jinja2/tests/test_filters.py

import random
from collections import namedtuple

import pytest
from markupsafe import Markup

from jinja2 import Environment
from jinja2 import StrictUndefined
from jinja2 import TemplateRuntimeError
from jinja2 import UndefinedError
from jinja2.exceptions import TemplateAssertionError


class Magic:
    def __init__(self, value):
        self.value = value

    def __str__(self):
        return str(self.value)


class Magic2:
    def __init__(self, value1, value2):
        self.value1 = value1
        self.value2 = value2

    def __str__(self):
        return f"({self.value1},{self.value2})"


class TestFilter:
    def test_filter_calling(self, env):
        rv = env.call_filter("sum", [1, 2, 3])
        assert rv == 6

    def test_capitalize(self, env):
        tmpl = env.from_string('{{ "foo bar"|capitalize }}')
        assert tmpl.render() == "Foo bar"

    def test_center(self, env):
        tmpl = env.from_string('{{ "foo"|center(9) }}')
        assert tmpl.render() == "   foo   "

    def test_default(self, env):
        tmpl = env.from_string(
            "{{ missing|default('no') }}|{{ false|default('no') }}|"
            "{{ false|default('no', true) }}|{{ given|default('no') }}"
        )
        assert tmpl.render(given="yes") == "no|False|no|yes"

    @pytest.mark.parametrize(
        "args,expect",
        (
            ("", "[('aa', 0), ('AB', 3), ('b', 1), ('c', 2)]"),
            ("true", "[('AB', 3), ('aa', 0), ('b', 1), ('c', 2)]"),
            ('by="value"', "[('aa', 0), ('b', 1), ('c', 2), ('AB', 3)]"),
            ("reverse=true", "[('c', 2), ('b', 1), ('AB', 3), ('aa', 0)]"),
        ),
    )
    def test_dictsort(self, env, args, expect):
        t = env.from_string(f"{{{{ foo|dictsort({args}) }}}}")
        out = t.render(foo={"aa": 0, "b": 1, "c": 2, "AB": 3})
        assert out == expect

    def test_batch(self, env):
        tmpl = env.from_string("{{ foo|batch(3)|list }}|{{ foo|batch(3, 'X')|list }}")
        out = tmpl.render(foo=list(range(10)))
        assert out == (
            "[[0, 1, 2], [3, 4, 5], [6, 7, 8], [9]]|"
            "[[0, 1, 2], [3, 4, 5], [6, 7, 8], [9, 'X', 'X']]"
        )

    def test_slice(self, env):
        tmpl = env.from_string("{{ foo|slice(3)|list }}|{{ foo|slice(3, 'X')|list }}")
        out = tmpl.render(foo=list(range(10)))
        assert out == (
            "[[0, 1, 2, 3], [4, 5, 6], [7, 8, 9]]|"
            "[[0, 1, 2, 3], [4, 5, 6, 'X'], [7, 8, 9, 'X']]"
        )

    def test_escape(self, env):
        tmpl = env.from_string("""{{ '<">&'|escape }}""")
        out = tmpl.render()
        assert out == "&lt;&#34;&gt;&amp;"

    @pytest.mark.parametrize(
        ("chars", "expect"), [(None, "..stays.."), (".", "  ..stays"), (" .", "stays")]
    )
    def test_trim(self, env, chars, expect):
        tmpl = env.from_string("{{ foo|trim(chars) }}")
        out = tmpl.render(foo="  ..stays..", chars=chars)
        assert out == expect

    def test_striptags(self, env):
        tmpl = env.from_string("""{{ foo|striptags }}""")
        out = tmpl.render(
            foo='  <p>just a small   \n <a href="#">'
            "example</a> link</p>\n<p>to a webpage</p> "
            "<!-- <p>and some commented stuff</p> -->"
        )
        assert out == "just a small example link to a webpage"

    def test_filesizeformat(self, env):
        tmpl = env.from_string(
            "{{ 100|filesizeformat }}|"
            "{{ 1000|filesizeformat }}|"
            "{{ 1000000|filesizeformat }}|"
            "{{ 1000000000|filesizeformat }}|"
            "{{ 1000000000000|filesizeformat }}|"
            "{{ 100|filesizeformat(true) }}|"
            "{{ 1000|filesizeformat(true) }}|"
            "{{ 1000000|filesizeformat(true) }}|"
            "{{ 1000000000|filesizeformat(true) }}|"
            "{{ 1000000000000|filesizeformat(true) }}"
        )
        out = tmpl.render()
        assert out == (
            "100 Bytes|1.0 kB|1.0 MB|1.0 GB|1.0 TB|100 Bytes|"
            "1000 Bytes|976.6 KiB|953.7 MiB|931.3 GiB"
        )

