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test_cpp_variable_writer.py
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79 lines (66 loc) · 3.03 KB
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import unittest
import io
from code_generation.core.code_generator import CppFile
from code_generation.cpp.cpp_variable import CppVariable
__doc__ = """Unit tests for C++ code generator
"""
class TestCppVariableStringIo(unittest.TestCase):
"""
Test C++ variable generation by writing to StringIO
"""
def test_cpp_var(self):
writer = io.StringIO()
cpp = CppFile(None, writer=writer)
variables = CppVariable(name="var1",
type="char*",
is_class_member=False,
is_static=False,
is_const=True,
initialization_value='0')
variables.render_to_string(cpp)
print(writer.getvalue())
self.assertEqual('const char* var1 = 0;\n', writer.getvalue())
def test_is_constexpr_const_raises(self):
writer = io.StringIO()
cpp = CppFile(None, writer=writer)
var = CppVariable(name="COUNT", type="int", is_class_member=True, is_const=True,
is_constexpr=True, initialization_value='0')
self.assertRaises(ValueError, var.render_to_string, cpp)
def test_is_constexpr_no_implementation_raises(self):
writer = io.StringIO()
cpp = CppFile(None, writer=writer)
var = CppVariable(name="COUNT", type="int", is_class_member=True, is_constexpr=True)
self.assertRaises(ValueError, var.render_to_string, cpp)
def test_is_constexpr_render_to_string(self):
writer = io.StringIO()
cpp = CppFile(None, writer=writer)
variables = CppVariable(name="COUNT",
type="int",
is_class_member=False,
is_constexpr=True,
initialization_value='0')
variables.render_to_string(cpp)
self.assertIn('constexpr int COUNT = 0;', writer.getvalue())
def test_is_constexpr_render_to_string_declaration(self):
writer = io.StringIO()
cpp = CppFile(None, writer=writer)
variables = CppVariable(name="COUNT",
type="int",
is_class_member=True,
is_constexpr=True,
initialization_value='0')
variables.render_to_string_declaration(cpp)
self.assertIn('constexpr int COUNT = 0;', writer.getvalue())
def test_is_extern_static_raises(self):
writer = io.StringIO()
cpp = CppFile(None, writer=writer)
var = CppVariable(name="var1", type="char*", is_static=True, is_extern=True)
self.assertRaises(ValueError, var.render_to_string, cpp)
def test_is_extern_render_to_string(self):
writer = io.StringIO()
cpp = CppFile(None, writer=writer)
v = CppVariable(name="var1", type="char*", is_extern=True)
v.render_to_string(cpp)
self.assertIn('extern char* var1;', writer.getvalue())
if __name__ == "__main__":
unittest.main()