test: ファイルサイズ制限を超えたファイルのときファイルのダウンロードに失敗するように

src/test/kotlin/dev/usbharu/hideout/core/service/resource/KtorResourceResolveServiceTest.kt

@@ -0,0 +1,53 @@
+package dev.usbharu.hideout.core.service.resource
+
+import dev.usbharu.hideout.application.config.MediaConfig
+import dev.usbharu.hideout.core.domain.exception.media.RemoteMediaFileSizeException
+import io.ktor.client.*
+import io.ktor.client.engine.mock.*
+import io.ktor.http.*
+import io.ktor.http.HttpHeaders.ContentLength
+import kotlinx.coroutines.test.runTest
+import org.junit.jupiter.api.Test
+import org.junit.jupiter.api.assertThrows
+import org.junit.jupiter.api.extension.ExtendWith
+import org.mockito.InjectMocks
+import org.mockito.Spy
+import org.mockito.junit.jupiter.MockitoExtension
+
+@ExtendWith(MockitoExtension::class)
+class KtorResourceResolveServiceTest {
+
+    @Spy
+    private val httpClient: HttpClient = HttpClient(MockEngine {
+        when (it.url.encodedPath) {
+            "/over-size-limit" -> {
+                respond(ByteArray(1000), HttpStatusCode.OK, Headers.build {
+                    append(ContentLength, "1000")
+                })
+            }
+
+            else -> {
+                respond("Not Found", HttpStatusCode.NotFound)
+            }
+        }
+    }) {
+        expectSuccess = true
+    }
+
+    @Spy
+    private val cacheManager: CacheManager = InMemoryCacheManager()
+
+    @Spy
+    private val mediaConfig: MediaConfig = MediaConfig()
+
+    @InjectMocks
+    private lateinit var ktorResourceResolveService: KtorResourceResolveService
+
+    @Test
+    fun ファイルサイズ制限を超えたときRemoteMediaFileSizeExceptionが発生する() = runTest {
+        ktorResourceResolveService.sizeLimit = 100L
+        assertThrows<RemoteMediaFileSizeException> {
+            ktorResourceResolveService.resolve("https://example.com/over-size-limit")
+        }
+    }
+}