Add unit tests for PaymentRepository

android/lib/payment/build.gradle.kts

@@ -44,4 +44,11 @@ dependencies {
 
     // Billing
     implementation(project(Dependencies.Mullvad.billingLib))
+
+    // Test dependencies
+    testImplementation(project(Dependencies.Mullvad.commonTestLib))
+    testImplementation(Dependencies.Kotlin.test)
+    testImplementation(Dependencies.KotlinX.coroutinesTest)
+    testImplementation(Dependencies.MockK.core)
+    testImplementation(Dependencies.junit)
 }

android/lib/payment/src/test/kotlin/net/mullvad/mullvadvpn/lib/payment/PaymentRepositoryTest.kt

@@ -0,0 +1,117 @@
+package net.mullvad.mullvadvpn.lib.payment
+
+import io.mockk.coEvery
+import io.mockk.every
+import io.mockk.mockk
+import kotlin.test.assertEquals
+import kotlin.test.assertFalse
+import kotlin.test.assertIs
+import kotlinx.coroutines.flow.MutableSharedFlow
+import kotlinx.coroutines.test.runBlockingTest
+import kotlinx.coroutines.test.runTest
+import net.mullvad.mullvadvpn.lib.billing.BillingRepository
+import net.mullvad.mullvadvpn.lib.billing.model.BillingProduct
+import net.mullvad.mullvadvpn.lib.billing.model.BillingPurchase
+import net.mullvad.mullvadvpn.lib.billing.model.PurchaseEvent
+import net.mullvad.mullvadvpn.lib.billing.model.PurchaseFlowResult
+import net.mullvad.mullvadvpn.lib.billing.model.QueryProductResult
+import net.mullvad.mullvadvpn.lib.common.test.TestCoroutineRule
+import org.junit.After
+import org.junit.Before
+import org.junit.Rule
+import org.junit.Test
+
+class PaymentRepositoryTest {
+    @get:Rule val testCoroutineRule = TestCoroutineRule()
+
+    private val mockBillingRepository: BillingRepository = mockk()
+
+    private val purchaseEventFlow =
+        MutableSharedFlow<PurchaseEvent>(replay = 1, extraBufferCapacity = 1)
+
+    private lateinit var paymentRepository: PaymentRepository
+
+    @Before
+    fun setUp() {
+        every { mockBillingRepository.purchaseEvents } returns purchaseEventFlow
+    }
+
+    @After fun tearDown() {}
+
+    @Test
+    fun testQueryAvailablePaymentShowWebPayment() = runTest {
+        // Arrange
+        paymentRepository =
+            PaymentRepository(billingRepository = mockBillingRepository, showWebPayment = true)
+        coEvery { mockBillingRepository.queryProducts(any()) } returns
+            QueryProductResult.ItemUnavailable
+
+        // Act
+        val result = paymentRepository.queryAvailablePaymentTypes()
+
+        // Assert
+        assert(result.webPaymentAvailable)
+    }
+
+    @Test
+    fun testQueryAvailablePaymentHideWebPayment() = runTest {
+        // Arrange
+        paymentRepository =
+            PaymentRepository(billingRepository = mockBillingRepository, showWebPayment = false)
+        coEvery { mockBillingRepository.queryProducts(any()) } returns
+            QueryProductResult.ItemUnavailable
+
+        // Act
+        val result = paymentRepository.queryAvailablePaymentTypes()
+
+        // Assert
+        assertFalse(result.webPaymentAvailable)
+    }
+
+    @Test
+    fun testQueryAvailablePaymentProductsAvailable() = runTest {
+        // Arrange
+        paymentRepository =
+            PaymentRepository(billingRepository = mockBillingRepository, showWebPayment = false)
+        val mockProduct: BillingProduct = mockk()
+        coEvery { mockBillingRepository.queryProducts(any()) } returns
+            QueryProductResult.Ok(products = listOf(mockProduct))
+
+        // Act
+        val result = paymentRepository.queryAvailablePaymentTypes().billingPaymentAvailability
+
+        // Assert
+        assertIs<BillingPaymentAvailability.ProductsAvailable>(result)
+        assertEquals(mockProduct, result.products.first())
+    }
+
+    @Test
+    fun testQueryAvailablePaymentProductsUnavailable() = runTest {
+        // Arrange
+        paymentRepository =
+            PaymentRepository(billingRepository = mockBillingRepository, showWebPayment = false)
+        coEvery { mockBillingRepository.queryProducts(any()) } returns
+            QueryProductResult.ItemUnavailable
+
+        // Act
+        val result = paymentRepository.queryAvailablePaymentTypes().billingPaymentAvailability
+
+        // Assert
+        assertIs<BillingPaymentAvailability.ProductsUnavailable>(result)
+    }
+
+    @Test
+    fun testQueryAvailablePaymentBillingUnavailableError() = runTest {
+        // Arrange
+        paymentRepository =
+            PaymentRepository(billingRepository = mockBillingRepository, showWebPayment = false)
+        coEvery { mockBillingRepository.queryProducts(any()) } returns
+            QueryProductResult.BillingUnavailable
+
+        // Act
+        val result = paymentRepository.queryAvailablePaymentTypes().billingPaymentAvailability
+
+        // Assert
+        assertIs<BillingPaymentAvailability.Error.BillingUnavailable>(result)
+    }
+}