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preset-tests.js
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preset-tests.js
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jest.autoMockOff();
const babel = require("babel-core");
const unpad = require("../../../utils/unpad");
function transform(code, options = {}, sourceType = "script") {
return babel.transform(code, {
sourceType,
minified: false,
presets: [
require("../src/index")
],
}).code;
}
describe("preset", () => {
// https://github.com/babel/babili/issues/122
it ("should fix issue#122", () => {
const source = unpad(`
function foo() {
var a, b, c;
if (a) {
if (b) {
if (c) {}
}
} else {
if (b) {
} else {
if (c) {}
}
}
}
`);
const expected = unpad(`
function foo() {
var d, e, f;
d ? e && f : e || f;
}
`);
expect(transform(source)).toBe(expected);
});
it("should fix remove comments", () => {
const source = unpad(`
var asdf = 1; // test
`);
const expected = unpad(`
var asdf = 1;
`);
expect(transform(source)).toBe(expected);
});
it("should keep license/preserve annotated comments", () => {
const source = unpad(`
/* @license */
var asdf = 1;
`);
const expected = unpad(`
/* @license */
var asdf = 1;
`);
expect(transform(source)).toBe(expected);
});
it("should fix issue#385 - impure if statements with Sequence and DCE", () => {
const source = unpad(`
a = b;
c = d;
if (false) {
const x = y
}
`);
const expected = unpad(`
a = b, c = d;
`);
expect(transform(source)).toBe(expected);
});
});