implement testing and create a simple test for Userlist

userlist/src/androidTest/java/com/hako/userlist/feature/Mocks.kt

@@ -0,0 +1,29 @@
+package com.hako.userlist.feature
+
+import com.hako.base.domain.database.dao.UserDao
+import com.hako.base.domain.database.entities.UserEntity
+import com.hako.userlist.domain.datasource.UserlistRemoteApi
+import com.hako.userlist.model.User
+import io.reactivex.Single
+
+class MockUserDao(private val userList: List<UserEntity>) : UserDao {
+    override fun save(entity: UserEntity) {}
+
+    override fun saveAll(entities: List<UserEntity>) {}
+
+    override fun saveFavorite(id: Int, favorite: Boolean) = 1
+
+    override fun getAllUsers() = userList
+
+    override fun getFavoriteUsers() = userList.filter { it.isFavorite }
+
+    override fun count() = userList.count()
+
+    override fun nukeDatabase() {}
+}
+
+class MockUserApi(private val userList: List<User>) : UserlistRemoteApi {
+    override fun getUsers() = Single.fromCallable { getAllUsers() }
+
+    private fun getAllUsers() = userList
+}

userlist/src/androidTest/java/com/hako/userlist/feature/UserlistFragmentTest.kt

@@ -0,0 +1,94 @@
+package com.hako.userlist.feature
+
+import androidx.fragment.app.testing.launchFragmentInContainer
+import androidx.test.platform.app.InstrumentationRegistry
+import com.hako.base.domain.database.dao.UserDao
+import com.hako.testing.isTextDisplayed
+import com.hako.userlist.domain.datasource.UserlistRemoteApi
+import com.hako.userlist.domain.usecase.GetFavoriteUsers
+import com.hako.userlist.domain.usecase.GetUsers
+import com.hako.userlist.domain.usecase.SetFavoriteStatus
+import com.hako.userlist.model.User
+import com.hako.userlist.model.toUserEntity
+import com.hako.userlist.viewmodel.UserlistViewmodel
+import org.junit.Before
+import org.junit.Test
+import org.koin.androidx.viewmodel.dsl.viewModel
+import org.koin.core.context.loadKoinModules
+import org.koin.core.context.startKoin
+import org.koin.dsl.module
+
+class UserlistFragmentTest {
+
+    @Before
+    fun setupKoin() {
+        startKoin {
+            InstrumentationRegistry.getInstrumentation().targetContext
+            modules(module {
+                factory { GetUsers(get()) }
+                factory { GetFavoriteUsers(get()) }
+                factory { SetFavoriteStatus(get()) }
+                viewModel { UserlistViewmodel() }
+            })
+        }
+    }
+
+    @Test
+    fun shouldShowUserlist_withAllUsers() {
+        userlist {
+            initialState()
+        } should {
+            showTwoBasicUsers()
+        }
+    }
+
+    private fun userlist(func: UserlistRobot.() -> Unit) =
+        UserlistRobot().apply {
+            func()
+        }
+}
+
+class UserlistRobot {
+
+    fun initialState() {
+        loadKoinModules(
+            module {
+                factory<UserDao> { MockUserDao(loadTwoBasicUsers().map { it.toUserEntity() }) }
+                factory<UserlistRemoteApi> { MockUserApi(loadTwoBasicUsers()) }
+            }
+        )
+        launchFragmentInContainer<UserlistFragment>()
+    }
+
+    infix fun should(func: UserlistResult.() -> Unit) {
+        UserlistResult().apply { func() }
+    }
+
+    private fun loadTwoBasicUsers() = listOf(
+        User(
+            1,
+            "Marian Arriaga",
+            "mariancita",
+            "test@gmail.com",
+            "+56873912",
+            "www.test.com"
+        ),
+        User(
+            2,
+            "Carlos Martinez",
+            "carlitos",
+            "test2@gmail.com",
+            "+56873912",
+            "www.test2.com"
+        )
+    )
+}
+
+class UserlistResult {
+    fun showTwoBasicUsers() {
+        "Marian Arriaga".isTextDisplayed()
+        "mariancita".isTextDisplayed()
+        "Carlos Martinez".isTextDisplayed()
+        "carlitos".isTextDisplayed()
+    }
+}