Expand and correct

Makefile

@@ -38,7 +38,7 @@ install:
 	$(PYTHON) setup.py install
 
 # Run tests
-check: pytest doctest
+check: pytest
 
 #: Remove derived files
 clean: clean-pyc
@@ -52,14 +52,6 @@ pytest:
 	py.test test $o
 
 
-# #: Create data that is used to in Django docs and to build TeX PDF
-# doc-data mathics/doc/tex/data: mathics/builtin/*.py mathics/doc/documentation/*.mdoc mathics/doc/documentation/images/*
-# 	$(PYTHON) mathics/test.py -ot -k
-
-#: Run tests that appear in docstring in the code.
-doctest:
-	$(PYTHON) mathics/test.py $o
-
 # #: Make Mathics PDF manual
 # doc mathics.pdf: mathics/doc/tex/data
 # 	(cd mathics/doc/tex && $(MAKE) mathics.pdf)

README.rst

@@ -25,7 +25,7 @@ Then to the function ``Pymathics\`Hello[]`` and the variable ``PyMathics\`$Hello
       In[1]:= LoadModule["pymathics.hello"]
       Out[1]= pymathics.hello
 
-      In[2]:= PyMathics`Hello["World"]
+      In[2]:= Hello["World"]
       Out[2]:= Hello, World!
 
       In[3]:= PyMathics`$HelloUser

pymathics/hello/__init__.py

@@ -19,15 +19,14 @@
 
    ::
 
-   In[2]:= PyMathics`Hello["World"]
+   In[2]:= Hello["World"]
    Out[2]:= Hello, World!
 
    In[3]:= PyMathics`$HelloUser
    Out[3]:= $your-login-name$
 
 """
 
-import os
 from pymathics.hello.version import __version__
 from pymathics.hello.__main__ import Hello # noqa
 

pymathics/hello/__main__.py

@@ -7,10 +7,16 @@ class Hello(Builtin):
       <dt>'Hello'[$person$]
       <dd>An example function in a Python-importable Mathics module.
     </dl>
-    >> PyMathics`Hello["World"]
+    >> Hello["World"]
      = Hello, World!
     """
 
-    def apply(self, person, evaluation):
-        "PyMathics`Hello[person_]"
+    # The function below should start with "apply"
+    def apply_with_name(self, person, evaluation):
+        "%(name)s[person_String]"
+        # %(name)s is just a more flexible way of writing "Hello".
+        # If the class name changes, so will the above pattern.
+        # The above pattern matches Hello with a single string argument.
+        # See https://reference.wolfram.com/language/tutorial/Patterns.html#7301
+        # and https://reference.wolfram.com/language/ref/Cases.html
         return String("Hello, %s!" % person.get_string_value())

pymathics/hello/version.py

@@ -1,8 +1,7 @@
-#!/usr/bin/env python3
 # -*- coding: utf-8 -*-
 
 
 # This file is suitable for sourcing inside POSIX shell as
 # well as importing into Python. That's why there is no
 # space around "=" below.
-__version__="1.0.0"
+__version__="1.0.1.dev0"  # noqa

setup.py

@@ -3,7 +3,6 @@
 
 import sys
 import platform
-import os
 from setuptools import setup, find_namespace_packages
 
 # Ensure user has the correct Python version
@@ -20,7 +19,7 @@
     name="pymathics-hello",
     version=__version__,
     packages=find_namespace_packages(include=["pymathics.*"]),
-    install_requires=["mathics3>=1.1.0"],
+    install_requires=["Mathics3>=1.1.0"],
     # don't pack Mathics in egg because of media files, etc.
     zip_safe=False,
     # metadata for upload to PyPI

test/test_hello.py

@@ -0,0 +1,18 @@
+from mathics.session import MathicsSession
+
+session = MathicsSession(add_builtin=True, catch_interrupt=False)
+
+def check_evaluation(str_expr: str, expected: str, message=""):
+    """Helper function to test that a WL expression against
+    its results"""
+    result = session.evaluate(str_expr).value
+
+    if message:
+        assert result == expected, "%s: got: %s" % (message, result)
+    else:
+        assert result == expected
+
+
+def test_hello():
+    session.evaluate('LoadModule["pymathics.hello"]') == "pymathics.hello"
+    check_evaluation('Hello["World"]', "Hello, World!")