test(campaign): add simple announcement acceptance fixture

examples/simple-announcement/campaign.json

@@ -0,0 +1,54 @@
+{
+  "version": "1.0",
+  "campaign": {
+    "id": "simple-announcement",
+    "name": "Simple announcement",
+    "description": "Credential-free release fixture for Campaign validation and message building.",
+    "mode": "test"
+  },
+  "fields": [
+    {
+      "name": "display_name",
+      "type": "string",
+      "label": "Display name",
+      "required": true
+    }
+  ],
+  "recipients": {
+    "from": [
+      {
+        "email": "announcements@example.test",
+        "name": "GovOPlaN Example",
+        "type": "to"
+      }
+    ],
+    "allow_individual_to": true
+  },
+  "template": {
+    "subject": "Planned service maintenance for ${display_name}",
+    "text": "Hello ${display_name},\n\nThe example service will be unavailable during the announced maintenance window.\n\nThis message was built locally and was not sent.\n",
+    "body_mode": "text"
+  },
+  "attachments": {
+    "base_path": ".",
+    "send_without_attachments_behavior": "continue",
+    "global": []
+  },
+  "entries": {
+    "inline": [
+      {
+        "id": "example-recipient",
+        "to": [
+          {
+            "email": "recipient@example.test",
+            "name": "Example Recipient",
+            "type": "to"
+          }
+        ],
+        "fields": {
+          "display_name": "Example Recipient"
+        }
+      }
+    ]
+  }
+}

examples/simple-announcement/fixture.json

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+{
+  "schema_version": 1,
+  "id": "simple-announcement",
+  "campaign_file": "campaign.json",
+  "required_modules": [
+    "core",
+    "access",
+    "campaigns"
+  ],
+  "absent_optional_modules": [
+    "files",
+    "mail"
+  ],
+  "external_effects": "forbidden",
+  "expected": {
+    "campaign_id": "simple-announcement",
+    "entries_count": 1,
+    "built_count": 1,
+    "queueable_count": 1,
+    "attachment_count": 0,
+    "subject": "Planned service maintenance for Example Recipient"
+  }
+}