build: polish up bazel karma saucelabs info tools/saucelabs/README.md (angular#35667)

PR Close angular#35667

Author: gregmagolan

tools/saucelabs/README.md

@@ -6,17 +6,28 @@ Setup your `SAUCE_USERNAME`, `SAUCE_ACCESS_KEY` & `SAUCE_TUNNEL_IDENTIFIER` envi
 
 To run tests use:
 
-```
+``` bash
 yarn bazel run //tools/saucelabs:sauce_service_setup
 yarn bazel test //path/to:saucelabs_test_target_1 --config=saucelabs [--config=ivy]
 yarn bazel test //path/to:saucelabs_test_target_2 --config=saucelabs [--config=ivy]
 ```
 
-or if the tests are combined into a test suite:
+`bazel query` is required gather up all karma saucelabs test labels so they can be run in one command as they are tagged `manual`.
+
+Running all ViewEngine karma tests in Saucelabs:
 
+``` bash
+yarn bazel run //tools/saucelabs:sauce_service_setup
+TESTS=$(./node_modules/.bin/bazel query --output label '(kind(karma_web_test, ...) intersect attr("tags", "saucelabs", ...)) except attr("tags", "ivy-only", ...) except attr("tags", "fixme-saucelabs-ve", ...)')
+yarn bazel test --config=saucelabs ${TESTS}
 ```
+
+Running all Ivy karma tests in Saucelabs:
+
+``` bash
 yarn bazel run //tools/saucelabs:sauce_service_setup
-yarn bazel test //path/to:saucelabs_test_suite --config=saucelabs [--config=ivy]
+TESTS=$(./node_modules/.bin/bazel query --output label '(kind(karma_web_test, ...) intersect attr("tags", "saucelabs", ...)) except attr("tags", "no-ivy-aot", ...) except attr("tags", "fixme-saucelabs-ivy", ...)')
+yarn bazel test --config=saucelabs --config=ivy ${TESTS}
 ```
 
 To see the test output while the tests are running as these are long tests, add the `--test_output=streamed` option. Note, this option will also prevent bazel from using the test cache and will force the test to run.
@@ -31,21 +42,25 @@ script which configures the saucelabs environment and starts Sauce Connect befor
 
 For example,
 
-```
+``` python
 karma_web_test(
     name = "saucelabs_core_acceptance_tests",
     timeout = "long",
     karma = "//tools/saucelabs:karma-saucelabs",
     tags = [
+        "exclusive",
         "manual",
         "no-remote-exec",
+        "saucelabs",
     ],
     deps = [
         "//packages/core/test/acceptance:acceptance_lib",
     ],
 )
 ```
 
-These saucelabs targets must be tagged `no-remote-exec` as they cannot be executed remotely since
-they require a local Sauce Connect process. They should also be tagged `manual` so they are not
-automatically tested with `//...`.
+These saucelabs targets must have a few important tags:
+*  `no-remote-exec` as they cannot be executed remotely since they require a local Sauce Connect process
+*  `manual` so they are not automatically tested with `//...`
+*  `exclusive` as they must be run serially in order to not over-provision Saucelabs browsers
+*  `saucelabs` so that they can be easily gathered up for testing in a `bazel query`