private static void verifyParam(final Map<String, List<String>> params, final String paramName, final String expectedParamValue) {
        assertTrue(params.containsKey(paramName), () -> "Expected " + paramName + "  param in redirect URL");
        assertEquals(1,
            params
                .get(paramName)
                .size(),
            () -> "Expected one value for " + paramName + " param");
        assertEquals(expectedParamValue,
            params
                .get(paramName)
                .getFirst(),
            () -> "Expected unchanged " + paramName + "  param");
    }
This is {@link OAuth20TokenAuthorizationResponseBuilderTests}.

@author David Albrecht
@since 6.1.3
support/cas-server-support-oauth/src/test/java/org/apereo/cas/support/oauth/web/response/callback/OAuth20TokenAuthorizationResponseBuilderTests.java