method

assert_file

v4.0.2 - Show latest stable - 0 notes - Class: Assertions

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What's this?

assert_file(relative, *contents) public

Asserts a given file exists. You need to supply an absolute path or a path relative to the configured destination:

assert_file "config/environment.rb"

You can also give extra arguments. If the argument is a regexp, it will check if the regular expression matches the given file content. If it’s a string, it compares the file with the given string:

assert_file "config/environment.rb", /initialize/

Finally, when a block is given, it yields the file content:

assert_file "app/controllers/products_controller.rb" do |controller|
  assert_instance_method :index, controller do |index|
    assert_match(/Product\.all/, index)
  end
end

Show source

# File railties/lib/rails/generators/testing/assertions.rb, line 23
        def assert_file(relative, *contents)
          absolute = File.expand_path(relative, destination_root)
          assert File.exists?(absolute), "Expected file #{relative.inspect} to exist, but does not"

          read = File.read(absolute) if block_given? || !contents.empty?
          yield read if block_given?

          contents.each do |content|
            case content
              when String
                assert_equal content, read
              when Regexp
                assert_match content, read
            end
          end
        end

assert_file

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