py-test.mk: Add file

Add a dedicated py-test.mk for running tests with pytest instead of python.
The commit introduces a new variable PYTHON_RUNNER, which is then used by py-run.mk to do it's usual thing. Running pytest is similar enough to running Python programs to keep the rest of the machinery and prevent redundancy from creeping in.
Signed-off-by: Jan Lindemann <jan@janware.com>

make/py-run.mk

@@ -5,6 +5,7 @@ include $(JWBDIR)/make/py-defs.mk
 
 EXE                         ?= $(firstword $(wildcard main.py runme.py test.py *.py))
 EXE_ARGS                    ?=
+PYTHON_RUNNER               ?= $(PYTHON)
 
 all:
 install:
@@ -13,7 +14,7 @@ distclean:
 test: all
 
 run:
-	$(PYTHON) $(EXE) $(EXE_ARGS)
+	$(PYTHON_RUNNER) $(EXE) $(EXE_ARGS)
 
 run.sh:
 	echo -e "#!/bin/bash\n\nexport PYTHONPATH=$(PYTHONPATH)\nset -x\nexec $(PYTHON) $(EXE)" '"$$@"' > $@.tmp

make/py-test.mk

@@ -0,0 +1,6 @@
+PYTHON_RUNNER               ?= pytest -v
+
+include $(JWBDIR)/make/py-run.mk
+
+all:
+test: run