def test_find_post_with_invalid_categories(self):
try:
Post.find_post_by_category("")
self.fail("Expect InvalidFieldError")
except InvalidFieldError:
pass
def test_find_post_with_not_exist_keyword(self):
posts = Post.find_post_by_category("Java")
self.assertEqual(len(posts), 0)
def test_find_post_with_valid_info(self):
posts = Post.find_post_by_category("Python", 1, 3)
self.assertEqual(len(posts), 3)
def test_find_post_with_out_of_range_index(self):
posts = Post.find_post_by_category("C++", 4, 7)
self.assertEqual(len(posts), 0)
def test_find_post_with_invalid_pagination_param(self):
posts = Post.find_post_by_category("NON IT", 0, -2)
self.assertEqual(len(posts), 7)
