make test → test_local, test_docker, test_dind

test_local: run `bats tests/`. Requires `bats`.

test_docker: run docker and install bats in it.

Both of these options require that your local Docker daemon is running
in swarm mode.

test_dind: starts a Docker daemon and runs tests in that. Requires sudo

Makefile

@@ -1,6 +1,21 @@
 .PHONY: test shellcheck docopt kcov codecov
 
-test:
+test_dind:
+	@sudo DOCKER_CONTEXT=default docker run \
+		-v $$(pwd):/workdir \
+		--privileged \
+		-d \
+		--name=abra-test-dind \
+		-e DOCKER_TLS_CERTDIR="" \
+		docker:dind
+	@DOCKER_CONTEXT=default docker exec \
+		-it \
+		abra-test-dind \
+		sh -c "apk add bats git bash && cd /workdir && bats /workdir/tests"
+	@DOCKER_CONTEXT=default docker stop abra-test-dind
+	@DOCKER_CONTEXT=default docker rm abra-test-dind
+
+test_docker:
 	@DOCKER_CONTEXT=default docker run \
 		-it \
 		--rm \
@@ -8,6 +23,9 @@ test:
 		docker:dind \
 		sh -c "apk add bats git bash && cd /workdir && bats /workdir/tests"
 
+test_local:
+	bats tests
+
 shellcheck:
 	@docker run \
 		-it \