ceph/src/googletest/googlemock/scripts/generator/cpp/gmock_class_test.py

   1 #!/usr/bin/env python
   2 #
   3 # Copyright 2009 Neal Norwitz All Rights Reserved.
   4 # Portions Copyright 2009 Google Inc. All Rights Reserved.
   5 #
   6 # Licensed under the Apache License, Version 2.0 (the "License");
   7 # you may not use this file except in compliance with the License.
   8 # You may obtain a copy of the License at
   9 #
  10 #      http://www.apache.org/licenses/LICENSE-2.0
  11 #
  12 # Unless required by applicable law or agreed to in writing, software
  13 # distributed under the License is distributed on an "AS IS" BASIS,
  14 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  15 # See the License for the specific language governing permissions and
  16 # limitations under the License.
  17
  18 """Tests for gmock.scripts.generator.cpp.gmock_class."""
  19
  20 __author__ = 'nnorwitz@google.com (Neal Norwitz)'
  21
  22
  23 import os
  24 import sys
  25 import unittest
  26
  27 # Allow the cpp imports below to work when run as a standalone script.
  28 sys.path.append(os.path.join(os.path.dirname(__file__), '..'))
  29
  30 from cpp import ast
  31 from cpp import gmock_class
  32
  33
  34 class TestCase(unittest.TestCase):
  35   """Helper class that adds assert methods."""
  36
  37   def StripLeadingWhitespace(self, lines):
  38     """Strip leading whitespace in each line in 'lines'."""
  39     return '\n'.join([s.lstrip() for s in lines.split('\n')])
  40
  41   def assertEqualIgnoreLeadingWhitespace(self, expected_lines, lines):
  42     """Specialized assert that ignores the indent level."""
  43     self.assertEqual(expected_lines, self.StripLeadingWhitespace(lines))
  44
  45
  46 class GenerateMethodsTest(TestCase):
  47
  48   def GenerateMethodSource(self, cpp_source):
  49     """Convert C++ source to Google Mock output source lines."""
  50     method_source_lines = []
  51     # <test> is a pseudo-filename, it is not read or written.
  52     builder = ast.BuilderFromSource(cpp_source, '<test>')
  53     ast_list = list(builder.Generate())
  54     gmock_class._GenerateMethods(method_source_lines, cpp_source, ast_list[0])
  55     return '\n'.join(method_source_lines)
  56
  57   def testSimpleMethod(self):
  58     source = """
  59 class Foo {
  60  public:
  61   virtual int Bar();
  62 };
  63 """
  64     self.assertEqualIgnoreLeadingWhitespace(
  65         'MOCK_METHOD0(Bar,\nint());',
  66         self.GenerateMethodSource(source))
  67
  68   def testSimpleConstructorsAndDestructor(self):
  69     source = """
  70 class Foo {
  71  public:
  72   Foo();
  73   Foo(int x);
  74   Foo(const Foo& f);
  75   Foo(Foo&& f);
  76   ~Foo();
  77   virtual int Bar() = 0;
  78 };
  79 """
  80     # The constructors and destructor should be ignored.
  81     self.assertEqualIgnoreLeadingWhitespace(
  82         'MOCK_METHOD0(Bar,\nint());',
  83         self.GenerateMethodSource(source))
  84
  85   def testVirtualDestructor(self):
  86     source = """
  87 class Foo {
  88  public:
  89   virtual ~Foo();
  90   virtual int Bar() = 0;
  91 };
  92 """
  93     # The destructor should be ignored.
  94     self.assertEqualIgnoreLeadingWhitespace(
  95         'MOCK_METHOD0(Bar,\nint());',
  96         self.GenerateMethodSource(source))
  97
  98   def testExplicitlyDefaultedConstructorsAndDestructor(self):
  99     source = """
 100 class Foo {
 101  public:
 102   Foo() = default;
 103   Foo(const Foo& f) = default;
 104   Foo(Foo&& f) = default;
 105   ~Foo() = default;
 106   virtual int Bar() = 0;
 107 };
 108 """
 109     # The constructors and destructor should be ignored.
