Restoring authorship annotation for <shadchin@yandex-team.ru>. Commit 1 of 2.

1 files changed, 287 insertions, 287 deletions

diff --git a/contrib/python/Jinja2/py3/tests/test_api.py b/contrib/python/Jinja2/py3/tests/test_api.py
index 4db3b4a96a6..a1e25d0a950 100644
--- a/contrib/python/Jinja2/py3/tests/test_api.py
+++ b/contrib/python/Jinja2/py3/tests/test_api.py
@@ -1,86 +1,86 @@
-import shutil
+import shutil 
 import tempfile
-from pathlib import Path
+from pathlib import Path 
 
 import pytest
-
-from jinja2 import ChainableUndefined
-from jinja2 import DebugUndefined
-from jinja2 import DictLoader
-from jinja2 import Environment
-from jinja2 import is_undefined
-from jinja2 import make_logging_undefined
-from jinja2 import meta
-from jinja2 import StrictUndefined
-from jinja2 import Template
-from jinja2 import TemplatesNotFound
-from jinja2 import Undefined
-from jinja2 import UndefinedError
+ 
+from jinja2 import ChainableUndefined 
+from jinja2 import DebugUndefined 
+from jinja2 import DictLoader 
+from jinja2 import Environment 
+from jinja2 import is_undefined 
+from jinja2 import make_logging_undefined 
+from jinja2 import meta 
+from jinja2 import StrictUndefined 
+from jinja2 import Template 
+from jinja2 import TemplatesNotFound 
+from jinja2 import Undefined 
+from jinja2 import UndefinedError 
 from jinja2.compiler import CodeGenerator
 from jinja2.runtime import Context
 from jinja2.utils import Cycler
-from jinja2.utils import pass_context
-from jinja2.utils import pass_environment
-from jinja2.utils import pass_eval_context
+from jinja2.utils import pass_context 
+from jinja2.utils import pass_environment 
+from jinja2.utils import pass_eval_context 
 
 
-class TestExtendedAPI:
+class TestExtendedAPI: 
     def test_item_and_attribute(self, env):
         from jinja2.sandbox import SandboxedEnvironment
 
