如何使用Flask測試模板上下文變量

Question

Django的測試客戶端返回一個測試Response對象，該對象包含用於呈現模板的模板上下文變量。 https://docs.djangoproject.com/en/dev/topics/testing/#django.test.client.Response.context

在Flask中測試時如何訪問模板上下文變量？

示例視圖：

@pgt.route('/myview')
def myview():
    context = {
        'var1': 'value 1',
        'var2': 'value 2',
        'var3': 'value 3',
    }
    return render_template('mytemplate.html', **context)

示例測試：

class MyViewTestCase(unittest.TestCase):
    def setUp(self):
        self.app = create_app()
        self.client = self.app.test_client()

    def test_get_success(self):
        response = self.client.get('/pgt/myview')

        # I don't want to do this
        self.assertIn('value 1', response.data)

        # I want to do something like this
        self.assertEqual(response.template_context['var1'], 'value 1')

Answer 1

感謝@andrewwatts，我使用了（一個版本的） Flask-Testing

from flask.ext.testing import TestCase


class MyViewTestCase(TestCase):
    def create_app(self):
        # This method is required by flask.ext.testing.TestCase. It is called
        # before setUp().
        return create_app()

    def test_get_success(self):
        response = self.client.get('/pgt/myview')
        self.assertEqual(self.get_context_variable('var1'), 'value 1')

Answer 2

根據這些有限的信息，我建議將生成上下文的代碼分解為一個單獨的單元並直接測試。 映射上面的示例：

def get_context():
    context = {
        'var1': 'value 1',
        'var2': 'value 2',
        'var3': 'value 3',
    }
    return context

@pgt.route('/myview')
def myview():
    return render_template('mytemplate.html', **get_context())