 110     self.assertEqualIgnoreLeadingWhitespace(
 111         'MOCK_METHOD0(Bar,\nint());',
 112         self.GenerateMethodSource(source))
 113
 114   def testExplicitlyDeletedConstructorsAndDestructor(self):
 115     source = """
 116 class Foo {
 117  public:
 118   Foo() = delete;
 119   Foo(const Foo& f) = delete;
 120   Foo(Foo&& f) = delete;
 121   ~Foo() = delete;
 122   virtual int Bar() = 0;
 123 };
 124 """
 125     # The constructors and destructor should be ignored.
 126     self.assertEqualIgnoreLeadingWhitespace(
 127         'MOCK_METHOD0(Bar,\nint());',
 128         self.GenerateMethodSource(source))
 129
 130   def testSimpleOverrideMethod(self):
 131     source = """
 132 class Foo {
 133  public:
 134   int Bar() override;
 135 };
 136 """
 137     self.assertEqualIgnoreLeadingWhitespace(
 138         'MOCK_METHOD0(Bar,\nint());',
 139         self.GenerateMethodSource(source))
 140
 141   def testSimpleConstMethod(self):
 142     source = """
 143 class Foo {
 144  public:
 145   virtual void Bar(bool flag) const;
 146 };
 147 """
 148     self.assertEqualIgnoreLeadingWhitespace(
 149         'MOCK_CONST_METHOD1(Bar,\nvoid(bool flag));',
 150         self.GenerateMethodSource(source))
 151
 152   def testExplicitVoid(self):
 153     source = """
 154 class Foo {
 155  public:
 156   virtual int Bar(void);
 157 };
 158 """
 159     self.assertEqualIgnoreLeadingWhitespace(
 160         'MOCK_METHOD0(Bar,\nint(void));',
 161         self.GenerateMethodSource(source))
 162
 163   def testStrangeNewlineInParameter(self):
 164     source = """
 165 class Foo {
 166  public:
 167   virtual void Bar(int
 168 a) = 0;
 169 };
 170 """
 171     self.assertEqualIgnoreLeadingWhitespace(
 172         'MOCK_METHOD1(Bar,\nvoid(int a));',
 173         self.GenerateMethodSource(source))
 174
 175   def testDefaultParameters(self):
 176     source = """
 177 class Foo {
 178  public:
 179   virtual void Bar(int a, char c = 'x') = 0;
 180 };
 181 """
 182     self.assertEqualIgnoreLeadingWhitespace(
 183         'MOCK_METHOD2(Bar,\nvoid(int, char));',
 184         self.GenerateMethodSource(source))
 185
 186   def testMultipleDefaultParameters(self):
 187     source = """
 188 class Foo {
 189  public:
 190   virtual void Bar(int a = 42, char c = 'x') = 0;
 191 };
 192 """
 193     self.assertEqualIgnoreLeadingWhitespace(
 194         'MOCK_METHOD2(Bar,\nvoid(int, char));',
 195         self.GenerateMethodSource(source))
 196
 197   def testRemovesCommentsWhenDefaultsArePresent(self):
 198     source = """
 199 class Foo {
 200  public:
 201   virtual void Bar(int a = 42 /* a comment */,
 202                    char /* other comment */ c= 'x') = 0;
 203 };
 204 """
 205     self.assertEqualIgnoreLeadingWhitespace(
 206         'MOCK_METHOD2(Bar,\nvoid(int, char));',
 207         self.GenerateMethodSource(source))
 208
 209   def testDoubleSlashCommentsInParameterListAreRemoved(self):
 210     source = """
 211 class Foo {
 212  public:
 213   virtual void Bar(int a,  // inline comments should be elided.
 214                    int b   // inline comments should be elided.
