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from __future__ import absolute_import, division, print_function, with_statement
import os
import sys
import traceback
from tornado.escape import utf8, native_str, to_unicode
from tornado.template import Template, DictLoader, ParseError, Loader
from tornado.test.util import unittest
from tornado.util import u, ObjectDict, unicode_type
class TemplateTest(unittest.TestCase):
def test_simple(self):
template = Template("Hello {{ name }}!")
self.assertEqual(template.generate(name="Ben"),
b"Hello Ben!")
def test_bytes(self):
template = Template("Hello {{ name }}!")
self.assertEqual(template.generate(name=utf8("Ben")),
b"Hello Ben!")
def test_expressions(self):
template = Template("2 + 2 = {{ 2 + 2 }}")
self.assertEqual(template.generate(), b"2 + 2 = 4")
def test_comment(self):
template = Template("Hello{# TODO i18n #} {{ name }}!")
self.assertEqual(template.generate(name=utf8("Ben")),
b"Hello Ben!")
def test_include(self):
loader = DictLoader({
"index.html": '{% include "header.html" %}\nbody text',
"header.html": "header text",
})
self.assertEqual(loader.load("index.html").generate(),
b"header text\nbody text")
def test_extends(self):
loader = DictLoader({
"base.html": """\
<title>{% block title %}default title{% end %}</title>
<body>{% block body %}default body{% end %}</body>
""",
"page.html": """\
{% extends "base.html" %}
{% block title %}page title{% end %}
{% block body %}page body{% end %}
""",
})
self.assertEqual(loader.load("page.html").generate(),
b"<title>page title</title>\n<body>page body</body>\n")
def test_relative_load(self):
loader = DictLoader({
"a/1.html": "{% include '2.html' %}",
"a/2.html": "{% include '../b/3.html' %}",
"b/3.html": "ok",
})
self.assertEqual(loader.load("a/1.html").generate(),
b"ok")
def test_escaping(self):
self.assertRaises(ParseError, lambda: Template("{{"))
self.assertRaises(ParseError, lambda: Template("{%"))
self.assertEqual(Template("{{!").generate(), b"{{")
self.assertEqual(Template("{%!").generate(), b"{%")
self.assertEqual(Template("{{ 'expr' }} {{!jquery expr}}").generate(),
b"expr {{jquery expr}}")
def test_unicode_template(self):
template = Template(utf8(u("\u00e9")))
self.assertEqual(template.generate(), utf8(u("\u00e9")))
def test_unicode_literal_expression(self):
# Unicode literals should be usable in templates. Note that this
# test simulates unicode characters appearing directly in the
# template file (with utf8 encoding), i.e. \u escapes would not
# be used in the template file itself.
if str is unicode_type:
# python 3 needs a different version of this test since
# 2to3 doesn't run on template internals
template = Template(utf8(u('{{ "\u00e9" }}')))
else:
template = Template(utf8(u('{{ u"\u00e9" }}')))
self.assertEqual(template.generate(), utf8(u("\u00e9")))
def test_custom_namespace(self):
loader = DictLoader({"test.html": "{{ inc(5) }}"}, namespace={"inc": lambda x: x + 1})
self.assertEqual(loader.load("test.html").generate(), b"6")
def test_apply(self):
def upper(s):
return s.upper()
template = Template(utf8("{% apply upper %}foo{% end %}"))
self.assertEqual(template.generate(upper=upper), b"FOO")
def test_unicode_apply(self):
def upper(s):
return to_unicode(s).upper()
template = Template(utf8(u("{% apply upper %}foo \u00e9{% end %}")))
self.assertEqual(template.generate(upper=upper), utf8(u("FOO \u00c9")))
def test_bytes_apply(self):
def upper(s):
return utf8(to_unicode(s).upper())
template = Template(utf8(u("{% apply upper %}foo \u00e9{% end %}")))
self.assertEqual(template.generate(upper=upper), utf8(u("FOO \u00c9")))
def test_if(self):
template = Template(utf8("{% if x > 4 %}yes{% else %}no{% end %}"))
self.assertEqual(template.generate(x=5), b"yes")
self.assertEqual(template.generate(x=3), b"no")
def test_if_empty_body(self):
template = Template(utf8("{% if True %}{% else %}{% end %}"))
self.assertEqual(template.generate(), b"")
def test_try(self):
template = Template(utf8("""{% try %}
try{% set y = 1/x %}
{% except %}-except
{% else %}-else
{% finally %}-finally
{% end %}"""))
self.assertEqual(template.generate(x=1), b"\ntry\n-else\n-finally\n")
self.assertEqual(template.generate(x=0), b"\ntry-except\n-finally\n")
def test_comment_directive(self):
template = Template(utf8("{% comment blah blah %}foo"))
self.assertEqual(template.generate(), b"foo")
def test_break_continue(self):
template = Template(utf8("""\
{% for i in range(10) %}
{% if i == 2 %}
{% continue %}
{% end %}
{{ i }}
{% if i == 6 %}
{% break %}
{% end %}
{% end %}"""))
result = template.generate()
# remove extraneous whitespace
result = b''.join(result.split())
self.assertEqual(result, b"013456")
def test_break_outside_loop(self):
try:
Template(utf8("{% break %}"))
raise Exception("Did not get expected exception")
except ParseError:
pass
def test_break_in_apply(self):
# This test verifies current behavior, although of course it would
# be nice if apply didn't cause seemingly unrelated breakage
try:
Template(utf8("{% for i in [] %}{% apply foo %}{% break %}{% end %}{% end %}"))
raise Exception("Did not get expected exception")
except ParseError:
pass
@unittest.skipIf(sys.version_info >= division.getMandatoryRelease(),
'no testable future imports')
def test_no_inherit_future(self):
