How to post to a url in capybara?

@mallory_cormier 

To post to a URL in Capybara, you can use the following steps:

1. In your Capybara test, use the visit method to navigate to the URL that you want to post to:

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visit '/url'

1. Use the page.driver.post method to send a POST request to the URL, passing in the URL and any parameters that you want to send in the request body:

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page.driver.post '/url', { param1: 'value1', param2: 'value2' }

1. You can then perform assertions on the response received from the server, using Capybara's built-in matchers:

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expect(page).to have_content 'Success message'

By following these steps, you can simulate posting to a URL in Capybara and test the behavior of your application accordingly.