Finished all testing for set, get, and negate for registers

tests.py

@@ -1,5 +1,5 @@
 import random
-from unittest import TestCase
+from unittest import TestCase, main as unittest_main
 
 from register import Accumulator, Register
 
@@ -17,7 +17,7 @@ class TestSetterGetter(RegisterTest):
     def test_set(self):
         test_val = random.randint(0, 255)
         self.test_register.set(test_val)
-        self.assertEqual(test_register.value, test_val)
+        self.assertEqual(self.test_register.value, test_val)
 
     def test_set_overflow(self):
         test_val = random.randint(256, 1024)
@@ -25,14 +25,14 @@ class TestSetterGetter(RegisterTest):
         self.assertEqual(test_val % 256, self.test_register.value)
 
     def test_2s_complement(self):
-        test_val = -randint(0, 127)
+        test_val = -random.randint(0, 127)
         self.test_register.set(test_val)
         self.assertEqual(self.test_register.get_signed(), test_val)
 
     def test_2s_complement_overflow(self):
-        test_val = -randint(128, 1024)
+        test_val = -random.randint(128, 1024)
         self.test_register.set(test_val)
-        self.assertEqual(self.test_register.value, test_val % -128)
+        self.assertEqual(self.test_register.get_signed(), test_val % -128)
 
 
 class TestNegation(RegisterTest):
@@ -46,7 +46,7 @@ class TestNegation(RegisterTest):
         test_val = random.randint(128, 1024)
         self.test_register.set(test_val)
         self.test_register.negate()
-        self.assertEqual(self.test_register.get_signed())
+        self.assertEqual(self.test_register.get_signed(), -test_val % -128)
 
     def test_negate_negative(self):
 
@@ -59,33 +59,12 @@ class TestNegation(RegisterTest):
         test_val = -random.randint(128, 1024)
         self.test_register.set(test_val)
         self.test_register.negate()
-        self.assertEqual(self.test_register.get_signed())
+        self.assertEqual(self.test_register.get_signed(), -test_val % 128)
 
 
 class TestAritmetic(RegisterTest):
     pass
 
 
-@test
-def test_shift_right():
-    pass
-
-
-@test
-def test_shift_left():
-    pass
-
-
-@test
-def test_add():
-    pass
-
-
-@test
-def test_subtract():
-    pass
-
-
 if __name__ == "__main__":
-    for test_func in TESTS:
-        test_func()
+    unittest_main()