require File.dirname(__FILE__) + '/spec_helper.rb'
require 'fault_injection.rb'

$LOAD_PATH << File.dirname(__FILE__)

describe "Argument Checking" do
  it "raises if a line number is less than 0" do
	Proc.new{
	  FaultInjection.inject({:file => 'target_00.rb',:line => -5}).should be_true
	}.should raise_error(ArgumentError)
  end

  it "raises if a err_class is not a subclass of Exception" do
	Proc.new {
	  FaultInjection.inject({:file => 'target_00.rb',:line => 1}, 3).should be_true
	}.should raise_error(ArgumentError)
  end
end

describe "'File & line' fault-injection." do
  require 'target_00.rb'

  after(:each) do
	clear
  end
  
  it "works on Hash format for file & line specification" do
	Proc.new{ target_func_00 }.should_not raise_error
	FaultInjection.inject({:file => 'target_00.rb', :line => 9}).should be_true

	begin
	  target_func_00
	  violate "target_func_00 must raise RuntimeError"
	rescue
	  $!.instance_of?(RuntimeError).should be_true
	  $!.backtrace[0].should match(/target_00\.rb/)
	  $target_00['one'].should be_eql(1)
	  $target_00['two'].should be_nil
	  $target_00['three'].should be_nil
	end
  end
  
  it "works on 'file:line' format injection command." do
	Proc.new{ target_func_00 }.should_not raise_error
	
	FaultInjection.inject("target_00.rb:9",
						  SecurityError,
						  "This is a error").should be_true
	Proc.new{
	  target_func_00
	}.should raise_error(SecurityError,"This is a error")
	
  end
end

describe "Method tracing fault-injection" do
  require 'target_02.rb'

  after(:each) do
	clear
  end
  
  it "should check arguments in Array format command." do
	Proc.new{ Bar.new.bar }.should_not raise_error

	Proc.new{ FaultInjection.inject([]) }.should raise_error(ArgumentError)
	Proc.new{ FaultInjection.inject([:Array]) }.should raise_error(ArgumentError)
  end

  it "should inject faults properly with Array format command" do
	Proc.new{ Bar.new.bar }.should_not raise_error
	
	# raise on method calling chane, "Bar#bar --> Foo#foo"
	FaultInjection.inject([:Bar,:bar,:Foo,:foo],RangeError).should be_true
	Proc.new{ Bar.new.bar }.should raise_error(RangeError)
  end
end

describe "Specifying Exception class" do
  require 'target_01.rb'
  
  it "can inject fault with specified Exception class" do
	include FaultInjection
 	inject({:file => 'target_01.rb', :line => 3},ArgumentError).should be_true
	
 	Proc.new{ target_func_01 }.should raise_error(ArgumentError)

	clear
  end
end