How to check the order of appearance on django test

Question

I use this sentences to check the letters line1 and line2 appears.

self.assertContains(response,"line1"); self.assertContains(response,"line2");

However I want to check the order of appearance.

I checked in this page, but can't figure out which I should use.

https://docs.djangoproject.com/en/2.2/topics/testing/tools/#django.test.SimpleTestCase.assertContains

Answer 1

Are you saying you want to assert that line 1 appears in the response before line2?

There isn't (probably; I haven't checked but would be quite surprised) a specific command that would assert that.

Instead, use find() to get the indices of where in the response line1 and line2 are found, then compare them.

EDIT: But be aware that if the content isn't found, find will return -1. A solution could be to first just use your assertContains to check that line1 and line2 are present, and after that use find() to verify that one comes before the other.

Answer 2

You can also try doing that with regex.

# This will match the line where "line1" appears first, then anything in between and then "line2".
regex_expression = r"line1.*line2"

self.assertRegex(response, regex)

If you don't like it then use .index() method.

self.assertContains(response,"line1")
self.assertContains(response,"line2")

line1_index = response.index("line1")
line2_index = response.index("line2")

self.assertTrue(line1_index < line2_index)