Forgot a test for tag, added it

model/tag_test.go

@@ -115,6 +115,36 @@ func TestTag(t *testing.T) {
 		testTag = tag
 	})
 
+	t.Run("Update", func(t *testing.T) {
+		if testTag == nil {
+			t.Error("No tag to modify")
+			t.Fail()
+			return
+		}
+
+		testTag.Type = "Character"
+		testTag.Name = "Urdnot Sild"
+
+		err := testTag.Update()
+		if err != nil {
+			t.Error("Modify failed:", err)
+			t.Fail()
+		}
+
+		tag, err := FindTag("name", name)
+		if err != nil && err.Error() != "not found" {
+			t.Log("Failed to get tags:", err)
+			t.Fail()
+		}
+		if tag != nil {
+			t.Log("Tag found by old name")
+			t.Fail()
+			return
+		}
+
+		name = testTag.Name
+	})
+
 	t.Run("FindByName", func(t *testing.T) {
 		tag, err := FindTag("name", name)
 		if err != nil {