    def test_filesizeformat_issue59(self, env):
        tmpl = env.from_string(
            "{{ 300|filesizeformat }}|"
            "{{ 3000|filesizeformat }}|"
            "{{ 3000000|filesizeformat }}|"
            "{{ 3000000000|filesizeformat }}|"
            "{{ 3000000000000|filesizeformat }}|"
            "{{ 300|filesizeformat(true) }}|"
            "{{ 3000|filesizeformat(true) }}|"
            "{{ 3000000|filesizeformat(true) }}"
        )
        out = tmpl.render()
        assert out == (
            "300 Bytes|3.0 kB|3.0 MB|3.0 GB|3.0 TB|300 Bytes|2.9 KiB|2.9 MiB"
        )

    def test_first(self, env):
        tmpl = env.from_string("{{ foo|first }}")
        out = tmpl.render(foo=list(range(10)))
        assert out == "0"

    @pytest.mark.parametrize(
        ("value", "expect"), (("42", "42.0"), ("abc", "0.0"), ("32.32", "32.32"))
    )
    def test_float(self, env, value, expect):
        t = env.from_string("{{ value|float }}")
        assert t.render(value=value) == expect

    def test_float_default(self, env):
        t = env.from_string("{{ value|float(default=1.0) }}")
        assert t.render(value="abc") == "1.0"

    def test_format(self, env):
        tmpl = env.from_string("{{ '%s|%s'|format('a', 'b') }}")
        out = tmpl.render()
        assert out == "a|b"

    @staticmethod
    def _test_indent_multiline_template(env, markup=False):
        text = "\n".join(["", "foo bar", '"baz"', ""])
        if markup:
            text = Markup(text)
        t = env.from_string("{{ foo|indent(2, false, false) }}")
        assert t.render(foo=text) == '\n  foo bar\n  "baz"\n'
        t = env.from_string("{{ foo|indent(2, false, true) }}")
        assert t.render(foo=text) == '\n  foo bar\n  "baz"\n  '
        t = env.from_string("{{ foo|indent(2, true, false) }}")
        assert t.render(foo=text) == '  \n  foo bar\n  "baz"\n'
        t = env.from_string("{{ foo|indent(2, true, true) }}")
        assert t.render(foo=text) == '  \n  foo bar\n  "baz"\n  '

    def test_indent(self, env):
        self._test_indent_multiline_template(env)
        t = env.from_string('{{ "jinja"|indent }}')
        assert t.render() == "jinja"
        t = env.from_string('{{ "jinja"|indent(first=true) }}')
        assert t.render() == "    jinja"
        t = env.from_string('{{ "jinja"|indent(blank=true) }}')
        assert t.render() == "jinja"

    def test_indent_markup_input(self, env):
        """
        Tests cases where the filter input is a Markup type
        """
        self._test_indent_multiline_template(env, markup=True)

    def test_indent_width_string(self, env):
        t = env.from_string("{{ 'jinja\nflask'|indent(width='>>> ', first=True) }}")
        assert t.render() == ">>> jinja\n>>> flask"

    @pytest.mark.parametrize(
        ("value", "expect"),
        (
            ("42", "42"),
            ("abc", "0"),
            ("32.32", "32"),
            ("12345678901234567890", "12345678901234567890"),
        ),
    )
    def test_int(self, env, value, expect):
        t = env.from_string("{{ value|int }}")
        assert t.render(value=value) == expect

    @pytest.mark.parametrize(
        ("value", "base", "expect"),
        (("0x4d32", 16, "19762"), ("011", 8, "9"), ("0x33Z", 16, "0")),
    )
    def test_int_base(self, env, value, base, expect):
        t = env.from_string("{{ value|int(base=base) }}")
        assert t.render(value=value, base=base) == expect

    def test_int_default(self, env):
        t = env.from_string("{{ value|int(default=1) }}")
        assert t.render(value="abc") == "1"

    def test_int_special_method(self, env):
        class IntIsh:
            def __int__(self):
                return 42

        t = env.from_string("{{ value|int }}")
        assert t.render(value=IntIsh()) == "42"

