1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
|
require 'test_helper'
class StrainerUnitTest < Minitest::Test
include Liquid
module AccessScopeFilters
def public_filter
"public"
end
def private_filter
"private"
end
private :private_filter
end
Strainer.global_filter(AccessScopeFilters)
def test_strainer
strainer = Strainer.create(nil)
assert_equal 5, strainer.invoke('size', 'input')
assert_equal "public", strainer.invoke("public_filter")
end
def test_stainer_raises_argument_error
strainer = Strainer.create(nil)
assert_raises(Liquid::ArgumentError) do
strainer.invoke("public_filter", 1)
end
end
def test_stainer_argument_error_contains_backtrace
strainer = Strainer.create(nil)
begin
strainer.invoke("public_filter", 1)
rescue Liquid::ArgumentError => e
assert_match(
/\ALiquid error: wrong number of arguments \((1 for 0|given 1, expected 0)\)\z/,
e.message)
assert_equal e.backtrace[0].split(':')[0], __FILE__
end
end
def test_strainer_only_invokes_public_filter_methods
strainer = Strainer.create(nil)
assert_equal false, strainer.class.invokable?('__test__')
assert_equal false, strainer.class.invokable?('test')
assert_equal false, strainer.class.invokable?('instance_eval')
assert_equal false, strainer.class.invokable?('__send__')
assert_equal true, strainer.class.invokable?('size') # from the standard lib
end
def test_strainer_returns_nil_if_no_filter_method_found
strainer = Strainer.create(nil)
assert_nil strainer.invoke("private_filter")
assert_nil strainer.invoke("undef_the_filter")
end
def test_strainer_returns_first_argument_if_no_method_and_arguments_given
strainer = Strainer.create(nil)
assert_equal "password", strainer.invoke("undef_the_method", "password")
end
def test_strainer_only_allows_methods_defined_in_filters
strainer = Strainer.create(nil)
assert_equal "1 + 1", strainer.invoke("instance_eval", "1 + 1")
assert_equal "puts", strainer.invoke("__send__", "puts", "Hi Mom")
assert_equal "has_method?", strainer.invoke("invoke", "has_method?", "invoke")
end
def test_strainer_uses_a_class_cache_to_avoid_method_cache_invalidation
a = Module.new
b = Module.new
strainer = Strainer.create(nil, [a, b])
assert_kind_of Strainer, strainer
assert_kind_of a, strainer
assert_kind_of b, strainer
assert_kind_of Liquid::StandardFilters, strainer
end
def test_add_filter_when_wrong_filter_class
c = Context.new
s = c.strainer
wrong_filter = ->(v) { v.reverse }
assert_raises ArgumentError do
s.class.add_filter(wrong_filter)
end
end
module PrivateMethodOverrideFilter
private
def public_filter
"overriden as private"
end
end
def test_add_filter_raises_when_module_privately_overrides_registered_public_methods
strainer = Context.new.strainer
error = assert_raises(Liquid::MethodOverrideError) do
strainer.class.add_filter(PrivateMethodOverrideFilter)
end
assert_equal 'Liquid error: Filter overrides registered public methods as non public: public_filter', error.message
end
module ProtectedMethodOverrideFilter
protected
def public_filter
"overriden as protected"
end
end
def test_add_filter_raises_when_module_overrides_registered_public_method_as_protected
strainer = Context.new.strainer
error = assert_raises(Liquid::MethodOverrideError) do
strainer.class.add_filter(ProtectedMethodOverrideFilter)
end
assert_equal 'Liquid error: Filter overrides registered public methods as non public: public_filter', error.message
end
module PublicMethodOverrideFilter
def public_filter
"public"
end
end
def test_add_filter_does_not_raise_when_module_overrides_previously_registered_method
strainer = Context.new.strainer
strainer.class.add_filter(PublicMethodOverrideFilter)
assert strainer.class.filter_methods.include?('public_filter')
end
module LateAddedFilter
def late_added_filter(input)
"filtered"
end
end
def test_global_filter_clears_cache
assert_equal 'input', Strainer.create(nil).invoke('late_added_filter', 'input')
Strainer.global_filter(LateAddedFilter)
assert_equal 'filtered', Strainer.create(nil).invoke('late_added_filter', 'input')
end
def test_add_filter_does_not_include_already_included_module
mod = Module.new do
class << self
attr_accessor :include_count
def included(mod)
self.include_count += 1
end
end
self.include_count = 0
end
strainer = Context.new.strainer
strainer.class.add_filter(mod)
strainer.class.add_filter(mod)
assert_equal 1, mod.include_count
end
end # StrainerTest
|
