Add coverage tests for calendar interactions

src/calendar.tsx

@@ -266,6 +266,7 @@ export default class Calendar extends Component<CalendarProps, CalendarState> {
   componentDidUpdate(prevProps: CalendarProps) {
     if (
       this.props.preSelection &&
+      isValid(this.props.preSelection) &&
       (!isSameDay(this.props.preSelection, prevProps.preSelection) ||
         this.props.monthSelectedIn !== prevProps.monthSelectedIn)
     ) {
@@ -468,6 +469,11 @@ export default class Calendar extends Component<CalendarProps, CalendarState> {
   };
 
   header = (date: Date = this.state.date): React.ReactElement[] => {
+    // Return empty array if date is invalid
+    if (!isValid(date)) {
+      return [];
+    }
+
     const disabled = this.props.disabled;
     const startOfWeek = getStartOfWeek(
       date,
@@ -781,7 +787,9 @@ export default class Calendar extends Component<CalendarProps, CalendarState> {
     }
     return (
       <h2 className={classes.join(" ")}>
-        {formatDate(date, this.props.dateFormat, this.props.locale)}
+        {isValid(date)
+          ? formatDate(date, this.props.dateFormat, this.props.locale)
+          : ""}
       </h2>
     );
   };
@@ -1112,6 +1120,17 @@ export default class Calendar extends Component<CalendarProps, CalendarState> {
   };
 
   renderAriaLiveRegion = (): React.ReactElement => {
+    // Don't render aria-live message if date is invalid
+    if (!isValid(this.state.date)) {
+      return (
+        <span
+          role="alert"
+          aria-live="polite"
+          className="react-datepicker__aria-live"
+        />
+      );
+    }
+
     const { startPeriod, endPeriod } = getYearsPeriod(
       this.state.date,
       this.props.yearItemNumber ?? Calendar.defaultProps.yearItemNumber,

src/month.tsx

@@ -27,6 +27,7 @@ import {
   isSameMonth,
   isSameQuarter,
   isSpaceKeyDown,
+  isValid,
   newDate,
   setMonth,
   setQuarter,
@@ -447,6 +448,11 @@ export default class Month extends Component<MonthProps> {
   };
 
   renderWeeks = () => {
+    // Return empty array if day is invalid
+    if (!isValid(this.props.day)) {
+      return [];
+    }
+
     const weeks = [];
     const isFixedHeight = this.props.fixedHeight;
 
@@ -1138,6 +1144,11 @@ export default class Month extends Component<MonthProps> {
       ? ariaLabelPrefix.trim() + " "
       : "";
 
+    // Format aria-label, return empty string if date is invalid
+    const formattedAriaLabel = isValid(day)
+      ? `${formattedAriaLabelPrefix}${formatDate(day, "MMMM, yyyy", this.props.locale)}`
+      : "";
+
     const shouldUseListboxRole = showMonthYearPicker || showQuarterYearPicker;
 
     if (shouldUseListboxRole) {
@@ -1150,7 +1161,7 @@ export default class Month extends Component<MonthProps> {
           onPointerLeave={
             this.props.usePointerEvent ? this.handleMouseLeave : undefined
           }
-          aria-label={`${formattedAriaLabelPrefix}${formatDate(day, "MMMM, yyyy", this.props.locale)}`}
+          aria-label={formattedAriaLabel}
           role="listbox"
         >
           {showMonthYearPicker ? this.renderMonths() : this.renderQuarters()}
@@ -1172,7 +1183,7 @@ export default class Month extends Component<MonthProps> {
           onPointerLeave={
             this.props.usePointerEvent ? this.handleMouseLeave : undefined
           }
-          aria-label={`${formattedAriaLabelPrefix}${formatDate(day, "MMMM, yyyy", this.props.locale)}`}
+          aria-label={formattedAriaLabel}
           role="rowgroup"
         >
           {this.renderWeeks()}

src/test/calendar_test.test.tsx

@@ -2,7 +2,8 @@
  * @jest-environment jsdom
  */
 
-import { render, fireEvent, act, waitFor } from "@testing-library/react";
+import { render, fireEvent, waitFor } from "@testing-library/react";
+import { act } from "react";
 import {
   setDate,
   startOfMonth,

