docs: update testing chapter with general test commands

Closes: #18710

Author: Jefiozie

README.md

@@ -113,24 +113,16 @@ as expected.
 
 ## Testing
 
-There are three different test suites which can be run locally:
-
-* Unit tests
-  * Run: `yarn test --full`
-  * Debug: `yarn debug:test --full`
-* Large tests
-  * Run: `yarn test-large --full`
-  * Debug: `yarn debug:test-large --full`
-* End to end tests
-  * Run: `node tests/legacy-cli/run_e2e.js`
-  * Run subset of tests: `node tests/legacy-cli/run_e2e.js tests/legacy-cli/e2e/tests/i18n/ivy-localize-*`
-
-When running the debug commands, Node will stop and wait for a debugger to
-attach. You can attach your IDE to the debugger to stop on breakpoints and step through the code. Also see [IDE Specific Usage](#ide-specific-usage) for a
-simpler debug story.
-
-When debugging a specific test, change `describe()` or `it()` to `fdescribe()`
-and `fit()` to focus execution to just that one test. This will keep the output clean and speed up execution by not running irrelevant tests.
+To test a single package use the full Bazel target example:
+
+`yarn bazel test //packages/schematics/angular:angular_test`
+
+For a a complete list of test targets use the below Bazel query:
+
+`yarn bazel query "tests(//packages/...)"`
+
+> You can find more info about debugging [tests with Bazel in the docs.](https://github.com/angular/angular-cli/blob/master/docs/process/bazel.md#debugging-jasmine_node_test)
+
 
 ## IDE Specific Usage