@Test
    void testIsBlank() {
        assertTrue(Utils.isBlank(null));
        assertTrue(Utils.isBlank(""));
        assertTrue(Utils.isBlank(" "));
        assertFalse(Utils.isBlank("bob"));
        assertFalse(Utils.isBlank(" bob "));
    }
Expectation setter for multiple reads where each one reads random bytes to the buffer.

@param channelMock           The mocked FileChannel object
@param bufferSize            The buffer size
@return Expected buffer string
@throws IOException          If an I/O error occurs
clients/src/test/java/org/apache/kafka/common/utils/UtilsTest.java