cache.flush()
    assertAbsent("a")
  }

  @Test
  fun cacheSingleValueOfSizeGreaterThanMaxSize() {
    cache.close()
    createNewCacheWithSize(10)
    set("a", "aaaaaaaaaaa", "a") // size=12
    cache.flush()
    assertAbsent("a")
  }

  @Test
  fun constructorDoesNotAllowZeroCacheSize() {
    assertFailsWith<IllegalArgumentException> {

	writer := newBitrotWriter(disk, "", volume, filePath, 35, bitrotAlgo, 10)

	_, err = writer.Write([]byte("aaaaaaaaaa"))
	if err != nil {
		t.Fatal(err)
	}
	_, err = writer.Write([]byte("aaaaaaaaaa"))
	if err != nil {
		t.Fatal(err)
	}
	_, err = writer.Write([]byte("aaaaaaaaaa"))
	if err != nil {
		t.Fatal(err)
	}
	_, err = writer.Write([]byte("aaaaa"))
	if err != nil {
		t.Fatal(err)
	}

// Test for AppendFile.
func TestAppendFile(t *testing.T) {
	f, err := os.CreateTemp(t.TempDir(), "")
	if err != nil {
		t.Fatal(err)
	}
	name1 := f.Name()
	defer os.Remove(name1)
	f.WriteString("aaaaaaaaaa")
	f.Close()

	f, err = os.CreateTemp(t.TempDir(), "")
	if err != nil {
		t.Fatal(err)
	}
	name2 := f.Name()
	defer os.Remove(name2)
	f.WriteString("bbbbbbbbbb")
	f.Close()

        Supplier<Object> supplier = () -> longString;

        monitorTarget.append(buf, "longKey", supplier);
        assertTrue(buf.toString().startsWith("\"longKey\":\""));
        assertTrue(buf.toString().contains("aaaaaaaaaa"));
        assertEquals(10000 + "\"longKey\":\"\"".length(), buf.toString().length());
    }

    // Test append with Unicode characters
    @Test
    public void test_append_unicodeCharacters() {

     * fit comfortably within a single ethernet packet (1500 bytes) even with framing overhead.
     *
     * For tests this must be big enough to realize real compression on test messages like
     * 'aaaaaaaaaa...'. Our tests check if compression was applied just by looking at the size if
     * the inbound buffer.
     */
    const val DEFAULT_MINIMUM_DEFLATE_SIZE = 1024L
  }