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import { render, screen } from "@testing-library/svelte";
import userEvent from "@testing-library/user-event";
import { describe, expect, it } from "vitest";
import type { ChatLimitSaveResult } from "../logic/view-model";
import ChatLimitField from "./ChatLimitField.svelte";
// A fake save that resolves ok with the value it was given.
function fakeSave(): {
saves: number[];
last: number | null;
impl: (value: number) => Promise<ChatLimitSaveResult>;
} {
const saves: number[] = [];
return {
saves,
last: null,
impl: async (value: number) => {
saves.push(value);
return { ok: true, chatLimit: value };
},
};
}
describe("ChatLimitField", () => {
it("seeds the input from the persisted limit and disables Set while unchanged", () => {
render(ChatLimitField, { props: { chatLimit: 256, save: fakeSave().impl } });
expect(screen.getByLabelText("Chat limit")).toHaveValue("256");
expect(screen.getByRole("button", { name: "Set" })).toBeDisabled();
});
it("enables Set when the typed value differs (regression: number-binding coercion)", async () => {
const user = userEvent.setup();
const save = fakeSave();
render(ChatLimitField, { props: { chatLimit: 256, save: save.impl } });
const input = screen.getByLabelText("Chat limit");
await user.clear(input);
await user.type(input, "10");
expect(screen.getByRole("button", { name: "Set" })).toBeEnabled();
});
it("keeps Set disabled for non-numeric input", async () => {
const user = userEvent.setup();
const save = fakeSave();
render(ChatLimitField, { props: { chatLimit: 256, save: save.impl } });
const input = screen.getByLabelText("Chat limit");
await user.clear(input);
await user.type(input, "abc");
expect(screen.getByRole("button", { name: "Set" })).toBeDisabled();
});
it("clicking Set calls save with the parsed value and shows the confirmation", async () => {
const user = userEvent.setup();
const save = fakeSave();
const { rerender } = render(ChatLimitField, {
props: { chatLimit: 256, save: save.impl },
});
const input = screen.getByLabelText("Chat limit");
await user.clear(input);
await user.type(input, "50");
await user.click(screen.getByRole("button", { name: "Set" }));
expect(save.saves).toEqual([50]);
// In the real app the reactive `chatLimit` prop updates to the saved value
// (the store sets it synchronously), which clears `dirty` and reveals the
// "Saved" badge. Rerender simulates that propagation.
rerender({ chatLimit: 50, save: save.impl });
expect(screen.getByText(/Saved/i)).toBeInTheDocument();
});
it("clamps a below-floor value when saving", async () => {
const user = userEvent.setup();
const save = fakeSave();
render(ChatLimitField, { props: { chatLimit: 256, save: save.impl } });
const input = screen.getByLabelText("Chat limit");
await user.clear(input);
await user.type(input, "5"); // clamps to MIN (10)
await user.click(screen.getByRole("button", { name: "Set" }));
// The save port receives the clamped value (the view-model clamps before save).
expect(save.saves).toEqual([10]);
expect(input).toHaveValue("10");
});
});
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