# This file has from __future__ import division...
self.assertEqual(1 / 2, 0.5)
# ...but the template doesn't
template = Template('{{ 1 / 2 }}')
self.assertEqual(template.generate(), '0')
class StackTraceTest(unittest.TestCase):
def test_error_line_number_expression(self):
loader = DictLoader({"test.html": """one
two{{1/0}}
three
"""})
try:
loader.load("test.html").generate()
self.fail("did not get expected exception")
except ZeroDivisionError:
self.assertTrue("# test.html:2" in traceback.format_exc())
def test_error_line_number_directive(self):
loader = DictLoader({"test.html": """one
two{%if 1/0%}
three{%end%}
"""})
try:
loader.load("test.html").generate()
self.fail("did not get expected exception")
except ZeroDivisionError:
self.assertTrue("# test.html:2" in traceback.format_exc())
def test_error_line_number_module(self):
loader = DictLoader({
"base.html": "{% module Template('sub.html') %}",
"sub.html": "{{1/0}}",
}, namespace={"_tt_modules": ObjectDict({"Template": lambda path, **kwargs: loader.load(path).generate(**kwargs)})})
try:
loader.load("base.html").generate()
self.fail("did not get expected exception")
except ZeroDivisionError:
exc_stack = traceback.format_exc()
self.assertTrue('# base.html:1' in exc_stack)
self.assertTrue('# sub.html:1' in exc_stack)
def test_error_line_number_include(self):
loader = DictLoader({
"base.html": "{% include 'sub.html' %}",
"sub.html": "{{1/0}}",
})
try:
loader.load("base.html").generate()
self.fail("did not get expected exception")
except ZeroDivisionError:
self.assertTrue("# sub.html:1 (via base.html:1)" in
traceback.format_exc())
def test_error_line_number_extends_base_error(self):
loader = DictLoader({
"base.html": "{{1/0}}",
"sub.html": "{% extends 'base.html' %}",
})
try:
loader.load("sub.html").generate()
self.fail("did not get expected exception")
except ZeroDivisionError:
exc_stack = traceback.format_exc()
self.assertTrue("# base.html:1" in exc_stack)
def test_error_line_number_extends_sub_error(self):
loader = DictLoader({
"base.html": "{% block 'block' %}{% end %}",
"sub.html": """
{% extends 'base.html' %}
{% block 'block' %}
{{1/0}}
{% end %}
"""})
try:
loader.load("sub.html").generate()
self.fail("did not get expected exception")
except ZeroDivisionError:
self.assertTrue("# sub.html:4 (via base.html:1)" in
traceback.format_exc())
def test_multi_includes(self):
loader = DictLoader({
"a.html": "{% include 'b.html' %}",
"b.html": "{% include 'c.html' %}",
"c.html": "{{1/0}}",
})
try:
loader.load("a.html").generate()
self.fail("did not get expected exception")
except ZeroDivisionError:
self.assertTrue("# c.html:1 (via b.html:1, a.html:1)" in
traceback.format_exc())
class AutoEscapeTest(unittest.TestCase):
def setUp(self):
self.templates = {
"escaped.html": "{% autoescape xhtml_escape %}{{ name }}",
"unescaped.html": "{% autoescape None %}{{ name }}",
"default.html": "{{ name }}",
"include.html": """\
escaped: {% include 'escaped.html' %}
unescaped: {% include 'unescaped.html' %}
default: {% include 'default.html' %}
""",
"escaped_block.html": """\
{% autoescape xhtml_escape %}\
{% block name %}base: {{ name }}{% end %}""",
"unescaped_block.html": """\
{% autoescape None %}\
{% block name %}base: {{ name }}{% end %}""",
# Extend a base template with different autoescape policy,
# with and without overriding the base's blocks
"escaped_extends_unescaped.html": """\
{% autoescape xhtml_escape %}\
{% extends "unescaped_block.html" %}""",
"escaped_overrides_unescaped.html": """\
{% autoescape xhtml_escape %}\
{% extends "unescaped_block.html" %}\
{% block name %}extended: {{ name }}{% end %}""",
"unescaped_extends_escaped.html": """\
