Separate readUInt64LE fixtures from writeUInt64LE; add two more tests: "n < 0" & "0 < n < 1"

test/bufferutils.spec.ts

@@ -42,7 +42,7 @@ describe('bufferutils', () => {
       });
     });
 
-    fixtures.invalid.readUInt64LE.forEach(f => {
+    fixtures.invalid.writeUInt64LE.forEach(f => {
       it('throws on ' + f.description, () => {
         const buffer = Buffer.alloc(8, 0);
 

test/fixtures/bufferutils.json

@@ -71,6 +71,32 @@
         "hex": "0100000000002000",
         "dec": 9007199254740993
       }
+    ],
+    "writeUInt64LE": [
+      {
+        "description": "n === 2^53",
+        "exception": "RangeError: value out of range",
+        "hex": "0000000000002000",
+        "dec": 9007199254740992
+      },
+      {
+        "description": "n > 2^53",
+        "exception": "RangeError: value out of range",
+        "hex": "0100000000002000",
+        "dec": 9007199254740993
+      },
+      {
+        "description": "n < 0",
+        "exception": "specified a negative value for writing an unsigned value",
+        "hex": "",
+        "dec": -1
+      },
+      {
+        "description": "0 < n < 1",
+        "exception": "value has a fractional component",
+        "hex": "",
+        "dec": 0.1
+      }
     ]
   }
 }