    def test_join(self, env):
        tmpl = env.from_string('{{ [1, 2, 3]|join("|") }}')
        out = tmpl.render()
        assert out == "1|2|3"

        env2 = Environment(autoescape=True)
        tmpl = env2.from_string('{{ ["<foo>", "<span>foo</span>"|safe]|join }}')
        assert tmpl.render() == "&lt;foo&gt;<span>foo</span>"

    def test_join_attribute(self, env):
        User = namedtuple("User", "username")
        tmpl = env.from_string("""{{ users|join(', ', 'username') }}""")
        assert tmpl.render(users=map(User, ["foo", "bar"])) == "foo, bar"

    def test_last(self, env):
        tmpl = env.from_string("""{{ foo|last }}""")
        out = tmpl.render(foo=list(range(10)))
        assert out == "9"

    def test_length(self, env):
        tmpl = env.from_string("""{{ "hello world"|length }}""")
        out = tmpl.render()
        assert out == "11"

    def test_lower(self, env):
        tmpl = env.from_string("""{{ "FOO"|lower }}""")
        out = tmpl.render()
        assert out == "foo"

    def test_items(self, env):
        d = {i: c for i, c in enumerate("abc")}
        tmpl = env.from_string("""{{ d|items|list }}""")
        out = tmpl.render(d=d)
        assert out == "[(0, 'a'), (1, 'b'), (2, 'c')]"

    def test_items_undefined(self, env):
        tmpl = env.from_string("""{{ d|items|list }}""")
        out = tmpl.render()
        assert out == "[]"

    def test_pprint(self, env):
        from pprint import pformat

        tmpl = env.from_string("""{{ data|pprint }}""")
        data = list(range(1000))
        assert tmpl.render(data=data) == pformat(data)

    def test_random(self, env, request):
        # restore the random state when the test ends
        state = random.getstate()
        request.addfinalizer(lambda: random.setstate(state))
        # generate the random values from a known seed
        random.seed("jinja")
        expected = [random.choice("1234567890") for _ in range(10)]

        # check that the random sequence is generated again by a template
        # ensures that filter result is not constant folded
        random.seed("jinja")
        t = env.from_string('{{ "1234567890"|random }}')

        for value in expected:
            assert t.render() == value

    def test_reverse(self, env):
        tmpl = env.from_string(
            "{{ 'foobar'|reverse|join }}|{{ [1, 2, 3]|reverse|list }}"
        )
        assert tmpl.render() == "raboof|[3, 2, 1]"

    def test_string(self, env):
        x = [1, 2, 3, 4, 5]
        tmpl = env.from_string("""{{ obj|string }}""")
        assert tmpl.render(obj=x) == str(x)

    def test_title(self, env):
        tmpl = env.from_string("""{{ "foo bar"|title }}""")
        assert tmpl.render() == "Foo Bar"
        tmpl = env.from_string("""{{ "foo's bar"|title }}""")
        assert tmpl.render() == "Foo's Bar"
        tmpl = env.from_string("""{{ "foo   bar"|title }}""")
        assert tmpl.render() == "Foo   Bar"
        tmpl = env.from_string("""{{ "f bar f"|title }}""")
        assert tmpl.render() == "F Bar F"
        tmpl = env.from_string("""{{ "foo-bar"|title }}""")
        assert tmpl.render() == "Foo-Bar"
        tmpl = env.from_string("""{{ "foo\tbar"|title }}""")
        assert tmpl.render() == "Foo\tBar"
        tmpl = env.from_string("""{{ "FOO\tBAR"|title }}""")
        assert tmpl.render() == "Foo\tBar"
        tmpl = env.from_string("""{{ "foo (bar)"|title }}""")
        assert tmpl.render() == "Foo (Bar)"
        tmpl = env.from_string("""{{ "foo {bar}"|title }}""")
        assert tmpl.render() == "Foo {Bar}"
        tmpl = env.from_string("""{{ "foo [bar]"|title }}""")
        assert tmpl.render() == "Foo [Bar]"
        tmpl = env.from_string("""{{ "foo <bar>"|title }}""")
        assert tmpl.render() == "Foo <Bar>"

        class Foo:
            def __str__(self):
                return "foo-bar"

        tmpl = env.from_string("""{{ data|title }}""")
        out = tmpl.render(data=Foo())
        assert out == "Foo-Bar"

