vm: Tests for STORE_ATTR, LOAD_ATTR, DELETE_ATTR

Author: ncw

notes.txt

@@ -33,15 +33,29 @@ astyle --style=java --add-brackets < x.c > x.go
 
 Roadmap
 =======
-  * make pystone.py work
+  * make pystone.py work - DONE
   * make enough of internals work so can run python tests
   * import python tests and write go test runner to run them
   * make lots of them pass
 
+
+Exceptions
+==========
+
+Currently uses a panic/recover mechanism
+
+Change to an error passing mechanism using go error type (so can use go vet etc to check)
+
+panic/recover only within single modules (like compiler/parser)
+
 Missing parts
 =============
   * repr/str
   * subclassing built in types
+  * integers > 64 bit
+    * make py.Int be a wrapper for int
+    * make it promote to py.BigInt
+  * StringDict vs Dict
 
 Polymorphism
 ============
@@ -170,7 +184,9 @@ Introspection idea
 Parser
 ======
 
-Use Python's Grammar file - converted into parser/grammar.y
+Used Python's Grammar file - converted into parser/grammar.y
+
+Used go tool yacc and a hand built lexer in parser/lexer.go
 
-Use go tool yacc and a hand built lexer in parser/lexer.go
+DONE
 

vm/tests/attr.py

@@ -0,0 +1,37 @@
+#!/usr/bin/env python3.4
+
+class C:
+    attr1 = 42
+    def __init__(self):
+        self.attr2 = 43
+        self.attr3 = 44
+c = C()
+
+# Test LOAD_ATTR
+assert c.attr1 == 42
+assert C.attr1 == 42
+assert c.attr2 == 43
+assert c.attr3 == 44
+
+# Test DELETE_ATTR
+del c.attr3
+
+# FIXME - exception handling broken
+# ok = False
+# try:
+#     c.attr3
+# except AttributeError:
+#     ok = True
+# assert ok
+
+# Test STORE_ATTR
+c.attr1 = 100
+c.attr2 = 101
+c.attr3 = 102
+assert c.attr1 == 100
+assert C.attr1 == 42
+assert c.attr2 == 101
+assert c.attr3 == 102
+
+# End with this
+finished = True