         for env in Environment(), SandboxedEnvironment():
-            tmpl = env.from_string("{{ foo.items()|list }}")
-            assert tmpl.render(foo={"items": 42}) == "[('items', 42)]"
+            tmpl = env.from_string("{{ foo.items()|list }}") 
+            assert tmpl.render(foo={"items": 42}) == "[('items', 42)]" 
             tmpl = env.from_string('{{ foo|attr("items")()|list }}')
-            assert tmpl.render(foo={"items": 42}) == "[('items', 42)]"
+            assert tmpl.render(foo={"items": 42}) == "[('items', 42)]" 
             tmpl = env.from_string('{{ foo["items"] }}')
-            assert tmpl.render(foo={"items": 42}) == "42"
-
-    def test_finalize(self):
-        e = Environment(finalize=lambda v: "" if v is None else v)
-        t = e.from_string("{% for item in seq %}|{{ item }}{% endfor %}")
-        assert t.render(seq=(None, 1, "foo")) == "||1|foo"
-
-    def test_finalize_constant_expression(self):
-        e = Environment(finalize=lambda v: "" if v is None else v)
-        t = e.from_string("<{{ none }}>")
-        assert t.render() == "<>"
-
-    def test_no_finalize_template_data(self):
-        e = Environment(finalize=lambda v: type(v).__name__)
-        t = e.from_string("<{{ value }}>")
-        # If template data was finalized, it would print "strintstr".
-        assert t.render(value=123) == "<int>"
-
-    def test_context_finalize(self):
-        @pass_context
-        def finalize(context, value):
-            return value * context["scale"]
-
-        e = Environment(finalize=finalize)
-        t = e.from_string("{{ value }}")
-        assert t.render(value=5, scale=3) == "15"
-
-    def test_eval_finalize(self):
-        @pass_eval_context
-        def finalize(eval_ctx, value):
-            return str(eval_ctx.autoescape) + value
-
-        e = Environment(finalize=finalize, autoescape=True)
-        t = e.from_string("{{ value }}")
-        assert t.render(value="<script>") == "True&lt;script&gt;"
-
-    def test_env_autoescape(self):
-        @pass_environment
-        def finalize(env, value):
-            return " ".join(
-                (env.variable_start_string, repr(value), env.variable_end_string)
-            )
-
-        e = Environment(finalize=finalize)
-        t = e.from_string("{{ value }}")
-        assert t.render(value="hello") == "{{ 'hello' }}"
-
+            assert tmpl.render(foo={"items": 42}) == "42" 
+
+    def test_finalize(self): 
+        e = Environment(finalize=lambda v: "" if v is None else v) 
+        t = e.from_string("{% for item in seq %}|{{ item }}{% endfor %}") 
+        assert t.render(seq=(None, 1, "foo")) == "||1|foo" 
+
+    def test_finalize_constant_expression(self): 
+        e = Environment(finalize=lambda v: "" if v is None else v) 
+        t = e.from_string("<{{ none }}>") 
+        assert t.render() == "<>" 
+ 
+    def test_no_finalize_template_data(self): 
+        e = Environment(finalize=lambda v: type(v).__name__) 
+        t = e.from_string("<{{ value }}>") 
+        # If template data was finalized, it would print "strintstr". 
+        assert t.render(value=123) == "<int>" 
+ 
+    def test_context_finalize(self): 
+        @pass_context 
+        def finalize(context, value): 
+            return value * context["scale"] 
+ 
+        e = Environment(finalize=finalize) 
+        t = e.from_string("{{ value }}") 
+        assert t.render(value=5, scale=3) == "15" 
+ 
+    def test_eval_finalize(self): 
+        @pass_eval_context 
+        def finalize(eval_ctx, value): 
+            return str(eval_ctx.autoescape) + value 
+ 
+        e = Environment(finalize=finalize, autoescape=True) 
+        t = e.from_string("{{ value }}") 
+        assert t.render(value="<script>") == "True&lt;script&gt;" 
+ 
+    def test_env_autoescape(self): 
+        @pass_environment 
+        def finalize(env, value): 
+            return " ".join( 
+                (env.variable_start_string, repr(value), env.variable_end_string) 
+            ) 
+ 
+        e = Environment(finalize=finalize) 
+        t = e.from_string("{{ value }}") 
+        assert t.render(value="hello") == "{{ 'hello' }}" 
+ 
     def test_cycler(self, env):
         items = 1, 2, 3
         c = Cycler(*items)
@@ -103,134 +103,134 @@ class TestExtendedAPI:
         assert expr(foo=42) == 84
 
     def test_template_passthrough(self, env):
-        t = Template("Content")
+        t = Template("Content") 
         assert env.get_template(t) is t
         assert env.select_template([t]) is t
         assert env.get_or_select_template([t]) is t
         assert env.get_or_select_template(t) is t
 
