Add unit tests to verify credentials migration handling works as inte…

…nded.

auth/src/test/kotlin/com/tidal/sdk/auth/storage/DefaultTokensStoreMigrationsTest.kt

@@ -0,0 +1,92 @@
+package com.tidal.sdk.auth.storage
+
+import android.content.SharedPreferences
+import com.tidal.sdk.auth.model.Tokens
+import com.tidal.sdk.auth.storage.legacycredentials.LegacyCredentialsV1
+import com.tidal.sdk.auth.storage.legacycredentials.LegacyCredentialsV2
+import com.tidal.sdk.auth.storage.legacycredentials.Scopes
+import com.tidal.sdk.auth.storage.legacycredentials.TokensV1
+import com.tidal.sdk.auth.storage.legacycredentials.TokensV2
+import io.mockk.every
+import io.mockk.mockk
+import junit.framework.TestCase.assertEquals
+import kotlin.test.Test
+import kotlinx.datetime.Instant
+import kotlinx.serialization.encodeToString
+import kotlinx.serialization.json.Json
+import org.junit.jupiter.api.BeforeEach
+
+class DefaultTokensStoreMigrationsTest {
+    private val testCredentialsKey = "testKey"
+    private lateinit var sharedPreferences: SharedPreferences
+    private lateinit var editor: SharedPreferences.Editor
+    private lateinit var defaultTokensStore: DefaultTokensStore
+
+    @BeforeEach
+    fun setUp() {
+        sharedPreferences = mockk()
+        editor = mockk(relaxed = true)
+
+        every { sharedPreferences.edit() } returns editor
+
+        defaultTokensStore = DefaultTokensStore(testCredentialsKey, sharedPreferences)
+    }
+
+    @Test
+    fun `getLatestTokens saves and returns Tokens when SharedPrefs returns LegacyCredentialsV1`() {
+        // given
+        val scopes = Scopes.fromString(setOf("scope1", "scope2").joinToString(""))
+        val legacyCredentialsV1 = LegacyCredentialsV1(
+            clientId = "clientId",
+            requestedScopes = scopes,
+            clientUniqueKey = "clientUniqueKey",
+            grantedScopes = scopes,
+            userId = "userId",
+            expires = null,
+            token = "token",
+        )
+        val refreshToken = "refreshToken"
+        val legacyTokens = TokensV1(legacyCredentialsV1, refreshToken)
+        val expected = Tokens(legacyCredentialsV1.toCredentials(), refreshToken)
+
+        every { sharedPreferences.getString(any(), any()) } answers {
+            Json.encodeToString(legacyTokens)
+        }
+
+        // when
+        val result = defaultTokensStore.getLatestTokens(testCredentialsKey)
+
+        // then
+        println(result)
+        assertEquals(expected, result)
+    }
+
+    @Test
+    fun `getLatestTokens saves and returns Tokens when SharedPrefs returns LegacyCredentialsV2`() {
+        // given
+        val scopes = setOf("scope1", "scope2")
+        val legacyCredentialsV2 = LegacyCredentialsV2(
+            clientId = "clientId",
+            requestedScopes = scopes,
+            clientUniqueKey = "clientUniqueKey",
+            grantedScopes = scopes,
+            userId = "userId",
+            expires = Instant.fromEpochSeconds(0),
+            token = "token",
+        )
+        val refreshToken = "refreshToken"
+        val legacyTokens = TokensV2(legacyCredentialsV2, refreshToken)
+        val expected = Tokens(legacyCredentialsV2.toCredentials(), refreshToken)
+
+        every { sharedPreferences.getString(any(), any()) } answers {
+            Json.encodeToString(legacyTokens)
+        }
+
+        // when
+        val result = defaultTokensStore.getLatestTokens(testCredentialsKey)
+
+        // then
+        println(result)
+        assertEquals(expected, result)
+    }
+}