From 9ec2963be075aea95c8e6b7e677850f4f8ab15ca Mon Sep 17 00:00:00 2001
From: Ryan P Kilby <kilbyr@gmail.com>
Date: Wed, 22 May 2019 18:21:21 -0700
Subject: [PATCH] Test init for fields w/ lazy translations

---
 tests/importable/__init__.py       | 17 ++++++++++++++++-
 tests/importable/test_installed.py | 17 ++++++++++++++---
 2 files changed, 30 insertions(+), 4 deletions(-)

diff --git a/tests/importable/__init__.py b/tests/importable/__init__.py
index b36599027..ded08258c 100644
--- a/tests/importable/__init__.py
+++ b/tests/importable/__init__.py
@@ -1 +1,16 @@
-from rest_framework import compat  # noqa
+"""
+This test "app" exists to ensure that parts of Django REST Framework can be
+imported/invoked before Django itself has been fully initialized.
+"""
+
+from rest_framework import compat, serializers  # noqa
+
+
+# test initializing fields with lazy translations
+class ExampleSerializer(serializers.Serializer):
+    charfield = serializers.CharField(min_length=1, max_length=2)
+    integerfield = serializers.IntegerField(min_value=1, max_value=2)
+    floatfield = serializers.FloatField(min_value=1, max_value=2)
+    decimalfield = serializers.DecimalField(max_digits=10, decimal_places=1, min_value=1, max_value=2)
+    durationfield = serializers.DurationField(min_value=1, max_value=2)
+    listfield = serializers.ListField(min_length=1, max_length=2)
diff --git a/tests/importable/test_installed.py b/tests/importable/test_installed.py
index 072d3b2e4..c7e53af23 100644
--- a/tests/importable/test_installed.py
+++ b/tests/importable/test_installed.py
@@ -4,10 +4,21 @@ from tests import importable
 
 
 def test_installed():
-    # ensure that apps can freely import rest_framework.compat
+    # ensure the test app hasn't been removed from the test suite
     assert 'tests.importable' in settings.INSTALLED_APPS
 
 
-def test_imported():
-    # ensure that the __init__ hasn't been mucked with
+def test_compat():
     assert hasattr(importable, 'compat')
+
+
+def test_serializer_fields_initialization():
+    assert hasattr(importable, 'ExampleSerializer')
+
+    serializer = importable.ExampleSerializer()
+    assert 'charfield' in serializer.fields
+    assert 'integerfield' in serializer.fields
+    assert 'floatfield' in serializer.fields
+    assert 'decimalfield' in serializer.fields
+    assert 'durationfield' in serializer.fields
+    assert 'listfield' in serializer.fields