Step1: GitHub(모듈 분리)

app/build.gradle.kts

@@ -2,8 +2,9 @@
 
 plugins {
     id("com.android.application")
-    id("kotlin-android")
-    id("kotlin-kapt")
+    kotlin("android")
+    kotlin("kapt")
+    id("org.jlleitschuh.gradle.ktlint") version "11.5.0"
 }
 
 android {
@@ -20,7 +21,7 @@ android {
     }
 
     buildTypes {
-        getByName("release") {
+        release {
             isMinifyEnabled = false
             proguardFiles(
                 getDefaultProguardFile("proguard-android-optimize.txt"),
@@ -48,9 +49,10 @@ dependencies {
     implementation("com.google.android.material:material:1.7.0")
     implementation("androidx.constraintlayout:constraintlayout:2.1.4")
     implementation("androidx.fragment:fragment-ktx:1.5.5")
+    implementation(project(":core:data"))
 
     testImplementation("junit:junit:4.13.2")
-    testImplementation("com.google.truth:truth:1.1.3")
+    testImplementation("com.google.truth:truth:1.1.4")
     androidTestImplementation("androidx.test.ext:junit:1.1.5")
     androidTestImplementation("androidx.test.espresso:espresso-core:3.5.1")
 }

app/src/main/java/camp/nextstep/edu/github/MainActivity.kt

@@ -1,11 +1,11 @@
 package camp.nextstep.edu.github
 
-import androidx.appcompat.app.AppCompatActivity
 import android.os.Bundle
+import androidx.appcompat.app.AppCompatActivity
 
 class MainActivity : AppCompatActivity() {
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         setContentView(R.layout.activity_main)
     }
-}
+}

buildSrc/src/main/kotlin/Configs.kt

@@ -1,7 +1,8 @@
 object Version {
     const val androidGradlePlugin = "7.4.0"
-    const val kotlin = "1.8.0"
+    const val kotlin = "1.9.0"
     const val compileSdk = 33
     const val minSdk = 26
     const val targetSdk = 33
+    const val retrofit = "2.9.0"
 }

core/data/.gitignore

@@ -0,0 +1 @@
+/build

core/data/build.gradle.kts

@@ -0,0 +1,21 @@
+plugins {
+    id("kotlin")
+    id("org.jlleitschuh.gradle.ktlint") version "11.5.0"
+}
+
+java {
+    sourceCompatibility = JavaVersion.VERSION_1_8
+    targetCompatibility = JavaVersion.VERSION_1_8
+}
+
+dependencies {
+    implementation("org.jetbrains.kotlin:kotlin-stdlib:${Version.kotlin}")
+    implementation("com.squareup.retrofit2:retrofit:${Version.retrofit}")
+    implementation("com.squareup.retrofit2:converter-gson:${Version.retrofit}")
+    implementation(project(":core:domain"))
+
+    testImplementation("junit:junit:4.13.2")
+    testImplementation("com.google.truth:truth:1.1.4")
+    testImplementation("com.squareup.okhttp3:mockwebserver:4.11.0")
+    testImplementation("org.jetbrains.kotlinx:kotlinx-coroutines-test:1.7.1")
+}

core/data/src/main/java/camp/nextstep/edu/github/data/network/GitHubService.kt

@@ -0,0 +1,9 @@
+package camp.nextstep.edu.github.data.network
+
+import camp.nextstep.edu.github.domain.GithubRepository
+import retrofit2.http.GET
+
+interface GitHubService {
+    @GET("/repositories")
+    suspend fun getRepositories(): List<GithubRepository>
+}

core/data/src/main/java/camp/nextstep/edu/github/data/network/GithubRepositoriesDataSource.kt

@@ -0,0 +1,12 @@
+package camp.nextstep.edu.github.data.network
+
+import camp.nextstep.edu.github.domain.GithubRepository
+import camp.nextstep.edu.github.domain.network.GitHubDataSource
+
+internal class GithubRepositoriesDataSource(
+    private val gitHubService: GitHubService
+) : GitHubDataSource {
+    override suspend fun fetchRepositories(): List<GithubRepository> {
+        return gitHubService.getRepositories()
+    }
+}

core/data/src/test/java/camp/nextstep/edu/github/data/network/GithubRepositoriesDataSourceTest.kt

