Add more tests for Model

src/db/Model.ts

@@ -160,14 +160,6 @@ export default abstract class Model {
         return needs_full_update;
     }
 
-    public async exists(): Promise<boolean> {
-        let query = this._factory.select('1');
-        for (const indexField of this._factory.getPrimaryKeyFields()) {
-            query = query.where(indexField, this[indexField]);
-        }
-        return (await query.limit(1).execute()).results.length > 0;
-    }
-
     public async delete(): Promise<void> {
         if (!(await this.exists())) throw new Error('This model instance doesn\'t exist in DB.');
 
@@ -178,6 +170,14 @@ export default abstract class Model {
         await query.execute();
     }
 
+    public async exists(): Promise<boolean> {
+        let query = this._factory.select('1');
+        for (const indexField of this._factory.getPrimaryKeyFields()) {
+            query = query.where(indexField, this[indexField]);
+        }
+        return (await query.limit(1).execute()).results.length > 0;
+    }
+
     public async validate(onlyFormat: boolean = false, connection?: Connection): Promise<void[]> {
         return await Promise.all(this._properties.map(
             prop => this._validators[prop]?.execute(prop, this[prop], onlyFormat, connection)

test/Model.test.ts

@@ -2,6 +2,7 @@ import MysqlConnectionManager from "../src/db/MysqlConnectionManager";
 import Model from "../src/db/Model";
 import {MIGRATIONS} from "./_migrations";
 import ModelFactory from "../src/db/ModelFactory";
+import {ValidationBag, ValidationError} from "../src/db/Validator";
 
 class FakeDummyModel extends Model {
     public id?: number = undefined;
@@ -14,27 +15,15 @@ class FakeDummyModel extends Model {
     }
 }
 
-beforeAll(async (done) => {
+let factory: ModelFactory<FakeDummyModel>;
+
+beforeAll(async () => {
     MysqlConnectionManager.registerMigrations(MIGRATIONS);
     ModelFactory.register(FakeDummyModel);
     await MysqlConnectionManager.prepare();
-    done();
-});
 
-afterAll(async (done) => {
-    await MysqlConnectionManager.endPool();
-    done();
-});
-
-describe('Model', () => {
-    it('should have a proper table name', async () => {
-        const factory = ModelFactory.get(FakeDummyModel);
-        expect(factory.table).toBe('fake_dummy_models');
-        expect(FakeDummyModel.create({}).table).toBe('fake_dummy_models');
-    });
-
-    it('should insert and retrieve properly', async () => {
-        const factory = ModelFactory.get(FakeDummyModel);
+    // Create FakeDummyModel table
+    factory = ModelFactory.get(FakeDummyModel);
     await MysqlConnectionManager.query(`DROP TABLE IF EXISTS ${(factory.table)}`);
     await MysqlConnectionManager.query(`CREATE TABLE ${(factory.table)}(
             id INT NOT NULL AUTO_INCREMENT,
@@ -43,25 +32,99 @@ describe('Model', () => {
             date_default DATETIME DEFAULT NOW(),
             PRIMARY KEY(id)
         )`);
+});
 
+afterAll(async () => {
+    await MysqlConnectionManager.endPool();
+});
+
+describe('Model', () => {
+    it('should construct properly', () => {
+        const date = new Date(888);
+        const model = factory.create({
+            name: 'a_name',
+            date: date,
+            non_existing_property: 'dropped_value',
+        });
+
+        expect(model.id).toBeUndefined();
+        expect(model.name).toBe('a_name');
+        expect(model.date).toBe(date);
+        expect(model.date_default).toBeUndefined();
+        expect(model.non_existing_property).toBeUndefined();
+    });
+
+    it('should have a proper table name', () => {
+        expect(factory.table).toBe('fake_dummy_models');
+        expect(FakeDummyModel.table).toBe('fake_dummy_models');
+        expect(FakeDummyModel.create({}).table).toBe('fake_dummy_models');
+    });
+
+    it('should insert properly', async () => {
         const date = new Date(569985);
-        let instance: FakeDummyModel | null = FakeDummyModel.create({
+        const insertInstance: FakeDummyModel | null = factory.create({
             name: 'name1',
             date: date,
         });
 
-        console.log(instance)
-        await instance.save();
-        expect(instance.id).toBe(1);
-        expect(instance.name).toBe('name1');
-        expect(instance.date?.getTime()).toBeCloseTo(date.getTime(), -4);
-        expect(instance.date_default).toBeDefined();
 
-        instance = await FakeDummyModel.getById(1);
-        expect(instance).toBeDefined();
-        expect(instance!.id).toBe(1);
-        expect(instance!.name).toBe('name1');
-        expect(instance!.date?.getTime()).toBeCloseTo(date.getTime(), -4);
-        expect(instance!.date_default).toBeDefined();
-    }, 15000);
+        // Insert
+        expect(await insertInstance.exists()).toBeFalsy();
+        await insertInstance.save();
+        expect(await insertInstance.exists()).toBeTruthy();
+
+        expect(insertInstance.id).toBe(1); // Auto id from insert
+        expect(insertInstance.name).toBe('name1');
+        expect(insertInstance.date?.getTime()).toBeCloseTo(date.getTime(), -4);
+        expect(insertInstance.date_default).toBeDefined();
+
+        // Check that row exists in DB
+        const retrievedInstance = await FakeDummyModel.getById(1);
+        expect(retrievedInstance).toBeDefined();
+        expect(retrievedInstance!.id).toBe(1);
+        expect(retrievedInstance!.name).toBe('name1');
+        expect(retrievedInstance!.date?.getTime()).toBeCloseTo(date.getTime(), -4);
+        expect(retrievedInstance!.date_default).toBeDefined();
+
+        const failingInsertModel = factory.create({
+            name: 'a',
+        });
+        await expect(failingInsertModel.save()).rejects.toBeInstanceOf(ValidationBag);
+    });
+
+    it('should update properly', async () => {
+        const insertModel = factory.create({
+            name: 'update',
+        });
+        await insertModel.save();
+
+        const preUpdatedModel = await FakeDummyModel.getById(insertModel.id);
+        expect(preUpdatedModel).not.toBeNull();
+        expect(preUpdatedModel!.name).toBe(insertModel.name);
+
+        // Update model
+        preUpdatedModel!.name = 'updated_name';
+        await preUpdatedModel!.save();
+
+        const postUpdatedModel = await FakeDummyModel.getById(insertModel.id);
+        expect(postUpdatedModel).not.toBeNull();
+        expect(postUpdatedModel!.id).toBe(insertModel.id);
+        expect(postUpdatedModel!.name).not.toBe(insertModel.name);
+        expect(postUpdatedModel!.name).toBe(preUpdatedModel!.name);
+    });
+
+    it('should delete properly', async () => {
+        const insertModel = factory.create({
+            name: 'delete',
+        });
+        await insertModel.save();
+
+        const preDeleteModel = await FakeDummyModel.getById(insertModel.id);
+        expect(preDeleteModel).not.toBeNull();
+
+        await preDeleteModel!.delete();
+
+        const postDeleteModel = await FakeDummyModel.getById(insertModel.id);
+        expect(postDeleteModel).toBeNull();
+    });
 });