Unit Test Generator: Auto-Generate Comprehensive Test Suites
Paste a function, get a complete test suite — edge cases, mocks, and assertions included.
Writing Tests Is Important — But Tedious
Everyone agrees tests are essential. Nobody enjoys writing them. The Unit Test Generator analyzes your function's logic paths, identifies edge cases, and produces a comprehensive test suite in your preferred framework.
How It Works
Provide a function and its dependencies. The AI maps every logical branch, generates test cases for happy paths, edge cases, and error conditions, then outputs framework-specific test code.
import Vincony from "vincony";
const client = new Vincony({ apiKey: "YOUR_API_KEY" });
const sourceCode = `
export function calculateDiscount(price: number, customerType: string, coupon?: string): number {
if (price <= 0) throw new Error("Price must be positive");
let discount = 0;
if (customerType === "premium") discount = 0.2;
else if (customerType === "vip") discount = 0.3;
if (coupon === "SAVE10") discount += 0.1;
return Math.round(price * (1 - discount) * 100) / 100;
}
`;
const tests = await client.tools.generateTests({
code: sourceCode,
language: "typescript",
framework: "vitest",
style: "describe_it",
coverage_target: 100
});
console.log(tests.code);
// describe("calculateDiscount", () => {
// it("applies 20% discount for premium customers", ...)
// it("applies 30% discount for VIP customers", ...)
// it("stacks coupon with customer discount", ...)
// it("throws for non-positive prices", ...)
// it("returns original price for unknown customer types", ...)
// })
console.log(`Test cases: ${tests.case_count}`); // 8
console.log(`Branch coverage: ${tests.estimated_coverage}%`); // 100%Framework Support
Generates tests for Jest, Vitest, Mocha, pytest, unittest, JUnit, RSpec, and Go testing. Each output follows the framework's conventions and best practices.
Mock Generation
Functions with external dependencies? The generator creates appropriate mocks, stubs, and spies automatically — database calls, API requests, file system operations.
// Generate tests with mocks for complex functions
const tests = await client.tools.generateTests({
code: userServiceCode,
language: "typescript",
framework: "vitest",
mock_strategy: "auto", // Automatically mock external deps
include_integration: true // Also generate integration test stubs
});Pricing
10 test generations/month on Free. Unlimited with batch generation on Pro and Enterprise.
Try It Free — 100 API Credits
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