spec: fix flaky specs frd

followup to 3ef932cf9a

Change-Id: I1a6aa1ecc6f143242167dd3f22324b4f409c609f
Reviewed-on: https://gerrit.instructure.com/109167
Tested-by: Jenkins
Reviewed-by: Landon Wilkins <lwilkins@instructure.com>
Product-Review: Landon Wilkins <lwilkins@instructure.com>
QA-Review: Landon Wilkins <lwilkins@instructure.com>

spec/selenium/grades/integration/weighting_setup.rb

@@ -5,8 +5,6 @@ module WeightingSetup
   include GradebookSetup
 
   def weighted_grading_setup
-    now = Time.zone.now
-
     enrollment = add_teacher_and_student
     enrollment.workflow_state = 'active'
     enrollment.save!
@@ -16,7 +14,7 @@ module WeightingSetup
 
     @term_name = "First Term"
 
-    create_weighted_grading_periods(now)
+    create_weighted_grading_periods
 
     associate_course_to_term(@term_name)
 
@@ -34,14 +32,25 @@ module WeightingSetup
     @a4.grade_student(@student, grade: 16, grader: @teacher)
   end
 
-  def create_weighted_grading_periods(now)
+  def create_weighted_grading_periods()
+    # :sigh: ... in the case of SRGB, the grading period dropdown behavior
+    # is "interesting"... specifically 1. only the first change event
+    # records your preference, 2. if its value doesn't change, no
+    # preference is recorded and 3. if no preference is recorded, the
+    # selected value can change from one page load to the next (say, if a
+    # period becomes current due to crossing a minute boundary)
+    #
+    # so play it safe and make sure neither period will be current during
+    # the specs. also why does SRGB need a page refresh to work at all?
+    # :noideadog: (╯°□°)╯︵ ┻━┻
+
     backend_group_helper = Factories::GradingPeriodGroupHelper.new
     @gpg = backend_group_helper.create_for_account_with_term(Account.default, @term_name)
     @gpg.update_attributes(display_totals_for_all_grading_periods: true)
 
     backend_period_helper = Factories::GradingPeriodHelper.new
     @gp1 = backend_period_helper.create_for_group(@gpg, {
-      start_date: now, end_date: 2.weeks.from_now, title: 'grading period one'
+      start_date: 1.hour.from_now, end_date: 2.weeks.from_now, title: 'grading period one'
     })
 
     @gp2 = backend_period_helper.create_for_group(@gpg, {