Flask Testing - How to retrieve variables that were passed to Jinja?
<p>In Flask, how can I test what variables were returned to a Jinja template with <code>render_template</code>?</p>

<pre><code>@app.route('/foo/'):
def foo():
    return render_template('foo.html', foo='bar')
</code></pre>

<p>In this example, I want to test that <code>foo</code> is equal to <code>"bar"</code>. </p>

<pre><code>import unittest
from app import app

class TestFoo(unittest.TestCase):
    def test_foo(self):
        with app.test_client() as c:
            r = c.get('/foo/')
            # Prove that the foo variable is equal to "bar"
</code></pre>

<p>How can I do this?</p>