}
    }

    Key searchSessionKey(Subject subject) throws GSSException {
        MIEName src = new MIEName(this.gssContext.getSrcName().export());
        MIEName targ = new MIEName(this.gssContext.getTargName().export());

        ASN1ObjectIdentifier mech = ASN1ObjectIdentifier.getInstance(this.gssContext.getMech().getDER());
        for (KerberosTicket ticket : subject.getPrivateCredentials(KerberosTicket.class)) {

        when(targ.export()).thenReturn(buildExportName(new Oid("1.2.3"), "service"));
        when(gssContext.getSrcName()).thenReturn(src);
        when(gssContext.getTargName()).thenReturn(targ);
        when(gssContext.getMech()).thenReturn(new Oid("1.2.3"));

        assertNull(ctx.searchSessionKey(new javax.security.auth.Subject()));
    }

    @Test

        // ## Arrange ##
        Locale.setDefault(Locale.JAPANESE);
        final NullArgumentException nullArgumentException = new NullArgumentException("hoge");
        assertThat(nullArgumentException.getArgName(), is("hoge"));
        assertThat(nullArgumentException.getMessage(), is("[ECL0008]argument[hoge] is null."));
    }

    /**
     * @throws Exception
     */
    @Test

        this.messageCode = messageCode;
        this.args = args;
    }

    /**
     * Returns the name of the argument.
     *
     * @return Name of the argument
     */
    public String getArgName() {
        return argName;
    }

    /**
     * Returns the message code.
     *
     * @return Message code
     */
    public String getMessageCode() {
        return messageCode;
    }