+      state: "uzbekistan"
+  }]
+
+  beforeEach ->
+    module 'Darkswarm'
+    inject ($filter) ->
+      filter = $filter
+      filterHubs = $filter('filterHubs')
+
+  it 'has a hub filter', ->
+    expect(filter('filterHubs')).not.toBeNull()
+
+  it "filters by name", ->
+    expect(filterHubs(hubs, 'donkeys').length).toEqual 1
+
+  it "is case insensitive", ->
+    expect(filterHubs(hubs, 'DONKEYS').length).toEqual 1
+
+  it "filters by state", ->
+    expect(filterHubs(hubs, 'kansas').length).toEqual 1
+
+  it "filters by zipcode", ->
+    expect(filterHubs(hubs, 'cats').length).toEqual 1
+
+  it "gives all hubs when no argument is specified", ->
+    expect(filterHubs(hubs, '').length).toEqual 2
+
+  it "does not filter by anything else", ->
+    expect(filterHubs(hubs, 'roger').length).toEqual 0