[rb] Allow focusing tests w/o extra args

Author: p0deje

README.md

@@ -370,7 +370,6 @@ Supported browsers:
 * `safari-preview`
 
 In addition to the [Common Options Examples](#common-options-examples), here are some additional Ruby specific ones:
-* `--test_arg "-tfocus"` - test only [focused specs](https://relishapp.com/rspec/rspec-core/v/3-12/docs/filtering/inclusion-filters)
 * `--test_arg "-eTimeouts"` - test only specs which name include "Timeouts"
 * `--test_arg "<any other RSpec argument>"` - pass any extra RSpec arguments (see `bazel run @bundle//bin:rspec -- --help`)
 

rb/spec/integration/selenium/webdriver/spec_helper.rb

@@ -45,7 +45,9 @@
     GlobalTestEnv.quit_driver
   end
 
-  c.filter_run focus: true if ENV['focus']
+  c.filter_run_when_matching :focus
+  c.run_all_when_everything_filtered = true
+  c.default_formatter = c.files_to_run.count > 1 ? 'progress' : 'doc'
 
   c.before do |example|
     guards = WebDriver::Support::Guards.new(example, bug_tracker: 'https://github.com/SeleniumHQ/selenium/issues')

rb/spec/unit/selenium/webdriver/spec_helper.rb

@@ -58,7 +58,9 @@ def with_env(hash)
 
   c.include Selenium::WebDriver::UnitSpecHelper
 
-  c.filter_run focus: true if ENV['focus']
+  c.filter_run_when_matching :focus
+  c.run_all_when_everything_filtered = true
+  c.default_formatter = c.files_to_run.count > 1 ? 'progress' : 'doc'
 
   c.before do
     # https://github.com/ruby/debug/issues/797