patch(path, parameters = nil, headers_or_env = nil) public

Performs a PATCH request with the given parameters. See #get for more details.

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January 3, 2016
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Setting HTTP_REFERER

If your integration test is checking for correct behavior of a redirect to the request referer, you can set the referring path in the headers hash with syntax like:

patch update_user_role_path, { user: {role: "vip"} }, { 'HTTP_REFERER' => user_url } 
assert_redirected_to user_url