added properties tests

dabrahams · dabrahams · commit d482d5768906 · 2003-08-11T14:30:04.000Z
[SVN r19532]
diff --git a/test/properties.cpp b/test/properties.cpp
@@ -0,0 +1,60 @@
+#include <boost/python.hpp>
+
+using namespace boost::python;
+
+struct X
+{
+    X( int value ) : m_value( value )
+    { ++s_count; }
+    
+    X( const X &other ) : m_value( other.m_value )
+    { ++s_count; }
+    
+    ~X() 
+    { --s_count; }
+        
+    int get_value() const
+    { return m_value; }
+    
+    void set_value(int new_value)
+    { m_value = new_value; }
+    
+    static int get_instance_count()
+    { return s_count; }
+        
+    int m_value;
+
+    static int s_count;
+};
+
+int X::s_count = 0;
+
+int get_X_instance_count()
+{ return X::get_instance_count(); }
+
+
+
+BOOST_PYTHON_MODULE(properties_ext)
+{
+    typedef return_value_policy<return_by_value> return_by_value_t;
+    typedef return_internal_reference<> return_by_internal_reference_t;
+    class_<X>("X", init<int>() )
+        //defining read only property
+        .add_property( "value_r", &X::get_value )
+        //defining read \ write property 
+        .add_property( "value_rw", &X::get_value, &X::set_value )
+        //defining read \ write property using make_getter and make_setter
+        .add_property( "value_direct", 
+                        make_getter( &X::m_value, return_by_value_t() ),
+                        make_setter( &X::m_value, return_by_internal_reference_t() ) )
+        //defining read only property for static member
+        .add_static_property( "instance_count", &X::get_instance_count )
+        //defining read \ write property for static member using make_getter and make_setter
+        .add_static_property( "instance_count_direct", 
+                              make_getter( &X::s_count, return_by_value_t() ), 
+                              make_setter( &X::s_count, return_by_internal_reference_t() ) )
+        //defining class property using a global function
+        .add_static_property( "instance_count_injected", &get_X_instance_count );
+}
+
+#include "module_tail.cpp"
diff --git a/test/properties.py b/test/properties.py
@@ -0,0 +1,88 @@
+"""
+This is test module for properies.
+
+>>> X = properties.X
+
+>>> x1 = X(1)
+
+value read only
+>>> x1.value_r
+1
+
+value read - write
+>>> x1.value_rw
+1
+
+value direct access
+>>> x1.value_direct
+1
+
+class instance count read - only
+>>> X.instance_count
+1
+
+class instance count direct
+>>> X.instance_count_direct
+1
+
+class instance count injected
+>>> X.instance_count_injected
+1
+
+class instance count from object
+>>> x1.instance_count
+1
+
+class instance count from object
+>>> x1.instance_count_direct
+1
+
+class instance count from object: 
+>>> x1.instance_count_injected
+1
+
+as expected you can't assign new value to read only property
+>>> x1.value_r = 2
+Traceback (most recent call last):
+  File "properties.py", line 49, in ?
+    x1.value_r = 2
+AttributeError: can't set attribute
+
+setting value_rw to 2. value_direct: 
+>>> x1.value_rw = 2
+>>> x1.value_rw
+2
+
+setting value_direct to 3. value_direct: 
+>>> x1.value_direct = 3
+>>> x1.value_direct
+3
+
+>>> assert x1.value_r == 3
+
+>>> x2 = X(2)
+
+after creating second intstance of X instances count is 2
+>>> x2.instance_count
+2
+
+>>> del x2
+>>> assert x1.instance_count == 1
+"""
+
+#import sys; sys.path.append(r'P:\Actimize4.0\smart_const\py_smart_const___Win32_Debug')
+import properties_ext as properties
+
+
+def run(args = None):
+    import sys
+    import doctest
+
+    if args is not None:
+        sys.argv = args
+    return doctest.testmod(sys.modules.get(__name__))
+    
+if __name__ == '__main__':
+    print "running..."
+    import sys
+    sys.exit(run()[0])