    def test_truncate(self, env):
        tmpl = env.from_string(
            '{{ data|truncate(15, true, ">>>") }}|'
            '{{ data|truncate(15, false, ">>>") }}|'
            "{{ smalldata|truncate(15) }}"
        )
        out = tmpl.render(data="foobar baz bar" * 1000, smalldata="foobar baz bar")
        assert out == "foobar baz b>>>|foobar baz>>>|foobar baz bar"

    def test_truncate_very_short(self, env):
        tmpl = env.from_string(
            '{{ "foo bar baz"|truncate(9) }}|{{ "foo bar baz"|truncate(9, true) }}'
        )
        out = tmpl.render()
        assert out == "foo bar baz|foo bar baz"

    def test_truncate_end_length(self, env):
        tmpl = env.from_string('{{ "Joel is a slug"|truncate(7, true) }}')
        out = tmpl.render()
        assert out == "Joel..."

    def test_upper(self, env):
        tmpl = env.from_string('{{ "foo"|upper }}')
        assert tmpl.render() == "FOO"

    def test_urlize(self, env):
        tmpl = env.from_string('{{ "foo example.org bar"|urlize }}')
        assert tmpl.render() == (
            'foo <a href="https://example.org" rel="noopener">' "example.org</a> bar"
        )
        tmpl = env.from_string('{{ "foo http://www.example.com/ bar"|urlize }}')
        assert tmpl.render() == (
            'foo <a href="http://www.example.com/" rel="noopener">'
            "http://www.example.com/</a> bar"
        )
        tmpl = env.from_string('{{ "foo mailto:email@example.com bar"|urlize }}')
        assert tmpl.render() == (
            'foo <a href="mailto:email@example.com">email@example.com</a> bar'
        )
        tmpl = env.from_string('{{ "foo email@example.com bar"|urlize }}')
        assert tmpl.render() == (
            'foo <a href="mailto:email@example.com">email@example.com</a> bar'
        )

    def test_urlize_rel_policy(self):
        env = Environment()
        env.policies["urlize.rel"] = None
        tmpl = env.from_string('{{ "foo http://www.example.com/ bar"|urlize }}')
        assert tmpl.render() == (
            'foo <a href="http://www.example.com/">http://www.example.com/</a> bar'
        )

    def test_urlize_target_parameter(self, env):
        tmpl = env.from_string(
            '{{ "foo http://www.example.com/ bar"|urlize(target="_blank") }}'
        )
        assert (
            tmpl.render()
            == 'foo <a href="http://www.example.com/" rel="noopener" target="_blank">'
            "http://www.example.com/</a> bar"
        )

    def test_urlize_extra_schemes_parameter(self, env):
        tmpl = env.from_string(
            '{{ "foo tel:+1-514-555-1234 ftp://localhost bar"|'
            'urlize(extra_schemes=["tel:", "ftp:"]) }}'
        )
        assert tmpl.render() == (
            'foo <a href="tel:+1-514-555-1234" rel="noopener">'
            'tel:+1-514-555-1234</a> <a href="ftp://localhost" rel="noopener">'
            "ftp://localhost</a> bar"
        )

    def test_wordcount(self, env):
        tmpl = env.from_string('{{ "foo bar baz"|wordcount }}')
        assert tmpl.render() == "3"

        strict_env = Environment(undefined=StrictUndefined)
        t = strict_env.from_string("{{ s|wordcount }}")
        with pytest.raises(UndefinedError):
            t.render()

    def test_block(self, env):
        tmpl = env.from_string("{% filter lower|escape %}<HEHE>{% endfilter %}")
        assert tmpl.render() == "&lt;hehe&gt;"

    def test_chaining(self, env):
        tmpl = env.from_string("""{{ ['<foo>', '<bar>']|first|upper|escape }}""")
        assert tmpl.render() == "&lt;FOO&gt;"

    def test_sum(self, env):
        tmpl = env.from_string("""{{ [1, 2, 3, 4, 5, 6]|sum }}""")
        assert tmpl.render() == "21"

    def test_sum_attributes(self, env):
        tmpl = env.from_string("""{{ values|sum('value') }}""")
        assert tmpl.render(values=[{"value": 23}, {"value": 1}, {"value": 18}]) == "42"

    def test_sum_attributes_nested(self, env):
        tmpl = env.from_string("""{{ values|sum('real.value') }}""")
        assert (
            tmpl.render(
                values=[
                    {"real": {"value": 23}},
                    {"real": {"value": 1}},
                    {"real": {"value": 18}},
                ]
            )
            == "42"
        )

