Reflect wrapped __new__ logic in __new__ test

nogil_test/cypclass_test___new__.pyx

@@ -11,6 +11,30 @@ cdef cypclass SomeMemory:
     o.a = -2
     return o
 
+
+  void __init__(self):
+    this.a += 1
+
+  void __init__(self, int a):
+    pass
+
+  void __init__(self, int a, int b, int c, int d = 21, int e = 31):
+    self.a = e
+
+cdef cypclass SomeArgUnpacking:
+  int a
+
+  SomeArgUnpacking __new__(f, int a, int b, int c, int d = 21, int e = 31):
+    o = f()
+    return o
+
+  void __init__(self, int a, int b, int c=2, int d=4, int e = 32, int g = 65):
+    self.a = e
+
+
+cdef cypclass SomeNewTrick:
+  int a
+
   void* __new__(f, int a):
     o = f()
     o.a = a
@@ -20,40 +44,30 @@ cdef cypclass SomeMemory:
     Cy_INCREF(<CyObject*>o)
     return <void*> o
 
-  double __new__(unused, int a, double b):
-    return a*b
-
-  SomeMemory __new__(f, int a, int b, int c=2, int d=4, int e = 32, int g = 65):
-    o = f()
-    return o
-
-  SomeMemory __alloc__():
-      return new SomeMemory()
+  void __init__(self, int a, int b, int c, int d = 21, int e = 31):
+    self.a = e
 
-  void __init__(self):
-    this.a += 1
 
-  void __init__(self, int a):
-    pass
+cdef cypclass SomeNotInstanciable:
+  double __new__(unused, int a, double b):
+    return a*b
 
-  void __init__(self, int a, int b, int c, int d = 21, int e = 31):
-    self.a = e
 
 cdef int foo():
   o = SomeMemory()
   return o.a
 
 cdef int bar():
-  o = SomeMemory(3)
+  o = <SomeNewTrick> SomeNewTrick(3)
   return o.a
 
 cdef int baz():
-  o = SomeMemory(3, 2, 1, 0)
+  o = SomeArgUnpacking(3, 2, 1, 0)
   return o.a
 
 cdef double baa():
-  o = SomeMemory.__new__(SomeMemory.__alloc__, 2, 3.4)
-  o = SomeMemory.__new__(NULL, 2, 3.4)
+  o = SomeNotInstanciable.__new__(SomeNotInstanciable.__alloc__, 2, 3.4)
+  o = SomeNotInstanciable.__new__(NULL, 2, 3.4)
   return o
 
 cpdef bag():