iko-karma-snapshot/dist/es5/index.js

Karma snapshot plugin for iko library

import { Assertion, AssertionError, diff, errMsg } from "iko";
var context = window.__mocha_context__;
var snapshotState = window.__snapshot__;
function snapshotPath(node) {
    var path = [];
    while (node && node.parent) {
        path.push(node.title);
        node = node.parent;
    }
    return path.reverse();
}
Assertion.prototype.toMatchSnapshot = function (update) {
    var received = this.toSnapshot();
    var lang;
    if (typeof received === "object") {
        lang = received.lang;
        received = received.code;
    }
    var path = snapshotPath(context.test);
    var index = context.index++;
    if (update || snapshotState.update) {
        snapshotState.set(path, index, received, lang);
    }
    else {
        var snapshot = snapshotState.get(path, index);
        if (!snapshot) {
            snapshotState.set(path, index, received, lang);
        }
        else {
            var expected = snapshot.code;
            var pass = snapshotState.match(received, expected);
            if (!pass) {
                var diffText = diff(expected, received);
                var message = errMsg()
                    .matcherHint("toMatchSnapshot", "received", "")
                    .info("Expected value to match snapshot " + index + "\n");
                if (diffText !== null) {
                    message.diff("\n", diffText);
                }
                throw new AssertionError(message.compose(), this.toMatchSnapshot);
            }
        }
    }
    return this;
};
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