test/tc/truncate.rb in rio-0.4.2 vs test/tc/truncate.rb in rio-0.5.1

@@ -18,22 +18,120 @@
     super
     self.class.once unless @@once
 
   end
 
-  def test_basic
+  def setup_files(tag)
     str = "1234567890"
-    f = rio("out")
-    f.print!(str)
-    assert_equal(str,f.contents)
-    assert_equal(str.size,f.size)
-    n = 5
-    f.truncate(n)
-    assert_equal(str[0,n],f.contents)
-    assert_equal(n,f.size)
-    n = 2
-    assert_equal(str[0,n],f.read(n))
-    assert_equal(n,f.truncate.size)
-    assert_equal(str[0,n],f.contents)
+    fnbase = "out." + tag
+    fnruby = fnbase + '.ruby'
+    rio(fnruby).print!(str)
+    fnrio = fnbase + '.rio'
+    rio(fnrio).print!(str)
+    [str,fnruby,fnrio]
   end
+
+  def do_changesize(str,fnruby,fnrio,inc)
+    n = str.size + inc
+    File.truncate(fnruby,n)
+    rio(fnrio).truncate(n)
+    assert_equal(File.size(fnruby),rio(fnrio).size)
+    assert_equal(n,rio(fnrio).size)
+
+    fruby_contents = nil
+    f = File.open(fnruby,'r') do |io|
+      fruby_contents = io.read
+    end
+    assert_equal(fruby_contents, rio(fnrio).contents)
+  end
+
+  def test_setup
+    str,fnruby,fnrio = setup_files('setup')
+
+    assert_equal(File.size(fnruby),rio(fnrio).size)
+
+    fruby_contents = nil
+    f = File.open(fnruby,'r') do |io|
+      fruby_contents = io.read
+    end
+    assert_equal(fruby_contents, rio(fnrio).contents)
+  end
+
+  def test_nochange
+    str,fnruby,fnrio = setup_files('nochange')
+
+    File.truncate(fnruby,str.size)
+    rio(fnrio).truncate(str.size)
+    assert_equal(File.size(fnruby),rio(fnrio).size)
+  end
+
+  def test_clear1
+    str,fnrio1,fnrio2 = setup_files('clear1a')
+
+    assert_equal(rio(fnrio1).truncate(0).size,rio(fnrio2).clear.size)
+    str,fnrio1,fnrio2 = setup_files('clear1b')
+    assert_equal(rio(fnrio1).truncate(0).contents,rio(fnrio2).clear.contents)
+  end
+
+  def test_clear2
+    str,fnrio1,fnrio2 = setup_files('clear2a')
+
+    assert_equal(rio(fnrio1).truncate.size,rio(fnrio2).clear.size)
+    str,fnrio1,fnrio2 = setup_files('cleara')
+    assert_equal(rio(fnrio1).truncate.contents,rio(fnrio2).clear.contents)
+  end
+
+  def test_clear3
+    str,fnrio1,fnrio2 = setup_files('clear3a')
+
+    assert_equal(0,rio(fnrio2).clear.size)
+
+    str,fnrio1,fnrio2 = setup_files('clear3b')
+    assert_equal("",rio(fnrio2).clear.contents)
+  end
+
+  def test_shorten
+    str,fnruby,fnrio = setup_files('shorten')
+    do_changesize(str,fnruby,fnrio,-1)
+  end
+
+  def test_lengthen
+    str,fnruby,fnrio = setup_files('lengthen')
+    do_changesize(str,fnruby,fnrio,1)
+  end
+
+  def test_shorten_to_zero
+    str,fnruby,fnrio = setup_files('shorten_to_zero')
+    do_changesize(str,fnruby,fnrio,-str.size)
+  end
+
+  def test_shorten_to_less_than_zero
+    str,fnruby,fnrio = setup_files('shorten_to_less_than_zero')
+    n = -1
+    assert_raise Errno::EINVAL do
+      File.truncate(fnruby,n)
+    end
+    assert_equal(str.size,File.size(fnruby))
+
+    rio(fnrio).truncate(n)
+    assert_equal(0,rio(fnrio).size)
+    assert_equal("",rio(fnrio).contents)
+    #do_changesize(str,fnruby,fnrio,-(str.size+1))
+  end
+
+  def test_nonexistent
+    str,fnruby,fnrio = setup_files('nonexistent')
+    ::File.unlink(fnruby)
+    assert!(rio(fnruby).exist?)
+    assert_raise Errno::ENOENT do
+      File.truncate(fnruby,0)
+    end
+    ::File.unlink(fnrio)
+    assert!(rio(fnrio).exist?)
+    rio(fnrio).truncate(0)
+    assert_equal(0,rio(fnrio).size)
+    assert_equal("",rio(fnrio).contents)
+  end
+
+
 
 end