in src/main/java/org/apache/sling/testing/mock/jcr/MockPrincipalManager.java [148:159]
public boolean hasPrincipal(@NotNull String principalName) {
boolean value = false;
try {
value = mockUserManager.getAuthorizable(principalName) != null;
} catch (RepositoryException e) {
// ignore and log
if (logger.isDebugEnabled()) {
logger.debug("Failed to determine principal exists", e);
}
}
return value;
}