    def test_sum_attributes_tuple(self, env):
        tmpl = env.from_string("""{{ values.items()|sum('1') }}""")
        assert tmpl.render(values={"foo": 23, "bar": 1, "baz": 18}) == "42"

    def test_abs(self, env):
        tmpl = env.from_string("""{{ -1|abs }}|{{ 1|abs }}""")
        assert tmpl.render() == "1|1", tmpl.render()

    def test_round_positive(self, env):
        tmpl = env.from_string(
            "{{ 2.7|round }}|{{ 2.1|round }}|"
            "{{ 2.1234|round(3, 'floor') }}|"
            "{{ 2.1|round(0, 'ceil') }}"
        )
        assert tmpl.render() == "3.0|2.0|2.123|3.0", tmpl.render()

    def test_round_negative(self, env):
        tmpl = env.from_string(
            "{{ 21.3|round(-1)}}|"
            "{{ 21.3|round(-1, 'ceil')}}|"
            "{{ 21.3|round(-1, 'floor')}}"
        )
        assert tmpl.render() == "20.0|30.0|20.0", tmpl.render()

    def test_xmlattr(self, env):
        tmpl = env.from_string(
            "{{ {'foo': 42, 'bar': 23, 'fish': none, "
            "'spam': missing, 'blub:blub': '<?>'}|xmlattr }}"
        )
        out = tmpl.render().split()
        assert len(out) == 3
        assert 'foo="42"' in out
        assert 'bar="23"' in out
        assert 'blub:blub="&lt;?&gt;"' in out

    def test_sort1(self, env):
        tmpl = env.from_string("{{ [2, 3, 1]|sort }}|{{ [2, 3, 1]|sort(true) }}")
        assert tmpl.render() == "[1, 2, 3]|[3, 2, 1]"

    def test_sort2(self, env):
        tmpl = env.from_string('{{ "".join(["c", "A", "b", "D"]|sort) }}')
        assert tmpl.render() == "AbcD"

    def test_sort3(self, env):
        tmpl = env.from_string("""{{ ['foo', 'Bar', 'blah']|sort }}""")
        assert tmpl.render() == "['Bar', 'blah', 'foo']"

    def test_sort4(self, env):
        tmpl = env.from_string("""{{ items|sort(attribute='value')|join }}""")
        assert tmpl.render(items=map(Magic, [3, 2, 4, 1])) == "1234"

    def test_sort5(self, env):
        tmpl = env.from_string("""{{ items|sort(attribute='value.0')|join }}""")
        assert tmpl.render(items=map(Magic, [[3], [2], [4], [1]])) == "[1][2][3][4]"

    def test_sort6(self, env):
        tmpl = env.from_string("""{{ items|sort(attribute='value1,value2')|join }}""")
        assert (
            tmpl.render(
                items=map(
                    lambda x: Magic2(x[0], x[1]), [(3, 1), (2, 2), (2, 1), (2, 5)]
                )
            )
            == "(2,1)(2,2)(2,5)(3,1)"
        )

    def test_sort7(self, env):
        tmpl = env.from_string("""{{ items|sort(attribute='value2,value1')|join }}""")
        assert (
            tmpl.render(
                items=map(
                    lambda x: Magic2(x[0], x[1]), [(3, 1), (2, 2), (2, 1), (2, 5)]
                )
            )
            == "(2,1)(3,1)(2,2)(2,5)"
        )

    def test_sort8(self, env):
        tmpl = env.from_string(
            """{{ items|sort(attribute='value1.0,value2.0')|join }}"""
        )
        assert (
            tmpl.render(
                items=map(
                    lambda x: Magic2(x[0], x[1]),
                    [([3], [1]), ([2], [2]), ([2], [1]), ([2], [5])],
                )
            )
            == "([2],[1])([2],[2])([2],[5])([3],[1])"
        )

    def test_unique(self, env):
        t = env.from_string('{{ "".join(["b", "A", "a", "b"]|unique) }}')
        assert t.render() == "bA"

    def test_unique_case_sensitive(self, env):
        t = env.from_string('{{ "".join(["b", "A", "a", "b"]|unique(true)) }}')
        assert t.render() == "bAa"

    def test_unique_attribute(self, env):
        t = env.from_string("{{ items|unique(attribute='value')|join }}")
        assert t.render(items=map(Magic, [3, 2, 4, 1, 2])) == "3241"

