implement testEnv for e2e tests

Signed-off-by: Chanwit Kaewkasi <chanwit@gmail.com>

Makefile

@@ -1,5 +1,6 @@
 VERSION?=$(shell grep 'VERSION' cmd/flux/main.go | awk '{ print $$4 }' | tr -d '"')
 EMBEDDED_MANIFESTS_TARGET=cmd/flux/manifests
+TEST_KUBECONFIG?=/tmp/flux-e2e-test-kubeconfig
 
 rwildcard=$(foreach d,$(wildcard $(addsuffix *,$(1))),$(call rwildcard,$(d)/,$(2)) $(filter $(subst *,%,$(2)),$(d)))
 
@@ -14,9 +15,41 @@ fmt:
 vet:
 	go vet ./...
 
+setup-envtest:
+ifeq (, $(shell which setup-envtest))
+	@{ \
+	set -e ;\
+	SETUP_ENVTEST_TMP_DIR=$$(mktemp -d) ;\
+	cd $$SETUP_ENVTEST_TMP_DIR ;\
+	go mod init tmp ;\
+	go get sigs.k8s.io/controller-runtime/tools/setup-envtest@latest ;\
+	rm -rf $$SETUP_ENVTEST_TMP_DIR ;\
+	}
+SETUP_ENVTEST=$(GOBIN)/setup-envtest
+else
+SETUP_ENVTEST=$(shell which setup-envtest)
+endif
+
+setup-kind:
+	kind create cluster --name=flux-e2e-test --kubeconfig=$(TEST_KUBECONFIG) --config=.github/kind/config.yaml
+	kubectl --kubeconfig=$(TEST_KUBECONFIG) apply -f https://docs.projectcalico.org/v3.16/manifests/calico.yaml
+	kubectl --kubeconfig=$(TEST_KUBECONFIG) -n kube-system set env daemonset/calico-node FELIX_IGNORELOOSERPF=true
+
+cleanup-kind:
+	kind delete cluster --name=flux-e2e-test
+	rm $(TEST_KUBECONFIG)
+
 test: $(EMBEDDED_MANIFESTS_TARGET) tidy fmt vet
 	go test ./... -coverprofile cover.out
 
+e2e: $(EMBEDDED_MANIFESTS_TARGET) tidy fmt vet
+	TEST_KUBECONFIG=$(TEST_KUBECONFIG) go test ./cmd/flux/... -coverprofile cover.out --tags=e2e -parallel=1
+
+test-with-kind: setup-envtest
+	make setup-kind
+	make e2e
+	make cleanup-kind
+
 $(EMBEDDED_MANIFESTS_TARGET): $(call rwildcard,manifests/,*.yaml *.json)
 	./manifests/scripts/bundle.sh