Make the test speak with a MockWebServer

Author: cortinico

samples/generated-code/build.gradle

@@ -47,8 +47,9 @@ dependencies {
     implementation "io.reactivex.rxjava2:rxjava:2.2.4"
     implementation "io.reactivex.rxjava2:rxandroid:2.1.0"
 
-    // JUnit4
+    // Testing Dependencies
     testImplementation "junit:junit:4.12"
+    testImplementation "com.squareup.okhttp3:mockwebserver:3.12.3"
 }
 
 generateSwagger {

samples/generated-code/src/test/java/com/yelp/codegen/generatecodesamples/InvokeRetrofitTest.kt

@@ -2,25 +2,41 @@ package com.yelp.codegen.generatecodesamples
 
 import com.yelp.codegen.generatecodesamples.apis.DefaultApi
 import com.yelp.codegen.generatecodesamples.tools.GeneratedCodeConverters
+import okhttp3.mockwebserver.MockResponse
+import okhttp3.mockwebserver.MockWebServer
 import org.junit.Assert.assertEquals
+import org.junit.Rule
 import org.junit.Test
 import retrofit2.Retrofit
 import retrofit2.adapter.rxjava2.RxJava2CallAdapterFactory
 
 class InvokeRetrofitTest {
 
+    @get:Rule
+    val mockWebServer = MockWebServer()
+
     @Test
     fun createAndInvokeRetrofit() {
+        mockWebServer.enqueue(MockResponse().setBody("""
+            {
+                "name": "corgi",
+                "id": 42,
+                "photoUrls": [ "https://via.placeholder.com/150" ]
+            }
+        """.trimIndent()))
+
         val retrofit: Retrofit = Retrofit.Builder()
                 .addCallAdapterFactory(RxJava2CallAdapterFactory.create())
                 .addConverterFactory(GeneratedCodeConverters.converterFactory())
-                .baseUrl("https://petstore.swagger.io/v2/")
+                .baseUrl(mockWebServer.url("/"))
                 .build()
 
         val defaultApi = retrofit.create(DefaultApi::class.java)
         val pet = defaultApi.getPetById(1).blockingGet()
 
-        println(pet)
-        assertEquals(1L, pet.id)
+        assertEquals(42L, pet.id)
+        assertEquals("corgi", pet.name)
+        assertEquals(1, pet.photoUrls.size)
+        assertEquals("https://via.placeholder.com/150", pet.photoUrls[0])
     }
 }