    @pytest.mark.parametrize(
        "source,expect",
        (
            ('{{ ["a", "B"]|min }}', "a"),
            ('{{ ["a", "B"]|min(case_sensitive=true) }}', "B"),
            ("{{ []|min }}", ""),
            ('{{ ["a", "B"]|max }}', "B"),
            ('{{ ["a", "B"]|max(case_sensitive=true) }}', "a"),
            ("{{ []|max }}", ""),
        ),
    )
    def test_min_max(self, env, source, expect):
        t = env.from_string(source)
        assert t.render() == expect

    @pytest.mark.parametrize(("name", "expect"), [("min", "1"), ("max", "9")])
    def test_min_max_attribute(self, env, name, expect):
        t = env.from_string("{{ items|" + name + '(attribute="value") }}')
        assert t.render(items=map(Magic, [5, 1, 9])) == expect

    def test_groupby(self, env):
        tmpl = env.from_string(
            """
        {%- for grouper, list in [{'foo': 1, 'bar': 2},
                                  {'foo': 2, 'bar': 3},
                                  {'foo': 1, 'bar': 1},
                                  {'foo': 3, 'bar': 4}]|groupby('foo') -%}
            {{ grouper }}{% for x in list %}: {{ x.foo }}, {{ x.bar }}{% endfor %}|
        {%- endfor %}"""
        )
        assert tmpl.render().split("|") == ["1: 1, 2: 1, 1", "2: 2, 3", "3: 3, 4", ""]

    def test_groupby_tuple_index(self, env):
        tmpl = env.from_string(
            """
        {%- for grouper, list in [('a', 1), ('a', 2), ('b', 1)]|groupby(0) -%}
            {{ grouper }}{% for x in list %}:{{ x.1 }}{% endfor %}|
        {%- endfor %}"""
        )
        assert tmpl.render() == "a:1:2|b:1|"

    def test_groupby_multidot(self, env):
        Date = namedtuple("Date", "day,month,year")
        Article = namedtuple("Article", "title,date")
        articles = [
            Article("aha", Date(1, 1, 1970)),
            Article("interesting", Date(2, 1, 1970)),
            Article("really?", Date(3, 1, 1970)),
            Article("totally not", Date(1, 1, 1971)),
        ]
        tmpl = env.from_string(
            """
        {%- for year, list in articles|groupby('date.year') -%}
            {{ year }}{% for x in list %}[{{ x.title }}]{% endfor %}|
        {%- endfor %}"""
        )
        assert tmpl.render(articles=articles).split("|") == [
            "1970[aha][interesting][really?]",
            "1971[totally not]",
            "",
        ]

    def test_groupby_default(self, env):
        tmpl = env.from_string(
            "{% for city, items in users|groupby('city', default='NY') %}"
            "{{ city }}: {{ items|map(attribute='name')|join(', ') }}\n"
            "{% endfor %}"
        )
        out = tmpl.render(
            users=[
                {"name": "emma", "city": "NY"},
                {"name": "smith", "city": "WA"},
                {"name": "john"},
            ]
        )
        assert out == "NY: emma, john\nWA: smith\n"

    @pytest.mark.parametrize(
        ("case_sensitive", "expect"),
        [
            (False, "a: 1, 3\nb: 2\n"),
            (True, "A: 3\na: 1\nb: 2\n"),
        ],
    )
    def test_groupby_case(self, env, case_sensitive, expect):
        tmpl = env.from_string(
            "{% for k, vs in data|groupby('k', case_sensitive=cs) %}"
            "{{ k }}: {{ vs|join(', ', attribute='v') }}\n"
            "{% endfor %}"
        )
        out = tmpl.render(
            data=[{"k": "a", "v": 1}, {"k": "b", "v": 2}, {"k": "A", "v": 3}],
            cs=case_sensitive,
        )
        assert out == expect

    def test_filtertag(self, env):
        tmpl = env.from_string(
            "{% filter upper|replace('FOO', 'foo') %}foobar{% endfilter %}"
        )
        assert tmpl.render() == "fooBAR"

    def test_replace(self, env):
        env = Environment()
        tmpl = env.from_string('{{ string|replace("o", 42) }}')
        assert tmpl.render(string="<foo>") == "<f4242>"
        env = Environment(autoescape=True)
        tmpl = env.from_string('{{ string|replace("o", 42) }}')
        assert tmpl.render(string="<foo>") == "&lt;f4242&gt;"
        tmpl = env.from_string('{{ string|replace("<", 42) }}')
        assert tmpl.render(string="<foo>") == "42foo&gt;"
        tmpl = env.from_string('{{ string|replace("o", ">x<") }}')
        assert tmpl.render(string=Markup("foo")) == "f&gt;x&lt;&gt;x&lt;"

