registry/endpoint: make it testable

Signed-off-by: Vincent Batts <vbatts@redhat.com>

docs/endpoint_test.go

@@ -0,0 +1,27 @@
+package registry
+
+import "testing"
+
+func TestEndpointParse(t *testing.T) {
+	testData := []struct {
+		str      string
+		expected string
+	}{
+		{IndexServerAddress(), IndexServerAddress()},
+		{"http://0.0.0.0:5000", "http://0.0.0.0:5000/v1/"},
+		{"0.0.0.0:5000", "https://0.0.0.0:5000/v1/"},
+	}
+	for _, td := range testData {
+		e, err := newEndpoint(td.str)
+		if err != nil {
+			t.Errorf("%q: %s", td.str, err)
+		}
+		if e == nil {
+			t.Logf("something's fishy, endpoint for %q is nil", td.str)
+			continue
+		}
+		if e.String() != td.expected {
+			t.Errorf("expected %q, got %q", td.expected, e.String())
+		}
+	}
+}