test: add ical export tests

src/test/java/com/slotline/api/ICalExportTest.java

@@ -0,0 +1,102 @@
+package com.slotline.api;
+
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.slotline.reservation.dto.ReservationRequest;
+import com.slotline.resource.dto.ResourceRequest;
+import com.slotline.user.dto.LoginRequest;
+import com.slotline.user.dto.RegisterRequest;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.autoconfigure.web.servlet.AutoConfigureMockMvc;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.http.MediaType;
+import org.springframework.test.web.servlet.MockMvc;
+import org.springframework.test.web.servlet.MvcResult;
+import org.springframework.transaction.annotation.Transactional;
+
+import java.time.Instant;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get;
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.post;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
+
+@SpringBootTest
+@AutoConfigureMockMvc
+@Transactional
+class ICalExportTest {
+
+    private static final Instant SLOT_START = Instant.parse("2026-12-01T10:00:00Z");
+    private static final Instant SLOT_END = Instant.parse("2026-12-01T11:00:00Z");
+
+    @Autowired
+    private MockMvc mockMvc;
+
+    @Autowired
+    private ObjectMapper objectMapper;
+
+    @Test
+    void resourceAndUserFeedsExposeBookedSlotsAsVevents() throws Exception {
+        mockMvc.perform(post("/api/auth/register")
+                        .contentType(MediaType.APPLICATION_JSON)
+                        .content(objectMapper.writeValueAsString(new RegisterRequest("ical-user", "password123"))))
+                .andExpect(status().isCreated());
+
+        String userToken = login("ical-user", "password123");
+        String adminToken = login("admin", "admin12345");
+
+        MvcResult created = mockMvc.perform(post("/api/resources")
+                        .header("Authorization", "Bearer " + adminToken)
+                        .contentType(MediaType.APPLICATION_JSON)
+                        .content(objectMapper.writeValueAsString(new ResourceRequest("Ical room", "feed me"))))
+                .andExpect(status().isCreated())
+                .andReturn();
+        long resourceId = objectMapper.readTree(created.getResponse().getContentAsString()).get("id").asLong();
+
+        mockMvc.perform(post("/api/reservations")
+                        .header("Authorization", "Bearer " + userToken)
+                        .contentType(MediaType.APPLICATION_JSON)
+                        .content(objectMapper.writeValueAsString(
+                                new ReservationRequest(resourceId, SLOT_START, SLOT_END))))
+                .andExpect(status().isCreated());
+
+        String resourceFeed = mockMvc.perform(get("/api/resources/" + resourceId + "/calendar.ics")
+                        .header("Authorization", "Bearer " + userToken))
+                .andExpect(status().isOk())
+                .andReturn().getResponse().getContentAsString();
+
+        assertThat(resourceFeed).contains("BEGIN:VCALENDAR");
+        assertThat(resourceFeed).contains("DTSTART:20261201T100000Z");
+        assertThat(resourceFeed).contains("DTEND:20261201T110000Z");
+        assertThat(countOccurrences(resourceFeed, "BEGIN:VEVENT")).isEqualTo(1);
+
+        String userFeed = mockMvc.perform(get("/api/reservations/calendar.ics")
+                        .header("Authorization", "Bearer " + userToken))
+                .andExpect(status().isOk())
+                .andReturn().getResponse().getContentAsString();
+
+        assertThat(countOccurrences(userFeed, "BEGIN:VEVENT")).isEqualTo(1);
+        assertThat(userFeed).contains("SUMMARY:Ical room");
+    }
+
+    private int countOccurrences(String haystack, String needle) {
+        int count = 0;
+        int index = haystack.indexOf(needle);
+        while (index >= 0) {
+            count++;
+            index = haystack.indexOf(needle, index + needle.length());
+        }
+        return count;
+    }
+
+    private String login(String username, String password) throws Exception {
+        MvcResult result = mockMvc.perform(post("/api/auth/login")
+                        .contentType(MediaType.APPLICATION_JSON)
+                        .content(objectMapper.writeValueAsString(new LoginRequest(username, password))))
+                .andExpect(status().isOk())
+                .andReturn();
+        JsonNode tree = objectMapper.readTree(result.getResponse().getContentAsString());
+        return tree.get("token").asText();
+    }
+}