Choose a version from an API base endpoint.
diff --git a/openstack/utils/choose_version_test.go b/openstack/utils/choose_version_test.go
new file mode 100644
index 0000000..a252790
--- /dev/null
+++ b/openstack/utils/choose_version_test.go
@@ -0,0 +1,57 @@
+package utils
+
+import (
+ "fmt"
+ "net/http"
+ "testing"
+
+ "github.com/rackspace/gophercloud/testhelper"
+)
+
+func TestChooseVersion(t *testing.T) {
+ testhelper.SetupHTTP()
+ defer testhelper.TeardownHTTP()
+
+ testhelper.Mux.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
+ fmt.Fprintf(w, `
+ {
+ "versions": {
+ "values": [
+ {
+ "status": "stable",
+ "id": "v3.0",
+ "links": [
+ { "href": "https://example.com:1000/", "rel": "self" }
+ ]
+ },
+ {
+ "status": "stable",
+ "id": "v2.0",
+ "links": [
+ { "href": "https://example.com:2000/", "rel": "self" }
+ ]
+ }
+ ]
+ }
+ }
+ `)
+ })
+
+ v2 := &Version{ID: "v2.0", Priority: 2}
+ v3 := &Version{ID: "v3.0", Priority: 3}
+
+ v, endpoint, err := ChooseVersion(testhelper.Endpoint(), []*Version{v2, v3})
+
+ if err != nil {
+ t.Fatalf("Unexpected error from ChooseVersion: %v", err)
+ }
+
+ if v != v3 {
+ t.Errorf("Expected %#v to win, but %#v did instead", v3, v)
+ }
+
+ expected := "https://example.com:1000/"
+ if endpoint != expected {
+ t.Errorf("Expected endpoint [%s], but was [%s] instead", expected, endpoint)
+ }
+}