 215                    ) const = 0;
 216 };
 217 """
 218     self.assertEqualIgnoreLeadingWhitespace(
 219         'MOCK_CONST_METHOD2(Bar,\nvoid(int a, int b));',
 220         self.GenerateMethodSource(source))
 221
 222   def testCStyleCommentsInParameterListAreNotRemoved(self):
 223     # NOTE(nnorwitz): I'm not sure if it's the best behavior to keep these
 224     # comments.  Also note that C style comments after the last parameter
 225     # are still elided.
 226     source = """
 227 class Foo {
 228  public:
 229   virtual const string& Bar(int /* keeper */, int b);
 230 };
 231 """
 232     self.assertEqualIgnoreLeadingWhitespace(
 233         'MOCK_METHOD2(Bar,\nconst string&(int /* keeper */, int b));',
 234         self.GenerateMethodSource(source))
 235
 236   def testArgsOfTemplateTypes(self):
 237     source = """
 238 class Foo {
 239  public:
 240   virtual int Bar(const vector<int>& v, map<int, string>* output);
 241 };"""
 242     self.assertEqualIgnoreLeadingWhitespace(
 243         'MOCK_METHOD2(Bar,\n'
 244         'int(const vector<int>& v, map<int, string>* output));',
 245         self.GenerateMethodSource(source))
 246
 247   def testReturnTypeWithOneTemplateArg(self):
 248     source = """
 249 class Foo {
 250  public:
 251   virtual vector<int>* Bar(int n);
 252 };"""
 253     self.assertEqualIgnoreLeadingWhitespace(
 254         'MOCK_METHOD1(Bar,\nvector<int>*(int n));',
 255         self.GenerateMethodSource(source))
 256
 257   def testReturnTypeWithManyTemplateArgs(self):
 258     source = """
 259 class Foo {
 260  public:
 261   virtual map<int, string> Bar();
 262 };"""
 263     # Comparing the comment text is brittle - we'll think of something
 264     # better in case this gets annoying, but for now let's keep it simple.
 265     self.assertEqualIgnoreLeadingWhitespace(
 266         '// The following line won\'t really compile, as the return\n'
 267         '// type has multiple template arguments.  To fix it, use a\n'
 268         '// typedef for the return type.\n'
 269         'MOCK_METHOD0(Bar,\nmap<int, string>());',
 270         self.GenerateMethodSource(source))
 271
 272   def testSimpleMethodInTemplatedClass(self):
 273     source = """
 274 template<class T>
 275 class Foo {
 276  public:
 277   virtual int Bar();
 278 };
 279 """
 280     self.assertEqualIgnoreLeadingWhitespace(
 281         'MOCK_METHOD0_T(Bar,\nint());',
 282         self.GenerateMethodSource(source))
 283
 284   def testPointerArgWithoutNames(self):
 285     source = """
 286 class Foo {
 287   virtual int Bar(C*);
 288 };
 289 """
 290     self.assertEqualIgnoreLeadingWhitespace(
 291         'MOCK_METHOD1(Bar,\nint(C*));',
 292         self.GenerateMethodSource(source))
 293
 294   def testReferenceArgWithoutNames(self):
 295     source = """
 296 class Foo {
 297   virtual int Bar(C&);
 298 };
 299 """
 300     self.assertEqualIgnoreLeadingWhitespace(
 301         'MOCK_METHOD1(Bar,\nint(C&));',
 302         self.GenerateMethodSource(source))
 303
 304   def testArrayArgWithoutNames(self):
 305     source = """
 306 class Foo {
 307   virtual int Bar(C[]);
 308 };
 309 """
 310     self.assertEqualIgnoreLeadingWhitespace(
 311         'MOCK_METHOD1(Bar,\nint(C[]));',
 312         self.GenerateMethodSource(source))
 313
 314
 315 class GenerateMocksTest(TestCase):
 316
 317   def GenerateMocks(self, cpp_source):
 318     """Convert C++ source to complete Google Mock output source."""
