[gjs: 1/10] tests: Use Jasmine's toBeNaN() matcher

[Philip Chimento <pchimento src gnome org>]

commit 4545bcae67bd4679b97196a86c7d616cc39e16cc
Author: Philip Chimento <philip chimento gmail com>
Date:   Fri Feb 11 20:44:11 2022 -0800

    tests: Use Jasmine's toBeNaN() matcher
    
    This is designed for this purpose, use it for conciseness instead of
    Number.isNaN().

 installed-tests/js/testRegress.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/installed-tests/js/testRegress.js b/installed-tests/js/testRegress.js
index 36d062b28..249b69e02 100644
--- a/installed-tests/js/testRegress.js
+++ b/installed-tests/js/testRegress.js
@@ -78,7 +78,7 @@ describe('Life, the Universe and Everything', function () {
             expect(Regress[method](-42)).toBe(-42);
 
             if (['float', 'double'].includes(type)) {
-                expect(Number.isNaN(Regress[method](undefined))).toBeTruthy();
+                expect(Regress[method](undefined)).toBeNaN();
                 expect(Regress[method](42.42)).toBeCloseTo(42.42);
                 expect(Regress[method](-42.42)).toBeCloseTo(-42.42);
             } else {