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unit testing applied #1

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4 changes: 4 additions & 0 deletions .babelrc
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{
"presets": ["@babel/preset-env"]
}

68 changes: 68 additions & 0 deletions __tests__/calcTip.test.js
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import { calcTip, verifier, renderOutput } from "../src/js/index"; // Adjust path as needed

describe("Tip Calculator Tests", () => {
beforeEach(() => {
// Set up a mock DOM structure with all required elements
document.body.innerHTML = `
<div class="percentages-container">
<button class="radio-parcent" value="10">10%</button>
<button class="radio-parcent" value="15">15%</button>
<button class="radio-parcent" value="20">20%</button>
</div>
<input id="bill" value="100" />
<input id="persons" value="2" />
<input class="input-custom" />
<div id="tip">0</div>
<div id="total">0</div>
<div class="error-msg"></div>
<button class="btn-reset">Reset</button>
`;
});

test("calcTip returns correct values", () => {
const result = calcTip(100, 15, 2);
expect(result.tip).toBeCloseTo(7.5, 2); // Tip per person
expect(result.total).toBeCloseTo(57.5, 2); // Total per person
});

test("Percentage button click updates the percentage correctly", () => {
const bill = 200;
const percent = 15;
const persons = 4;
verifier(bill, percent, persons);

const tipOutput = document.getElementById("tip");
const totalOutput = document.getElementById("total");

expect(tipOutput.textContent).toBe("7.50");
expect(totalOutput.textContent).toBe("57.50");
});

test("calcTip handles zero bill correctly", () => {
const result = calcTip(0, 15, 2);
expect(result.tip).toBe(0);
expect(result.total).toBe(0);
});

test("calcTip handles zero people gracefully", () => {
expect(() => calcTip(100, 15, 0)).toThrow("Number of people cannot be zero");
});

test("calcTip handles large values", () => {
const result = calcTip(100000, 20, 10);
expect(result.tip).toBeCloseTo(2000, 2); // Tip per person
expect(result.total).toBeCloseTo(12000, 2); // Total per person
});

test("Custom percentage input updates correctly", () => {
const inpCustom = document.querySelector(".input-custom");
inpCustom.value = "25";
verifier(200, +inpCustom.value, 4);

const tipOutput = document.getElementById("tip");
const totalOutput = document.getElementById("total");

expect(tipOutput.textContent).toBe("12.50");
expect(totalOutput.textContent).toBe("62.50");
});
});
106 changes: 106 additions & 0 deletions coverage/clover.xml
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2 changes: 2 additions & 0 deletions coverage/coverage-final.json
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