Class5/test doubles end

app/src/test/java/com/juandgaines/testground/data/UserApiFake.kt

@@ -0,0 +1,37 @@
+package com.juandgaines.testground.data
+
+import com.juandgaines.testground.domain.Coordinates
+import com.juandgaines.testground.domain.Place
+import com.juandgaines.testground.domain.Profile
+import com.juandgaines.testground.domain.User
+import java.util.UUID
+
+class UserApiFake : UserApi {
+    var users = (1..10).map {
+        User(
+            id = it.toString(),
+            username = "User$it"
+        )
+    }
+
+    var places = (1..10).map {
+        Place(
+            id = UUID.randomUUID().toString(),
+            name = "Place$it",
+            coordinates = Coordinates(it.toDouble(), it.toDouble())
+        )
+    }
+
+    override suspend fun getUser(userId: String): User {
+        return users.find { it.id == userId } ?: throw Exception("User not found")
+    }
+
+    override suspend fun getPlaces(userId: String): List<Place> {
+        return places.filter { it.id == userId }
+    }
+
+    override suspend fun getProfile(userId: String): Profile {
+        val user = getUser(userId)
+        return Profile(user = user, places = getPlaces(userId))
+    }
+}

app/src/test/java/com/juandgaines/testground/data/UserRepositoryTest.kt

@@ -0,0 +1,41 @@
+package com.juandgaines.testground.data
+
+import com.google.common.truth.Truth
+import com.juandgaines.testground.util.MainDispatcherRule
+import kotlinx.coroutines.ExperimentalCoroutinesApi
+import kotlinx.coroutines.test.runTest
+import org.junit.Before
+import org.junit.Rule
+import org.junit.Test
+
+@OptIn(ExperimentalCoroutinesApi::class)
+class UserRepositoryTest {
+
+    @get:Rule
+    val mainDispatcherRule = MainDispatcherRule()
+
+    private lateinit var repository: UserRepositoryImpl
+    private lateinit var api: UserApiFake
+
+    @Before
+    fun setUp() {
+        // Setup for fake API tests
+        api = UserApiFake()
+        repository = UserRepositoryImpl(api)
+    }
+
+
+    @Test
+    fun givenValidUserId_whenGetProfileWithFakeApi_thenReturnsProfile() = runTest {
+        // Act
+        val profileResult = repository.getProfile("1")
+
+        // Assert
+        Truth.assertThat(profileResult.isSuccess).isTrue()
+        Truth.assertThat(profileResult.getOrThrow().user.id).isEqualTo("1")
+
+        val expectedPlaces = api.places.filter { it.id == "1" }
+        Truth.assertThat(profileResult.getOrThrow().places).isEqualTo(expectedPlaces)
+    }
+
+}