package servlets;

import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.junit.Test;
import org.mockito.Mockito;

public class TestHelloServlet extends Mockito{
	@Test
	public void servlet_should_not_greet_the_user_if_the_name_is_null() throws IOException{
		HttpServletRequest request = mock(HttpServletRequest.class);
		HttpServletResponse response = mock(HttpServletResponse.class);
		PrintWriter writer = mock(PrintWriter.class);
		when(response.getWriter()).thenReturn(writer);
		HelloServlet servlet = new HelloServlet();

		when(request.getParameter("name")).thenReturn(null);

		servlet.doPost(request, response);

		verify(response).sendRedirect("/");
	}
	@Test
	public void servlet_should_not_greet_the_user_if_the_name_is_empty() throws IOException{
		HttpServletRequest request = mock(HttpServletRequest.class);
		HttpServletResponse response = mock(HttpServletResponse.class);
		PrintWriter writer = mock(PrintWriter.class);
		when(response.getWriter()).thenReturn(writer);
		HelloServlet servlet = new HelloServlet();

		when(request.getParameter("name")).thenReturn("");

		servlet.doPost(request, response);

		verify(response).sendRedirect("/");
	}
	@Test
	public void servlet_should_not_greet_the_user_if_the_name_is_provided() throws IOException{
		HttpServletRequest request = mock(HttpServletRequest.class);
		HttpServletResponse response = mock(HttpServletResponse.class);
		PrintWriter writer = mock(PrintWriter.class);

		HelloServlet servlet = new HelloServlet();

		when(request.getParameter("name")).thenReturn("jan");
		when(response.getWriter()).thenReturn(writer);

		new HelloServlet().doPost(request, response);

		verify(writer).println("<h1>Hello jan</h1>");
	}
}