Add InAppPaymentTableTest to verify functionality of update method.

app/src/androidTest/java/org/thoughtcrime/securesms/database/InAppPaymentTableTest.kt

@@ -0,0 +1,49 @@
+/*
+ * Copyright 2024 Signal Messenger, LLC
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+package org.thoughtcrime.securesms.database
+
+import androidx.test.ext.junit.runners.AndroidJUnit4
+import org.junit.Before
+import org.junit.Rule
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.signal.core.util.deleteAll
+import org.signal.donations.InAppPaymentType
+import org.thoughtcrime.securesms.database.model.databaseprotos.InAppPaymentData
+import org.thoughtcrime.securesms.testing.SignalActivityRule
+import org.thoughtcrime.securesms.testing.assertIs
+
+@RunWith(AndroidJUnit4::class)
+class InAppPaymentTableTest {
+  @get:Rule
+  val harness = SignalActivityRule()
+
+  @Before
+  fun setUp() {
+    SignalDatabase.inAppPayments.writableDatabase.deleteAll(InAppPaymentTable.TABLE_NAME)
+  }
+
+  @Test
+  fun givenACreatedInAppPayment_whenIUpdateToPending_thenIExpectPendingPayment() {
+    val inAppPaymentId = SignalDatabase.inAppPayments.insert(
+      type = InAppPaymentType.ONE_TIME_DONATION,
+      state = InAppPaymentTable.State.CREATED,
+      subscriberId = null,
+      endOfPeriod = null,
+      inAppPaymentData = InAppPaymentData()
+    )
+
+    val paymentBeforeUpdate = SignalDatabase.inAppPayments.getById(inAppPaymentId)
+    paymentBeforeUpdate?.state assertIs InAppPaymentTable.State.CREATED
+
+    SignalDatabase.inAppPayments.update(
+      inAppPayment = paymentBeforeUpdate!!.copy(state = InAppPaymentTable.State.PENDING)
+    )
+
+    val paymentAfterUpdate = SignalDatabase.inAppPayments.getById(inAppPaymentId)
+    paymentAfterUpdate?.state assertIs InAppPaymentTable.State.PENDING
+  }
+}