test(mattermost): cover defaultAccount resolution

extensions/mattermost/src/mattermost/accounts.test.ts

@@ -0,0 +1,52 @@
+import type { OpenClawConfig } from "openclaw/plugin-sdk";
+import { describe, expect, it } from "vitest";
+import { resolveDefaultMattermostAccountId } from "./accounts.js";
+
+describe("resolveDefaultMattermostAccountId", () => {
+  it("prefers channels.mattermost.defaultAccount when it matches a configured account", () => {
+    const cfg: OpenClawConfig = {
+      channels: {
+        mattermost: {
+          defaultAccount: "alerts",
+          accounts: {
+            default: { botToken: "tok-default", baseUrl: "https://chat.example.com" },
+            alerts: { botToken: "tok-alerts", baseUrl: "https://alerts.example.com" },
+          },
+        },
+      },
+    };
+
+    expect(resolveDefaultMattermostAccountId(cfg)).toBe("alerts");
+  });
+
+  it("normalizes channels.mattermost.defaultAccount before lookup", () => {
+    const cfg: OpenClawConfig = {
+      channels: {
+        mattermost: {
+          defaultAccount: "Ops Team",
+          accounts: {
+            "ops-team": { botToken: "tok-ops", baseUrl: "https://chat.example.com" },
+          },
+        },
+      },
+    };
+
+    expect(resolveDefaultMattermostAccountId(cfg)).toBe("ops-team");
+  });
+
+  it("falls back when channels.mattermost.defaultAccount is missing", () => {
+    const cfg: OpenClawConfig = {
+      channels: {
+        mattermost: {
+          defaultAccount: "missing",
+          accounts: {
+            default: { botToken: "tok-default", baseUrl: "https://chat.example.com" },
+            alerts: { botToken: "tok-alerts", baseUrl: "https://alerts.example.com" },
+          },
+        },
+      },
+    };
+
+    expect(resolveDefaultMattermostAccountId(cfg)).toBe("default");
+  });
+});