@@ -0,0 +1,67 @@
+package camp.nextstep.edu.github.data.network
+
+import camp.nextstep.edu.github.domain.GithubRepository
+import com.google.common.truth.Truth.assertThat
+import kotlinx.coroutines.test.runTest
+import okhttp3.OkHttpClient
+import okhttp3.mockwebserver.MockResponse
+import okhttp3.mockwebserver.MockWebServer
+import org.junit.After
+import org.junit.Before
+import org.junit.Test
+import retrofit2.Retrofit
+import retrofit2.converter.gson.GsonConverterFactory
+import java.io.File
+import java.util.concurrent.TimeUnit
+
+class GithubRepositoriesDataSourceTest {
+    private lateinit var mockWebServer: MockWebServer
+    private lateinit var api: GitHubService
+    private lateinit var dataSource: GithubRepositoriesDataSource
+
+    private val client = OkHttpClient.Builder()
+        .connectTimeout(1, TimeUnit.SECONDS)
+        .readTimeout(1, TimeUnit.SECONDS)
+        .writeTimeout(1, TimeUnit.SECONDS)
+        .build()
+
+    @Before
+    fun setUp() {
+        mockWebServer = MockWebServer()
+    }
+
+    @After
+    fun tearDown() {
+        mockWebServer.shutdown()
+    }
+
+    @Test
+    fun `GitHub repository들을 불러옴`() = runTest {
+        api = Retrofit.Builder()
+            .baseUrl(mockWebServer.url(""))
+            .client(client)
+            .addConverterFactory(GsonConverterFactory.create())
+            .build()
+            .create(GitHubService::class.java)
+        val body = File("src/test/resources/response.json").readText()
+        val response = MockResponse().setBody(body).setResponseCode(200)
+        mockWebServer.enqueue(response)
+        dataSource = GithubRepositoriesDataSource(api)
+        val actual = dataSource.fetchRepositories()[0]
+        val expected = GithubRepository("nextStep", "android-github")
+        assertThat(actual).isEqualTo(expected)
+    }
+
+    @Test
+    fun `GitHub repository 실제 데이터 체크`() = runTest {
+        api = Retrofit.Builder()
+            .baseUrl(mockWebServer.url("https://api.github.com/"))
+            .client(client)
+            .addConverterFactory(GsonConverterFactory.create())
+            .build()
+            .create(GitHubService::class.java)
+        dataSource = GithubRepositoriesDataSource(api)
+        val actual = dataSource.fetchRepositories()
+        assertThat(actual).hasSize(100)
+    }
+}

core/data/src/test/resources/response.json

@@ -0,0 +1,4 @@
+[{
+  "full_name": "nextStep",
+  "description": "android-github"
+}]

core/domain/.gitignore

@@ -0,0 +1 @@
+/build

core/domain/build.gradle.kts

@@ -0,0 +1,15 @@
+plugins {
+    id("kotlin")
+    id("org.jlleitschuh.gradle.ktlint") version "11.5.0"
+}
+
+java {
+    sourceCompatibility = JavaVersion.VERSION_1_8
+    targetCompatibility = JavaVersion.VERSION_1_8
+}
+dependencies {
+    implementation("com.google.code.gson:gson:2.10.1")
+
+    testImplementation("junit:junit:4.13.2")
+    testImplementation("com.google.truth:truth:1.1.4")
+}

core/domain/src/main/java/camp/nextstep/edu/github/domain/GithubRepository.kt

@@ -0,0 +1,9 @@
+package camp.nextstep.edu.github.domain
+
+import com.google.gson.annotations.SerializedName
+
+data class GithubRepository(
+    @SerializedName("full_name")
+    val fullName: String,
+    val description: String
+)

core/domain/src/main/java/camp/nextstep/edu/github/domain/network/GitHubDataSource.kt

@@ -0,0 +1,7 @@
+package camp.nextstep.edu.github.domain.network
+
+import camp.nextstep.edu.github.domain.GithubRepository
+
+interface GitHubDataSource {
+    suspend fun fetchRepositories(): List<GithubRepository>
+}

settings.gradle.kts

@@ -1,2 +1,4 @@
-include(":app")
 rootProject.name = "android-github"
+include(":app")
+include(":core:domain")
+include(":core:data")