### Question:
CardHolder implements Cloneable, Serializable, Loggeable { public boolean isValidCRC () { return isValidCRC(this.pan); } CardHolder();  CardHolder(String track2);  CardHolder(String pan, String exp);  CardHolder(ISOMsg m); void parseTrack2(String s); void setTrack1(String track1); String getTrack1(); boolean hasTrack1(); String getNameOnCard(); String getTrack2(); boolean hasTrack2(); void setSecurityCode(String securityCode); String getSecurityCode(); boolean hasSecurityCode(); @SuppressWarnings("unused") String getTrailler(); @SuppressWarnings("unused") void setTrailler(String trailer); String getTrailer(); void setTrailer(String trailer); void setPAN(String pan); String getPAN(); String getBIN(); void setEXP(String exp); String getEXP(); boolean isExpired(); boolean isExpired(Date currentDate); boolean isValidCRC(); static boolean isValidCRC(String p); void dump(PrintStream p, String indent); String getServiceCode(); boolean seemsManualEntry(); @Override int hashCode(); @Override boolean equals(Object obj);  }### Answer:
@Test public void testIsValidCRC() throws Throwable { boolean result = new CardHolder("k'X9|DH:!;uQ<kG8!P?- ,\"Y!u`r;jB^)>3AbS9,").isValidCRC(); assertFalse(result, "result"); }
@Test public void testIsValidCRC1() throws Throwable { boolean result = CardHolder.isValidCRC("42"); assertTrue(result, "result"); }
@Test public void testIsValidCRC2() throws Throwable { boolean result = CardHolder.isValidCRC("0"); assertTrue(result, "result"); }
@Test public void testIsValidCRC3() throws Throwable { boolean result = CardHolder.isValidCRC(""); assertTrue(result, "result"); }
@Test public void testIsValidCRC4() throws Throwable { boolean result = CardHolder.isValidCRC("1"); assertFalse(result, "result"); }
@Test public void testIsValidCRC5() throws Throwable { boolean result = CardHolder.isValidCRC("testCardHolderp"); assertFalse(result, "result"); }
@Test public void testIsValidCRC6() throws Throwable { boolean result = CardHolder.isValidCRC("41CharactersXXXXXXXXXXXXXXXXXXXXXXXXXXXXX"); assertFalse(result, "result"); }
@Test public void testIsValidCRC7() throws Throwable { boolean result = CardHolder.isValidCRC("2C"); assertFalse(result, "result"); }
@Test public void testIsValidCRCThrowsNullPointerException() throws Throwable { try { new CardHolder().isValidCRC(); fail("Expected NullPointerException to be thrown"); } catch (NullPointerException ex) { if (isJavaVersionAtMost(JAVA_14)) { assertNull(ex.getMessage(), "ex.getMessage()"); } else { assertEquals("Cannot invoke \"String.length()\" because \"p\" is null", ex.getMessage(), "ex.getMessage()"); } } }
@Test public void testIsValidCRCThrowsNullPointerException1() throws Throwable { try { CardHolder.isValidCRC(null); fail("Expected NullPointerException to be thrown"); } catch (NullPointerException ex) { if (isJavaVersionAtMost(JAVA_14)) { assertNull(ex.getMessage(), "ex.getMessage()"); } else { assertEquals("Cannot invoke \"String.length()\" because \"p\" is null", ex.getMessage(), "ex.getMessage()"); } } }