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test(jdbc): pin isFirst across cursor boundaries #140

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Merged
magnusp merged 1 commit into from
Oct 22, 2026
Merged

test(jdbc): pin isFirst across cursor boundaries #140

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35 changes: 35 additions & 0 deletions libsql-jdbc/src/test/java/com/github/magnusp/libsql/jdbc/LibsqlResultSetNavigationTest.java
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Original file line number Diff line number Diff line change
Expand Up @@ -118,6 +118,41 @@ void isLastAlwaysThrowsLikeXerial() throws SQLException {
.hasMessage("not supported by sqlite");
}

@Test
void isFirstIsTrueOnlyOnTheFirstRow() throws SQLException {
LibsqlResultSet resultSet = resultSet(TWO_ROWS);

assertThat(resultSet.isFirst()).isFalse();
assertThat(resultSet.next()).isTrue();
assertThat(resultSet.isFirst()).isTrue();
assertThat(resultSet.next()).isTrue();
assertThat(resultSet.isFirst()).isFalse();
assertThat(resultSet.next()).isFalse();
assertThat(resultSet.isFirst()).isFalse();
assertThat(resultSet.next()).isFalse();
assertThat(resultSet.isFirst()).isFalse();
}

@Test
void isFirstIsTrueOnTheSingleRowAndFalseAfterTheEnd() throws SQLException {
LibsqlResultSet resultSet = resultSet(DUPLICATE_LABELS);

assertThat(resultSet.isFirst()).isFalse();
assertThat(resultSet.next()).isTrue();
assertThat(resultSet.isFirst()).isTrue();
assertThat(resultSet.next()).isFalse();
assertThat(resultSet.isFirst()).isFalse();
}

@Test
void isFirstIsFalseForAnEmptyResultSet() throws SQLException {
LibsqlResultSet resultSet = resultSet(NO_ROWS);

assertThat(resultSet.isFirst()).isFalse();
assertThat(resultSet.next()).isFalse();
assertThat(resultSet.isFirst()).isFalse();
}

@Test
void wasNullThrowsBeforeAnyGetterAndAfterTheEndWithoutAGetter() throws SQLException {
LibsqlResultSet beforeFirst = resultSet(DUPLICATE_LABELS);
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