Use t.Setenv instead of custom implementation (#34)

Follow up for #18. This function was introduced in go1.17. As of #19 we
require go1.18, so we can use it.

cmd/configure/configure_test.go

@@ -8,7 +8,6 @@ import (
 	"testing"
 
 	"github.com/databricks/bricks/cmd/root"
-	"github.com/databricks/bricks/tests"
 	"github.com/stretchr/testify/assert"
 	"gopkg.in/ini.v1"
 )
@@ -25,8 +24,8 @@ func setup(t *testing.T) string {
 	if runtime.GOOS == "windows" {
 		homeEnvVar = "USERPROFILE"
 	}
-	tests.SetTestEnv(t, homeEnvVar, tempHomeDir)
+	t.Setenv(homeEnvVar, tempHomeDir)
-	tests.SetTestEnv(t, "DATABRICKS_CONFIG_FILE", "")
+	t.Setenv("DATABRICKS_CONFIG_FILE", "")
 	return tempHomeDir
 }
 
@@ -74,7 +73,7 @@ func TestConfigFileFromEnvNoInteractive(t *testing.T) {
 	ctx := context.Background()
 	tempHomeDir := setup(t)
 	cfgFileDir := filepath.Join(tempHomeDir, "test")
-	tests.SetTestEnv(t, "DATABRICKS_CONFIG_FILE", cfgFileDir)
+	t.Setenv("DATABRICKS_CONFIG_FILE", cfgFileDir)
 
 	inp := getTempFileWithContent(t, tempHomeDir, "token\n")
 	oldStdin := os.Stdin

tests/utils.go

@@ -1,23 +0,0 @@
-package tests
-
-import (
-	"os"
-	"testing"
-
-	"github.com/stretchr/testify/assert"
-)
-
-func SetTestEnv(t *testing.T, key, value string) {
-	originalValue, isSet := os.LookupEnv(key)
-
-	err := os.Setenv(key, value)
-	assert.NoError(t, err)
-
-	t.Cleanup(func() {
-		if isSet {
-			os.Setenv(key, originalValue)
-		} else {
-			os.Unsetenv(key)
-		}
-	})
-}