Fix 16-bit overflow test + knownissue

tests/ecmascript/test-dev-16bit-overflows.js

@@ -44,8 +44,8 @@ function bufferConcatLenTest() {
 
     var s = makeString(32768);
     var t = s.substring(0, 32767);
-    s = Duktape.Buffer(s);
-    t = Duktape.Buffer(t);
+    s = Uint8Array.allocPlain(s);
+    t = Uint8Array.allocPlain(t);
     print(s.length);
     print(t.length);
     var justok = s + t;    // 65535 exactly
@@ -57,9 +57,9 @@ function bufferConcatLenTest() {
 function bufferConstructTest() {
     var b;
 
-    b = new Duktape.Buffer(65535);  // ok
+    b = new Uint8Array(65535);  // ok
     print(b.length);
-    b = new Duktape.Buffer(65536);  // overflow
+    b = new Uint8Array(65536);  // overflow
     print(b.length);
 }
 

tests/knownissues/test-dev-16bit-overflows-3.txt

@@ -0,0 +1,13 @@
+summary: requires lowmem 16-bit field options
+---
+32768
+32767
+65535
+65536
+32768
+32767
+38
+38
+65535
+65536
+Reached: 65535