Change always passing visible true tests to false.

features/project/commits/comments.feature

@@ -13,11 +13,6 @@ Feature: Project Commits Comments
   Scenario: I can't cancel the main form
     Then I should not see the cancel comment button
 
-  @javascript
-  Scenario: I can't preview without text
-    Given I haven't written any comment text
-    Then The comment preview tab should say there is nothing to do
-
   @javascript
   Scenario: I can preview with text
     Given I write a comment like ":+1: Nice"

features/project/commits/diff_comments.feature

@@ -54,12 +54,6 @@ Feature: Project Commits Diff Comments
     Given I leave a diff comment like "Typo, please fix"
     Then I should see a discussion reply button
 
-  @javascript
-  Scenario: I can't preview without text
-    Given I open a diff comment form
-    And I haven't written any diff comment text
-    Then The diff comment preview tab should say there is nothing to do
-
   @javascript
   Scenario: I can preview with text
     Given I open a diff comment form

features/steps/shared/diff_note.rb

@@ -80,7 +80,7 @@ module SharedDiffNote
 
   step 'I should not see the diff comment text field' do
     within(diff_file_selector) do
-      page.should have_css(".js-note-text", visible: false)
+      expect(find('.js-note-text')).not_to be_visible
     end
   end
 
@@ -115,7 +115,7 @@ module SharedDiffNote
   end
 
   step 'I should see add a diff comment button' do
-    page.should have_css(".js-add-diff-note-button", visible: false)
+    page.should have_css('.js-add-diff-note-button', visible: true)
   end
 
   step 'I should see an empty diff comment form' do

features/steps/shared/note.rb

@@ -64,7 +64,7 @@ module SharedNote
 
   step 'I should not see the comment text field' do
     within(".js-main-target-form") do
-      page.should have_css(".js-note-text", visible: false)
+      expect(find('.js-note-text')).not_to be_visible
     end
   end