Add validation for Structured Event

Author: Shubham Gupta

lib/snowplow_tracker/events/structured.ex

@@ -81,6 +81,14 @@ defmodule SnowplowTracker.Events.Structured do
     raise Errors.InvalidParam, "action cannot be blank"
   end
 
+  def validate(%Structured{value: ""}) do
+    raise Errors.InvalidParam, "value cannot be blank"
+  end
+
+  def validate(%Structured{value: nil}) do
+    raise Errors.InvalidParam, "value cannot be blank"
+  end
+
   def validate(%Structured{} = event), do: event
 
   @spec get(t()) :: Payload.t()

test/snowplow_tracker/events/structured_test.exs

@@ -48,7 +48,7 @@ defmodule SnowplowTracker.Events.StructuredTest do
     end
 
     test "returns the event if it is valid" do
-      event = %Events.Structured{category: "animal", action: "pet"}
+      event = Events.Structured.new(%{category: "animal", action: "pet"})
       assert event == Events.Structured.validate(event)
     end
   end