path: fix incorrect use of ERR_INVALID_ARG_TYPE

PR-URL: #14011
Reviewed-By: Refael Ackermann <refack@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>

Author: tniessen

lib/path.js

@@ -960,7 +960,7 @@ const win32 = {
   format: function format(pathObject) {
     if (pathObject === null || typeof pathObject !== 'object') {
       throw new errors.TypeError('ERR_INVALID_ARG_TYPE', 'pathObject', 'Object',
-                                typeof pathObject);
+                                 pathObject);
     }
     return _format('\\', pathObject);
   },
@@ -1503,7 +1503,7 @@ const posix = {
   format: function format(pathObject) {
     if (pathObject === null || typeof pathObject !== 'object') {
       throw new errors.TypeError('ERR_INVALID_ARG_TYPE', 'pathObject', 'Object',
-                                typeof pathObject);
+                                 pathObject);
     }
     return _format('/', pathObject);
   },

test/parallel/test-path-parse-format.js

@@ -207,4 +207,19 @@ function checkFormat(path, testCases) {
   testCases.forEach(function(testCase) {
     assert.strictEqual(path.format(testCase[0]), testCase[1]);
   });
+
+  function typeName(value) {
+    return value === null ? 'null' : typeof value;
+  }
+
+  [null, undefined, 1, true, false, 'string'].forEach((pathObject) => {
+    assert.throws(() => {
+      path.format(pathObject);
+    }, common.expectsError({
+      code: 'ERR_INVALID_ARG_TYPE',
+      type: TypeError,
+      message: 'The "pathObject" argument must be of type Object. Received ' +
+               'type ' + typeName(pathObject)
+    }));
+  });
 }