#1

src/main/kotlin/com/cengenes/kotlin/api/controller/IndexController.kt

@@ -0,0 +1,14 @@
+package com.cengenes.kotlin.api.controller
+
+import org.springframework.stereotype.Controller
+import org.springframework.web.bind.annotation.GetMapping
+
+@Controller
+class IndexController {
+
+    @GetMapping("/")
+    fun redirectToSwaggerUi(): String {
+        return "redirect:/swagger-ui.html"
+    }
+
+}

src/test/kotlin/com/cengenes/kotlin/api/controller/IndexControllerTest.kt

@@ -0,0 +1,33 @@
+package com.cengenes.kotlin.api.controller
+
+import org.junit.Test
+import org.junit.runner.RunWith
+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.test.context.junit4.SpringRunner
+import org.springframework.test.web.servlet.MockMvc
+
+import org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get
+import org.springframework.test.web.servlet.result.MockMvcResultHandlers.print
+import org.springframework.test.web.servlet.result.MockMvcResultMatchers.redirectedUrl
+import org.springframework.test.web.servlet.result.MockMvcResultMatchers.status
+
+@RunWith(SpringRunner::class)
+@SpringBootTest
+@AutoConfigureMockMvc
+class IndexControllerTest {
+
+    @Autowired
+    private val mockMvc: MockMvc? = null
+
+    @Test
+    @Throws(Exception::class)
+    fun it_should_redirect_to_swagger_ui() {
+        //when and then
+        mockMvc!!.perform(get("/"))
+                .andDo(print())
+                .andExpect(status().is3xxRedirection)
+                .andExpect(redirectedUrl("/swagger-ui.html"))
+    }
+}