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#!/usr/bin/env python3
# Copyright 2024 The Chromium Authors
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
"""Tests for gcc_preprocess.py
This test suite contains various tests for the 'java_cpp_template' build rule,
which uses the gcc preprocessor to turn a template into Java code.
"""
import unittest
import tempfile
import gcc_preprocess
class TestPreprocess(unittest.TestCase):
def testParsePackageName(self):
with tempfile.NamedTemporaryFile(mode='w') as f:
template = f.name
f.file.write("""
package org.chromium.fake;
public class Empty {
}
""")
f.file.flush()
package_name, data = gcc_preprocess.ProcessJavaFile(template, [], [])
self.assertEqual('org.chromium.fake', package_name)
self.assertEqual(
"""
package org.chromium.fake;
public class Empty {
}
""".strip(), data.strip())
def testMissingPackageName(self):
with tempfile.NamedTemporaryFile(mode='w') as f:
template = f.name
f.file.write("""
public class Empty {
}
""")
f.file.flush()
with self.assertRaisesRegex(Exception,
r'Could not find java package of.*'):
gcc_preprocess.ProcessJavaFile(template, [], [])
def testSinglePreprocessorEvaluation(self):
with tempfile.NamedTemporaryFile(mode='w') as f:
template = f.name
f.file.write("""
package org.chromium.fake;
public class Sample {
#if defined(_ENABLE_ASSERTS)
public boolean ENABLE_ASSERTS = true;
#else
public boolean ENABLE_ASSERTS = false;
#endif
}
""")
f.file.flush()
defines = [
'_ENABLE_ASSERTS',
]
package_name, data = gcc_preprocess.ProcessJavaFile(template, defines, [])
self.assertEqual('org.chromium.fake', package_name)
self.assertEqual(
"""
package org.chromium.fake;
public class Sample {
public boolean ENABLE_ASSERTS = true;
}
""".strip(), data.strip())
def testNestedPreprocessorEvaluation(self):
with tempfile.NamedTemporaryFile(mode='w') as f:
template = f.name
f.file.write("""
package org.chromium.fake;
#if defined(USE_FINAL)
#define MAYBE_FINAL final
#else
#define MAYBE_FINAL
#endif
public class Sample {
#if defined(_ENABLE_ASSERTS)
public MAYBE_FINAL boolean ENABLE_ASSERTS = true;
#else
public MAYBE_FINAL boolean ENABLE_ASSERTS = false;
#endif
}
""")
f.file.flush()
defines = [
'_ENABLE_ASSERTS',
'USE_FINAL',
]
package_name, data = gcc_preprocess.ProcessJavaFile(template, defines, [])
self.assertEqual('org.chromium.fake', package_name)
self.assertEqual(
"""
package org.chromium.fake;
public class Sample {
public final boolean ENABLE_ASSERTS = true;
}
""".strip(), data.strip())
def testPreserveComments(self):
with tempfile.NamedTemporaryFile(mode='w') as f:
template = f.name
f.file.write("""
// Copyright header ...
package org.chromium.fake;
/**
* Some javadoc.
*/
public class Sample {
// This is a comment outside the #if block.
#if defined(_ENABLE_ASSERTS)
// Inside the #if block.
public boolean ENABLE_ASSERTS = true;
#else
// Inside the #else block.
public boolean ENABLE_ASSERTS = false;
#endif
}
""")
f.file.flush()
defines = [
'_ENABLE_ASSERTS',
]
package_name, data = gcc_preprocess.ProcessJavaFile(template, defines, [])
self.assertEqual('org.chromium.fake', package_name)
self.assertEqual(
"""
// Copyright header ...
package org.chromium.fake;
/**
* Some javadoc.
*/
public class Sample {
// This is a comment outside the #if block.
// Inside the #if block.
public boolean ENABLE_ASSERTS = true;
}
""".strip(), data.strip())
if __name__ == '__main__':
unittest.main()
|
