test: add tests for persisted wallet

Author: thunderbiscuit

lib/src/test/kotlin/org/bitcoindevkit/LoadWalletTest.kt

@@ -0,0 +1,60 @@
+package org.bitcoindevkit
+
+import org.junit.jupiter.api.Nested
+import org.junit.jupiter.api.Test
+import kotlin.test.assertEquals
+import kotlin.test.assertFails
+
+class LoadWalletTest {
+    private val PERSISTENCE_FILE_PATH = run {
+        val currentDirectory = System.getProperty("user.dir")
+        val dbFileName = "awesome_wallet_1.sqlite3"
+        "$currentDirectory/src/test/resources/$dbFileName"
+    }
+    val sqlitePersister: Persister = Persister.newSqlite(PERSISTENCE_FILE_PATH)
+
+    @Nested
+    inner class Success {
+        @Test
+        fun `Wallet can be loaded from persistence`() {
+            Wallet.load(
+                descriptor = TEST_BIP86_DESCRIPTOR,
+                changeDescriptor = TEST_BIP86_CHANGE_DESCRIPTOR,
+                persister = sqlitePersister
+            )
+        }
+
+        @Test
+        fun `Loaded wallet is at the right revealed index`() {
+            val wallet = Wallet.load(
+                descriptor = TEST_BIP86_DESCRIPTOR,
+                changeDescriptor = TEST_BIP86_CHANGE_DESCRIPTOR,
+                persister = sqlitePersister
+            )
+            val addressInfo: AddressInfo = wallet.revealNextAddress(KeychainKind.EXTERNAL)
+
+            assertEquals(
+                expected = 26u,
+                actual = addressInfo.index,
+            )
+            assertEquals(
+                expected = "bcrt1pqhqlr5hxya35pmr0en5s3w9jyy9cmj90qwev0d36d6787jm27jzqg9kxse",
+                actual = addressInfo.address.toString(),
+            )
+        }
+    }
+
+    @Nested
+    inner class Failure {
+        @Test
+        fun `Loading a wallet with mismatched descriptors should fail`() {
+            assertFails {
+                Wallet.load(
+                    descriptor = TEST_BIP84_DESCRIPTOR,
+                    changeDescriptor = TEST_BIP84_CHANGE_DESCRIPTOR,
+                    persister = sqlitePersister
+                )
+            }
+        }
+    }
+}