Added unit tests for Getal&Ruimte book 1 chapter 8.

tests/test_b1_ch8.py

@@ -0,0 +1,21 @@
+import unittest
+
+from src.parser import Parser
+from src.node import ExpressionNode as N, ExpressionLeaf as L
+from tests.parser import ParserWrapper, run_expressions
+
+
+class TestB1Ch8(unittest.TestCase):
+
+    def test_diagnostic_test(self):
+        run_expressions(Parser, [
+            ('6*5^2', N('*', L(6), N('^', L(5), L(2)))),
+            ('-5*(-3)^2', N('*', N('-', L(5)),
+                                 N('^', N('-', L(3)), L(2)))),
+            ('-5*(-3)^2', N('*', N('-', L(5)),
+                                 N('^', N('-', L(3)), L(2)))),
+            ('7p-3p', N('-', N('*', L(7), L('p')), N('*', L(3), L('p')))),
+            ('-5a*-6', N('*', N('-', L(5)), L('a'), N('-', L(6)))),
+            ('3a-8--5-2a', N('-', N('*', L(3), L('a')), L(8),
+                                  N('-', L(5)), N('*', L(2), L('a')))),
+            ])