fix(date-adapter): Problem with this inside a function + unit tests

Signed-off-by: Bartosz Bobin <bartosz.bobin@dynatrace.com>

libs/barista-components/core/src/date/date-adapter.spec.ts

@@ -0,0 +1,43 @@
+/**
+ * @license
+ * Copyright 2022 Dynatrace LLC
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+import { createDateWithOverflow } from './date-adapter';
+
+describe(`createDateWithOverflow`, () => {
+  it.each`
+    year    | month | date  | expectedYear | expectedMonth | expectedDate
+    ${2020} | ${1}  | ${25} | ${2020}      | ${1}          | ${25}
+    ${1900} | ${2}  | ${1}  | ${1900}      | ${2}          | ${1}
+    ${1899} | ${6}  | ${15} | ${1899}      | ${6}          | ${15}
+    ${1627} | ${10} | ${28} | ${1627}      | ${10}         | ${28}
+    ${64}   | ${6}  | ${18} | ${64}        | ${6}          | ${18}
+    ${19}   | ${0}  | ${10} | ${19}        | ${0}          | ${10}
+  `(
+    `should create Date instance for $date-$month-$year`,
+    ({ year, month, date, expectedYear, expectedMonth, expectedDate }) => {
+      // when
+      const result = createDateWithOverflow(year, month, date);
+
+      // then
+      expect(result.getFullYear()).toBe(expectedYear);
+      expect(result.getMonth()).toBe(expectedMonth);
+      expect(result.getDate()).toBe(expectedDate);
+      expect(result.getHours()).toBe(0);
+      expect(result.getMinutes()).toBe(0);
+      expect(result.getSeconds()).toBe(0);
+      expect(result.getMilliseconds()).toBe(0);
+    },
+  );
+});

libs/barista-components/core/src/date/index.ts

@@ -14,4 +14,9 @@
  * limitations under the License.
  */
 
-export * from './date-adapter';
+export {
+  DtDateAdapter,
+  DtNativeDateAdapter,
+  DT_DATE_LOCALE_FACTORY,
+  DT_DATE_LOCALE,
+} from './date-adapter';