Add convenient make target "acceptance" for tests

This automatically starts docker and everything and tests it.

GNUmakefile

@@ -3,6 +3,7 @@ GOFMT_FILES?=$$(find . -name '*.go' |grep -v vendor)
 WEBSITE_REPO=github.com/hashicorp/terraform-website
 PKG_NAME=mysql
 TERRAFORM_VERSION=0.14.7
+TEST_PASSWORD=my-secret-pw
 
 default: build
 
@@ -22,6 +23,18 @@ bin/terraform:
 testacc: fmtcheck bin/terraform
 	PATH="$(CURDIR)/bin:${PATH}" TF_ACC=1 go test $(TEST) -v $(TESTARGS) -timeout=30s
 
+acceptance: testversion5.6 testversion5.7 testversion8.0
+
+testversion%:
+	$(MAKE) MYSQL_VERSION=$* MYSQL_PORT=33$(shell echo "$*" | tr -d '.') testversion
+
+testversion:
+	-docker run --rm --name test-mysql$(MYSQL_VERSION) -e MYSQL_ROOT_PASSWORD="$(TEST_PASSWORD)" -d -p $(MYSQL_PORT):3306 mysql:$(MYSQL_VERSION)
+	@while ! mysql -h 127.0.0.1 -P $(MYSQL_PORT) -p"$(TEST_PASSWORD)" -u root -e 'SELECT 1'; do echo 'Waiting for MySQL...'; sleep 1; done
+	-mysql -h 127.0.0.1 -u root -P $(MYSQL_PORT) -p"$(TEST_PASSWORD)" -e "INSTALL PLUGIN mysql_no_login SONAME 'mysql_no_login.so';"
+	MYSQL_PASSWORD="$(TEST_PASSWORD)" MYSQL_ENDPOINT=127.0.0.1:$(MYSQL_PORT) $(MAKE) testacc
+	docker rm -f test-mysql$(MYSQL_VERSION)
+
 vet:
 	@echo "go vet ."
 	@go vet $$(go list ./... | grep -v vendor/) ; if [ $$? -eq 1 ]; then \

README.md

@@ -82,12 +82,7 @@ $ make testacc
 If you want to run the Acceptance tests on your own machine with a MySQL in Docker:
 
 ```bash
-$ docker run --rm --name some-mysql -e MYSQL_ROOT_PASSWORD=my-secret-pw -d -p 3306:3306 mysql:5.7
-$ # wait for a few seconds to let MySQL stand up, check the logs with: docker logs -f some-mysql
-$ export MYSQL_USERNAME=root
-$ export MYSQL_ENDPOINT=localhost:3306
-$ export MYSQL_PASSWORD=my-secret-pw
-$ mysql -h 127.0.0.1 -u root -p"${MYSQL_PASSWORD}" -e "INSTALL PLUGIN mysql_no_login SONAME 'mysql_no_login.so';"
-$ make testacc
-$ docker rm -f some-mysql
+make acceptance
+# or to test only one mysql version:
+make testversion8.0
 ```