Add tests for post validations

test/system/post_test.rb

@@ -12,7 +12,7 @@ class PostTest < ApplicationSystemTestCase
     assert_current_path new_user_session_url
   end
 
-  test 'Signed in user can create a post' do
+  test 'Signed in user can create a question' do
     category = categories(:meta)
     log_in :standard_user
     visit category_path(category)
@@ -29,7 +29,79 @@ class PostTest < ApplicationSystemTestCase
     end
   end
 
-  # TODO: Post validations
+  test 'Creating a question is blocked when body is too short' do
+    category = categories(:meta)
+    log_in :standard_user
+    visit category_path(category)
+    click_on 'Create Post'
+
+    fill_in 'Summarize your post with a title:', with: 'Initial title is of sufficient length'
+    post_form_select_tag tags(:faq).name
+    fill_in 'Body', with: 'Short'
+
+    # Check that the button is disabled
+    find_button "Save Post in #{category.name}", disabled: true
+
+    # After filling out body correctly, verify that the button becomes enabled
+    fill_in 'Body', with: 'This body should pass the minimum length requirements for questions in the meta category.'
+    find_button "Save Post in #{category.name}", disabled: false
+  end
+
+  test 'Creating a question is blocked when title is too short' do
+    category = categories(:meta)
+    log_in :standard_user
+    visit category_path(category)
+    click_on 'Create Post'
+
+    fill_in 'Body', with: 'This body should pass the minimum length requirements for questions in the meta category.'
+    post_form_select_tag tags(:faq).name
+    fill_in 'Summarize your post with a title:', with: 'Too short'
+
+    # Check that the button is disabled
+    find_button "Save Post in #{category.name}", disabled: true
+
+    # After filling out the title, verify that the button becomes enabled
+    fill_in 'Summarize your post with a title:', with: 'Updated title is of sufficient length'
+    find_button "Save Post in #{category.name}", disabled: false
+  end
+
+  test 'Signed in user gets to pick post type for post creation in categories with multiple types' do
+    category = categories(:main)
+    log_in :standard_user
+    visit category_path(category)
+    click_on 'Create Post'
+
+    # All the top level post types set should be present
+    category.post_types.where(is_top_level: true).each do |pt|
+      assert_link pt.name.underscore.humanize
+    end
+
+    # Pick a non-question post type
+    post_type = category.post_types.where(is_top_level: true).where.not(name: 'Question').first
+
+    # After clicking on a post type, we should be on the creation page of the correct category and post type.
+    click_on post_type.name.underscore.humanize
+    assert_current_path new_category_post_url(post_type.id, category.id)
+  end
+
+  test 'Signed in user can answer question' do
+    log_in :standard_user
+    post = posts(:question_two)
+    visit post_path(post)
+
+    # Answer the question
+    answer_text = 'You can do this by running the rails system tests, rails test:system.'
+    fill_in 'Body', with: answer_text
+    assert_difference 'Post.count' do
+      click_on "Save Post in #{post.category.name}"
+    end
+
+    # We should now be looking at our answer, look for the text on the page
+    assert_text answer_text
+
+    # The original post should also still be on the page
+    assert_text post.body
+  end
 
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