test building with a header file

spec/build_tests_spec.rb

@@ -3,16 +3,17 @@ require 'fileutils'
 describe Rscons do
   before(:all) do
     FileUtils.rm_rf('build_tests_run')
-    FileUtils.cp_r('build_tests', 'build_tests_run')
     @owd = Dir.pwd
   end
 
   after(:each) do
     Dir.chdir(@owd)
+    FileUtils.rm_rf('build_tests_run')
   end
 
   def test_dir(build_test_directory)
-    Dir.chdir("build_tests_run/#{build_test_directory}")
+    FileUtils.cp_r("build_tests/#{build_test_directory}", 'build_tests_run')
+    Dir.chdir("build_tests_run")
     if File.exists?("build.rb")
       system("ruby -I #{@owd}/lib -r rscons build.rb")
     end
@@ -27,4 +28,10 @@ describe Rscons do
     File.exists?('simple.o').should be_true
     `./simple`.should == "This is a simple C program\n"
   end
+
+  it 'builds a C program with one source file and one header file' do
+    test_dir('header')
+    File.exists?('header.o').should be_true
+    `./header`.should == "The value is 2\n"
+  end
 end