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import { HintKeyRepositoryImpl } from "../../../src/content/repositories/HintKeyRepository";
describe("HintKeyProducerImpl class", () => {
describe("#produce", () => {
it("produce incremented keys", () => {
const charset = "abc";
const sequences = [
"a",
"b",
"c",
"aa",
"ab",
"ac",
"ba",
"bb",
"bc",
"ca",
"cb",
"cc",
"aaa",
"aab",
"aac",
"aba",
];
const sut = new HintKeyRepositoryImpl();
sut.reset(charset);
for (let i = 0; i < sequences.length; ++i) {
expect(sut.produce()).toEqual(sequences[i]);
}
});
});
describe("#reset", () => {
it("resets charset", () => {
const sut = new HintKeyRepositoryImpl();
sut.reset("ab");
expect(sut.produce()).toEqual("a");
expect(sut.produce()).toEqual("b");
sut.reset("xy");
expect(sut.produce()).toEqual("x");
expect(sut.produce()).toEqual("y");
});
it("throws an exception on empty charset", () => {
const sut = new HintKeyRepositoryImpl();
expect(() => sut.reset("")).toThrow(TypeError);
});
});
});
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