@Test
    public void testMissingScopeGoogle() {
        val client = getGoogleClient();
        client.setScope(null);
        TestsHelper.initShouldFail(client, "scope cannot be null");
    }
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