Testing POST /batteries

ApplicationTests.java

@Test
void shouldPersistBattery() throws Exception {
    Battery mockBattery =
            new Battery("Gold Coast Mc", "9729", 50000);

    mockMvc
            .perform(
                    post("/batteries")
                            .content(objectMapper.writeValueAsString(mockBattery))
                            .contentType(MediaType.APPLICATION_JSON)
            )
            .andDo(print())
            .andExpect(status().isCreated())
            .andExpect(jsonPath("$.name").value(mockBattery.getName()))
            .andExpect(jsonPath("$.postcode").value(mockBattery.getPostcode()))
            .andExpect(jsonPath("$.capacity").value(mockBattery.getCapacity()));
}