Add deterministic tests

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

@@ -0,0 +1,67 @@
+import type { ClientState, TestDefinition } from "../test-definition";
+import { assert } from "../utils/assert";
+
+
+function verifyBothFilesExist(state: ClientState): void {
+    assert(
+        state.files.size === 2,
+        `Expected 2 files, got ${state.files.size}: ${[...state.files.keys()].join(", ")}`
+    );
+    assert(
+        state.files.has("data.bin"),
+        "Expected data.bin to exist"
+    );
+    assert(
+        state.files.has("data (1).bin"),
+        "Expected data (1).bin to exist"
+    );
+
+    const contents = new Set(state.files.values());
+    assert(
+        contents.has("binary data from client 0"),
+        `Expected one file to contain "binary data from client 0"`
+    );
+    assert(
+        contents.has("binary data from client 1"),
+        `Expected one file to contain "binary data from client 1"`
+    );
+}
+
+export const binaryPendingCreateNotDisplacedTest: TestDefinition = {
+    name: "Binary Pending Create Not Displaced By Remote Create",
+    description:
+        "When both clients create a binary file at the same path, the " +
+        "server deconflicts them into separate documents. Both files " +
+        "should exist on both clients after sync.",
+    clients: 2,
+    steps: [
+        { type: "enable-sync", client: 0 },
+        { type: "enable-sync", client: 1 },
+
+        // Both go offline
+        { type: "disable-sync", client: 0 },
+        { type: "disable-sync", client: 1 },
+
+        // Both create binary file at same path (use .bin extension)
+        {
+            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"
+        },
+
+        // Both come online
+        { type: "enable-sync", client: 0 },
+        { type: "enable-sync", client: 1 },
+        { type: "barrier" },
+
+        // Both files should exist (server deconflicted them)
+        { type: "assert-consistent", verify: verifyBothFilesExist }
+    ]
+};