method

assert_template

v4.0.2 - Show latest stable - 0 notes - Class: ActionController::TemplateAssertions

assert_template(options = {}, message = nil) public

Asserts that the request was rendered with the appropriate template file or partials.

# assert that the "new" view template was rendered
assert_template "new"

# assert that the exact template "admin/posts/new" was rendered
assert_template %r{\Aadmin/posts/new\Z}

# assert that the layout 'admin' was rendered
assert_template layout: 'admin'
assert_template layout: 'layouts/admin'
assert_template layout: :admin

# assert that no layout was rendered
assert_template layout: nil
assert_template layout: false

# assert that the "_customer" partial was rendered twice
assert_template partial: '_customer', count: 2

# assert that no partials were rendered
assert_template partial: false

In a view test case, you can also assert that specific locals are passed to partials:

# assert that the "_customer" partial was rendered with a specific object
assert_template partial: '_customer', locals: { customer: @customer }

Show source

# File actionpack/lib/action_controller/test_case.rb, line 95
    def assert_template(options = {}, message = nil)
      # Force body to be read in case the template is being streamed.
      response.body

      case options
      when NilClass, Regexp, String, Symbol
        options = options.to_s if Symbol === options
        rendered = @_templates
        msg = message || sprintf("expecting <%s> but rendering with <%s>",
                options.inspect, rendered.keys)
        matches_template =
          case options
          when String
            !options.empty? && rendered.any? do |t, num|
              options_splited = options.split(File::SEPARATOR)
              t_splited = t.split(File::SEPARATOR)
              t_splited.last(options_splited.size) == options_splited
            end
          when Regexp
            rendered.any? { |t,num| t.match(options) }
          when NilClass
            rendered.blank?
          end
        assert matches_template, msg
      when Hash
        options.assert_valid_keys(:layout, :partial, :locals, :count, :file)

        if options.key?(:layout)
          expected_layout = options[:layout]
          msg = message || sprintf("expecting layout <%s> but action rendered <%s>",
                  expected_layout, @_layouts.keys)

          case expected_layout
          when String, Symbol
            assert_includes @_layouts.keys, expected_layout.to_s, msg
          when Regexp
            assert(@_layouts.keys.any? {|l| l =~ expected_layout }, msg)
          when nil, false
            assert(@_layouts.empty?, msg)
          end
        end

        if options[:file]
          assert_includes @_files.keys, options[:file]
        end

        if expected_partial = options[:partial]
          if expected_locals = options[:locals]
            if defined?(@_rendered_views)
              view = expected_partial.to_s.sub(/^_/, '').sub(/\/_(?=[^\/]+\z)/, '/')

              partial_was_not_rendered_msg = "expected %s to be rendered but it was not." % view
              assert_includes @_rendered_views.rendered_views, view, partial_was_not_rendered_msg

              msg = 'expecting %s to be rendered with %s but was with %s' % [expected_partial,
                                                                             expected_locals,
                                                                             @_rendered_views.locals_for(view)]
              assert(@_rendered_views.view_rendered?(view, options[:locals]), msg)
            else
              warn "the :locals option to #assert_template is only supported in a ActionView::TestCase"
            end
          elsif expected_count = options[:count]
            actual_count = @_partials[expected_partial]
            msg = message || sprintf("expecting %s to be rendered %s time(s) but rendered %s time(s)",
                     expected_partial, expected_count, actual_count)
            assert(actual_count == expected_count.to_i, msg)
          else
            msg = message || sprintf("expecting partial <%s> but action rendered <%s>",
                    options[:partial], @_partials.keys)
            assert_includes @_partials, expected_partial, msg
          end
        elsif options.key?(:partial)
          assert @_partials.empty?,
            "Expected no partials to be rendered"
        end
      else
        raise ArgumentError, "assert_template only accepts a String, Symbol, Hash, Regexp, or nil"
      end
    end

assert_template

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