1 files changed, 43 insertions, 0 deletions
diff --git a/test/simple/test-string-decoder.js b/test/simple/test-string-decoder.js
index f0a9db8921..3f9dfff487 100644
--- a/test/simple/test-string-decoder.js
+++ b/test/simple/test-string-decoder.js
@@ -46,6 +46,49 @@ s += decoder.write(buffer.slice(2, 3));
 s += decoder.write(buffer.slice(3, 4));
 assert.ok(s.length > 0);
 
+// CESU-8
+buffer = new Buffer('EDA0BDEDB18D', 'hex'); // THUMBS UP SIGN (in CESU-8)
+var s = '';
+s += decoder.write(buffer.slice(0, 1));
+s += decoder.write(buffer.slice(1, 2));
+s += decoder.write(buffer.slice(2, 3)); // complete lead surrogate
+assert.equal(s, '');
+s += decoder.write(buffer.slice(3, 4));
+s += decoder.write(buffer.slice(4, 5));
+s += decoder.write(buffer.slice(5, 6)); // complete trail surrogate
+assert.equal(s, '\uD83D\uDC4D'); // THUMBS UP SIGN (in UTF-16)
+
+var s = '';
+s += decoder.write(buffer.slice(0, 2));
+s += decoder.write(buffer.slice(2, 4)); // complete lead surrogate
+assert.equal(s, '');
+s += decoder.write(buffer.slice(4, 6)); // complete trail surrogate
+assert.equal(s, '\uD83D\uDC4D'); // THUMBS UP SIGN (in UTF-16)
+
+var s = '';
+s += decoder.write(buffer.slice(0, 3)); // complete lead surrogate
+assert.equal(s, '');
+s += decoder.write(buffer.slice(3, 6)); // complete trail surrogate
+assert.equal(s, '\uD83D\uDC4D'); // THUMBS UP SIGN (in UTF-16)
+
+var s = '';
+s += decoder.write(buffer.slice(0, 4)); // complete lead surrogate
+assert.equal(s, '');
+s += decoder.write(buffer.slice(4, 5));
+s += decoder.write(buffer.slice(5, 6)); // complete trail surrogate
+assert.equal(s, '\uD83D\uDC4D'); // THUMBS UP SIGN (in UTF-16)
+
+var s = '';
+s += decoder.write(buffer.slice(0, 5)); // complete lead surrogate
+assert.equal(s, '');
+s += decoder.write(buffer.slice(5, 6)); // complete trail surrogate
+assert.equal(s, '\uD83D\uDC4D'); // THUMBS UP SIGN (in UTF-16)
+
+var s = '';
+s += decoder.write(buffer.slice(0, 6));
+assert.equal(s, '\uD83D\uDC4D'); // THUMBS UP SIGN (in UTF-16)
+
+
 // A mixed ascii and non-ascii string
 // Test stolen from deps/v8/test/cctest/test-strings.cc
 // U+02E4 -> CB A4