Run Julia tests on "make test"

Makefile

@@ -1,14 +1,15 @@
 PYTEST_ARGS := -W ignore::DeprecationWarning -vv -x --log-level=DEBUG
+JULIA := julia --color=yes --project=src/julia
 
 all: docs test
 
 develop:
 	cd src/python && python setup.py develop
-	julia --project=src/julia -e "using Pkg; Pkg.instantiate()"
+	$(JULIA) -e "using Pkg; Pkg.instantiate()"
 
 install:
 	cd src/python && python setup.py install
-	julia --project=src/julia -e "using Pkg; Pkg.instantiate()"
+	$(JULIA) -e "using Pkg; Pkg.instantiate()"
 
 uninstall:
 	pip uninstall miplearn
@@ -16,10 +17,15 @@ uninstall:
 docs:
 	mkdocs build
 
-test:
+test: test-python test-julia
+
+test-python:
 	cd src/python && pytest $(PYTEST_ARGS)
 
+test-julia:
+	$(JULIA) -e 'using Pkg; Pkg.test("MIPLearn")'
+
 test-watch:
 	cd src/python && pytest-watch -- $(PYTEST_ARGS)
 
-.PHONY: test test-watch docs
+.PHONY: test test-python test-julia test-watch docs