Fix unstable tests

Makefile

@@ -36,7 +36,7 @@ test: deps
 
 .PHONY: testacc
 testacc: deps
-	TEST_ACC=1 go test -count=1 ./...
+	TEST_ACC=1 go test -count=1 -failfast ./...
 
 .PHONY: check
 check: lint vet test build

docker-compose.yml

@@ -10,6 +10,9 @@ services:
     environment:
       CGO_ENABLED: 0 # disable cgo for go test
       LOCALSTACK_ENDPOINT: "http://localstack:4566"
+      # Use the same filesystem to avoid a checksum mismatch error
+      # or a file busy error caused by asynchronous IO.
+      TF_PLUGIN_CACHE_DIR: "/tmp/plugin-cache"
     depends_on:
       - localstack
 

tfexec/test_helper.go

@@ -299,6 +299,14 @@ func SetupTestAccWithApply(t *testing.T, source string) TerraformCLI {
 		t.Fatalf("failed to run terraform apply: %s", err)
 	}
 
+	// destroy resources after each test not to have any state.
+	t.Cleanup(func() {
+		err := tf.Destroy(ctx, "", "-input=false", "-no-color", "-auto-approve")
+		if err != nil {
+			t.Fatalf("failed to run terraform destroy: %s", err)
+		}
+	})
+
 	return tf
 }
 

tfmigrate/state_import_action_test.go

@@ -49,4 +49,9 @@ resource "aws_iam_user" "baz" {
 	if err != nil {
 		t.Fatalf("failed to run migrator plan: %s", err)
 	}
+
+	err = m.Apply(ctx)
+	if err != nil {
+		t.Fatalf("failed to run migrator apply: %s", err)
+	}
 }