feature: add forceAllDown to migration

src/main/kotlin/fr/postgresjson/migration/Migrations.kt

@@ -227,7 +227,7 @@ data class Migrations private constructor(
             up().map {
                 list[Pair(it.key, Direction.UP)] = it.value
             }
-            down(true).map {
+            down().map {
                 list[Pair(it.key, Direction.DOWN)] = it.value
             }
             sendQuery("COMMIT")
@@ -240,6 +240,20 @@ data class Migrations private constructor(
         return this.copy().runTest()
     }
 
+    fun forceAllDown(): Map<Pair<String, Direction>, Status> {
+        val list: MutableMap<Pair<String, Direction>, Status> = mutableMapOf()
+        connection.apply {
+            sendQuery("BEGIN")
+            lock()
+            down(true).map {
+                list[Pair(it.key, Direction.DOWN)] = it.value
+            }
+            sendQuery("COMMIT")
+        }
+
+        return list.toMap()
+    }
+
     private fun runTest(): Map<Pair<String, Direction>, Status> {
         val list: MutableMap<Pair<String, Direction>, Status> = mutableMapOf()
         connection.apply {

src/test/kotlin/fr/postgresjson/MigrationTest.kt

@@ -69,7 +69,17 @@ class MigrationTest(): TestAbstract() {
         val resources = File(this::class.java.getResource("/sql/real_migrations").toURI())
         Migrations(resources, getConnextion()).apply {
             run().apply {
-                size `should be equal to` 2
+                size `should be equal to` 1
+            }
+        }
+    }
+
+    @Test
+    fun `run migrations force down`() {
+        val resources = File(this::class.java.getResource("/sql/real_migrations").toURI())
+        Migrations(resources, getConnextion()).apply {
+            forceAllDown().apply {
+                size `should be equal to` 1
             }
         }
     }