require 'test/unit'

class TestSetTraceFunc < Test::Unit::TestCase
  def setup
    @original_compile_option = RubyVM::InstructionSequence.compile_option
    RubyVM::InstructionSequence.compile_option = {
      :trace_instruction => true,
      :specialized_instruction => false
    }
  end

  def teardown
    set_trace_func(nil)
    RubyVM::InstructionSequence.compile_option = @original_compile_option
  end

  def test_c_call
    events = []
    eval <<-EOF.gsub(/^.*?: /, "")
     1: set_trace_func(Proc.new { |event, file, lineno, mid, binding, klass|
     2:   events << [event, lineno, mid, klass]
     3: })
     4: x = 1 + 1
     5: set_trace_func(nil)
    EOF
    assert_equal(["c-return", 3, :set_trace_func, Kernel],
                 events.shift)
    assert_equal(["line", 4, __method__, self.class],
                 events.shift)
    assert_equal(["c-call", 4, :+, Fixnum],
                 events.shift)
    assert_equal(["c-return", 4, :+, Fixnum],
                 events.shift)
    assert_equal(["line", 5, __method__, self.class],
                 events.shift)
    assert_equal(["c-call", 5, :set_trace_func, Kernel],
                 events.shift)
    assert_equal([], events)
  end

  def test_call
    events = []
    eval <<-EOF.gsub(/^.*?: /, "")
     1: set_trace_func(Proc.new { |event, file, lineno, mid, binding, klass|
     2:   events << [event, lineno, mid, klass]
     3: })
     4: def add(x, y)
     5:   x + y
     6: end
     7: x = add(1, 1)
     8: set_trace_func(nil)
    EOF
    assert_equal(["c-return", 3, :set_trace_func, Kernel],
                 events.shift)
    assert_equal(["line", 4, __method__, self.class],
                 events.shift)
    assert_equal(["c-call", 4, :method_added, Module],
                 events.shift)
    assert_equal(["c-return", 4, :method_added, Module],
                 events.shift)
    assert_equal(["line", 7, __method__, self.class],
                 events.shift)
    assert_equal(["call", 4, :add, self.class],
                 events.shift)
    assert_equal(["line", 5, :add, self.class],
                 events.shift)
    assert_equal(["c-call", 5, :+, Fixnum],
                 events.shift)
    assert_equal(["c-return", 5, :+, Fixnum],
                 events.shift)
    assert_equal(["return", 4, :add, self.class],
                 events.shift)
    assert_equal(["line", 8, __method__, self.class],
                 events.shift)
    assert_equal(["c-call", 8, :set_trace_func, Kernel],
                 events.shift)
    assert_equal([], events)
  end

  def test_class
    events = []
    eval <<-EOF.gsub(/^.*?: /, "")
     1: set_trace_func(Proc.new { |event, file, lineno, mid, binding, klass|
     2:   events << [event, lineno, mid, klass]
     3: })
     4: class Foo
     5:   def bar
     6:   end
     7: end
     8: x = Foo.new.bar
     9: set_trace_func(nil)
    EOF
    assert_equal(["c-return", 3, :set_trace_func, Kernel],
                 events.shift)
    assert_equal(["line", 4, __method__, self.class],
                 events.shift)
    assert_equal(["c-call", 4, :inherited, Class],
                 events.shift)
    assert_equal(["c-return", 4, :inherited, Class],
                 events.shift)
    assert_equal(["class", 7, nil, nil],
                 events.shift)
    assert_equal(["line", 5, nil, nil],
                 events.shift)
    assert_equal(["c-call", 5, :method_added, Module],
                 events.shift)
    assert_equal(["c-return", 5, :method_added, Module],
                 events.shift)
    assert_equal(["end", 7, nil, nil],
                 events.shift)
    assert_equal(["line", 8, __method__, self.class],
                 events.shift)
    assert_equal(["c-call", 8, :new, Class],
                 events.shift)
    assert_equal(["c-call", 8, :initialize, BasicObject],
                 events.shift)
    assert_equal(["c-return", 8, :initialize, BasicObject],
                 events.shift)
    assert_equal(["c-return", 8, :new, Class],
                 events.shift)
    assert_equal(["call", 5, :bar, Foo],
                 events.shift)
    assert_equal(["return", 5, :bar, Foo],
                 events.shift)
    assert_equal(["line", 9, __method__, self.class],
                 events.shift)
    assert_equal(["c-call", 9, :set_trace_func, Kernel],
                 events.shift)
    assert_equal([], events)
  end

  def test_raise
    events = []
    eval <<-EOF.gsub(/^.*?: /, "")
     1: set_trace_func(Proc.new { |event, file, lineno, mid, binding, klass|
     2:   events << [event, lineno, mid, klass]
     3: })
     4: begin
     5:   raise TypeError, "error"
     6: rescue TypeError
     7: end
     8: set_trace_func(nil)
    EOF
    assert_equal(["c-return", 3, :set_trace_func, Kernel],
                 events.shift)
    assert_equal(["line", 4, __method__, self.class],
                 events.shift)
    assert_equal(["line", 5, __method__, self.class],
                 events.shift)
    assert_equal(["c-call", 5, :raise, Kernel],
                 events.shift)
    assert_equal(["c-call", 5, :exception, Exception],
                 events.shift)
    assert_equal(["c-call", 5, :initialize, Exception],
                 events.shift)
    assert_equal(["c-return", 5, :initialize, Exception],
                 events.shift)
    assert_equal(["c-return", 5, :exception, Exception],
                 events.shift)
    assert_equal(["c-call", 5, :backtrace, Exception],
                 events.shift)
    assert_equal(["c-return", 5, :backtrace, Exception],
                 events.shift)
    assert_equal(["c-call", 5, :set_backtrace, Exception],
                 events.shift)
    assert_equal(["c-return", 5, :set_backtrace, Exception],
                 events.shift)
    assert_equal(["raise", 5, :test_raise, TestSetTraceFunc],
                 events.shift)
    assert_equal(["c-call", 6, :===, Module],
                 events.shift)
    assert_equal(["c-return", 6, :===, Module],
                 events.shift)
    assert_equal(["line", 8, __method__, self.class],
                 events.shift)
    assert_equal(["c-call", 8, :set_trace_func, Kernel],
                 events.shift)
    assert_equal([], events)
  end

  def test_invalid_proc
    assert_raise(TypeError) { set_trace_func(1) }
  end

  def test_raise_in_trace
    set_trace_func proc {raise rescue nil}
    assert_equal(42, (raise rescue 42), '[ruby-core:24118]')
  end
end
