Detest

A Deno Testing Library

We don't just hate bugs, we detest them!

Use

import { describe, it, test, runTests} from "./detest/detest.ts"

describe("testing", () => {
  it("works", () => { 1 + 1 })"

  describe("describes can be nested", () => {
    test("1 + -1", () => expect(1 + (-1)).toBe(0)) 
    test("1 + -3", () => expect(1 + (-3)).toBe(-2)) 
  })

  describe("async testing", () => {
    it("is also possible", async () => {
      let value = await fetchValue()

      expect(value).toBe("found")
    })
  })

  describe("before(each)", () => {
    let setupValue
    let resets

    before(() => {
      setupValue = 12345
    })

    beforeEach(() => {
      resets = 0
    })

    it("should be 0", () => { 
      expect(resets).toBe(0)

      resets++
    })
    it("should still be 0", () => expect(resets).toBe(0))
  })
})

runTest()

API

• function describe(description: string, callback: () => void): void
• function it(description: string, callback: () => void | Promise<void>): void
• function test: Alias for it.
• function before(callback: () => void): void
• function beforeEach(callback: () => void): void
• function expect(actual: any): DeferredExpectation
• class DeferredExpectation
  • toBe(expected: any)

Development

Run Tests

deno detest.test.ts

Roadmap

• after/afterEach
• expand expectation library
• async before(Each)