# Copyright 2014 The Chromium Authors
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
import unittest
from mojom.generate import module as mojom
from mojom.generate import translate
from mojom.parse import ast
class TranslateTest(unittest.TestCase):
"""Tests |parser.Parse()|."""
def testSimpleArray(self):
"""Tests a simple int32[]."""
# pylint: disable=W0212
self.assertEquals(
translate._MapKind(ast.Array(ast.Typename(ast.Identifier('int32')))),
"a:i32")
def testAssociativeArray(self):
"""Tests a simple uint8{string}."""
# pylint: disable=W0212
self.assertEquals(
translate._MapKind(
ast.Map(ast.Identifier('string'),
ast.Typename(ast.Identifier('uint8')))), "m[s][u8]")
def testLeftToRightAssociativeArray(self):
"""Makes sure that parsing is done from right to left on the internal kinds
in the presence of an associative array."""
# pylint: disable=W0212
self.assertEquals(
translate._MapKind(
ast.Map(
ast.Identifier('string'),
ast.Typename(ast.Array(ast.Typename(
ast.Identifier('uint8')))))), "m[s][a:u8]")
def testTranslateSimpleUnions(self):
"""Makes sure that a simple union is translated correctly."""
tree = ast.Mojom(None, ast.ImportList(), [
ast.Union(
ast.Name("SomeUnion"), None,
ast.UnionBody([
ast.UnionField(ast.Name("a"), None, None,
ast.Typename(ast.Identifier("int32"))),
ast.UnionField(ast.Name("b"), None, None,
ast.Typename(ast.Identifier("string")))
]))
])
translation = translate.OrderedModule(tree, "mojom_tree", [])
self.assertEqual(1, len(translation.unions))
union = translation.unions[0]
self.assertTrue(isinstance(union, mojom.Union))
self.assertEqual("SomeUnion", union.mojom_name)
self.assertEqual(2, len(union.fields))
self.assertEqual("a", union.fields[0].mojom_name)
self.assertEqual(mojom.INT32.spec, union.fields[0].kind.spec)
self.assertEqual("b", union.fields[1].mojom_name)
self.assertEqual(mojom.STRING.spec, union.fields[1].kind.spec)
def testMapKindRaisesWithDuplicate(self):
"""Verifies _MapTreeForType() raises when passed two values with the same
name."""
methods = [
ast.Method(ast.Name('dup'), None, None, ast.ParameterList(), None),
ast.Method(ast.Name('dup'), None, None, ast.ParameterList(), None)
]
with self.assertRaises(Exception):
translate._ElemsOfType(methods, ast.Method, 'scope')
def testAssociatedKinds(self):
"""Tests type spec translation of associated interfaces and requests."""
# pylint: disable=W0212
self.assertEquals(
translate._MapKind(
ast.Typename(ast.Receiver(ast.Identifier('SomeInterface'),
associated=True),
nullable=True)), "?rca:x:SomeInterface")
def testSelfRecursiveUnions(self):
"""Verifies _UnionField() raises when a union is self-recursive."""
tree = ast.Mojom(None, ast.ImportList(), [
ast.Union(
ast.Name("SomeUnion"), None,
ast.UnionBody([
ast.UnionField(ast.Name("a"), None, None,
ast.Typename(ast.Identifier("SomeUnion")))
]))
])
with self.assertRaises(Exception):
translate.OrderedModule(tree, "mojom_tree", [])
tree = ast.Mojom(None, ast.ImportList(), [
ast.Union(
ast.Name("SomeUnion"), None,
ast.UnionBody([
ast.UnionField(
ast.Name("a"), None, None,
ast.Typename(ast.Identifier("SomeUnion"), nullable=True))
]))
])
with self.assertRaises(Exception):
translate.OrderedModule(tree, "mojom_tree", [])
def testDuplicateAttributesException(self):
tree = ast.Mojom(None, ast.ImportList(), [
ast.Union(
ast.Name("FakeUnion"),
ast.AttributeList([
ast.Attribute(ast.Name("key1"), ast.Name("value")),
ast.Attribute(ast.Name("key1"), ast.Name("value"))
]),
ast.UnionBody([
ast.UnionField(ast.Name("a"), None, None,
ast.Typename(ast.Identifier("int32"))),
ast.UnionField(ast.Name("b"), None, None,
ast.Typename(ast.Identifier("string")))
]))
])
with self.assertRaises(Exception):
translate.OrderedModule(tree, "mojom_tree", [])
def testEnumWithReservedValues(self):
"""Verifies that assigning reserved values to enumerators fails."""
# -128 is reserved for the empty representation in WTF::HashTraits.
tree = ast.Mojom(None, ast.ImportList(), [
ast.Enum(
ast.Name("MyEnum"), None,
ast.EnumValueList([
ast.EnumValue(ast.Name('kReserved'), None,
ast.Literal('int', '-128')),
]))
])
with self.assertRaises(Exception) as context:
translate.OrderedModule(tree, "mojom_tree", [])
self.assertIn("reserved for WTF::HashTrait", str(context.exception))
# -127 is reserved for the deleted representation in WTF::HashTraits.
tree = ast.Mojom(None, ast.ImportList(), [
ast.Enum(
ast.Name("MyEnum"), None,
ast.EnumValueList([
ast.EnumValue(ast.Name('kReserved'), None,
ast.Literal('int', '-127')),
]))
])
with self.assertRaises(Exception) as context:
translate.OrderedModule(tree, "mojom_tree", [])
self.assertIn("reserved for WTF::HashTrait", str(context.exception))
# Implicitly assigning a reserved value should also fail.
tree = ast.Mojom(None, ast.ImportList(), [
ast.Enum(
ast.Name("MyEnum"), None,
ast.EnumValueList([
ast.EnumValue(ast.Name('kNotReserved'), None,
ast.Literal('int', '-129')),
ast.EnumValue(ast.Name('kImplicitlyReserved'), None, None),
]))
])
with self.assertRaises(Exception) as context:
translate.OrderedModule(tree, "mojom_tree", [])
self.assertIn("reserved for WTF::HashTrait", str(context.exception))
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