-    def test_get_template_undefined(self, env):
-        """Passing Undefined to get/select_template raises an
-        UndefinedError or shows the undefined message in the list.
-        """
-        env.loader = DictLoader({})
-        t = Undefined(name="no_name_1")
-
-        with pytest.raises(UndefinedError):
-            env.get_template(t)
-
-        with pytest.raises(UndefinedError):
-            env.get_or_select_template(t)
-
-        with pytest.raises(UndefinedError):
-            env.select_template(t)
-
-        with pytest.raises(TemplatesNotFound) as exc_info:
-            env.select_template([t, "no_name_2"])
-
-        exc_message = str(exc_info.value)
-        assert "'no_name_1' is undefined" in exc_message
-        assert "no_name_2" in exc_message
-
+    def test_get_template_undefined(self, env): 
+        """Passing Undefined to get/select_template raises an 
+        UndefinedError or shows the undefined message in the list. 
+        """ 
+        env.loader = DictLoader({}) 
+        t = Undefined(name="no_name_1") 
+ 
+        with pytest.raises(UndefinedError): 
+            env.get_template(t) 
+ 
+        with pytest.raises(UndefinedError): 
+            env.get_or_select_template(t) 
+ 
+        with pytest.raises(UndefinedError): 
+            env.select_template(t) 
+ 
+        with pytest.raises(TemplatesNotFound) as exc_info: 
+            env.select_template([t, "no_name_2"]) 
+ 
+        exc_message = str(exc_info.value) 
+        assert "'no_name_1' is undefined" in exc_message 
+        assert "no_name_2" in exc_message 
+ 
     def test_autoescape_autoselect(self, env):
         def select_autoescape(name):
-            if name is None or "." not in name:
+            if name is None or "." not in name: 
                 return False
-            return name.endswith(".html")
-
-        env = Environment(
-            autoescape=select_autoescape,
-            loader=DictLoader({"test.txt": "{{ foo }}", "test.html": "{{ foo }}"}),
-        )
-        t = env.get_template("test.txt")
-        assert t.render(foo="<foo>") == "<foo>"
-        t = env.get_template("test.html")
-        assert t.render(foo="<foo>") == "&lt;foo&gt;"
-        t = env.from_string("{{ foo }}")
-        assert t.render(foo="<foo>") == "<foo>"
-
-    def test_sandbox_max_range(self, env):
-        from jinja2.sandbox import SandboxedEnvironment, MAX_RANGE
-
-        env = SandboxedEnvironment()
-        t = env.from_string("{% for item in range(total) %}{{ item }}{% endfor %}")
-
-        with pytest.raises(OverflowError):
-            t.render(total=MAX_RANGE + 1)
-
-
-class TestMeta:
+            return name.endswith(".html") 
+
+        env = Environment( 
+            autoescape=select_autoescape, 
+            loader=DictLoader({"test.txt": "{{ foo }}", "test.html": "{{ foo }}"}), 
+        ) 
+        t = env.get_template("test.txt") 
+        assert t.render(foo="<foo>") == "<foo>" 
+        t = env.get_template("test.html") 
+        assert t.render(foo="<foo>") == "&lt;foo&gt;" 
+        t = env.from_string("{{ foo }}") 
+        assert t.render(foo="<foo>") == "<foo>" 
+
+    def test_sandbox_max_range(self, env): 
+        from jinja2.sandbox import SandboxedEnvironment, MAX_RANGE 
+ 
+        env = SandboxedEnvironment() 
+        t = env.from_string("{% for item in range(total) %}{{ item }}{% endfor %}") 
+ 
+        with pytest.raises(OverflowError): 
+            t.render(total=MAX_RANGE + 1) 
+ 
+ 
+class TestMeta: 
     def test_find_undeclared_variables(self, env):
-        ast = env.parse("{% set foo = 42 %}{{ bar + foo }}")
+        ast = env.parse("{% set foo = 42 %}{{ bar + foo }}") 
         x = meta.find_undeclared_variables(ast)
-        assert x == {"bar"}
-
-        ast = env.parse(
-            "{% set foo = 42 %}{{ bar + foo }}"
-            "{% macro meh(x) %}{{ x }}{% endmacro %}"
-            "{% for item in seq %}{{ muh(item) + meh(seq) }}"
-            "{% endfor %}"
-        )
+        assert x == {"bar"} 
+
+        ast = env.parse( 
+            "{% set foo = 42 %}{{ bar + foo }}" 
+            "{% macro meh(x) %}{{ x }}{% endmacro %}" 
+            "{% for item in seq %}{{ muh(item) + meh(seq) }}" 
+            "{% endfor %}" 
+        ) 
         x = meta.find_undeclared_variables(ast)
-        assert x == {"bar", "seq", "muh"}
-
-        ast = env.parse("{% for x in range(5) %}{{ x }}{% endfor %}{{ foo }}")
-        x = meta.find_undeclared_variables(ast)
-        assert x == {"foo"}
+        assert x == {"bar", "seq", "muh"} 
 
