21460 the order of template loader works the order of template loader works refs 21460 21460 the order of template loader works the order of template loader works refs 21460
import os

from django.core.exceptions import ImproperlyConfigured
from django.template import Context
from django.template.engine import Engine
from django.test import SimpleTestCase, override_settings

from .utils import ROOT, TEMPLATE_DIR

OTHER_DIR = os.path.join(ROOT, "other_templates")


class EngineTest(SimpleTestCase):
    def test_repr_empty(self):
        engine = Engine()
        self.assertEqual(
            repr(engine),
            "<Engine: app_dirs=False debug=False loaders=[("
            "'django.template.loaders.cached.Loader', "
            "['django.template.loaders.filesystem.Loader'])] "
            "string_if_invalid='' file_charset='utf-8' builtins=["
            "'django.template.defaulttags', 'django.template.defaultfilters', "
            "'django.template.loader_tags'] autoescape=True>",
        )

    def test_repr(self):
        engine = Engine(
            dirs=[TEMPLATE_DIR],
            context_processors=["django.template.context_processors.debug"],
            debug=True,
            loaders=["django.template.loaders.filesystem.Loader"],
            string_if_invalid="x",
            file_charset="utf-16",
            libraries={"custom": "template_tests.templatetags.custom"},
            autoescape=False,
        )
        self.assertEqual(
            repr(engine),
            f"<Engine: dirs=[{TEMPLATE_DIR!r}] app_dirs=False "
            "context_processors=['django.template.context_processors.debug'] "
            "debug=True loaders=['django.template.loaders.filesystem.Loader'] "
            "string_if_invalid='x' file_charset='utf-16' "
            "libraries={'custom': 'template_tests.templatetags.custom'} "
            "builtins=['django.template.defaulttags', "
            "'django.template.defaultfilters', 'django.template.loader_tags'] "
            "autoescape=False>",
        )


class RenderToStringTest(SimpleTestCase):
    def setUp(self):
        self.engine = Engine(dirs=[TEMPLATE_DIR])

    def test_basic_context(self):
        self.assertEqual(
            self.engine.render_to_string("test_context.html", {"obj": "test"}),
            "obj:test\n",
        )

    def test_autoescape_off(self):
        engine = Engine(dirs=[TEMPLATE_DIR], autoescape=False)
        self.assertEqual(
            engine.render_to_string("test_context.html", {"obj": "<script>"}),
            "obj:<script>\n",
        )


class GetDefaultTests(SimpleTestCase):
    @override_settings(TEMPLATES=[])
    def test_no_engines_configured(self):
        msg = "No DjangoTemplates backend is configured."
        with self.assertRaisesMessage(ImproperlyConfigured, msg):
            Engine.get_default()

    @override_settings(
        TEMPLATES=[
            {
                "NAME": "default",
                "BACKEND": "django.template.backends.django.DjangoTemplates",
                "OPTIONS": {"file_charset": "abc"},
            }
        ]
    )
    def test_single_engine_configured(self):
        self.assertEqual(Engine.get_default().file_charset, "abc")

    @override_settings(
        TEMPLATES=[
            {
                "NAME": "default",
                "BACKEND": "django.template.backends.django.DjangoTemplates",
                "OPTIONS": {"file_charset": "abc"},
            },
            {
                "NAME": "other",
                "BACKEND": "django.template.backends.django.DjangoTemplates",
                "OPTIONS": {"file_charset": "def"},
            },
        ]
    )
    def test_multiple_engines_configured(self):
        self.assertEqual(Engine.get_default().file_charset, "abc")


class LoaderTests(SimpleTestCase):
    def test_origin(self):
        engine = Engine(dirs=[TEMPLATE_DIR], debug=True)
        template = engine.get_template("index.html")
        self.assertEqual(template.origin.template_name, "index.html")

    def test_loader_priority(self):
        
        loaders = [
            "django.template.loaders.filesystem.Loader",
            "django.template.loaders.app_directories.Loader",
        ]
        engine = Engine(dirs=[OTHER_DIR, TEMPLATE_DIR], loaders=loaders)
        template = engine.get_template("priority/foo.html")
        self.assertEqual(template.render(Context()), "priority\n")

    def test_cached_loader_priority(self):
        
        loaders = [
            (
                "django.template.loaders.cached.Loader",
                [
                    "django.template.loaders.filesystem.Loader",
                    "django.template.loaders.app_directories.Loader",
                ],
            ),
        ]
        engine = Engine(dirs=[OTHER_DIR, TEMPLATE_DIR], loaders=loaders)

        template = engine.get_template("priority/foo.html")
        self.assertEqual(template.render(Context()), "priority\n")

        template = engine.get_template("priority/foo.html")
        self.assertEqual(template.render(Context()), "priority\n")