 319     # <test> is a pseudo-filename, it is not read or written.
 320     filename = '<test>'
 321     builder = ast.BuilderFromSource(cpp_source, filename)
 322     ast_list = list(builder.Generate())
 323     lines = gmock_class._GenerateMocks(filename, cpp_source, ast_list, None)
 324     return '\n'.join(lines)
 325
 326   def testNamespaces(self):
 327     source = """
 328 namespace Foo {
 329 namespace Bar { class Forward; }
 330 namespace Baz {
 331
 332 class Test {
 333  public:
 334   virtual void Foo();
 335 };
 336
 337 }  // namespace Baz
 338 }  // namespace Foo
 339 """
 340     expected = """\
 341 namespace Foo {
 342 namespace Baz {
 343
 344 class MockTest : public Test {
 345 public:
 346 MOCK_METHOD0(Foo,
 347 void());
 348 };
 349
 350 }  // namespace Baz
 351 }  // namespace Foo
 352 """
 353     self.assertEqualIgnoreLeadingWhitespace(
 354         expected, self.GenerateMocks(source))
 355
 356   def testClassWithStorageSpecifierMacro(self):
 357     source = """
 358 class STORAGE_SPECIFIER Test {
 359  public:
 360   virtual void Foo();
 361 };
 362 """
 363     expected = """\
 364 class MockTest : public Test {
 365 public:
 366 MOCK_METHOD0(Foo,
 367 void());
 368 };
 369 """
 370     self.assertEqualIgnoreLeadingWhitespace(
 371         expected, self.GenerateMocks(source))
 372
 373   def testTemplatedForwardDeclaration(self):
 374     source = """
 375 template <class T> class Forward;  // Forward declaration should be ignored.
 376 class Test {
 377  public:
 378   virtual void Foo();
 379 };
 380 """
 381     expected = """\
 382 class MockTest : public Test {
 383 public:
 384 MOCK_METHOD0(Foo,
 385 void());
 386 };
 387 """
 388     self.assertEqualIgnoreLeadingWhitespace(
 389         expected, self.GenerateMocks(source))
 390
 391   def testTemplatedClass(self):
 392     source = """
 393 template <typename S, typename T>
 394 class Test {
 395  public:
 396   virtual void Foo();
 397 };
 398 """
 399     expected = """\
 400 template <typename T0, typename T1>
 401 class MockTest : public Test<T0, T1> {
 402 public:
 403 MOCK_METHOD0_T(Foo,
 404 void());
 405 };
 406 """
 407     self.assertEqualIgnoreLeadingWhitespace(
 408         expected, self.GenerateMocks(source))
 409
 410   def testTemplateInATemplateTypedef(self):
 411     source = """
 412 class Test {
 413  public:
 414   typedef std::vector<std::list<int>> FooType;
 415   virtual void Bar(const FooType& test_arg);
 416 };
 417 """
 418     expected = """\
 419 class MockTest : public Test {
 420 public:
 421 MOCK_METHOD1(Bar,
 422 void(const FooType& test_arg));
 423 };
 424 """
 425     self.assertEqualIgnoreLeadingWhitespace(
 426         expected, self.GenerateMocks(source))
 427
 428   def testTemplateInATemplateTypedefWithComma(self):
 429     source = """
 430 class Test {
 431  public:
 432   typedef std::function<void(
 433       const vector<std::list<int>>&, int> FooType;
 434   virtual void Bar(const FooType& test_arg);
 435 };
 436 """
 437     expected = """\
 438 class MockTest : public Test {
 439 public:
 440 MOCK_METHOD1(Bar,
 441 void(const FooType& test_arg));
 442 };
 443 """
 444     self.assertEqualIgnoreLeadingWhitespace(
 445         expected, self.GenerateMocks(source))
 446
 447 if __name__ == '__main__':
 448   unittest.main()