feat: add basic gherkin test suite for tracking

specification/assets/gherkin/tracking.feature

@@ -0,0 +1,22 @@
+Feature: Tracking
+
+# This test suite contains scenarios to test the tracking API.
+
+  Background:
+    Given a provider is registered
+
+  Scenario Outline: Invalid event names
+    When an event was tracked with tracking event name <event_name>
+    Then nothing should have been tracked
+    And the tracking operation shall error
+    Examples: Basic
+      | event_name |
+      | ""         |
+      | "NULL"     |
+
+  Scenario Outline: Provider's track functionality is called
+    When an event was tracked with tracking event name <event_name>
+    Then the tracking provider should have been called with event name <event_name>
+    Examples: Basic
+      | event_name  |
+      | "the-events" |