FIX #2171 Fix faulty flag and add tests for SetConfigFromFlags

Signed-off-by: David Gageot <david@gageot.net>

drivers/openstack/openstack_test.go

@@ -0,0 +1,29 @@
+package openstack
+
+import (
+	"testing"
+
+	"github.com/docker/machine/libmachine/drivers"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestSetConfigFromFlags(t *testing.T) {
+	driver := NewDriver("default", "path")
+
+	checkFlags := &drivers.CheckDriverOptions{
+		FlagsValues: map[string]interface{}{
+			"openstack-auth-url":  "http://url",
+			"openstack-username":  "user",
+			"openstack-password":  "pwd",
+			"openstack-tenant-id": "ID",
+			"openstack-flavor-id": "ID",
+			"openstack-image-id":  "ID",
+		},
+		CreateFlags: driver.GetCreateFlags(),
+	}
+
+	err := driver.SetConfigFromFlags(checkFlags)
+
+	assert.NoError(t, err)
+	assert.Empty(t, checkFlags.InvalidFlags)
+}