alsatian/dist/core/stringification/stringify.js

TypeScript and JavaScript testing framework for beautiful and readable tests

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
const spying_1 = require("../spying");
function stringify(data) {
    if (isItearable(data)) {
        return stringifyIterable(data);
    }
    if (data instanceof Function) {
        return stringifyFunction(data);
    }
    return stringifyObject(data);
}
exports.stringify = stringify;
function isItearable(data) {
    return data && typeof data[Symbol.iterator] === "function";
}
function stringifyFunction(data) {
    if (data === spying_1.Any) {
        return "Anything";
    }
    return data.name || "anonymous function";
}
function stringifyObject(data) {
    if (data instanceof spying_1.TypeMatcher) {
        return data.stringify();
    }
    return JSON.stringify(data, createCircularReplacer(data)) || "undefined";
}
function stringifyIterable(data) {
    if (data instanceof Array) {
        return stringifyArray(data);
    }
    if (data instanceof Map) {
        return `Map<${data.size}>`;
    }
    return stringifyObject(data);
}
function createCircularReplacer(rootObject) {
    const cache = [];
    return (key, value) => circularReplacer(key, value, cache, rootObject);
}
function circularReplacer(key, value, cache, rootObject) {
    if (typeof value === "function") {
        return value.toString();
    }
    if (typeof value === "object" && value !== null) {
        if (cache.indexOf(value) !== -1) {
            return;
        }
        cache.push(value);
    }
    return value;
}
function stringifyArray(array) {
    return `[${array.map(stringify).join(", ")}]`;
}
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