feat(flagd): add graceful attempts

Signed-off-by: Simon Schrottner <simon.schrottner@dynatrace.com>

providers/openfeature-provider-flagd/tests/e2e/events.feature

@@ -0,0 +1,29 @@
+Feature: flagd providers
+
+  # This test suite contains scenarios to test flagd providers.
+  # It's associated with the flags configured in flags/changing-flag.json and flags/zero-flags.json.
+  # It should be used in conjunction with the suites supplied by the OpenFeature specification.
+
+  Background:
+    Given a flagd provider is set
+
+  # events
+  Scenario Outline: Provider events
+    When a <event> handler is added
+    Then the <event> handler must run
+    Examples:
+      | event                          |
+      | PROVIDER_ERROR                 |
+      | PROVIDER_STALE                 |
+      | PROVIDER_READY                 |
+
+  # events
+  Scenario: Provider events chain ready -> stale -> error -> ready
+    When a PROVIDER_READY handler is added
+    Then the PROVIDER_READY handler must run
+    When a PROVIDER_STALE handler is added
+    Then the PROVIDER_STALE handler must run
+    When a PROVIDER_ERROR handler is added
+    Then the PROVIDER_ERROR handler must run
+    When a PROVIDER_READY handler is added
+    Then the PROVIDER_READY handler must run