1. use method call.php

<?php
class Describe_context_lookup extends SimpleSpec {
    function prepare() {
        $this->context = create_context(array(
            'location'  => (object) array(
                'address' => '1st Jones St',
                'city' => 'Marry hill', 'state' => 'NSW', 
                'postcode' => 2320
            ),
            'document'  => new Document(
                'my business report', 
                'Since Augest 2005, financial projection has..'
            )
        ));
    }
    
    function should_use_dot_to_access_object_property() {
        $c = $this->context;
        $this->expect($c->resolve(':location.address'))->should_be('1st Jones St');
        $this->expect($c->resolve(':document.title'))->should_be('my business report');
    }
    
    function should_return_null_for_undefined_or_private_object_property() {
        $c = $this->context;
        $this->expect($c->resolve(':document.uuid'))->should_be_null();   // Private
        $this->expect($c->resolve(':document.undefined_property'))->should_be_null();
    }

    function should_use_dot_to_perform_method_call() {
        $c = $this->context;
        $this->expect($c->resolve(':document.to_pdf'))->should_match('/PDF Version :/');
        $this->expect($c->resolve(':document.to_xml'))->should_match('/<title>my business report<\/title>/');
    }
    
    function should_return_null_for_undefined_or_private_method_call() {
        $c = $this->context;
        $this->expect($c->resolve(':document._secret'))->should_be_null();   // Private
        $this->expect($c->resolve(':document.undefined_method'))->should_be_null();
    }

    function should_use_dot_to_lookup_additional_array_methods() {
        $c = $this->context;
        $this->expect($c->resolve(':hobbies.first'))->should_be('football');
        $this->expect($c->resolve(':hobbies.last'))->should_be('swimming');
        $this->expect($c->resolve(':hobbies.length'))->should_be(3);
        $this->expect($c->resolve(':hobbies.size'))->should_be(3);
        $this->expect($c->resolve(':numbers.length'))->should_be(9);
    }
}
?>

2. use array interface shortcut.php

<?php
class Describe_context_lookup extends SimpleSpec {
    
    function should_use_dot_to_access_object_property() {
        $c = create_context(array(
            'location' => (object) array(
                'address' => '1st Jones St',
                'city' => 'Marry hill', 'state' => 'NSW', 
                'postcode' => 2320
            ),
        ));
        $this[$c->resolve(':location.address')]->should_be('1st Jones St');
        $this[$c->resolve(':location.city')]->should_be('Marry hill');
    }
    
    function should_return_null_for_undefined_or_private_object_property() {
        $c = create_context(array(
            'document' => new Document(
                'my business report', 
                'Since Augest 2005, financial projection has..'
            )
        ));
        $this[$c->resolve(':document.uuid')]->should_be_null();   // Private
        $this[$c->resolve(':document.undefined_property')]->should_be_null();
    }

    function should_use_dot_to_perform_method_call() {
        $c = create_context(array(
            'document' => new Document(
                'my business report', 
                'Since Augest 2005, financial projection has..'
            )
        ));
        
        $this[$c->resolve(':document.to_pdf')]->should_match('/PDF Version :/');
        $this[$c->resolve(':document.to_xml')]->should_match('/<title>my business report<\/title>/');
    }
    
    function should_return_null_for_undefined_or_private_method_call() {
        $c = create_context(array(
            'document' => new Document(
                'my business report', 
                'Since Augest 2005, financial projection has..'
            )
        ));
        
        $this[$c->resolve(':document._secret')]->should_be_null();   // Private
        $this[$c->resolve(':document.undefined_method')]->should_be_null();
    }
}
?>

3. use expects function and a bit of debug_backtrace() .php

<?php
class Describe_context_lookup extends SimpleSpec {
    function prepare() {
        $this->context = create_context(array(
            'location'  => (object) array(
                'address' => '1st Jones St',
                'city' => 'Marry hill', 'state' => 'NSW', 
                'postcode' => 2320
            ),
            'document'  => new Document(
                'my business report', 
                'Since Augest 2005, financial projection has..'
            )
        ));
    }
    
    function should_use_dot_to_access_object_property() {
        $c = $this->context;
        expects($c->resolve(':location.address'))->should_be('1st Jones St');
        expects($c->resolve(':document.title'))->should_be('my business report');
    }
    
    function should_return_null_for_undefined_or_private_object_property() {
        $c = $this->context;
        expects($c->resolve(':document.uuid'))->should_be_null();   // Private
        expects($c->resolve(':document.undefined_property'))->should_be_null();
    }

    function should_use_dot_to_perform_method_call() {
        $c = $this->context;
        expects($c->resolve(':document.to_pdf'))->should_match('/PDF Version :/');
        expects($c->resolve(':document.to_xml'))->should_match('/<title>my business report<\/title>/');
    }
    
    function should_return_null_for_undefined_or_private_method_call() {
        $c = $this->context;
        expects($c->resolve(':document._secret'))->should_be_null();   // Private
        expects($c->resolve(':document.undefined_method'))->should_be_null();
    }

    function should_use_dot_to_lookup_additional_array_methods() {
        $c = $this->context;
        expects($c->resolve(':hobbies.first'))->should_be('football');
        expects($c->resolve(':hobbies.last'))->should_be('swimming');
        expects($c->resolve(':hobbies.length'))->should_be(3);
        expects($c->resolve(':hobbies.size'))->should_be(3);
        expects($c->resolve(':numbers.length'))->should_be(9);
    }
}
?>