Measure unit test coverage of test utils

awx/ui_next/jest.config.js

@@ -1,6 +1,7 @@
 module.exports = {
   collectCoverageFrom: [
-    'src/**/*.{js,jsx}'
+    'src/**/*.{js,jsx}',
+    'testUtils/**/*.{js,jsx}'
   ],
   coveragePathIgnorePatterns: [
     '<rootDir>/src/locales',

awx/ui_next/testUtils/enzymeHelpers.test.jsx

@@ -146,11 +146,8 @@ describe('waitForElement', () => {
     } catch (err) {
       error = err;
     } finally {
-      expect(error).toEqual(
-        new Error(
-          'Expected condition for <#does-not-exist> not met: el => el.length === 1'
-        )
-      );
+      expect(error.message).toContain('Expected condition for <#does-not-exist> not met');
+      expect(error.message).toContain('el.length === 1');
       done();
     }
   });