Improve tests

frontend/deterministic-tests/src/tests/offline-create-same-path-mergeable.test.ts

@@ -0,0 +1,41 @@
+import type { AssertableState } from "../utils/assertable-state";
+import type { TestDefinition } from "../test-definition";
+
+export const offlineCreateSamePathMergeableTest: TestDefinition = {
+    description:
+        "Both clients create a file at the same path while offline with different text content. " +
+        "After both sync, both clients must converge to a merged result containing both contributions.",
+    clients: 2,
+    steps: [
+        {
+            type: "create",
+            client: 0,
+            path: "notes.md",
+            content: "alpha wrote this line"
+        },
+        {
+            type: "create",
+            client: 1,
+            path: "notes.md",
+            content: "beta wrote this different line"
+        },
+
+        { type: "enable-sync", client: 0 },
+        { type: "sync", client: 0 },
+        { type: "enable-sync", client: 1 },
+        { type: "barrier" },
+
+        {
+            type: "assert-consistent",
+            verify: (s: AssertableState): void => {
+                s.assertFileCount(1)
+                    .assertFileExists("notes.md")
+                    .assertContains(
+                        "notes.md",
+                        "alpha wrote this line",
+                        "beta wrote this different line"
+                    );
+            }
+        }
+    ]
+};