TypeScript declarations for Busted

This repository contains TypeScript declarations for Busted. An Elegant Lua unit testing framework.

You can install these via npm.

yarn add -D busted-tstl
# or
npm install -D busted-tstl

link them up in your tsconfig.json file.

It is recommended to use lua-types with these declarations as those will tell TypeScript about Lua’s environment.

{
    "compilerOptions": {
        "lib": ["esnext"],
        "types": [
            "busted-tstl",
            "lua-types/5.1
        ]
    }
}

start creating your busted tests within .ts files (preferably with the suffix _spec.ts within a folder named spec).

describe("mocks", () => {
    it("replaces a table with spies", () => {
        const t = {
            thing: function (this: void, msg) { print(msg) }
        };
        const m = mock(t); // mocks the table with spies, so it will print
        m.thing("Coffee");
        assert.spy(m.thing).was.called_with("Coffee");
    });
    it("replaces a table with stubs", () => {
        const t = {
            thing: function (this: void, msg) { print(msg) }
        };
        const m = mock(t, true); // mocks the table with stubs, so it will not print
        m.thing("Coffee");
        assert.stub(m.thing).was.called_with("Coffee");
        mock.revert(m); // reverts all stubs/spies in m
        m.thing("Tea"); // DOES print 'Tea'
    });
});

Then transpile the file(s) with TypeScriptToLua and run busted!

tstl spec/test_spec.ts
tstl -p tsconfig.json
busted      # Install with `luarocks install busted`

It is recommended to use lua-types with these declarations as those will tell TypeScript about Lua’s environment.

Assertion Statement Info

Assertion statements can be built with underscores and/or dots.

assert.is.True(true);           // Equivalent
assert.is_true(true);           // Equivalent
assert.is.not.True(false);      // Equivalent
assert.is_not_true(false);      // Equivalent

Verbs can be chained. However if there is a not or no within the chain, the assertion is expected to be fail. This cannot be reverted with another not or no.

assert.is.is.is.not.is.not.False(true);   // Assertion failed.
                                          // This was expected because of `not`

Async Tests

To use async() and done() make sure your test case is wrapped in a pending(...) call.

async(); // error, trying to call nil value
done(); // error, trying to call nil value
pending("waiting for sleep to complete", () => {
  async();
  sleep(5000);
  done();
});