Examples with ReadPastEndException org.neo4j.storageengine.api.ReadPastEndException used on opensource projects

Example 6 with ReadPastEndException

use of org.neo4j.storageengine.api.ReadPastEndException in project neo4j by neo4j.

the class ReadAheadChannelTest method shouldReturnPositionWithinBufferedStream.

@Test
public void shouldReturnPositionWithinBufferedStream() throws Exception {
    // given
    EphemeralFileSystemAbstraction fsa = fileSystemRule.get();
    File file = new File("foo.txt");
    int readAheadSize = 512;
    int fileSize = readAheadSize * 8;
    createFile(fsa, file, fileSize);
    ReadAheadChannel<StoreChannel> bufferedReader = new ReadAheadChannel<>(fsa.open(file, "r"), readAheadSize);
    // when
    for (int i = 0; i < fileSize / Long.BYTES; i++) {
        assertEquals(Long.BYTES * i, bufferedReader.position());
        bufferedReader.getLong();
    }
    assertEquals(fileSize, bufferedReader.position());
    try {
        bufferedReader.getLong();
        fail();
    } catch (ReadPastEndException e) {
    // expected
    }
    assertEquals(fileSize, bufferedReader.position());
}