+        ast = env.parse("{% for x in range(5) %}{{ x }}{% endfor %}{{ foo }}") 
+        x = meta.find_undeclared_variables(ast) 
+        assert x == {"foo"} 
+ 
     def test_find_refererenced_templates(self, env):
         ast = env.parse('{% extends "layout.html" %}{% include helper %}')
         i = meta.find_referenced_templates(ast)
-        assert next(i) == "layout.html"
+        assert next(i) == "layout.html" 
         assert next(i) is None
         assert list(i) == []
 
-        ast = env.parse(
-            '{% extends "layout.html" %}'
-            '{% from "test.html" import a, b as c %}'
-            '{% import "meh.html" as meh %}'
-            '{% include "muh.html" %}'
-        )
+        ast = env.parse( 
+            '{% extends "layout.html" %}' 
+            '{% from "test.html" import a, b as c %}' 
+            '{% import "meh.html" as meh %}' 
+            '{% include "muh.html" %}' 
+        ) 
         i = meta.find_referenced_templates(ast)
-        assert list(i) == ["layout.html", "test.html", "meh.html", "muh.html"]
+        assert list(i) == ["layout.html", "test.html", "meh.html", "muh.html"] 
 
     def test_find_included_templates(self, env):
         ast = env.parse('{% include ["foo.html", "bar.html"] %}')
         i = meta.find_referenced_templates(ast)
-        assert list(i) == ["foo.html", "bar.html"]
+        assert list(i) == ["foo.html", "bar.html"] 
 
         ast = env.parse('{% include ("foo.html", "bar.html") %}')
         i = meta.find_referenced_templates(ast)
-        assert list(i) == ["foo.html", "bar.html"]
+        assert list(i) == ["foo.html", "bar.html"] 
 
         ast = env.parse('{% include ["foo.html", "bar.html", foo] %}')
         i = meta.find_referenced_templates(ast)
-        assert list(i) == ["foo.html", "bar.html", None]
+        assert list(i) == ["foo.html", "bar.html", None] 
 
         ast = env.parse('{% include ("foo.html", "bar.html", foo) %}')
         i = meta.find_referenced_templates(ast)
-        assert list(i) == ["foo.html", "bar.html", None]
+        assert list(i) == ["foo.html", "bar.html", None] 
 
 
-class TestStreaming:
+class TestStreaming: 
     def test_basic_streaming(self, env):
-        t = env.from_string(
-            "<ul>{% for item in seq %}<li>{{ loop.index }} - {{ item }}</li>"
-            "{%- endfor %}</ul>"
-        )
-        stream = t.stream(seq=list(range(3)))
-        assert next(stream) == "<ul>"
-        assert "".join(stream) == "<li>1 - 0</li><li>2 - 1</li><li>3 - 2</li></ul>"
+        t = env.from_string( 
+            "<ul>{% for item in seq %}<li>{{ loop.index }} - {{ item }}</li>" 
+            "{%- endfor %}</ul>" 
+        ) 
+        stream = t.stream(seq=list(range(3))) 
+        assert next(stream) == "<ul>" 
+        assert "".join(stream) == "<li>1 - 0</li><li>2 - 1</li><li>3 - 2</li></ul>" 
 
     def test_buffered_streaming(self, env):
-        tmpl = env.from_string(
-            "<ul>{% for item in seq %}<li>{{ loop.index }} - {{ item }}</li>"
-            "{%- endfor %}</ul>"
-        )
-        stream = tmpl.stream(seq=list(range(3)))
+        tmpl = env.from_string( 
+            "<ul>{% for item in seq %}<li>{{ loop.index }} - {{ item }}</li>" 
+            "{%- endfor %}</ul>" 
+        ) 
+        stream = tmpl.stream(seq=list(range(3))) 
         stream.enable_buffering(size=3)
-        assert next(stream) == "<ul><li>1"
-        assert next(stream) == " - 0</li>"
+        assert next(stream) == "<ul><li>1" 
+        assert next(stream) == " - 0</li>" 
 
