add enable-wal test

test/functional/sqlite/enable-wal.ts

@@ -0,0 +1,24 @@
+import "reflect-metadata";
+import {expect} from "chai";
+import {Connection} from "../../../src/connection/Connection";
+import {closeTestingConnections, createTestingConnections, reloadTestingDatabases} from "../../utils/test-utils";
+
+describe("sqlite driver > enable wal", () => {
+    let connections: Connection[];
+    before(async () => connections = await createTestingConnections({
+        entities: [],
+        enabledDrivers: ["sqlite"],
+        driverSpecific: {
+            enableWAL: true
+        }
+    }));
+    beforeEach(() => reloadTestingDatabases(connections));
+    after(() => closeTestingConnections(connections));
+
+    it("should set the journal mode as expected", () => Promise.all(connections.map(async connection => {
+        // if we come this far, test was successful as a connection was established
+        const result = await connection.query('PRAGMA journal_mode');
+
+        expect(result).to.eql([{ journal_mode: 'wal'}]);
+    })));
+});