custom assert_select_rjs matcher

Background:
I wanted to test rjs redirection:

assert_select_rjs :redirect_to, '/'

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Problem:
ActionController::Assertions::SelectorAssertions#assert_select_rjs don't know about :redirect_to

Solution:
I don't know if this is the right solution but I added this at the end of my test_helper.rb then I can assert by :redirect_to now

	module ActionController::Assertions::SelectorAssertions
	RJS_STATEMENTS[:redirect_to] = "window\\.location\\.href = #{RJS_ANY_ID}"
	end

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