     def test_streaming_behavior(self, env):
         tmpl = env.from_string("")
@@ -242,193 +242,193 @@ class TestStreaming:
         assert not stream.buffered
 
     def test_dump_stream(self, env):
-        tmp = Path(tempfile.mkdtemp())
+        tmp = Path(tempfile.mkdtemp()) 
         try:
-            tmpl = env.from_string("\u2713")
+            tmpl = env.from_string("\u2713") 
             stream = tmpl.stream()
-            stream.dump(str(tmp / "dump.txt"), "utf-8")
-            assert (tmp / "dump.txt").read_bytes() == b"\xe2\x9c\x93"
+            stream.dump(str(tmp / "dump.txt"), "utf-8") 
+            assert (tmp / "dump.txt").read_bytes() == b"\xe2\x9c\x93" 
         finally:
             shutil.rmtree(tmp)
 
 
-class TestUndefined:
+class TestUndefined: 
     def test_stopiteration_is_undefined(self):
         def test():
             raise StopIteration()
-
-        t = Template("A{{ test() }}B")
-        assert t.render(test=test) == "AB"
-        t = Template("A{{ test().missingattribute }}B")
+ 
+        t = Template("A{{ test() }}B") 
+        assert t.render(test=test) == "AB" 
+        t = Template("A{{ test().missingattribute }}B") 
         pytest.raises(UndefinedError, t.render, test=test)
 
     def test_undefined_and_special_attributes(self):
-        with pytest.raises(AttributeError):
-            Undefined("Foo").__dict__
-
-    def test_undefined_attribute_error(self):
-        # Django's LazyObject turns the __class__ attribute into a
-        # property that resolves the wrapped function. If that wrapped
-        # function raises an AttributeError, printing the repr of the
-        # object in the undefined message would cause a RecursionError.
-        class Error:
-            @property  # type: ignore
-            def __class__(self):
-                raise AttributeError()
-
-        u = Undefined(obj=Error(), name="hello")
-
-        with pytest.raises(UndefinedError):
-            getattr(u, "recursion", None)
-
+        with pytest.raises(AttributeError): 
+            Undefined("Foo").__dict__ 
+
+    def test_undefined_attribute_error(self): 
+        # Django's LazyObject turns the __class__ attribute into a 
+        # property that resolves the wrapped function. If that wrapped 
+        # function raises an AttributeError, printing the repr of the 
+        # object in the undefined message would cause a RecursionError. 
+        class Error: 
+            @property  # type: ignore 
+            def __class__(self): 
+                raise AttributeError() 
+ 
+        u = Undefined(obj=Error(), name="hello") 
+ 
+        with pytest.raises(UndefinedError): 
+            getattr(u, "recursion", None) 
+ 
     def test_logging_undefined(self):
         _messages = []
 
-        class DebugLogger:
+        class DebugLogger: 
             def warning(self, msg, *args):
-                _messages.append("W:" + msg % args)
+                _messages.append("W:" + msg % args) 
 
             def error(self, msg, *args):
-                _messages.append("E:" + msg % args)
+                _messages.append("E:" + msg % args) 
 
