fix: add support for enrollments/aggregate endpoint

src/api/analytics/AnalyticsEnrollments.js

@@ -11,6 +11,28 @@ import AnalyticsBase from './AnalyticsBase.js'
  * @see https://docs.dhis2.org/en/develop/using-the-api/dhis-core-version-236/analytics.html#webapi_enrollment_analytics
  */
 class AnalyticsEnrollments extends AnalyticsBase {
+    /**
+     * @param {!AnalyticsRequest} req Request object
+     *
+     * @returns {Promise} Promise that resolves with the analytics aggregate data from the api.
+     *
+     * @example
+     * const req = new analytics.request()
+     *  .withProgram('eBAyeGv0exc')
+     *  .addDataDimension(['Uvn6LCg7dVU','OdiHJayrsKo'])
+     *  .addPeriodDimension('LAST_4_QUARTERS')
+     *  .addOrgUnitDimension(['lc3eMKXaEfw','PMa2VCrupOd'])
+     *  .addOrgUnitFilter('O6uvpzGd5pu')
+     *  .withStartDate('2017-10-01')
+     *  .withEndDate('2017-10-31');
+     *
+     * analytics.enrollments.getAggregate(req)
+     *  .then(console.log);
+     */
+    getAggregate(req) {
+        return this.fetch(req.withPath('enrollments/aggregate'))
+    }
+
     /**
      * @param {!AnalyticsRequest} req Request object
      *

src/api/analytics/__tests__/AnalyticsEnrollments.spec.js

@@ -27,6 +27,29 @@ describe('analytics.enrollments', () => {
         expect(enrollments.dataEngine).toBe(dataEngineMockObject)
     })
 
+    describe('.getAggregate()', () => {
+        beforeEach(() => {
+            enrollments = new AnalyticsEnrollments(new DataEngineMock())
+
+            request = new AnalyticsRequest().withLimit(10)
+
+            fixture = fixtures.get('/api/analytics/aggregate')
+
+            dataEngineMock.query.mockReturnValue(
+                Promise.resolve({ data: fixture })
+            )
+        })
+
+        it('should be a function', () => {
+            expect(enrollments.getAggregate).toBeInstanceOf(Function)
+        })
+
+        it('should resolve a promise with data', () =>
+            enrollments.getAggregate(request).then((data) => {
+                expect(data).toEqual(fixture)
+            }))
+    })
+
     describe('.getQuery()', () => {
         beforeEach(() => {
             enrollments = new AnalyticsEnrollments(new DataEngineMock())