SPRDT-987 cover remaining move-to-past-date reject scenarios

listing-command/listing-command-api/src/test/java/uk/gov/moj/cpp/listing/command/api/ListingCommandApiTest.java

@@ -7,6 +7,7 @@
 import static uk.gov.justice.services.messaging.JsonObjects.createArrayBuilder;
 import static uk.gov.justice.services.messaging.JsonObjects.createReader;
 import static org.hamcrest.CoreMatchers.anyOf;
+import static org.hamcrest.CoreMatchers.containsString;
 import static org.hamcrest.CoreMatchers.is;
 import static org.hamcrest.CoreMatchers.notNullValue;
 import static org.hamcrest.MatcherAssert.assertThat;
@@ -606,6 +607,17 @@ private static LocalDate lastWorkingDayBeforeToday() {
         return day;
     }
 
+    // most recent Saturday strictly before today - with the following Sunday it forms a pure-weekend
+    // span that is always past, ordered, and within 6 months (endDate is at latest today, when today
+    // is Sunday), so only the no-sitting-day rule can reject it
+    private static LocalDate mostRecentSaturday() {
+        LocalDate day = LocalDate.now().minusDays(1);
+        while (day.getDayOfWeek() != java.time.DayOfWeek.SATURDAY) {
+            day = day.minusDays(1);
+        }
+        return day;
+    }
+
     private static final UUID MOVE_COURT_ROOM_ID = randomUUID();
 
     // startTime is an absolute UTC instant (e.g. 2026-07-02T10:00:00.000Z); the request carries no
@@ -674,6 +686,26 @@ public void shouldRejectMoveWhenEndDateBeforeStartDate() {
         verify(sender, never()).send(any());
     }
 
+    @Test
+    public void shouldRejectMoveWhenRangeContainsNoSittingDay() {
+        // Saturday..Sunday span: passes validateMoveDates (past, ordered, within 6 months) but
+        // expands to zero sitting days - courts do not sit at weekends.
+        final LocalDate saturday = mostRecentSaturday();
+        stubMovePayload(randomUUID(), randomUUID(), saturday, "10:00");
+        given(payload.containsKey("endTime")).willReturn(true);
+        given(payload.isNull("endTime")).willReturn(false);
+        given(payload.getString("endTime")).willReturn(saturday.plusDays(1) + "T10:00:00.000Z");
+
+        final MoveHearingToPastDateException thrown = assertThrows(MoveHearingToPastDateException.class,
+                () -> listingCommandApi.handleMoveHearingToPastDate(envelope));
+
+        assertThat(thrown.getHttpStatus(), is(422));
+        assertThat(thrown.getErrorCode(), is("INVALID_DATE_RANGE"));
+        // distinguishes the no-sitting-day INVALID_DATE_RANGE from the end-before-start one
+        assertThat(thrown.getResponseBody().getString("message"), containsString("sitting"));
+        verify(sender, never()).send(any());
+    }
+
     @Test
     public void shouldMoveMagistratesHearingToPastDateEnrichWithSlotDetailsAndSend() {
         final UUID hearingId = randomUUID();

listing-integration-test/src/test/java/uk/gov/moj/cpp/listing/it/MoveHearingToPastDateIT.java

@@ -191,6 +191,16 @@ void shouldRejectMoveWith400WhenCourtRoomIdMissing() {
         assertThat(response.getStatus(), is(400));
     }
 
+    @Test
+    void shouldRejectMoveWith400WhenStartTimeMissing() {
+        final HearingsData hearingsData = hearingsDataWithAllocationDataAndJudiciary(MAGISTRATES_JURISDICTION);
+        final MoveHearingToPastDateSteps moveSteps = new MoveHearingToPastDateSteps(hearingsData);
+
+        final Response response = moveSteps.whenHearingIsMovedWithMissingStartTime();
+
+        assertThat(response.getStatus(), is(400));
+    }
+
     @Test
     void shouldMoveCrownHearingToPastDateListingSideOnlyWithoutCallingCourtScheduler() {
         final MoveHearingToPastDateSteps moveSteps = givenAListedHearing(CROWN_JURISDICTION);

listing-integration-test/src/test/java/uk/gov/moj/cpp/listing/steps/MoveHearingToPastDateSteps.java

@@ -74,6 +74,13 @@ public Response whenHearingIsMovedWithMissingCourtRoom(final LocalDate date) {
         return postMove(hearingId, payload);
     }
 
+    public Response whenHearingIsMovedWithMissingStartTime() {
+        // startTime omitted (schema-mandatory); both ids present so the 400 is unambiguously the
+        // missing startTime. No date parameter - the payload carries no instant at all.
+        final String payload = "{\"courtCentreId\":\"" + courtCentreId + "\",\"courtRoomId\":\"" + courtRoomId + "\"}";
+        return postMove(hearingId, payload);
+    }
+
     /** A multi-day move over [startTime, endTime], scoped to a specific room. */
     public Response whenHearingIsMovedToPastDateRange(final LocalDate startDate, final LocalDate endDate, final String courtRoomId) {
         final String payload = "{\"courtCentreId\":\"" + courtCentreId