TUI: waiting shimmer helper + tests

src/tui/tui-waiting.test.ts

@@ -0,0 +1,41 @@
+import { describe, expect, it } from "vitest";
+
+import { buildWaitingStatusMessage, pickWaitingPhrase } from "./tui-waiting.js";
+
+const theme = {
+  dim: (s: string) => `<d>${s}</d>`,
+  bold: (s: string) => `<b>${s}</b>`,
+  accentSoft: (s: string) => `<a>${s}</a>`,
+} as any;
+
+describe("tui-waiting", () => {
+  it("pickWaitingPhrase rotates every 10 ticks", () => {
+    const phrases = ["a", "b", "c"];
+    expect(pickWaitingPhrase(0, phrases)).toBe("a");
+    expect(pickWaitingPhrase(9, phrases)).toBe("a");
+    expect(pickWaitingPhrase(10, phrases)).toBe("b");
+    expect(pickWaitingPhrase(20, phrases)).toBe("c");
+    expect(pickWaitingPhrase(30, phrases)).toBe("a");
+  });
+
+  it("buildWaitingStatusMessage includes shimmer markup and metadata", () => {
+    const msg = buildWaitingStatusMessage({
+      theme,
+      tick: 1,
+      elapsed: "3s",
+      connectionStatus: "connected",
+      phrases: ["hello"],
+    });
+
+    expect(msg).toContain("connected");
+    expect(msg).toContain("3s");
+    // text is wrapped per-char; check it appears in order
+    expect(msg).toContain("h");
+    expect(msg).toContain("e");
+    expect(msg).toContain("l");
+    expect(msg).toContain("o");
+    // shimmer should contain both highlighted and dim parts
+    expect(msg).toContain("<b><a>");
+    expect(msg).toContain("<d>");
+  });
+});