Change how python tests are executed

Require them to have assert rather than testing the
result variables set.

This makes for way simpler code.

Now also prints stacktrace to know where the problem occurred.

driver.py

@@ -19,6 +19,8 @@
 
 import os
 from sys import exit
+import sys
+import traceback
 
 from relational import relation, parser, optimizer
 from xtermcolor import colorize
@@ -85,9 +87,9 @@ def execute_tests():
                 py_good += 1
             else:
                 py_bad += 1
-        elif i.endswith('.exec'):
+        elif i.endswith('.py'):
             ex_tot += 1
-            if run_exec_test(i[:-5]):
+            if run_exec_test(i[:-3]):
                 ex_good += 1
             else:
                 ex_bad += 1
@@ -128,34 +130,18 @@ def run_exec_test(testname):
     glob = rels.copy()
     exp_result = {}
 
+    expr = readfile('%s%s.py' % (tests_path, testname))
+
     try:
-        expr = readfile('%s%s.exec' % (tests_path, testname))
-        try:
-            exec(expr, glob)  # Evaluating the expression
-        except Exception as e:
-            print (e)
-            raise Exception("")
-
-        expr = readfile('%s%s.result' % (tests_path, testname))
-        exp_result = eval(expr, rels)  # Evaluating the expression
-
-        if isinstance(exp_result, dict):
-            fields_ok = True
-
-            for i in exp_result:
-                fields_ok = fields_ok and glob[i] == exp_result[i]
-
-            if fields_ok:
-                print (colorize('Test passed', COLOR_GREEN))
-                return True
-    except:
-        pass
-    print (colorize('ERROR', COLOR_RED))
-    print (colorize('=====================================', COLOR_RED))
-    print ("Expected %s" % exp_result)
-    # print ("Got %s" % glob)
-    print (colorize('=====================================', COLOR_RED))
-    return False
+        exec(expr, glob)  # Evaluating the expression
+        print (colorize('Test passed', COLOR_GREEN))
+        return True
+    except Exception as e:
+        print (colorize('ERROR', COLOR_RED))
+        print (colorize('=====================================', COLOR_RED))
+        traceback.print_exc(file=sys.stdout)
+        print (colorize('=====================================', COLOR_RED))
+        return False
 
 
 def run_py_test(testname):

test/rename_insert1.py

@@ -1,5 +1,4 @@
 p1=people.rename({"id":"ido"})
 people.insert((123,"lala",0,31))
-
-retval=people==p1
+assert people!=p1
 people.delete("id==123")

test/rename_insert1.result

@@ -1 +0,0 @@
-{'retval':False}

test/rename_insert2.py

@@ -1,5 +1,4 @@
 p1=people.rename({"id":"ido"})
 p1.insert((123,"lala",0,31))
-
-retval=people==p1
+assert people!=p1
 people.delete("id==123")

test/rename_insert2.result

@@ -1 +0,0 @@
-{'retval':False}