@Test
public void resolveMissingExtensionDependencyOnNamespace() throws Exception
{

    ExtensionDependency extensionDependency = mock(ExtensionDependency.class);
    doThrow(ResolveException.class).when(this.coreExtensionRepository).resolve(extensionDependency);
    doThrow(ResolveException.class).when(this.localExtensionRepository).resolve(extensionDependency);
    assertNull(this.mocker.getComponentUnderTest().resolveExtension(extensionDependency, "wiki:math"));
}