         logging_undefined = make_logging_undefined(DebugLogger())
         env = Environment(undefined=logging_undefined)
-        assert env.from_string("{{ missing }}").render() == ""
-        pytest.raises(UndefinedError, env.from_string("{{ missing.attribute }}").render)
-        assert env.from_string("{{ missing|list }}").render() == "[]"
-        assert env.from_string("{{ missing is not defined }}").render() == "True"
-        assert env.from_string("{{ foo.missing }}").render(foo=42) == ""
-        assert env.from_string("{{ not missing }}").render() == "True"
+        assert env.from_string("{{ missing }}").render() == "" 
+        pytest.raises(UndefinedError, env.from_string("{{ missing.attribute }}").render) 
+        assert env.from_string("{{ missing|list }}").render() == "[]" 
+        assert env.from_string("{{ missing is not defined }}").render() == "True" 
+        assert env.from_string("{{ foo.missing }}").render(foo=42) == "" 
+        assert env.from_string("{{ not missing }}").render() == "True" 
         assert _messages == [
-            "W:Template variable warning: 'missing' is undefined",
+            "W:Template variable warning: 'missing' is undefined", 
             "E:Template variable error: 'missing' is undefined",
-            "W:Template variable warning: 'missing' is undefined",
-            "W:Template variable warning: 'int object' has no attribute 'missing'",
-            "W:Template variable warning: 'missing' is undefined",
+            "W:Template variable warning: 'missing' is undefined", 
+            "W:Template variable warning: 'int object' has no attribute 'missing'", 
+            "W:Template variable warning: 'missing' is undefined", 
         ]
 
