Initial drop of Google Mock. The files are incomplete and thus may not build correctly yet.

scripts/generator/cpp/gmock_class.py

@@ -0,0 +1,148 @@
+#!/usr/bin/env python
+#
+# Copyright 2008 Google Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""Generate a Google Mock class from a production class.
+
+This program will read in a C++ source file and output the Google Mock class
+for the specified class.
+
+Usage:
+  gmock_class.py header-file.h ClassName
+
+Output is sent to stdout.
+"""
+
+__author__ = 'nnorwitz@google.com (Neal Norwitz)'
+
+
+import os
+import re
+import sys
+
+from cpp import ast
+from cpp import utils
+
+# How many spaces to indent.  Can me set with INDENT environment variable.
+_INDENT = 2
+
+
+def _GenerateMethods(output_lines, source, class_node):
+  function_type = ast.FUNCTION_VIRTUAL | ast.FUNCTION_PURE_VIRTUAL
+  ctor_or_dtor = ast.FUNCTION_CTOR | ast.FUNCTION_DTOR
+
+  for node in class_node.body:
+    # We only care about virtual functions.
+    if (isinstance(node, ast.Function) and
+        node.modifiers & function_type and
+        not node.modifiers & ctor_or_dtor):
+      # Pick out all the elements we need from the original function.
+      const = ''
+      if node.modifiers & ast.FUNCTION_CONST:
+        const = 'CONST_'
+      return_type = 'void'
+      if node.return_type:
+        return_type = node.return_type.name
+        if node.return_type.pointer:
+          return_type += '*'
+        if node.return_type.reference:
+          return_type += '&'
+      prefix = 'MOCK_%sMETHOD%d' % (const, len(node.parameters))
+      args = ''
+      if node.parameters:
+        # Get the full text of the parameters from the start
+        # of the first parameter to the end of the last parameter.
+        start = node.parameters[0].start
+        end = node.parameters[-1].end
+        args = re.sub('  +', ' ', source[start:end].replace('\n', ''))
+
+      # Create the prototype.
+      indent = ' ' * _INDENT
+      line = ('%s%s(%s,\n%s%s(%s));' %
+              (indent, prefix, node.name, indent*3, return_type, args))
+      output_lines.append(line)
+
+
+def _GenerateMock(filename, source, ast_list, class_name):
+  lines = []
+  for node in ast_list:
+    if isinstance(node, ast.Class) and node.body and node.name == class_name:
+      class_node = node
+      # Add namespace before the class.
+      if class_node.namespace:
+        lines.extend(['namespace %s {' % n for n in class_node.namespace])  # }
+        lines.append('')
+
+      # Add the class prolog.
+      lines.append('class Mock%s : public %s {' % (class_name, class_name))  # }
+      lines.append('%spublic:' % (' ' * (_INDENT // 2)))
+
+      # Add all the methods.
+      _GenerateMethods(lines, source, class_node)
+
+      # Close the class.
+      if lines:
+        # If there are no virtual methods, no need for a public label.
+        if len(lines) == 2:
+          del lines[-1]
+
+        # Only close the class if there really is a class.
+        lines.append('};')
+        lines.append('')  # Add an extra newline.
+
+      # Close the namespace.
+      if class_node.namespace:
+        for i in range(len(class_node.namespace)-1, -1, -1):
+          lines.append('}  // namespace %s' % class_node.namespace[i])
+        lines.append('')  # Add an extra newline.
+
+  if lines:
+    sys.stdout.write('\n'.join(lines))
+  else:
+    sys.stderr.write('Class %s not found\n' % class_name)
+
+
+def main(argv=sys.argv):
+  if len(argv) != 3:
+    sys.stdout.write(__doc__)
+    return 1
+
+  global _INDENT
+  try:
+    _INDENT = int(os.environ['INDENT'])
+  except KeyError:
+    pass
+  except:
+    sys.stderr.write('Unable to use indent of %s\n' % os.environ.get('INDENT'))
+
+  filename, class_name = argv[1:]
+  source = utils.ReadFile(filename)
+  if source is None:
+    return 1
+
+  builder = ast.BuilderFromSource(source, filename)
+  try:
+    entire_ast = filter(None, builder.Generate())
+  except KeyboardInterrupt:
+    return
+  except:
+    # An error message was already printed since we couldn't parse.
+    pass
+  else:
+    _GenerateMock(filename, source, entire_ast, class_name)
+
+
+if __name__ == '__main__':
+  main(sys.argv)