fix(cli): provide a more robust error message if analysis fails

packages/cli/src/bin/cli.test.ts

@@ -180,6 +180,31 @@ describe('cli', () => {
         'Violation of "marquee" with 1 occurrences!'
       );
     });
+
+    it('should throw error if CSS selector is not found', async () => {
+      const result = await runCLI(
+        `file://${SIMPLE_HTML_FILE}`,
+        '--include',
+        '#hazaar'
+      );
+
+      assert.include(
+        result.stderr,
+        'javascript error: No elements found for include in page Context'
+      );
+      assert.equal(result.exitCode, 1);
+    });
+
+    it('should throw error if invalid selector is provided', async () => {
+      const result = await runCLI(
+        `file://${SIMPLE_HTML_FILE}`,
+        '--include',
+        '#123'
+      );
+
+      assert.include(result.stderr, 'is not a valid selector');
+      assert.equal(result.exitCode, 1);
+    });
   });
 
   describe('--exclude', () => {
@@ -194,6 +219,17 @@ describe('cli', () => {
         'Violation of "marquee" with 1 occurrences!'
       );
     });
+
+    it('should throw error if invalid selector is provided', async () => {
+      const result = await runCLI(
+        `file://${SIMPLE_HTML_FILE}`,
+        '--exclude',
+        '#123'
+      );
+
+      assert.include(result.stderr, 'is not a valid selector');
+      assert.equal(result.exitCode, 1);
+    });
   });
 
   describe('--disable', () => {

packages/cli/src/bin/index.ts

@@ -150,7 +150,7 @@ const cli = async (
     if (!showErrors) {
       console.error(error('An error occurred while testing this page.'));
     } else {
-      console.error(error('Error: %j \n $s'), e.message, e.stack);
+      console.error(error('Error: %s'), e);
     }
 
     console.error(

packages/cli/src/lib/axe-test-urls.ts

@@ -1,6 +1,7 @@
 import * as WebDriver from 'selenium-webdriver';
 import AxeBuilder from '@axe-core/webdriverjs';
 import { AxeResults } from 'axe-core';
+import { error } from '../lib/utils';
 import { EventResponse, ConfigParams } from '../types';
 
 const testPages = async (