embark/test_apps/test_app/test/simple_storage_spec.js

contract("SimpleStorage", function() {

  this.timeout(0);
  before(function(done) {
    this.timeout(0);

    //config({
    //  node: "http://localhost:8545"
    //});

    var contractsConfig = {
      "SimpleStorage": {
        args: [100]
      }
    };
    EmbarkSpec.deployAll(contractsConfig, () => { done() });
  });

  it("should set constructor value", async function() {
    let result = await SimpleStorage.methods.storedData().call();
    assert.equal(result, 100);
  });

  it("set storage value", async function() {
    await SimpleStorage.methods.set(150).send();
    let result = await SimpleStorage.methods.get().call();
    assert.equal(result, 499650);
  });

});