Unit test migrations

squarenotsquare/__tests__/Migration-test.js

@@ -0,0 +1,24 @@
+import { System } from "../realm/entities/System";
+import { migratev0 } from "../realm/migrations/MigrateV0";
+import { migratev1 } from "../realm/migrations/MigrateV1";
+import { MockRealm } from "../__mock__/mockRealmObject";
+
+test('Realm migrates to V0', () => {
+    let oldRealm = new MockRealm(0);
+    let newRealm = new MockRealm(0);
+    migratev0(oldRealm, newRealm);
+    expect(newRealm.schemaVersion).toBe(0);
+})
+
+test('Realm migrates to V1', () => {
+    let oldRealm = new MockRealm(0);
+    let newRealm = new MockRealm(0);
+    migratev0(oldRealm, newRealm);
+
+    oldRealm = newRealm;
+    newRealm = new MockRealm(1);
+    migratev1(oldRealm, newRealm);
+
+    expect(newRealm[System.name][0].key).toBe('username');
+    expect(newRealm[System.name][0].value).toBe('changeme');
+})