transpose & history

src/app/modules/songs/services/transpose.service.spec.ts

@@ -0,0 +1,20 @@
+import {TestBed} from '@angular/core/testing';
+
+import {TransposeService} from './transpose.service';
+
+describe('TransposeService', () => {
+  let service: TransposeService;
+
+  beforeEach(() => {
+    TestBed.configureTestingModule({});
+    service = TestBed.inject(TransposeService);
+  });
+
+  it('should create map', () => {
+    const distance = service.getDistance('D', 'G');
+    const map = service.getMap('D', distance);
+
+    console.log(map);
+    expect(service).toBeTruthy();
+  });
+});