ruby--ruby/spec/ruby/core/tracepoint/new_spec.rb

require File.expand_path('../../../spec_helper', __FILE__)
require File.expand_path('../fixtures/classes', __FILE__)

describe 'TracePoint.new' do
  it 'returns a new TracePoint object, not enabled by default' do
    TracePoint.new(:call) {}.enabled?.should be_false
  end

  it 'includes :line event when event is not specified' do
    event_name = nil
    TracePoint.new() { |tp| event_name = tp.event }.enable do
      event_name.should equal(:line)

      event_name = nil
      TracePointSpec.test
      event_name.should equal(:line)

      event_name = nil
      TracePointSpec::B.new.foo
      event_name.should equal(:line)
    end
  end

  it 'converts given event name as string into symbol using to_sym' do
    event_name = nil
    (o = mock('return')).should_receive(:to_sym).and_return(:return)

    TracePoint.new(o) { |tp| event_name = tp.event}.enable do
      event_name.should equal(nil)
      TracePointSpec.test
      event_name.should equal(:return)
    end
  end

  it 'includes multiple events when multiple event names are passed as params' do
    event_name = nil
    TracePoint.new(:end, :call) do |tp|
      event_name = tp.event
    end.enable do
      TracePointSpec.test
      event_name.should equal(:call)

      TracePointSpec::B.new.foo
      event_name.should equal(:call)

      class TracePointSpec::B; end
      event_name.should equal(:end)
    end
  end

  it 'raises a TypeError when the given object is not a string/symbol' do
    o = mock('123')
    -> { TracePoint.new(o) {}}.should raise_error(TypeError)

    o.should_receive(:to_sym).and_return(123)
    -> { TracePoint.new(o) {}}.should raise_error(TypeError)
  end

  ruby_bug "#140740", "2.0"..."2.5" do
    it 'expects to be called with a block' do
      -> { TracePoint.new(:line) }.should raise_error(ArgumentError)
    end
  end

  it "raises a Argument error when the give argument doesn't match an event name" do
    -> { TracePoint.new(:test) }.should raise_error(ArgumentError)
  end
end