DateTimeControllerTest.java

package de.asideas.crowdsource.controller;

import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
import org.springframework.test.context.web.WebAppConfiguration;
import org.springframework.test.web.servlet.MockMvc;
import org.springframework.test.web.servlet.MvcResult;
import org.springframework.test.web.servlet.setup.MockMvcBuilders;
import org.springframework.web.context.WebApplicationContext;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;

import javax.annotation.Resource;
import java.util.regex.Pattern;

import static org.hamcrest.core.Is.is;
import static org.junit.Assert.assertThat;
import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get;
import static org.springframework.test.web.servlet.result.MockMvcResultHandlers.print;
import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;

@RunWith(SpringJUnit4ClassRunner.class)
@WebAppConfiguration
@ContextConfiguration(classes = DateTimeControllerTest.Config.class)
public class DateTimeControllerTest {

    @Resource
    private WebApplicationContext webApplicationContext;

    private MockMvc mockMvc;

    @Before
    public void init() {
        mockMvc = MockMvcBuilders.webAppContextSetup(webApplicationContext).build();
    }

    @Test
    public void testGetDatetime() throws Exception {
        final MvcResult mvcResult = mockMvc.perform(get("/datetime"))
                .andExpect(status().isOk())
                .andReturn();

        String response = mvcResult.getResponse().getContentAsString();
        String pattern = "^" + Pattern.quote("{\"dateTime\":") + "\\d{13}" + Pattern.quote("}") + "$";
        assertThat("Response (" + response + ") does not match regex: " + pattern, response.matches(pattern), is(true));
    }

    @Configuration
    @EnableWebMvc
    static class Config {

        @Bean
        public DateTimeController dateTimeController() {
            return new DateTimeController();
        }
    }
}