pcp-mission-planing: Ф4 — валидация-заглушка POST /missions/{id}/validate (контракт конфликтов, пустой diff)

services/pcp-mission-planing-service/src/test/kotlin/space/nstart/pcp/pcp_mission_planing_service/service/MissionEditModesTest.kt

@@ -199,6 +199,25 @@ class MissionEditModesTest {
         assertEquals(HttpStatus.NOT_FOUND, ex.statusCode)
     }
 
+    // --- validate (заглушка) ---
+
+    @Test
+    fun `validate of an existing mission returns an empty conflict list`() {
+        val missionId = UUID.randomUUID()
+        `when`(missionRepository.existsById(missionId)).thenReturn(true)
+
+        val result = service.validateMission(missionId)
+
+        assertEquals(missionId, result.missionId)
+        assertTrue(result.conflicts.isEmpty(), "MVP-заглушка не считает конфликтов")
+    }
+
+    @Test
+    fun `validate of a missing mission yields 404`() {
+        val ex = assertThrows<ResponseStatusException> { service.validateMission(UUID.randomUUID()) }
+        assertEquals(HttpStatus.NOT_FOUND, ex.statusCode)
+    }
+
     // --- helpers ---
 
     private fun survey(): SurveyModeEntity {