fast_copy.rb in vex-0.4.4

- old
+ new

@@ -2,11 +2,11 @@
   # fast_copy a file: This hardlinks the source file to the destfile,
   # if possible. src must refer to a file; dest must refer to a file
   # or not exist at all.
   def fast_copy(src, dest)
     src_stat = File.stat(src)
-    invalid_argument!(src) unless src_stat.file?
+    invalid_argument!(src, "This is not a file") unless src_stat.file?
     
     dest_stat = begin
       File.stat(dest) 
     rescue Errno::ENOENT
     end
@@ -29,11 +29,10 @@
 
 FileUtils.extend FileUtils::FastCopy
 
 module FileUtils::FastCopy::Etest
   def test_fast_copy
-    assert File.exist?(__FILE__)
     File.unlink("tmp/somedata.dat") if File.exist?("tmp/somedata.dat")
 
     assert !File.exist?("tmp/somedata.dat")
     FileUtils.fast_copy __FILE__, "tmp/somedata.dat"
     assert_equal File.read("tmp/somedata.dat"), File.read(__FILE__)
@@ -56,6 +55,20 @@
 
     assert_raise(Errno::ENOENT) {  
       FileUtils.fast_copy __FILE__, "tmp/nonexisting/dir"
     }
   end
+
+  def test_fast_copy_slow
+    File.touch("tmp/somedata.dat")
+    assert File.exist?("tmp/somedata.dat")
+
+    File.stubs(:stat).with(__FILE__).returns({ :file => true, :dev => 1 }.slop)
+    File.stubs(:stat).with("tmp/somedata.dat").returns({ :file => true, :dev => 2 }.slop)
+
+    FileUtils.expects(:copy).with(__FILE__, "tmp/somedata.dat")
+    FileUtils.fast_copy __FILE__, "tmp/somedata.dat"
+
+    File.unlink("tmp/somedata.dat")
+  end
+
 end if VEX_TEST == "base"