test: check error message in test-fs-make-callback

Add a RegExp to `throws` assertions.

PR-URL: nodejs#10914
Reviewed-By: Colin Ihrig <[email protected]>
Reviewed-By: Michaël Zasso <[email protected]>
Reviewed-By: Italo A. Casas <[email protected]>
Reviewed-By: Rich Trott <[email protected]>
Reviewed-By: Luigi Pinca <[email protected]>
Reviewed-By: James M Snell <[email protected]>

test/parallel/test-fs-make-callback.js

@@ -2,6 +2,7 @@
 const common = require('../common');
 const assert = require('assert');
 const fs = require('fs');
+const cbTypeError = /^TypeError: "callback" argument must be a function$/;
 
 function test(cb) {
   return function() {
@@ -26,13 +27,13 @@ process.once('warning', common.mustCall((warning) => {
 assert.doesNotThrow(test());
 
 function invalidArgumentsTests() {
-  assert.throws(test(null));
-  assert.throws(test(true));
-  assert.throws(test(false));
-  assert.throws(test(1));
-  assert.throws(test(0));
-  assert.throws(test('foo'));
-  assert.throws(test(/foo/));
-  assert.throws(test([]));
-  assert.throws(test({}));
+  assert.throws(test(null), cbTypeError);
+  assert.throws(test(true), cbTypeError);
+  assert.throws(test(false), cbTypeError);
+  assert.throws(test(1), cbTypeError);
+  assert.throws(test(0), cbTypeError);
+  assert.throws(test('foo'), cbTypeError);
+  assert.throws(test(/foo/), cbTypeError);
+  assert.throws(test([]), cbTypeError);
+  assert.throws(test({}), cbTypeError);
 }