private Google2Client getGoogleClient() {
        val google2Client = new Google2Client(KEY, SECRET);
        google2Client.setCallbackUrl(CALLBACK_URL);
        return google2Client;
    }
This class tests the {@link OAuth20Client} class.

@author Jerome Leleu
@since 1.0.0
pac4j-oauth/src/test/java/org/pac4j/oauth/client/OAuth20ClientTests.java