Add Faker

[jogjitu]

Feature description

Add faker for demo data generation

Describe why this should be added to Spectrum

Fake helps is demo test data generation which can save a lot of time

Additional context

[giulong]

Are you talking about this? It seems to be unmaintained, but if you think it's still valid is ok for me.

Can you provide any additional info, such as a code snippet of how you currently use it, or how you would like to use it in Spectrum? Or is the snippet in their README enough?

Faker faker = new Faker();

String name = faker.name().fullName(); // Miss Samanta Schmidt
String firstName = faker.name().firstName(); // Emory
String lastName = faker.name().lastName(); // Barton

String streetAddress = faker.address().streetAddress(); // 60018 Sawayn Brooks Suite 449

Based on this, we could just inject the new Faker() instance in tests classes, so that you don't have to manage it by yourself. Since they have constructors that take Locale and Random instances I would go for a configuration node like this (values here are just an example):

faker:
  locale: en_US
  random: 24

so that the injected Faker is configured accordingly. What do you think?

[jogjitu]

Yes, this makes sense

[giulong]

Ok, I'm gonna work on it in the next days. Keep you posted.
If you wanna contribute by implementing it, just let me know and I'll share few considerations.

[giulong]

Looking at Javafaker issues, I found many in which they talk about Datafaker as a replacement, for example this one. Basically, Datafaker is a fork whose api is compatible with Javafaker, and is actively maintained, so no CVEs and new features. For completeness, here's the Datafaker's docs.

For the reasons above, I chose Datafaker. Constructors are the same, they take (optionally) a Locale and a Random instance. So, it can be configured in Spectrum via this node:

faker:
  locale: it
  random: 24

Here you can find the currently supported locales. The Spectrum's internal default is this:

faker:
  locale: en
  random: null

Meaning if you need no random seed and the english locale, you can leverage the default and avoid configuring it explicitly.

I added a couple tests to show how to use it. Basically, you just need to leverage the injected faker instance directly:

@Test
void test() {
    String name = faker.name().fullName(); // Miss Samanta Schmidt
    String number = faker.numerify("##");
    String anotherNumber = faker.expression("#{numerify '##'}");
    ...
}

You can find the implementation in PR #325. Tell me if you think something is missing or wrong. Otherwise, if it's ok for you, I'll prepare a new release with it. Please let me know