Ticket #17165: unit-meta-query.php

<?php

add_action('template_redirect', function() {
        global $wpdb;

        assert_options(ASSERT_ACTIVE, 1);
        assert_options(ASSERT_QUIET_EVAL, 1);
        assert_options(ASSERT_WARNING, 0);
        assert_options(ASSERT_CALLBACK, function ($file, $line, $code) use ( &$failed ) {
                echo "Failed: $file (line $line)<hr />";
        });

        $mq = new WP_Meta_Query;

        // 'meta_key' & 'meta_value' = 0
        $qv = array(
                'meta_key' => 'foo',
                'meta_value' => 0,
        );

        $expected = array(
                array(
                        'key' => 'foo',
                        'value' => '0'
                )
        );

        $mq->parse_query_vars( $qv );
        assert( $mq->queries == $expected );

        $expected = " AND wp_postmeta.meta_key = 'foo' AND CAST(wp_postmeta.meta_value AS CHAR) = '0'";

        $clauses = $mq->get_sql( 'post', $wpdb->posts, 'ID' );
        assert( $clauses['where'] == $expected );

        // Only 'meta_key' (meta_value should be ignored)
        $qv = array(
                'meta_key' => 'foo',
                'meta_value' => '',
        );

        $expected = array(
                array(
                        'key' => 'foo',
                )
        );

        $mq->parse_query_vars( $qv );
        assert( $mq->queries == $expected );

        $expected = " AND wp_postmeta.meta_key = 'foo'";

        $clauses = $mq->get_sql( 'post', $wpdb->posts, 'ID' );
        assert( $clauses['where'] == $expected );

        // 'key' and 'value' (value should _not_ be ignored)
        $meta_query = array(
                array(
                        'key' => 'foo',
                        'value' => '',
                        'compare' => '!='
                )
        );

        $expected = " AND wp_postmeta.meta_key = 'foo' AND CAST(wp_postmeta.meta_value AS CHAR) != ''";

        $clauses = get_meta_sql( $meta_query, 'post', $wpdb->posts, 'ID' );
        assert( $clauses['where'] == $expected );

        // empty 'value' with 'IN' comparison ('value' should not be ignored)
        $meta_query = array(
                array(
                        'key' => 'foo',
                        'value' => '0',
                        'compare' => 'NOT IN',
                )
        );

        $expected = " AND wp_postmeta.meta_key = 'foo' AND CAST(wp_postmeta.meta_value AS CHAR) NOT IN ('0')";

        $clauses = get_meta_sql( $meta_query, 'post', $wpdb->posts, 'ID' );
        assert( $clauses['where'] == $expected );
});