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require 'test_helper'
module SecurityFilter
def add_one(input)
"#{input} + 1"
end
end
class SecurityTest < Minitest::Test
include Liquid
def setup
@assigns = {}
end
def test_no_instance_eval
text = %( {{ '1+1' | instance_eval }} )
expected = %( 1+1 )
assert_equal expected, Template.parse(text).render!(@assigns)
end
def test_no_existing_instance_eval
text = %( {{ '1+1' | __instance_eval__ }} )
expected = %( 1+1 )
assert_equal expected, Template.parse(text).render!(@assigns)
end
def test_no_instance_eval_after_mixing_in_new_filter
text = %( {{ '1+1' | instance_eval }} )
expected = %( 1+1 )
assert_equal expected, Template.parse(text).render!(@assigns)
end
def test_no_instance_eval_later_in_chain
text = %( {{ '1+1' | add_one | instance_eval }} )
expected = %( 1+1 + 1 )
assert_equal expected, Template.parse(text).render!(@assigns, filters: SecurityFilter)
end
def test_does_not_add_filters_to_symbol_table
current_symbols = Symbol.all_symbols
test = %( {{ "some_string" | a_bad_filter }} )
template = Template.parse(test)
assert_equal [], (Symbol.all_symbols - current_symbols)
template.render!
assert_equal [], (Symbol.all_symbols - current_symbols)
end
def test_does_not_add_drop_methods_to_symbol_table
current_symbols = Symbol.all_symbols
assigns = { 'drop' => Drop.new }
assert_equal "", Template.parse("{{ drop.custom_method_1 }}", assigns).render!
assert_equal "", Template.parse("{{ drop.custom_method_2 }}", assigns).render!
assert_equal "", Template.parse("{{ drop.custom_method_3 }}", assigns).render!
assert_equal [], (Symbol.all_symbols - current_symbols)
end
def test_max_depth_nested_blocks_does_not_raise_exception
depth = Liquid::Block::MAX_DEPTH
code = "{% if true %}" * depth + "rendered" + "{% endif %}" * depth
assert_equal "rendered", Template.parse(code).render!
end
def test_more_than_max_depth_nested_blocks_raises_exception
depth = Liquid::Block::MAX_DEPTH + 1
code = "{% if true %}" * depth + "rendered" + "{% endif %}" * depth
assert_raises(Liquid::StackLevelError) do
Template.parse(code).render!
end
end
end # SecurityTest
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