Add deterministic-tests (#190)

Reviewed-on: https://home.schmelczer.dev/git/git/andras/vault-link/pulls/190
Co-authored-by: Andras Schmelczer <andras@schmelczer.dev>
Co-committed-by: Andras Schmelczer <andras@schmelczer.dev>

frontend/deterministic-tests/src/tests/binary-pending-create-not-displaced.test.ts

@@ -0,0 +1,40 @@
+import type { AssertableState } from "../utils/assertable-state";
+import type { TestDefinition } from "../test-definition";
+
+export const binaryPendingCreateNotDisplacedTest: TestDefinition = {
+    description:
+        "Two clients each create a binary file at the same path while offline. " +
+        "After syncing, both files should exist on both clients at separate paths.",
+    clients: 2,
+    steps: [
+        {
+            type: "create",
+            client: 0,
+            path: "data.bin",
+            content: "binary data from client 0"
+        },
+        {
+            type: "create",
+            client: 1,
+            path: "data.bin",
+            content: "binary data from client 1"
+        },
+
+        { type: "enable-sync", client: 0 },
+        { type: "enable-sync", client: 1 },
+        { type: "barrier" },
+
+        {
+            type: "assert-consistent",
+            verify: (s: AssertableState): void => {
+                s.assertFileCount(2)
+                    .assertFileExists("data.bin")
+                    .assertFileExists("data (1).bin")
+                    .assertAnyFileContains(
+                        "binary data from client 0",
+                        "binary data from client 1"
+                    );
+            }
+        }
+    ]
+};