Run tests in parallel

Makefile

@@ -25,7 +25,7 @@ lint:
 
 .PHONY: test
 test:
-	go test ./...
+	go test ./... -race -shuffle=on
 
 .PHONY: container
 container:

client/nginx_test.go

@@ -8,6 +8,8 @@ import (
 const validStabStats = "Active connections: 1457 \nserver accepts handled requests\n 6717066 6717066 65844359 \nReading: 1 Writing: 8 Waiting: 1448 \n"
 
 func TestParseStubStatsValidInput(t *testing.T) {
+	t.Parallel()
+
 	tests := []struct {
 		input          []byte
 		expectedResult StubStats

collector/helper_test.go

@@ -6,6 +6,8 @@ import (
 )
 
 func TestMergeLabels(t *testing.T) {
+	t.Parallel()
+
 	tests := []struct {
 		name             string
 		mapA, mapB, want map[string]string

exporter_test.go

@@ -8,6 +8,8 @@ import (
 )
 
 func TestCreateClientWithRetries(t *testing.T) {
+	t.Parallel()
+
 	type args struct {
 		client        interface{}
 		err           error
@@ -83,6 +85,8 @@ func TestCreateClientWithRetries(t *testing.T) {
 }
 
 func TestParsePositiveDuration(t *testing.T) {
+	t.Parallel()
+
 	tests := []struct {
 		name      string
 		testInput string
@@ -123,6 +127,8 @@ func TestParsePositiveDuration(t *testing.T) {
 }
 
 func TestParseUnixSocketAddress(t *testing.T) {
+	t.Parallel()
+
 	tests := []struct {
 		name            string
 		testInput       string
@@ -177,6 +183,8 @@ func TestParseUnixSocketAddress(t *testing.T) {
 }
 
 func TestParseConstLabels(t *testing.T) {
+	t.Parallel()
+
 	tests := []struct {
 		name    string
 		labels  string