     def test_default_undefined(self):
         env = Environment(undefined=Undefined)
-        assert env.from_string("{{ missing }}").render() == ""
-        pytest.raises(UndefinedError, env.from_string("{{ missing.attribute }}").render)
-        assert env.from_string("{{ missing|list }}").render() == "[]"
-        assert env.from_string("{{ missing is not defined }}").render() == "True"
-        assert env.from_string("{{ foo.missing }}").render(foo=42) == ""
-        assert env.from_string("{{ not missing }}").render() == "True"
-        pytest.raises(UndefinedError, env.from_string("{{ missing - 1}}").render)
-        assert env.from_string("{{ 'foo' in missing }}").render() == "False"
-        und1 = Undefined(name="x")
-        und2 = Undefined(name="y")
-        assert und1 == und2
-        assert und1 != 42
-        assert hash(und1) == hash(und2) == hash(Undefined())
-        with pytest.raises(AttributeError):
-            getattr(Undefined, "__slots__")  # noqa: B009
-
-    def test_chainable_undefined(self):
-        env = Environment(undefined=ChainableUndefined)
-        # The following tests are copied from test_default_undefined
-        assert env.from_string("{{ missing }}").render() == ""
-        assert env.from_string("{{ missing|list }}").render() == "[]"
-        assert env.from_string("{{ missing is not defined }}").render() == "True"
-        assert env.from_string("{{ foo.missing }}").render(foo=42) == ""
-        assert env.from_string("{{ not missing }}").render() == "True"
-        pytest.raises(UndefinedError, env.from_string("{{ missing - 1}}").render)
-        with pytest.raises(AttributeError):
-            getattr(ChainableUndefined, "__slots__")  # noqa: B009
-
-        # The following tests ensure subclass functionality works as expected
-        assert env.from_string('{{ missing.bar["baz"] }}').render() == ""
-        assert env.from_string('{{ foo.bar["baz"]._undefined_name }}').render() == "foo"
-        assert (
-            env.from_string('{{ foo.bar["baz"]._undefined_name }}').render(foo=42)
-            == "bar"
-        )
-        assert (
-            env.from_string('{{ foo.bar["baz"]._undefined_name }}').render(
-                foo={"bar": 42}
-            )
-            == "baz"
-        )
-
+        assert env.from_string("{{ missing }}").render() == "" 
+        pytest.raises(UndefinedError, env.from_string("{{ missing.attribute }}").render) 
+        assert env.from_string("{{ missing|list }}").render() == "[]" 
+        assert env.from_string("{{ missing is not defined }}").render() == "True" 
+        assert env.from_string("{{ foo.missing }}").render(foo=42) == "" 
+        assert env.from_string("{{ not missing }}").render() == "True" 
+        pytest.raises(UndefinedError, env.from_string("{{ missing - 1}}").render) 
+        assert env.from_string("{{ 'foo' in missing }}").render() == "False" 
+        und1 = Undefined(name="x") 
+        und2 = Undefined(name="y") 
+        assert und1 == und2 
+        assert und1 != 42 
+        assert hash(und1) == hash(und2) == hash(Undefined()) 
+        with pytest.raises(AttributeError): 
+            getattr(Undefined, "__slots__")  # noqa: B009 
+
+    def test_chainable_undefined(self): 
+        env = Environment(undefined=ChainableUndefined) 
+        # The following tests are copied from test_default_undefined 
+        assert env.from_string("{{ missing }}").render() == "" 
+        assert env.from_string("{{ missing|list }}").render() == "[]" 
+        assert env.from_string("{{ missing is not defined }}").render() == "True" 
+        assert env.from_string("{{ foo.missing }}").render(foo=42) == "" 
+        assert env.from_string("{{ not missing }}").render() == "True" 
+        pytest.raises(UndefinedError, env.from_string("{{ missing - 1}}").render) 
+        with pytest.raises(AttributeError): 
+            getattr(ChainableUndefined, "__slots__")  # noqa: B009 
+ 
+        # The following tests ensure subclass functionality works as expected 
+        assert env.from_string('{{ missing.bar["baz"] }}').render() == "" 
+        assert env.from_string('{{ foo.bar["baz"]._undefined_name }}').render() == "foo" 
+        assert ( 
+            env.from_string('{{ foo.bar["baz"]._undefined_name }}').render(foo=42) 
+            == "bar" 
+        ) 
+        assert ( 
+            env.from_string('{{ foo.bar["baz"]._undefined_name }}').render( 
+                foo={"bar": 42} 
+            ) 
+            == "baz" 
+        ) 
+ 
     def test_debug_undefined(self):
         env = Environment(undefined=DebugUndefined)
-        assert env.from_string("{{ missing }}").render() == "{{ missing }}"
-        pytest.raises(UndefinedError, env.from_string("{{ missing.attribute }}").render)
-        assert env.from_string("{{ missing|list }}").render() == "[]"
-        assert env.from_string("{{ missing is not defined }}").render() == "True"
-        assert (
-            env.from_string("{{ foo.missing }}").render(foo=42)
-            == "{{ no such element: int object['missing'] }}"
-        )
-        assert env.from_string("{{ not missing }}").render() == "True"
-        undefined_hint = "this is testing undefined hint of DebugUndefined"
-        assert (
-            str(DebugUndefined(hint=undefined_hint))
-            == f"{{{{ undefined value printed: {undefined_hint} }}}}"
-        )
-        with pytest.raises(AttributeError):
-            getattr(DebugUndefined, "__slots__")  # noqa: B009
+        assert env.from_string("{{ missing }}").render() == "{{ missing }}" 
+        pytest.raises(UndefinedError, env.from_string("{{ missing.attribute }}").render) 
+        assert env.from_string("{{ missing|list }}").render() == "[]" 
+        assert env.from_string("{{ missing is not defined }}").render() == "True" 
+        assert ( 
+            env.from_string("{{ foo.missing }}").render(foo=42) 
+            == "{{ no such element: int object['missing'] }}" 
+        ) 
+        assert env.from_string("{{ not missing }}").render() == "True" 
+        undefined_hint = "this is testing undefined hint of DebugUndefined" 
+        assert ( 
+            str(DebugUndefined(hint=undefined_hint)) 
+            == f"{{{{ undefined value printed: {undefined_hint} }}}}" 
+        ) 
+        with pytest.raises(AttributeError): 
+            getattr(DebugUndefined, "__slots__")  # noqa: B009 
 