src/test/click_outside_wrapper.test.tsx

@@ -194,4 +194,35 @@ describe("ClickOutsideWrapper", () => {
 
     removeEventListenerSpy.mockRestore();
   });
+
+  it("invokes handler registered on document with composedPath target", () => {
+    const addEventListenerSpy = jest.spyOn(document, "addEventListener");
+    const removeEventListenerSpy = jest.spyOn(document, "removeEventListener");
+
+    const { unmount } = render(
+      <ClickOutsideWrapper onClickOutside={onClickOutsideMock}>
+        <div>Inside</div>
+      </ClickOutsideWrapper>,
+    );
+
+    const handlerEntry = addEventListenerSpy.mock.calls.find(
+      ([type]) => type === "mousedown",
+    );
+    const handler = handlerEntry?.[1] as EventListener;
+
+    const outsideNode = document.createElement("div");
+    const mockEvent = {
+      composed: true,
+      composedPath: () => [outsideNode],
+      target: outsideNode,
+    } as unknown as MouseEvent;
+
+    handler(mockEvent);
+
+    expect(onClickOutsideMock).toHaveBeenCalledTimes(1);
+
+    unmount();
+    addEventListenerSpy.mockRestore();
+    removeEventListenerSpy.mockRestore();
+  });
 });

src/test/date_utils_test.test.ts

@@ -926,6 +926,41 @@ describe("date_utils", () => {
     });
   });
 
+  describe("isTimeInDisabledRange edge cases", () => {
+    it("throws when either minTime or maxTime is missing", () => {
+      expect(() =>
+        isTimeInDisabledRange(newDate(), { minTime: newDate() }),
+      ).toThrow("Both minTime and maxTime props required");
+    });
+
+    it("returns false when isWithinInterval throws", async () => {
+      jest.doMock("date-fns", () => {
+        const actual = jest.requireActual("date-fns");
+        return {
+          ...actual,
+          isWithinInterval: () => {
+            throw new Error("boom");
+          },
+        };
+      });
+
+      try {
+        const { isTimeInDisabledRange: mockedIsTimeInDisabledRange } =
+          await import("../date_utils");
+
+        expect(
+          mockedIsTimeInDisabledRange(new Date(), {
+            minTime: new Date(),
+            maxTime: new Date(),
+          }),
+        ).toBe(false);
+      } finally {
+        jest.resetModules();
+        jest.dontMock("date-fns");
+      }
+    });
+  });
+
   describe("isDayInRange", () => {
     it("should tell if day is in range", () => {
       const day = newDate("2016-02-15 09:40");
@@ -1105,6 +1140,14 @@ describe("date_utils", () => {
 
       expect(isMonthInRange(startDate, endDate, 5, day)).toBe(true);
     });
+
+    it("should return false when the start date is after the end date", () => {
+      const day = newDate("2024-01-01");
+      const startDate = newDate("2024-02-01");
+      const endDate = newDate("2024-01-01");
+
+      expect(isMonthInRange(startDate, endDate, 1, day)).toBe(false);
+    });
   });
 
   describe("getStartOfYear", () => {
@@ -1139,6 +1182,14 @@ describe("date_utils", () => {
 
       expect(isQuarterInRange(startDate, endDate, 5, day)).toBe(true);
     });
+
+    it("should return false when the start quarter is after the end quarter", () => {
+      const day = newDate("2024-01-01");
+      const startDate = newDate("2024-10-01");
+      const endDate = newDate("2024-04-01");
+
+      expect(isQuarterInRange(startDate, endDate, 1, day)).toBe(false);
+    });
   });
 
   describe("isYearInRange", () => {
@@ -1580,14 +1631,33 @@ describe("date_utils", () => {
   });
 
   describe("isDayInRange error handling", () => {
-    it("returns false when isWithinInterval throws", () => {
-      const testDate = new Date("2024-01-15");
-      const invalidStartDate = new Date("invalid");
-      const invalidEndDate = new Date("also-invalid");
-
-      const result = isDayInRange(testDate, invalidStartDate, invalidEndDate);
+    it("returns false when isWithinInterval throws", async () => {
+      jest.doMock("date-fns", () => {
+        const actual = jest.requireActual("date-fns");
+        return {
+          ...actual,
+          isWithinInterval: () => {
+            throw new Error("boom");
+          },
+        };
+      });
 
-      expect(result).toBe(false);
+      try {
+        const { isDayInRange: mockedIsDayInRange } = await import(
+          "../date_utils"
+        );
+
+        expect(
+          mockedIsDayInRange(
+            new Date("2024-01-15"),
+            new Date("2024-01-10"),
+            new Date("2024-01-20"),
+          ),
+        ).toBe(false);
+      } finally {
+        jest.resetModules();
+        jest.dontMock("date-fns");
+      }
     });
 
     it("returns true for dates inside a valid range", () => {