local-scratch-vm/test/unit/serialization_sb2.js

const path = require('path');
const test = require('tap').test;
const extractProjectJson = require('../fixtures/readProjectFile').extractProjectJson;

const RenderedTarget = require('../../src/sprites/rendered-target');
const Runtime = require('../../src/engine/runtime');
const sb2 = require('../../src/serialization/sb2');

test('spec', t => {
    t.type(sb2, 'object');
    t.type(sb2.deserialize, 'function');
    t.end();
});

test('default', t => {
    // Get SB2 JSON (string)
    const uri = path.resolve(__dirname, '../fixtures/default.sb2');
    const json = extractProjectJson(uri);

    // Create runtime instance & load SB2 into it
    const rt = new Runtime();
    sb2.deserialize(json, rt).then(({targets}) => {
        // Test
        t.type(json, 'object');
        t.type(rt, 'object');
        t.type(targets, 'object');

        t.ok(targets[0] instanceof RenderedTarget);
        t.type(targets[0].id, 'string');
        t.type(targets[0].blocks, 'object');
        t.type(targets[0].variables, 'object');
        t.type(targets[0].comments, 'object');

        t.equal(targets[0].isOriginal, true);
        t.equal(targets[0].currentCostume, 0);
        t.equal(targets[0].isOriginal, true);
        t.equal(targets[0].isStage, true);

        t.ok(targets[1] instanceof RenderedTarget);
        t.type(targets[1].id, 'string');
        t.type(targets[1].blocks, 'object');
        t.type(targets[1].variables, 'object');
        t.type(targets[1].comments, 'object');

        t.equal(targets[1].isOriginal, true);
        t.equal(targets[1].currentCostume, 0);
        t.equal(targets[1].isOriginal, true);
        t.equal(targets[1].isStage, false);
        t.end();
    });
});

test('data scoping', t => {
    // Get SB2 JSON (string)
    const uri = path.resolve(__dirname, '../fixtures/data.sb2');
    const json = extractProjectJson(uri);

    // Create runtime instance & load SB2 into it
    const rt = new Runtime();
    sb2.deserialize(json, rt).then(({targets}) => {
        const globalVariableIds = Object.keys(targets[0].variables);
        const localVariableIds = Object.keys(targets[1].variables);
        t.equal(targets[0].variables[globalVariableIds[0]].name, 'foo');
        t.equal(targets[1].variables[localVariableIds[0]].name, 'local');
        t.end();
    });
});

test('whenclicked blocks imported separately', t => {
    // This sb2 fixture has a single "whenClicked" block on both sprite and stage
    const uri = path.resolve(__dirname, '../fixtures/when-clicked.sb2');
    const json = extractProjectJson(uri);

    // Create runtime instance & load SB2 into it
    const rt = new Runtime();
    sb2.deserialize(json, rt).then(({targets}) => {
        const stage = targets[0];
        t.equal(stage.isStage, true); // Make sure we have the correct target
        const stageOpcode = stage.blocks.getBlock(stage.blocks.getScripts()[0]).opcode;
        t.equal(stageOpcode, 'event_whenstageclicked');

        const sprite = targets[1];
        t.equal(sprite.isStage, false); // Make sure we have the correct target
        const spriteOpcode = sprite.blocks.getBlock(sprite.blocks.getScripts()[0]).opcode;
        t.equal(spriteOpcode, 'event_whenthisspriteclicked');

        t.end();
    });
});

test('Ordering', t => {
    // This SB2 has 3 sprites that have been reordered in scratch 2
    // so the order in the file is not the order specified by the indexInLibrary property.
    const uri = path.resolve(__dirname, '../fixtures/ordering.sb2');
    const json = extractProjectJson(uri);
    const rt = new Runtime();
    sb2.deserialize(json, rt).then(({targets}) => {
        // Would fail with any other ordering.
        t.equal(targets[1].sprite.name, 'First');
        t.equal(targets[2].sprite.name, 'Second');
        t.equal(targets[3].sprite.name, 'Third');
        t.end();
    });
});