ruby--ruby/spec/ruby/shared/kernel/raise.rb

describe :kernel_raise, shared: true do
  before :each do
    ScratchPad.clear
  end

  it "aborts execution" do
    -> do
      @object.raise Exception, "abort"
      ScratchPad.record :no_abort
    end.should raise_error(Exception, "abort")

    ScratchPad.recorded.should be_nil
  end

  it "accepts an exception that implements to_hash" do
    custom_error = Class.new(StandardError) do
      def to_hash
        {}
      end
    end
    error = custom_error.new
    -> { @object.raise(error) }.should raise_error(custom_error)
  end

  it "allows the message parameter to be a hash" do
    data_error = Class.new(StandardError) do
      attr_reader :data
      def initialize(data)
        @data = data
      end
    end
    -> { @object.raise(data_error, {:data => 42}) }.should raise_error(data_error) do |ex|
      ex.data.should == {:data => 42}
    end
  end

  it "raises RuntimeError if no exception class is given" do
    -> { @object.raise }.should raise_error(RuntimeError, "")
  end

  it "raises a given Exception instance" do
    error = RuntimeError.new
    -> { @object.raise(error) }.should raise_error(error)
  end

  it "raises a RuntimeError if string given" do
    -> { @object.raise("a bad thing") }.should raise_error(RuntimeError)
  end

  it "passes no arguments to the constructor when given only an exception class" do
    klass = Class.new(Exception) do
      def initialize
      end
    end
    -> { @object.raise(klass) }.should raise_error(klass) { |e| e.message.should == klass.to_s }
  end

  it "raises a TypeError when passed a non-Exception object" do
    -> { @object.raise(Object.new) }.should raise_error(TypeError)
  end

  it "raises a TypeError when passed true" do
    -> { @object.raise(true) }.should raise_error(TypeError)
  end

  it "raises a TypeError when passed false" do
    -> { @object.raise(false) }.should raise_error(TypeError)
  end

  it "raises a TypeError when passed nil" do
    -> { @object.raise(nil) }.should raise_error(TypeError)
  end

  it "re-raises a previously rescued exception without overwriting the backtrace" do
    # This spec is written using #backtrace and matching the line number
    # from the string, as backtrace_locations is a more advanced
    # method that is not always supported by implementations.
    #
    initial_raise_line = nil
    raise_again_line = nil
    raised_again = nil

    if defined?(FiberSpecs::NewFiberToRaise) and @object == FiberSpecs::NewFiberToRaise
      fiber = Fiber.new do
        begin
          initial_raise_line = __LINE__; Fiber.yield
        rescue => raised
          begin
            raise_again_line = __LINE__; Fiber.yield raised
          rescue => raised_again
            raised_again
          end
        end
      end
      fiber.resume
      raised = fiber.raise 'raised'
      raised_again = fiber.raise raised
    else
      begin
        initial_raise_line = __LINE__; @object.raise 'raised'
      rescue => raised
        begin
          raise_again_line = __LINE__; @object.raise raised
        rescue => raised_again
          raised_again
        end
      end
    end

    raised_again.backtrace.first.should include("#{__FILE__}:#{initial_raise_line}:")
    raised_again.backtrace.first.should_not include("#{__FILE__}:#{raise_again_line}:")
  end

  it "allows Exception, message, and backtrace parameters" do
    -> do
      @object.raise(ArgumentError, "message", caller)
    end.should raise_error(ArgumentError, "message")
  end
end