     def test_strict_undefined(self):
         env = Environment(undefined=StrictUndefined)
-        pytest.raises(UndefinedError, env.from_string("{{ missing }}").render)
-        pytest.raises(UndefinedError, env.from_string("{{ missing.attribute }}").render)
-        pytest.raises(UndefinedError, env.from_string("{{ missing|list }}").render)
-        pytest.raises(UndefinedError, env.from_string("{{ 'foo' in missing }}").render)
-        assert env.from_string("{{ missing is not defined }}").render() == "True"
-        pytest.raises(
-            UndefinedError, env.from_string("{{ foo.missing }}").render, foo=42
-        )
-        pytest.raises(UndefinedError, env.from_string("{{ not missing }}").render)
-        assert (
-            env.from_string('{{ missing|default("default", true) }}').render()
-            == "default"
-        )
-        with pytest.raises(AttributeError):
-            getattr(StrictUndefined, "__slots__")  # noqa: B009
-        assert env.from_string('{{ "foo" if false }}').render() == ""
+        pytest.raises(UndefinedError, env.from_string("{{ missing }}").render) 
+        pytest.raises(UndefinedError, env.from_string("{{ missing.attribute }}").render) 
+        pytest.raises(UndefinedError, env.from_string("{{ missing|list }}").render) 
+        pytest.raises(UndefinedError, env.from_string("{{ 'foo' in missing }}").render) 
+        assert env.from_string("{{ missing is not defined }}").render() == "True" 
+        pytest.raises( 
+            UndefinedError, env.from_string("{{ foo.missing }}").render, foo=42 
+        ) 
+        pytest.raises(UndefinedError, env.from_string("{{ not missing }}").render) 
+        assert ( 
+            env.from_string('{{ missing|default("default", true) }}').render() 
+            == "default" 
+        ) 
+        with pytest.raises(AttributeError): 
+            getattr(StrictUndefined, "__slots__")  # noqa: B009 
+        assert env.from_string('{{ "foo" if false }}').render() == "" 
 
     def test_indexing_gives_undefined(self):
         t = Template("{{ var[42].foo }}")
         pytest.raises(UndefinedError, t.render, var=0)
 
     def test_none_gives_proper_error(self):
-        with pytest.raises(UndefinedError, match="'None' has no attribute 'split'"):
-            Environment().getattr(None, "split")()
+        with pytest.raises(UndefinedError, match="'None' has no attribute 'split'"): 
+            Environment().getattr(None, "split")() 
 
     def test_object_repr(self):
-        with pytest.raises(
-            UndefinedError, match="'int object' has no attribute 'upper'"
-        ):
-            Undefined(obj=42, name="upper")()
+        with pytest.raises( 
+            UndefinedError, match="'int object' has no attribute 'upper'" 
+        ): 
+            Undefined(obj=42, name="upper")() 
 
 
-class TestLowLevel:
+class TestLowLevel: 
     def test_custom_code_generator(self):
         class CustomCodeGenerator(CodeGenerator):
             def visit_Const(self, node, frame=None):
                 # This method is pure nonsense, but works fine for testing...
-                if node.value == "foo":
-                    self.write(repr("bar"))
+                if node.value == "foo": 
+                    self.write(repr("bar")) 
                 else:
-                    super().visit_Const(node, frame)
+                    super().visit_Const(node, frame) 
 
         class CustomEnvironment(Environment):
             code_generator_class = CustomCodeGenerator
 
         env = CustomEnvironment()
         tmpl = env.from_string('{% set foo = "foo" %}{{ foo }}')
-        assert tmpl.render() == "bar"
+        assert tmpl.render() == "bar" 
 
     def test_custom_context(self):
         class CustomContext(Context):
             def resolve_or_missing(self, key):
-                return "resolve-" + key
+                return "resolve-" + key 
 
         class CustomEnvironment(Environment):
             context_class = CustomContext
 
         env = CustomEnvironment()
-        tmpl = env.from_string("{{ foo }}")
-        assert tmpl.render() == "resolve-foo"
+        tmpl = env.from_string("{{ foo }}") 
+        assert tmpl.render() == "resolve-foo"