Allow for easy execution of individual tests

Occasionally running the entire test suite is too much overhead or takes too long, for instance, while working on an individual test. In such cases, what is desired ideally is to be able to run a single test case by means of a single memorable command. This change adjusts our makefile to support such cases by treating every command not otherwise defined as the individual test case to execute.

Author: d-e-s-o

btrfs-backup/Makefile

@@ -1,7 +1,7 @@
 # Makefile
 
 #/***************************************************************************
-# * Copyright (C) 2014-2015 Daniel Mueller (deso@posteo.net) *
+# * Copyright (C) 2014-2016 Daniel Mueller (deso@posteo.net) *
 # * *
 # * This program is free software: you can redistribute it and/or modify *
 # * it under the terms of the GNU General Public License as published by *
@@ -18,15 +18,24 @@
 # ***************************************************************************/
 
 ROOT := $(shell pwd)/..
+PYTHONPATH := "$(ROOT)/cleanup/src:$(ROOT)/execute/src:$(ROOT)/btrfs-backup/src:${PYTHONPATH}"
 
 
 .PHONY: test
 test:
-@PYTHONPATH="$(ROOT)/cleanup/src:$(ROOT)/execute/src:$(ROOT)/btrfs-backup/src:${PYTHONPATH}"\
+@PYTHONPATH="$(PYTHONPATH)"\
  PYTHONDONTWRITEBYTECODE=1\
 python -m unittest --verbose --buffer deso.btrfs.test.allTests
 
 
+.PHONY: %
+%:
+@echo "Running deso.btrfs.test.$@ ..."
+@PYTHONPATH="$(PYTHONPATH)"\
+ PYTHONDONTWRITEBYTECODE=1\
+python -m unittest --verbose --buffer deso.btrfs.test.$@
+
+
 ifneq (,$(filter testSetup testAll,$(MAKECMDGOALS)))
 .PHONY: testSetup
 # TODO: At the moment we do not delete the directory because it is full
@@ -35,7 +44,7 @@ ifneq (,$(filter testSetup testAll,$(MAKECMDGOALS)))
 testSetup: DIR := $(shell mktemp --directory --quiet)
 testSetup:
 @git clone --quiet $(ROOT) $(DIR)
-@(export PYTHONPATH="$(DIR)/cleanup/src:$(DIR)/execute/src/:$(DIR)/btrfs-backup/src:${PYTHONPATH}";\
+@(export PYTHONPATH="$(PYTHONPATH)";\
  cd $(DIR)/btrfs-backup &&\
  python setup.py --version > /dev/null &&\
  python setup.py --description > /dev/null &&\