Beef up tests; remove non-working "make install"

Author: rocky

Makefile

@@ -37,10 +37,6 @@ pypi-setup:
 develop: pypi-setup
 	$(PIP) install -e .
 
-#: Install mathics
-install:
-	$(PYTHON) setup.py install
-
 # Run tests
 check: pytest
 

test/test_hello.py

@@ -8,17 +8,24 @@
 session = MathicsSession(character_encoding="ASCII")
 
 
-def check_evaluation(str_expr: str, expected: str, message=""):
-    """Helper function to test that a Mathics expression against
+def check_evaluation(str_expr: str, expected: str, assert_message=""):
+    """Helper function to test that a Mathics3 expression against
     its results"""
     result = session.evaluate(str_expr).value
 
-    if message:
-        assert result == expected, f"{message}: got: {result}"
+    if assert_message:
+        print(f"got: {result}, expect: {expected} -- {assert_message}")
+        assert result == expected, assert_message
+    else:
+        print(f"got: {result}, expect: {expected}")
+
+    if assert_message:
+        assert result == expected, f"{assert_message}: got: {result}"
     else:
         assert result == expected
 
 
 def test_hello():
     session.evaluate('LoadModule["pymathics.hello"]') == "pymathics.hello"
-    check_evaluation('Hello["World"]', "Hello, World!")
+    check_evaluation('Hello["everyone"]', "Hello, everyone!")
+    check_evaluation("Hello[]", "Hello, World!")