errors,process: fix error message of hrtime()

process.hrtime() incorrectly passed the function name to
errors.TypeError instead of the name of the argument.
Additionally, the type of the actual argument was added to the error
message and a new error code ERR_INVALID_ARRAY_LENGTH was added.

PR-URL: #13739
Reviewed-By: Timothy Gu <[email protected]>
Reviewed-By: Ben Noordhuis <[email protected]>
Reviewed-By: James M Snell <[email protected]>
Reviewed-By: Anna Henningsen <[email protected]>
Reviewed-By: Luigi Pinca <[email protected]>
Reviewed-By: Colin Ihrig <[email protected]>

Author: tniessen

lib/internal/errors.js

@@ -122,6 +122,15 @@ E('ERR_HTTP_INVALID_CHAR', 'Invalid character in statusMessage.');
 E('ERR_HTTP_INVALID_STATUS_CODE',
   (originalStatusCode) => `Invalid status code: ${originalStatusCode}`);
 E('ERR_INDEX_OUT_OF_RANGE', 'Index out of range');
+E('ERR_INVALID_ARRAY_LENGTH',
+  (name, length, actual) => {
+    let msg = `The "${name}" array must have a length of ${length}`;
+    if (arguments.length > 2) {
+      const len = Array.isArray(actual) ? actual.length : actual;
+      msg += `. Received length ${len}`;
+    }
+    return msg;
+  });
 E('ERR_INVALID_ARG_TYPE', invalidArgType);
 E('ERR_INVALID_CALLBACK', 'callback must be a function');
 E('ERR_INVALID_FD', (fd) => `"fd" must be a positive integer: ${fd}`);

lib/internal/process.js

@@ -78,14 +78,19 @@ function setup_hrtime() {
     _hrtime(hrValues);
 
     if (time !== undefined) {
-      if (Array.isArray(time) && time.length === 2) {
-        const sec = (hrValues[0] * 0x100000000 + hrValues[1]) - time[0];
-        const nsec = hrValues[2] - time[1];
-        const needsBorrow = nsec < 0;
-        return [needsBorrow ? sec - 1 : sec, needsBorrow ? nsec + 1e9 : nsec];
+      if (!Array.isArray(time)) {
+        throw new errors.TypeError('ERR_INVALID_ARG_TYPE', 'time', 'Array',
+                                   time);
       }
-      throw new errors.TypeError('ERR_INVALID_ARG_TYPE',
-                                 'process.hrtime()', 'Array');
+      if (time.length !== 2) {
+        throw new errors.TypeError('ERR_INVALID_ARRAY_LENGTH', 'time', 2,
+                                   time);
+      }
+
+      const sec = (hrValues[0] * 0x100000000 + hrValues[1]) - time[0];
+      const nsec = hrValues[2] - time[1];
+      const needsBorrow = nsec < 0;
+      return [needsBorrow ? sec - 1 : sec, needsBorrow ? nsec + 1e9 : nsec];
     }
 
     return [

test/parallel/test-process-hrtime.js

@@ -32,25 +32,35 @@ validateTuple(tuple);
 // validate that passing an existing tuple returns another valid tuple
 validateTuple(process.hrtime(tuple));
 
-const invalidHrtimeArgument = common.expectsError({
-  code: 'ERR_INVALID_ARG_TYPE',
-  type: TypeError,
-  message: 'The "process.hrtime()" argument must be of type Array'
-});
-
 // test that only an Array may be passed to process.hrtime()
 assert.throws(() => {
   process.hrtime(1);
-}, invalidHrtimeArgument);
+}, common.expectsError({
+  code: 'ERR_INVALID_ARG_TYPE',
+  type: TypeError,
+  message: 'The "time" argument must be of type Array. Received type number'
+}));
 assert.throws(() => {
   process.hrtime([]);
-}, invalidHrtimeArgument);
+}, common.expectsError({
+  code: 'ERR_INVALID_ARRAY_LENGTH',
+  type: TypeError,
+  message: 'The "time" array must have a length of 2. Received length 0'
+}));
 assert.throws(() => {
   process.hrtime([1]);
-}, invalidHrtimeArgument);
+}, common.expectsError({
+  code: 'ERR_INVALID_ARRAY_LENGTH',
+  type: TypeError,
+  message: 'The "time" array must have a length of 2. Received length 1'
+}));
 assert.throws(() => {
   process.hrtime([1, 2, 3]);
-}, invalidHrtimeArgument);
+}, common.expectsError({
+  code: 'ERR_INVALID_ARRAY_LENGTH',
+  type: TypeError,
+  message: 'The "time" array must have a length of 2. Received length 3'
+}));
 
 function validateTuple(tuple) {
   assert(Array.isArray(tuple));