Test java and javascript implementation against test/data/good

[mpkorstanje]

🤔 What's the problem you've observed?

The java implementation currently doesn't test itself against the examples in testdata/good.

✨ Do you have a proposal for making it better?

Copy the Javascript implementation

gherkin-utils/javascript/test/prettyTest.ts

Lines 243 to 258 in 840e19f

	const featureFiles = fg.sync(`${__dirname}/../../testdata/good/*.feature`)
	for (const featureFile of featureFiles) {
	const relativePath = path.relative(__dirname, featureFile)
	it(`renders ${relativePath}`, () => {
	const gherkinSource = fs.readFileSync(featureFile, 'utf-8')
	const gherkinDocument = parse(gherkinSource, new GherkinClassicTokenMatcher())
	const formattedGherkinSource = pretty(gherkinDocument, 'gherkin')
	const language = gherkinDocument.feature?.language || 'en'
	const newGherkinDocument = checkGherkinToAstToGherkin(formattedGherkinSource, language)
	assert(newGherkinDocument)
	// TODO: comments
	if (gherkinDocument.comments.length === 0) {
	assert.deepStrictEqual(neutralize(newGherkinDocument), neutralize(gherkinDocument))
	}
	})
	}

This can be done with JUnit 5's Parameterized tests. For example see:

https://github.com/cucumber/cucumber-expressions/blob/main/java/src/test/java/io/cucumber/cucumberexpressions/CucumberExpressionTest.java

[mpkorstanje]

See also the comments in #53 (comment).