code review

Author: BillCarsonFr

docs/database_migration_test.md

@@ -1,13 +1,21 @@
+<!--- TOC -->
+
+* [Testing database migration](#testing-database-migration)
+  * [Creating a reference database](#creating-a-reference-database)
+  * [Testing](#testing)
+
+<!--- END -->
+
 ## Testing database migration
 
 ### Creating a reference database
 
 Databases are encrypted, the key to decrypt is needed to setup the test.
 A special build property must be enabled to extract it. 
 
-Set `vector.debugPrivateData=true` in `gradle.properties`
+Set `vector.debugPrivateData=true` in `~/.gradle/gradle.properties` (to avoid committing by mistake)
 
-Launch the app in your emulator, login and use the app to feel up the database.
+Launch the app in your emulator, login and use the app to fill up the database.
 
 Save the key for the tested database
 ```
@@ -20,8 +28,8 @@ Use the [Device File Explorer](https://developer.android.com/studio/debug/device
 
 Go to `data/data/im.vector.app.debug/files/<hash>/`
 Pick the database you want to test (name can be found in SessionRealmConfigurationFactory):
- - crypto_store.real for crypto
- - disk_store for session
+ - crypto_store.realm for crypto
+ - disk_store.realm for session
  - etc... 
 
 Download the file on your disk
@@ -33,7 +41,7 @@ Copy the file in `src/AndroidTest/assets`
 see `CryptoSanityMigrationTest` or `RealmSessionStoreMigration43Test` for sample tests.
 
 There are already some databases in the assets folder.
-The existing test will properly detect schema changes, and fail with such errors:
+The existing test will properly detect schema changes, and fail with such errors if a migration is missing:
 
 ```
 io.realm.exceptions.RealmMigrationNeededException: Migration is required due to the following errors:

matrix-sdk-android/src/androidTest/java/org/matrix/android/sdk/internal/database/CryptoSanityMigrationTest.kt

@@ -48,7 +48,7 @@ class CryptoSanityMigrationTest {
         val realmName = "crypto_store_20.realm"
         val migration = RealmCryptoStoreMigration(object : Clock {
             override fun epochMillis(): Long {
-                return System.currentTimeMillis()
+                return 0L
             }
         })
         val realmConfiguration = configurationFactory.createConfiguration(