Factored the generation of JSON serialization from beeing part of the mirror ...

test/mjsunit/mirror-string.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 string values
 
+const kMaxProtocolStringLength = 80; // Constant from mirror-delay.js
+
 function testStringMirror(s) {
   // Create mirror and JSON representation.
   var mirror = debug.MakeMirror(s);
   var json = mirror.toJSONProtocol(true);
 
   // Check the mirror hierachy.
   assertTrue(mirror instanceof debug.Mirror);
   assertTrue(mirror instanceof debug.ValueMirror);
   assertTrue(mirror instanceof debug.StringMirror);
 
   // Check the mirror properties.
   assertTrue(mirror.isString());
   assertEquals('string', mirror.type());
   assertTrue(mirror.isPrimitive());
 
   // Test text representation
-  assertEquals(s, mirror.toText());
+  if (s.length <= kMaxProtocolStringLength) {
+    assertEquals(s, mirror.toText());
+  } else {
+    assertEquals(s.substring(0, kMaxProtocolStringLength),
+                 mirror.toText().substring(0, kMaxProtocolStringLength));
+  }
 
   // Parse JSON representation and check.
   var fromJSON = eval('(' + json + ')');
   assertEquals('string', fromJSON.type);
-  assertEquals(s, fromJSON.value);
+  if (s.length <= kMaxProtocolStringLength) {
+    assertEquals(s, fromJSON.value);
+  } else {
+    assertEquals(s.substring(0, kMaxProtocolStringLength),
+                 fromJSON.value.substring(0, kMaxProtocolStringLength));
+    assertEquals(fromJSON.fromIndex, 0);
+    assertEquals(fromJSON.toIndex, kMaxProtocolStringLength);
+  }
 }
 
-Number =2;
-
 // Test a number of different strings.
 testStringMirror('');
 testStringMirror('abcdABCD');
 testStringMirror('1234');
 testStringMirror('"');
 testStringMirror('"""');
 testStringMirror("'");
 testStringMirror("'''");
 testStringMirror("'\"'");
 testStringMirror('\\');
 testStringMirror('\b\t\n\f\r');
 testStringMirror('\u0001\u0002\u001E\u001F');
 testStringMirror('"a":1,"b":2');
+
+var s = "1234567890"
+s = s + s + s + s + s + s + s + s;
+assertEquals(kMaxProtocolStringLength, s.length);
+testStringMirror(s);
+s = s + 'X';
+testStringMirror(s);