feat(layout): plan 02 — provider consumption + layout WS + localStorage migration

1 files changed, 35 insertions, 0 deletions

diff --git a/src/adapters/ws/logic.test.ts b/src/adapters/ws/logic.test.ts
index c4ec7e3..a7d30a7 100644
--- a/src/adapters/ws/logic.test.ts
+++ b/src/adapters/ws/logic.test.ts
@@ -463,3 +463,38 @@ describe("parseServerMessage — extensions-changed (plan 05)", () => {
     expect(parseServerMessage(JSON.stringify({ type: "extensions-changed" }))).toBeNull();
   });
 });
+
+describe("parseServerMessage — layout (plan 02)", () => {
+  const TREE = { version: 1, root: { kind: "leaf", view: "chat" } };
+
+  it("parses the broadcast (workspaceId + full tree)", () => {
+    const result = parseServerMessage(
+      JSON.stringify({ type: "layout", workspaceId: "ws-a", tree: TREE }),
+    );
+    expect(result).toEqual({ type: "layout", workspaceId: "ws-a", tree: TREE });
+  });
+
+  it("rejects a missing/invalid workspaceId", () => {
+    expect(parseServerMessage(JSON.stringify({ type: "layout", tree: TREE }))).toBeNull();
+    expect(parseServerMessage(JSON.stringify({ type: "layout", workspaceId: 7, tree: TREE }))).toBeNull();
+  });
+
+  it("rejects a missing/invalid tree (wrong version, missing root, non-object)", () => {
+    expect(parseServerMessage(JSON.stringify({ type: "layout", workspaceId: "ws-a" }))).toBeNull();
+    expect(
+      parseServerMessage(
+        JSON.stringify({ type: "layout", workspaceId: "ws-a", tree: { version: 2, root: {} } }),
+      ),
+    ).toBeNull();
+    expect(
+      parseServerMessage(
+        JSON.stringify({ type: "layout", workspaceId: "ws-a", tree: { version: 1 } }),
+      ),
+    ).toBeNull();
+    expect(parseServerMessage(JSON.stringify({ type: "layout", workspaceId: "ws-a", tree: 7 }))).toBeNull();
+  });
+
+  it("an unknown type still parses to null (the layout addition doesn't loosen the guard)", () => {
+    expect(parseServerMessage(JSON.stringify({ type: "layout.unknown" }))).toBeNull();
+  });
+});