Updated handling of the script mirror....

test/mjsunit/mirror-script.js

 // Copyright 2008 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 10 matching lines @@
 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 // Flags: --expose-debug-as debug
 // Test the mirror object for scripts.
 
-function testScriptMirror(f, file_name, file_lines, script_type) {
+function testScriptMirror(f, file_name, file_lines, script_type, script_source) {
   // Create mirror and JSON representation.
   var mirror = debug.MakeMirror(f).script();
   var serializer = debug.MakeMirrorSerializer();
   var json = serializer.serializeValue(mirror);
 
   // Check the mirror hierachy.
   assertTrue(mirror instanceof debug.Mirror);
   assertFalse(mirror instanceof debug.ValueMirror);
   assertTrue(mirror instanceof debug.ScriptMirror);
 
   // Check the mirror properties.
   assertTrue(mirror.isScript());
   assertEquals('script', mirror.type());
   var name = mirror.name();
-  assertEquals(file_name, name.substring(name.length - file_name.length));
+  if (name) {
+    assertEquals(file_name, name.substring(name.length - file_name.length));
+  } else {
+    assertTrue(file_name === null);
+  }
   assertEquals(0, mirror.lineOffset());
   assertEquals(0, mirror.columnOffset());
   if (file_lines > 0) {
     assertEquals(file_lines, mirror.lineCount());
   }
   assertEquals(script_type, mirror.scriptType());
+  if (script_source) {
+    assertEquals(script_source, mirror.source());
+  }
   
   // Parse JSON representation and check.
   var fromJSON = eval('(' + json + ')');
   assertEquals('script', fromJSON.type);
   name = fromJSON.name;
-  assertEquals(file_name, name.substring(name.length - file_name.length));
+  if (name) {
+    assertEquals(file_name, name.substring(name.length - file_name.length));
+  } else {
+    assertTrue(file_name === null);
+  }
   assertEquals(0, fromJSON.lineOffset);
   assertEquals(0, fromJSON.columnOffset);
   if (file_lines > 0) {
     assertEquals(file_lines, fromJSON.lineCount);
   }
   assertEquals(script_type, fromJSON.scriptType);  
 }
 
 
 // Test the script mirror for different functions.
-testScriptMirror(function(){}, 'mirror-script.js', 70, 2);
+testScriptMirror(function(){}, 'mirror-script.js', 92, 2);
 testScriptMirror(Math.sin, 'native math.js', -1, 0);
+testScriptMirror(eval('function(){}'), null, 1, 2, 'function(){}');
+testScriptMirror(eval('function(){\n  }'), null, 2, 2, 'function(){\n  }');
+
+// Test taking slices of source.
+var mirror = debug.MakeMirror(eval('function(){\n  1;\n}')).script();
+assertEquals('function(){\n', mirror.sourceSlice(0, 1).sourceText());
+assertEquals('  1;\n', mirror.sourceSlice(1, 2).sourceText());
+assertEquals('}', mirror.sourceSlice(2, 3).sourceText());
+assertEquals('function(){\n  1;\n', mirror.sourceSlice(0, 2).sourceText());
+assertEquals('  1;\n}', mirror.sourceSlice(1, 3).sourceText());
+assertEquals('function(){\n  1;\n}', mirror.sourceSlice(0, 3).sourceText());