feat: unit tests for utils (#92)

* init

* get unit test working for course.ts file

* added some other tests

* tests halfway + change config to accomodate js files

* utility functions tests done

* fix: config file + miscellaneous fixes

* fix: prepare script

* fix lock file

---------

Co-authored-by: Rotimi Best <best@classroomio.com>

apps/dashboard/src/lib/utils/functions/getCurrencyFormatter.spec.ts

@@ -0,0 +1,27 @@
+import getCurrencyFormatter from './getCurrencyFormatter';
+
+describe('GetCurrencyFormatter', () => {
+  test('should return a new instance of Intl.NumberFormat with the correct locale and currency options when currency is "NGN"', () => {
+    const result = getCurrencyFormatter('NGN');
+    expect(result).toBeInstanceOf(Intl.NumberFormat);
+    expect(result.resolvedOptions().locale).toBe('en-NG');
+    expect(result.resolvedOptions().currency).toBe('NGN');
+    expect(result.resolvedOptions().minimumFractionDigits).toBe(2);
+  });
+
+  test('should return a new instance of Intl.NumberFormat with the correct locale and currency options when currency is "USD"', () => {
+    const result = getCurrencyFormatter('USD');
+    expect(result).toBeInstanceOf(Intl.NumberFormat);
+    expect(result.resolvedOptions().locale).toBe('en-US');
+    expect(result.resolvedOptions().currency).toBe('USD');
+    expect(result.resolvedOptions().minimumFractionDigits).toBe(2);
+  });
+
+  test('should return a new instance of Intl.NumberFormat with the correct locale and currency options when currency is "EUR"', () => {
+    const result = getCurrencyFormatter('EUR');
+    expect(result).toBeInstanceOf(Intl.NumberFormat);
+    expect(result.resolvedOptions().locale).toBe('en-US');
+    expect(result.resolvedOptions().currency).toBe('EUR');
+    expect(result.resolvedOptions().minimumFractionDigits).toBe(2);
+  });
+});