Mock clock and animation frames in TextEditorComponent specs

spec/async-spec-helpers.coffee

@@ -19,9 +19,7 @@ exports.afterEach = (fn) ->
 
 waitsForPromise = (fn) ->
   promise = fn()
-  # This timeout is 3 minutes. We need to bump it back down once we fix backgrounding
-  # of the renderer process on CI. See https://github.com/atom/electron/issues/4317
-  waitsFor 'spec promise to resolve', 3 * 60 * 1000, (done) ->
+  waitsFor 'spec promise to resolve', 5000, (done) ->
     promise.then(
       done,
       (error) ->

spec/spec-helper.coffee

@@ -169,6 +169,13 @@ jasmine.useRealClock = ->
   jasmine.unspy(window, 'clearTimeout')
   jasmine.unspy(_._, 'now')
 
+# The clock is halfway mocked now in a sad and terrible way... only setTimeout
+# and clearTimeout are included. This method will also include setInterval. We
+# would do this everywhere if didn't cause us to break a bunch of package tests.
+jasmine.useMockClock = ->
+  spyOn(window, 'setInterval').andCallFake(fakeSetInterval)
+  spyOn(window, 'clearInterval').andCallFake(fakeClearInterval)
+
 addCustomMatchers = (spec) ->
   spec.addMatchers
     toBeInstanceOf: (expected) ->
@@ -242,7 +249,7 @@ window.resetTimeouts = ->
   window.timeouts = []
   window.intervalTimeouts = {}
 
-window.fakeSetTimeout = (callback, ms) ->
+window.fakeSetTimeout = (callback, ms=0) ->
   id = ++window.timeoutCount
   window.timeouts.push([id, window.now + ms, callback])
   id

src/text-editor-component.coffee

@@ -822,7 +822,6 @@ class TextEditorComponent
 
   sampleBackgroundColors: (suppressUpdate) ->
     {backgroundColor} = getComputedStyle(@hostElement)
-
     @presenter.setBackgroundColor(backgroundColor)
 
     lineNumberGutter = @gutterContainerComponent?.getLineNumberGutterComponent()