Tests for fruit shop impl

[RomanChygryn]

No description provided.

[liliia-ponomarenko]

Good job! Let’s improve your solution;)

[JJJazl]

Let's remove it. We don't need to create an instance of Main class, because we have static method main().
In general, it's the right way to declare dependencies and initialize it. You will do the same in book-store project, for example

Suggested change

	private final FileReaderService fileReader;
	private final DataConverterService dataConverter;
	private final OperationStrategy operationStrategy;
	private final ShopService shopService;
	private final ReportGenerator reportGenerator;
	private final FileWriterService fileWriter;
	public Main(FileReaderService fileReader,
	DataConverterService dataConverter,
	OperationStrategy operationStrategy,
	ShopService shopService,
	ReportGenerator reportGenerator,
	FileWriterService fileWriter) {
	this.fileReader = fileReader;
	this.dataConverter = dataConverter;
	this.operationStrategy = operationStrategy;
	this.shopService = shopService;
	this.reportGenerator = reportGenerator;
	this.fileWriter = fileWriter;
	}
	private final FileReaderService fileReader;
	private final DataConverterService dataConverter;
	private final OperationStrategy operationStrategy;
	private final ShopService shopService;
	private final ReportGenerator reportGenerator;
	private final FileWriterService fileWriter;
	public Main(FileReaderService fileReader,
	DataConverterService dataConverter,
	OperationStrategy operationStrategy,
	ShopService shopService,
	ReportGenerator reportGenerator,
	FileWriterService fileWriter) {
	this.fileReader = fileReader;
	this.dataConverter = dataConverter;
	this.operationStrategy = operationStrategy;
	this.shopService = shopService;
	this.reportGenerator = reportGenerator;
	this.fileWriter = fileWriter;
	}

[JJJazl]

Let's just make it static and call in main() method

[JJJazl]

You don't need this test, because you have already verified in your previous tests, that RuntimeException is thrown when an error occurs

[JJJazl]

What happens if the number is negative?)
Let's change it and add tests for it. See if other handlers need it too