    def test_forceescape(self, env):
        tmpl = env.from_string("{{ x|forceescape }}")
        assert tmpl.render(x=Markup("<div />")) == "&lt;div /&gt;"

    def test_safe(self, env):
        env = Environment(autoescape=True)
        tmpl = env.from_string('{{ "<div>foo</div>"|safe }}')
        assert tmpl.render() == "<div>foo</div>"
        tmpl = env.from_string('{{ "<div>foo</div>" }}')
        assert tmpl.render() == "&lt;div&gt;foo&lt;/div&gt;"

    @pytest.mark.parametrize(
        ("value", "expect"),
        [
            ("Hello, world!", "Hello%2C%20world%21"),
            ("Hello, world\u203d", "Hello%2C%20world%E2%80%BD"),
            ({"f": 1}, "f=1"),
            ([("f", 1), ("z", 2)], "f=1&amp;z=2"),
            ({"\u203d": 1}, "%E2%80%BD=1"),
            ({0: 1}, "0=1"),
            ([("a b/c", "a b/c")], "a+b%2Fc=a+b%2Fc"),
            ("a b/c", "a%20b/c"),
        ],
    )
    def test_urlencode(self, value, expect):
        e = Environment(autoescape=True)
        t = e.from_string("{{ value|urlencode }}")
        assert t.render(value=value) == expect

    def test_simple_map(self, env):
        env = Environment()
        tmpl = env.from_string('{{ ["1", "2", "3"]|map("int")|sum }}')
        assert tmpl.render() == "6"

    def test_map_sum(self, env):
        tmpl = env.from_string('{{ [[1,2], [3], [4,5,6]]|map("sum")|list }}')
        assert tmpl.render() == "[3, 3, 15]"

    def test_attribute_map(self, env):
        User = namedtuple("User", "name")
        env = Environment()
        users = [
            User("john"),
            User("jane"),
            User("mike"),
        ]
        tmpl = env.from_string('{{ users|map(attribute="name")|join("|") }}')
        assert tmpl.render(users=users) == "john|jane|mike"

    def test_empty_map(self, env):
        env = Environment()
        tmpl = env.from_string('{{ none|map("upper")|list }}')
        assert tmpl.render() == "[]"

    def test_map_default(self, env):
        Fullname = namedtuple("Fullname", "firstname,lastname")
        Firstname = namedtuple("Firstname", "firstname")
        env = Environment()
        tmpl = env.from_string(
            '{{ users|map(attribute="lastname", default="smith")|join(", ") }}'
        )
        test_list = env.from_string(
            '{{ users|map(attribute="lastname", default=["smith","x"])|join(", ") }}'
        )
        test_str = env.from_string(
            '{{ users|map(attribute="lastname", default="")|join(", ") }}'
        )
        users = [
            Fullname("john", "lennon"),
            Fullname("jane", "edwards"),
            Fullname("jon", None),
            Firstname("mike"),
        ]
        assert tmpl.render(users=users) == "lennon, edwards, None, smith"
        assert test_list.render(users=users) == "lennon, edwards, None, ['smith', 'x']"
        assert test_str.render(users=users) == "lennon, edwards, None, "

    def test_simple_select(self, env):
        env = Environment()
        tmpl = env.from_string('{{ [1, 2, 3, 4, 5]|select("odd")|join("|") }}')
        assert tmpl.render() == "1|3|5"

    def test_bool_select(self, env):
        env = Environment()
        tmpl = env.from_string('{{ [none, false, 0, 1, 2, 3, 4, 5]|select|join("|") }}')
        assert tmpl.render() == "1|2|3|4|5"

    def test_simple_reject(self, env):
        env = Environment()
        tmpl = env.from_string('{{ [1, 2, 3, 4, 5]|reject("odd")|join("|") }}')
        assert tmpl.render() == "2|4"

    def test_bool_reject(self, env):
        env = Environment()
        tmpl = env.from_string('{{ [none, false, 0, 1, 2, 3, 4, 5]|reject|join("|") }}')
        assert tmpl.render() == "None|False|0"

