method

assert_file

v3.2.13 - Show latest stable - 0 notes - Class: Rails::Generators::TestCase

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

Show source

# File railties/lib/rails/generators/test_case.rb, line 88
      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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