Added truncate method to blog test

src/blog/slug.provider.spec.ts

@@ -0,0 +1,35 @@
+import { Test, TestingModule } from '@nestjs/testing';
+import {SlugProvider} from './slug.provider';
+import {ConfigModule, ConfigService} from 'nestjs-config';
+import * as path from 'path';
+import { INestApplication } from '@nestjs/common';
+
+let module: TestingModule;
+let app: INestApplication;
+let slugProvider: SlugProvider;
+let config: ConfigService;
+
+describe('SlugProvider', async () => {
+  beforeAll(async () => {
+    module = await Test.createTestingModule({
+      imports: [
+        ConfigModule.load(path.resolve(__dirname, '../', 'config', '*.ts')),
+      ],
+      providers: [SlugProvider],
+    }).compile();
+
+    app = module.createNestApplication();
+    await app.init();
+
+    slugProvider = module.get(SlugProvider);
+    config = module.get(ConfigService);
+  });
+
+  it('replacement', () => {
+    expect(slugProvider.replacement()).toEqual(config.get('slugify.replacement'));
+  });
+
+  it('slugify', () => {
+    expect(slugProvider.slugify('test test')).toEqual('test-test');
+  });
+});