Method: MiniTest::Assertions#assert_raises

Defined in:

lib/minitest/unit.rb

#assert_raises(*exp) ⇒ Object

Fails unless the block raises one of exp

# File 'lib/minitest/unit.rb', line 220

def assert_raises *exp
  msg = String === exp.last ? exp.pop : nil
  msg = msg.to_s + "\n" if msg
  should_raise = false
  begin
    yield
    should_raise = true
  rescue MiniTest::Skip => e
    details = "#{msg}#{mu_pp(exp)} exception expected, not"

    if exp.include? MiniTest::Skip then
      return e
    else
      raise e
    end
  rescue Exception => e
    details = "#{msg}#{mu_pp(exp)} exception expected, not"
    assert(exp.any? { |ex|
             ex.instance_of?(Module) ? e.kind_of?(ex) : ex == e.class
           }, exception_details(e, details))

    return e
  end

  exp = exp.first if exp.size == 1
  flunk "#{msg}#{mu_pp(exp)} expected but nothing was raised." if
    should_raise
end