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/*
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 *  This file is part of CoCalc: Copyright © 2020 Sagemath, Inc.
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 *  License: MS-RSL – see LICENSE.md for details
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 */
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import ephemeralSyncstring from "./ephemeral-syncstring";
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// This mostly tests the trivial minimal edge cases.
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describe("create ephemeral syncstring and test managing undo/redo using it", () => {
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  it("creates ephemeral syncstring and tests undo/redo", async () => {
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    const syncstring = await ephemeralSyncstring();
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    syncstring.from_str("cocalc");
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    expect(syncstring.to_str()).toBe("cocalc");
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    await syncstring.save();
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    syncstring.from_str("cocalc and sagemath");
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    expect(syncstring.to_str()).toBe("cocalc and sagemath");
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    syncstring.undo();
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    expect(syncstring.to_str()).toBe("cocalc");
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    syncstring.undo();
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    expect(syncstring.to_str()).toBe("");
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    syncstring.redo();
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    expect(syncstring.to_str()).toBe("cocalc");
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    syncstring.redo();
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    expect(syncstring.to_str()).toBe("cocalc and sagemath");
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    await syncstring.close();
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  });
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  it("illustrates how you have to use save to get a step in the undo/redo", async () => {
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    const syncstring = await ephemeralSyncstring();
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    syncstring.from_str("cocalc");
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    expect(syncstring.to_str()).toBe("cocalc");
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    syncstring.from_str("cocalc and sagemath");
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    expect(syncstring.to_str()).toBe("cocalc and sagemath");
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    syncstring.undo();
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    expect(syncstring.to_str()).toBe("");
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    syncstring.redo();
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    expect(syncstring.to_str()).toBe("cocalc and sagemath");
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    await syncstring.close();
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  });
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});
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