1 files changed, 15 insertions, 0 deletions
diff --git a/spec/frontend/profile/utils_spec.js b/spec/frontend/profile/utils_spec.js
new file mode 100644
index 00000000000..43537afe169
--- /dev/null
+++ b/spec/frontend/profile/utils_spec.js
@@ -0,0 +1,15 @@
+import { getVisibleCalendarPeriod } from '~/profile/utils';
+import { CALENDAR_PERIOD_12_MONTHS, CALENDAR_PERIOD_6_MONTHS } from '~/profile/constants';
+
+describe('getVisibleCalendarPeriod', () => {
+  it.each`
+    width   | expected
+    ${1000} | ${CALENDAR_PERIOD_12_MONTHS}
+    ${900}  | ${CALENDAR_PERIOD_6_MONTHS}
+  `('returns $expected when container width is $width', ({ width, expected }) => {
+    const container = document.createElement('div');
+    jest.spyOn(container, 'getBoundingClientRect').mockReturnValueOnce({ width });
+
+    expect(getVisibleCalendarPeriod(container)).toBe(expected);
+  });
+});