@dataProvider example

WithDataProvider.java

@Test(dataProvider = "invalidEmails")
public void emailShouldBeValid(final String invalidEmail, final String expectedMessage) {
	page.registerUser(invalidEmail);
	
	assertThat(page).field("email").hasError(expectedMessage);
}

@DataProvider(name = "invalidEmails")
public Object[][] getInvalidEmails() {
	final String expectedErrorMessage =
		tr("ru.mystamps.web.validation.jsr303.Email.message");
	
	return new Object[][] {
		{"login", expectedErrorMessage},
		{"login@domain", expectedErrorMessage}
	};
}

WithLoop.java

@Test
public void emailShouldBeValid() {
	final String[] emails = new String[] {
			"login",
			"login@domain"
	};
	
	for (final String invalidEmail : emails) {
		page.registerUser(invalidEmail);
		
		assertThat(page)
			.field("email")
			.hasError(tr("ru.mystamps.web.validation.jsr303.Email.message"));
	}
}