spec: add specs for only selected provisional comments displayed to student

fixes: GRADE-1390

Test Plan:
	jenkins passes

Change-Id: Ia6a36e3965c82f0c1d326b8ddfb6f7ba2ac9852f
Reviewed-on: https://gerrit.instructure.com/160709
Tested-by: Jenkins
Reviewed-by: Derek Bender <djbender@instructure.com>
Reviewed-by: Spencer Olson <solson@instructure.com>
Product-Review: James Butters <jbutters@instructure.com>
QA-Review: James Butters <jbutters@instructure.com>

spec/selenium/grades/moderation/moderated_marking_spec.rb

@@ -164,15 +164,15 @@ describe 'Moderated Marking' do
       ModeratePage.click_post_grades_button
       driver.switch_to.alert.accept
       wait_for_ajaximations
-      # wait for info header stating grades are posted
-      wait = Selenium::WebDriver::Wait.new(timeout: 5)
-      wait.until { ff("#content header div").size > 3 }
+      # wait for element to exist, means page has loaded
+      ModeratePage.grades_posted_button
+
       # unmute using Display to Students button
       ModeratePage.click_display_to_students_button
       driver.switch_to.alert.accept
       wait_for_ajaximations
-      # wait for flash alert stating grades are visible to students
-      wait.until {ff("#flashalert_message_holder div").size > 1}
+      # wait for element to exist, means page has loaded
+      ModeratePage.grades_posted_button
 
       # switch session to student
       user_session(@student1)
@@ -181,6 +181,43 @@ describe 'Moderated Marking' do
       expect(StudentGradesPage.fetch_assignment_score(@moderated_assignment)).to eq '15'
     end
 
+    it 'displays comments from chosen grader', priority: "1", test_id: 3513994 do
+      skip('Unskip in GRADE-1326')
+      submissions = @moderated_assignment.find_or_create_submissions([@student1, @student2])
+
+      submissions.each do |submission|
+        submission.add_comment(author: @teacher1, comment: 'Just a comment by teacher1')
+        submission.add_comment(author: @teacher2, comment: 'Just a comment by teacher2')
+      end
+
+      # select a provisional grade for each student
+      ModeratePage.select_provisional_grade_for_student_by_position(@student1, 1)
+      ModeratePage.select_provisional_grade_for_student_by_position(@student2, 2)
+
+      # post the grades
+      ModeratePage.click_post_grades_button
+      driver.switch_to.alert.accept
+      wait_for_ajaximations
+      # wait for element to exist, means page has loaded
+      ModeratePage.grades_posted_button
+
+      # unmute using Display to Students button
+      ModeratePage.click_display_to_students_button
+      driver.switch_to.alert.accept
+      wait_for_ajaximations
+      # wait for element to exist, means page has loaded
+      ModeratePage.grades_visible_to_students_button
+
+      # switch session to student
+      user_session(@student1)
+
+      StudentGradesPage.visit_as_student(@moderated_course)
+      StudentGradesPage.comment_button.click
+
+      expect(StudentGradesPage.comments(@moderated_assignment).count).to eq 1
+      expect(StudentGradesPage.comments(@moderated_assignment).first).to include_text 'Just a comment by teacher1'
+    end
+
     it 'display to students button disabled until grades are posted', priority: '1', test_id: 3513991 do
       expect(ModeratePage.display_to_students_button).to be_disabled
     end

spec/selenium/grades/pages/moderate_page.rb

@@ -121,7 +121,11 @@ class ModeratePage
     end
 
     def display_to_students_button
-      fj("button:contains('Display')")
+      fj("button:contains('Display to Students')")
+    end
+
+    def grades_visible_to_students_button
+      fj("button:contains('Grades Visible to Students')")
     end
 
     def page_buttons

spec/selenium/grades/pages/student_grades_page.rb

@@ -87,6 +87,14 @@ class StudentGradesPage
       f("#submission_#{assignment_id} .assignment_score .grade").text
     end
 
+    def comment_button
+      ffxpath('//a[@aria-label="Read comments"]').select(&:displayed?).first
+    end
+
+    def comments(assignment)
+      ff("#comments_thread_#{assignment.id} table tbody tr")
+    end
+
     def fetch_assignment_score(assignment)
       if assignment.grading_type == "letter_grade"
         assignment_row(assignment).find_element(css: '.assignment_score .score_value').text