    def test_simple_select_attr(self, env):
        User = namedtuple("User", "name,is_active")
        env = Environment()
        users = [
            User("john", True),
            User("jane", True),
            User("mike", False),
        ]
        tmpl = env.from_string(
            '{{ users|selectattr("is_active")|map(attribute="name")|join("|") }}'
        )
        assert tmpl.render(users=users) == "john|jane"

    def test_simple_reject_attr(self, env):
        User = namedtuple("User", "name,is_active")
        env = Environment()
        users = [
            User("john", True),
            User("jane", True),
            User("mike", False),
        ]
        tmpl = env.from_string(
            '{{ users|rejectattr("is_active")|map(attribute="name")|join("|") }}'
        )
        assert tmpl.render(users=users) == "mike"

    def test_func_select_attr(self, env):
        User = namedtuple("User", "id,name")
        env = Environment()
        users = [
            User(1, "john"),
            User(2, "jane"),
            User(3, "mike"),
        ]
        tmpl = env.from_string(
            '{{ users|selectattr("id", "odd")|map(attribute="name")|join("|") }}'
        )
        assert tmpl.render(users=users) == "john|mike"

    def test_func_reject_attr(self, env):
        User = namedtuple("User", "id,name")
        env = Environment()
        users = [
            User(1, "john"),
            User(2, "jane"),
            User(3, "mike"),
        ]
        tmpl = env.from_string(
            '{{ users|rejectattr("id", "odd")|map(attribute="name")|join("|") }}'
        )
        assert tmpl.render(users=users) == "jane"

    def test_json_dump(self):
        env = Environment(autoescape=True)
        t = env.from_string("{{ x|tojson }}")
        assert t.render(x={"foo": "bar"}) == '{"foo": "bar"}'
        assert t.render(x="\"ba&r'") == r'"\"ba\u0026r\u0027"'
        assert t.render(x="<bar>") == r'"\u003cbar\u003e"'

        def my_dumps(value, **options):
            assert options == {"foo": "bar"}
            return "42"

        env.policies["json.dumps_function"] = my_dumps
        env.policies["json.dumps_kwargs"] = {"foo": "bar"}
        assert t.render(x=23) == "42"

    def test_wordwrap(self, env):
        env.newline_sequence = "\n"
        t = env.from_string("{{ s|wordwrap(20) }}")
        result = t.render(s="Hello!\nThis is Jinja saying something.")
        assert result == "Hello!\nThis is Jinja saying\nsomething."

    def test_filter_undefined(self, env):
        with pytest.raises(TemplateAssertionError, match="No filter named 'f'"):
            env.from_string("{{ var|f }}")

    def test_filter_undefined_in_if(self, env):
        t = env.from_string("{%- if x is defined -%}{{ x|f }}{%- else -%}x{% endif %}")
        assert t.render() == "x"
        with pytest.raises(TemplateRuntimeError, match="No filter named 'f'"):
            t.render(x=42)

    def test_filter_undefined_in_elif(self, env):
        t = env.from_string(
            "{%- if x is defined -%}{{ x }}{%- elif y is defined -%}"
            "{{ y|f }}{%- else -%}foo{%- endif -%}"
        )
        assert t.render() == "foo"
        with pytest.raises(TemplateRuntimeError, match="No filter named 'f'"):
            t.render(y=42)

    def test_filter_undefined_in_else(self, env):
        t = env.from_string(
            "{%- if x is not defined -%}foo{%- else -%}{{ x|f }}{%- endif -%}"
        )
        assert t.render() == "foo"
        with pytest.raises(TemplateRuntimeError, match="No filter named 'f'"):
            t.render(x=42)

    def test_filter_undefined_in_nested_if(self, env):
        t = env.from_string(
            "{%- if x is not defined -%}foo{%- else -%}{%- if y "
            "is defined -%}{{ y|f }}{%- endif -%}{{ x }}{%- endif -%}"
        )
        assert t.render() == "foo"
        assert t.render(x=42) == "42"
        with pytest.raises(TemplateRuntimeError, match="No filter named 'f'"):
            t.render(x=24, y=42)

    def test_filter_undefined_in_condexpr(self, env):
        t1 = env.from_string("{{ x|f if x is defined else 'foo' }}")
        t2 = env.from_string("{{ 'foo' if x is not defined else x|f }}")
        assert t1.render() == t2.render() == "foo"

        with pytest.raises(TemplateRuntimeError, match="No filter named 'f'"):
            t1.render(x=42)
            t2.render(x=42)