refactoring: move Query/Function logic into Requester class

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

@@ -0,0 +1,28 @@
+package fr.postgresjson
+
+import fr.postgresjson.connexion.Connection
+import org.junit.jupiter.api.AfterAll
+import org.junit.jupiter.api.BeforeAll
+import org.junit.jupiter.api.TestInstance
+import org.junit.jupiter.api.TestInstance.Lifecycle.PER_CLASS
+import java.io.File
+
+@TestInstance(PER_CLASS)
+abstract class TestAbstract {
+    protected fun getConnextion(): Connection {
+        return Connection(database = "test", username = "test", password = "test")
+    }
+
+    @BeforeAll
+    fun beforeAll() {
+        val initSQL = File(this::class.java.getResource("/fixtures/init.sql").toURI())
+        val promise = getConnextion().connect().sendQuery(initSQL.readText())
+        promise.join()
+    }
+
+    @AfterAll
+    fun afterAll() {
+        val downSQL = File(this::class.java.getResource("/fixtures/down.sql").toURI())
+        getConnextion().connect().sendQuery(downSQL.readText()).join()
+    }
+}