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
165
166
167
168
169
170
|
import WebIDL
import itertools
import string
# We'd like to use itertools.chain but it's 2.6 or higher.
def chain(*iterables):
# chain('ABC', 'DEF') --> A B C D E F
for it in iterables:
for element in it:
yield element
# We'd like to use itertools.combinations but it's 2.6 or higher.
def combinations(iterable, r):
# combinations('ABCD', 2) --> AB AC AD BC BD CD
# combinations(range(4), 3) --> 012 013 023 123
pool = tuple(iterable)
n = len(pool)
if r > n:
return
indices = range(r)
yield tuple(pool[i] for i in indices)
while True:
for i in reversed(range(r)):
if indices[i] != i + n - r:
break
else:
return
indices[i] += 1
for j in range(i+1, r):
indices[j] = indices[j-1] + 1
yield tuple(pool[i] for i in indices)
# We'd like to use itertools.combinations_with_replacement but it's 2.7 or
# higher.
def combinations_with_replacement(iterable, r):
# combinations_with_replacement('ABC', 2) --> AA AB AC BB BC CC
pool = tuple(iterable)
n = len(pool)
if not n and r:
return
indices = [0] * r
yield tuple(pool[i] for i in indices)
while True:
for i in reversed(range(r)):
if indices[i] != n - 1:
break
else:
return
indices[i:] = [indices[i] + 1] * (r - i)
yield tuple(pool[i] for i in indices)
def WebIDLTest(parser, harness):
types = ["float",
"double",
"short",
"unsigned short",
"long",
"unsigned long",
"long long",
"unsigned long long",
"boolean",
"byte",
"octet",
"DOMString",
"ByteString",
#"sequence<float>",
"object",
"ArrayBuffer",
#"Date",
"TestInterface1",
"TestInterface2"]
testPre = """
interface TestInterface1 {
};
interface TestInterface2 {
};
"""
interface = testPre + """
interface PrepareForTest {
"""
for (i, type) in enumerate(types):
interface += string.Template("""
readonly attribute ${type} attr${i};
""").substitute(i=i, type=type)
interface += """
};
"""
parser.parse(interface)
results = parser.finish()
iface = results[2]
parser = parser.reset()
def typesAreDistinguishable(t):
return all(u[0].isDistinguishableFrom(u[1]) for u in combinations(t, 2))
def typesAreNotDistinguishable(t):
return any(not u[0].isDistinguishableFrom(u[1]) for u in combinations(t, 2))
def unionTypeName(t):
if len(t) > 2:
t[0:2] = [unionTypeName(t[0:2])]
return "(" + " or ".join(t) + ")"
# typeCombinations is an iterable of tuples containing the name of the type
# as a string and the parsed IDL type.
def unionTypes(typeCombinations, predicate):
for c in typeCombinations:
if predicate(t[1] for t in c):
yield unionTypeName([t[0] for t in c])
# We limit invalid union types with a union member type to the subset of 3
# types with one invalid combination.
# typeCombinations is an iterable of tuples containing the name of the type
# as a string and the parsed IDL type.
def invalidUnionWithUnion(typeCombinations):
for c in typeCombinations:
if (typesAreNotDistinguishable((c[0][1], c[1][1])) and
typesAreDistinguishable((c[1][1], c[2][1])) and
typesAreDistinguishable((c[0][1], c[2][1]))):
yield unionTypeName([t[0] for t in c])
# Create a list of tuples containing the name of the type as a string and
# the parsed IDL type.
types = zip(types, (a.type for a in iface.members))
validUnionTypes = chain(unionTypes(combinations(types, 2), typesAreDistinguishable),
unionTypes(combinations(types, 3), typesAreDistinguishable))
invalidUnionTypes = chain(unionTypes(combinations_with_replacement(types, 2), typesAreNotDistinguishable),
invalidUnionWithUnion(combinations(types, 3)))
interface = testPre + """
interface TestUnion {
"""
for (i, type) in enumerate(validUnionTypes):
interface += string.Template("""
void method${i}(${type} arg);
${type} returnMethod${i}();
attribute ${type} attr${i};
void arrayMethod${i}(${type}[] arg);
${type}[] arrayReturnMethod${i}();
attribute ${type}[] arrayAttr${i};
void optionalMethod${i}(${type}? arg);
""").substitute(i=i, type=type)
interface += """
};
"""
parser.parse(interface)
results = parser.finish()
parser = parser.reset()
for invalid in invalidUnionTypes:
interface = testPre + string.Template("""
interface TestUnion {
void method(${type} arg);
};
""").substitute(type=invalid)
threw = False
try:
parser.parse(interface)
results = parser.finish()
except:
threw = True
harness.ok(threw, "Should have thrown.")
parser = parser.reset()
|
