Function expectTransform

test/createTestHelpers.js:18–34

(script)

  //     .withWarnings(["My warning"]);
  //
  function expectTransform(script) {
    const {code, warnings} = transformer.run(script);

    return {
      toReturn(expectedValue) {
        expect(code).to.equal(expectedValue);
        return this;
      },
      withWarnings(expectedWarnings) {
        expect(warnings).to.deep.equal(expectedWarnings);
        return this;
      },
      withoutWarnings() {
        return this.withWarnings([]);
      },
    };
  }

  // Asserts that transforming the string has no effect,
  // and also allows to check for warnings like so: