Function "Observable has a from property"

test/from.js:7–14

(test, { Observable })

export default {

    "Observable has a from property" (test, { Observable }) {

        testMethodProperty(test, Observable, "from", {
            configurable: true,
            writable: true,
            length: 1
        });
    },

    "Allowed argument types" (test, { Observable }) {