1 files changed, 45 insertions, 0 deletions
diff --git a/src/features/chat/reasoning-effort.test.ts b/src/features/chat/reasoning-effort.test.ts
new file mode 100644
index 0000000..6d409e9
--- /dev/null
+++ b/src/features/chat/reasoning-effort.test.ts
@@ -0,0 +1,45 @@
+import { describe, expect, it } from "vitest";
+import {
+  DEFAULT_REASONING_EFFORT,
+  effectiveEffort,
+  effortOptions,
+  isReasoningEffort,
+  REASONING_EFFORT_LEVELS,
+} from "./reasoning-effort";
+
+describe("reasoning-effort helpers", () => {
+  it("ladder matches the wire contract, in ascending depth order", () => {
+    expect(REASONING_EFFORT_LEVELS).toEqual(["low", "medium", "high", "xhigh", "max"]);
+  });
+
+  it("the server default is high", () => {
+    expect(DEFAULT_REASONING_EFFORT).toBe("high");
+  });
+
+  it("isReasoningEffort narrows ladder strings and rejects everything else", () => {
+    for (const level of REASONING_EFFORT_LEVELS) {
+      expect(isReasoningEffort(level)).toBe(true);
+    }
+    expect(isReasoningEffort("banana")).toBe(false);
+    expect(isReasoningEffort("")).toBe(false);
+    expect(isReasoningEffort("HIGH")).toBe(false);
+  });
+
+  it("effectiveEffort maps null (never set) to the default, not 'off'", () => {
+    expect(effectiveEffort(null)).toBe("high");
+  });
+
+  it("effectiveEffort passes a persisted value through", () => {
+    expect(effectiveEffort("xhigh")).toBe("xhigh");
+    expect(effectiveEffort("low")).toBe("low");
+  });
+
+  it("effortOptions lists every level once and marks only the default", () => {
+    const options = effortOptions();
+    expect(options.map((o) => o.value)).toEqual([...REASONING_EFFORT_LEVELS]);
+    expect(options.find((o) => o.value === "high")?.label).toBe("high (default)");
+    for (const option of options) {
+      if (option.value !== "high") expect(option.label).toBe(option.value);
+    }
+  });
+});