### Question:
HttpHeadersTools { public boolean isValidAuth() { if (getBasicString() == null || getBasicUser() == null || getBasicPassword() == null) { return false; } return true; } HttpHeadersTools();  HttpHeadersTools(HttpServletRequest req, HttpServletResponse res); boolean isValidAuth(); boolean isBasicAuth(); HttpServletRequest getReq(); void setReq(HttpServletRequest req); HttpServletResponse getRes(); void setRes(HttpServletResponse res); String getBasicString(); String getBasicUser(); String getBasicPassword(); boolean isHeaderTrue(String name); static Set<String> commastr2set(String valueStr); static String set2commastr(Set<String> values);  }### Answer:
@Test public void testIsValidAuthShouldReturnFalseWhenAuthIsInvalid() { assertFalse(new HttpHeadersTools(noAuthReq, resp).isValidAuth()); assertFalse(new HttpHeadersTools(otherAuthReq, resp).isValidAuth()); assertFalse(new HttpHeadersTools(badBase64, resp).isValidAuth()); assertFalse(new HttpHeadersTools(badUserPassPair, resp).isValidAuth()); }
@Test public void testIsValudAuthShouldReturnTrueWhenAuthIsValid() { assertTrue(new HttpHeadersTools(AuthReq, resp).isValidAuth()); }