{% autoescape None %}\
{% extends "escaped_block.html" %}""",
"unescaped_overrides_escaped.html": """\
{% autoescape None %}\
{% extends "escaped_block.html" %}\
{% block name %}extended: {{ name }}{% end %}""",
"raw_expression.html": """\
{% autoescape xhtml_escape %}\
expr: {{ name }}
raw: {% raw name %}""",
}
def test_default_off(self):
loader = DictLoader(self.templates, autoescape=None)
name = "Bobby <table>s"
self.assertEqual(loader.load("escaped.html").generate(name=name),
b"Bobby &lt;table&gt;s")
self.assertEqual(loader.load("unescaped.html").generate(name=name),
b"Bobby <table>s")
self.assertEqual(loader.load("default.html").generate(name=name),
b"Bobby <table>s")
self.assertEqual(loader.load("include.html").generate(name=name),
b"escaped: Bobby &lt;table&gt;s\n"
b"unescaped: Bobby <table>s\n"
b"default: Bobby <table>s\n")
def test_default_on(self):
loader = DictLoader(self.templates, autoescape="xhtml_escape")
name = "Bobby <table>s"
self.assertEqual(loader.load("escaped.html").generate(name=name),
b"Bobby &lt;table&gt;s")
self.assertEqual(loader.load("unescaped.html").generate(name=name),
b"Bobby <table>s")
self.assertEqual(loader.load("default.html").generate(name=name),
b"Bobby &lt;table&gt;s")
self.assertEqual(loader.load("include.html").generate(name=name),
b"escaped: Bobby &lt;table&gt;s\n"
b"unescaped: Bobby <table>s\n"
b"default: Bobby &lt;table&gt;s\n")
def test_unextended_block(self):
loader = DictLoader(self.templates)
name = "<script>"
self.assertEqual(loader.load("escaped_block.html").generate(name=name),
b"base: &lt;script&gt;")
self.assertEqual(loader.load("unescaped_block.html").generate(name=name),
b"base: <script>")
def test_extended_block(self):
loader = DictLoader(self.templates)
def render(name):
return loader.load(name).generate(name="<script>")
self.assertEqual(render("escaped_extends_unescaped.html"),
b"base: <script>")
self.assertEqual(render("escaped_overrides_unescaped.html"),
b"extended: &lt;script&gt;")
self.assertEqual(render("unescaped_extends_escaped.html"),
b"base: &lt;script&gt;")
self.assertEqual(render("unescaped_overrides_escaped.html"),
b"extended: <script>")
def test_raw_expression(self):
loader = DictLoader(self.templates)
def render(name):
return loader.load(name).generate(name='<>&"')
self.assertEqual(render("raw_expression.html"),
b"expr: &lt;&gt;&amp;&quot;\n"
b"raw: <>&\"")
def test_custom_escape(self):
loader = DictLoader({"foo.py":
"{% autoescape py_escape %}s = {{ name }}\n"})
def py_escape(s):
self.assertEqual(type(s), bytes)
return repr(native_str(s))
def render(template, name):
return loader.load(template).generate(py_escape=py_escape,
name=name)
self.assertEqual(render("foo.py", "<html>"),
b"s = '<html>'\n")
self.assertEqual(render("foo.py", "';sys.exit()"),
b"""s = "';sys.exit()"\n""")
self.assertEqual(render("foo.py", ["not a string"]),
b"""s = "['not a string']"\n""")
def test_minimize_whitespace(self):
# Whitespace including newlines is allowed within template tags
# and directives, and this is one way to avoid long lines while
# keeping extra whitespace out of the rendered output.
loader = DictLoader({'foo.txt': """\
{% for i in items
%}{% if i > 0 %}, {% end %}{#
#}{{i
}}{% end
%}""",
})
self.assertEqual(loader.load("foo.txt").generate(items=range(5)),
b"0, 1, 2, 3, 4")
class TemplateLoaderTest(unittest.TestCase):
def setUp(self):
self.loader = Loader(os.path.join(os.path.dirname(__file__), "templates"))
def test_utf8_in_file(self):
tmpl = self.loader.load("utf8.html")
result = tmpl.generate()
self.assertEqual(to_unicode(result).strip(), u("H\u00e9llo"))
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