test: increase coverage for assertion_error.js

Add a test for long strings and assert.notDeepEqual() to cover code that truncates output when it is longer than 1024 characters. PR-URL: #26065 Reviewed-By: Colin Ihrig <[email protected]> Reviewed-By: Sakthipriyan Vairamani <[email protected]>

Author: Trott

test/parallel/test-assert-deep.js

@@ -659,16 +659,22 @@ assertDeepAndStrictEqual(-0, -0);
 
 assert.deepEqual(newDate(2000,3,14),newDate(2000,3,14));
 
-assert.throws(()=>assert.deepEqual(newDate(),newDate(2000,3,14)),
+assert.throws(()=>{assert.deepEqual(newDate(),newDate(2000,3,14));},
 AssertionError,
 'deepEqual(new Date(), new Date(2000, 3, 14))');
 
 assert.throws(
-()=>assert.notDeepEqual(newDate(2000,3,14),newDate(2000,3,14)),
+()=>{assert.notDeepEqual(newDate(2000,3,14),newDate(2000,3,14));},
 AssertionError,
 'notDeepEqual(new Date(2000, 3, 14), new Date(2000, 3, 14))'
 );
 
+assert.throws(
+()=>{assert.notDeepEqual('a'.repeat(1024),'a'.repeat(1024));},
+AssertionError,
+'notDeepEqual("a".repeat(1024), "a".repeat(1024))'
+);
+
 assert.notDeepEqual(newDate(),newDate(2000,3,14));
 
 assertDeepAndStrictEqual(/a/,/a/);