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// FUNCTIONS.PHP
// create shortcode to list all clothes which come in blue
add_shortcode( 'list-posts', 'rmcc_post_listing_shortcode1' );
function rmcc_post_listing_shortcode1( $atts ) {
    ob_start();


    // define attributes and their defaults
    extract( shortcode_atts( array (
        'type' => 'post',
        'order' => 'DESC',
        'orderby' => 'date',
        'posts' => '',
        'category' => '',
        'paged' => ''
    ), $atts ) );

	if ( get_query_var('paged') ) { $paged = get_query_var('paged'); } else if ( get_query_var('page') ) {$paged = get_query_var('page'); } else {$paged = 1; }
    $temp = $wp_query;  // re-sets query
	$wp_query = null;   // re-sets query
    // define query parameters based on attributes
    $args = array(
        'post_type' => $type,
        'order' => $order,
        'orderby' => $orderby,
        'posts_per_page' => $posts,
        'category_name' => $category,
        'paged' => $paged
    );
    $wp_query = new WP_Query( $args );
    //$query = new WP_Query( $options );
    // run the loop based on the query

    if ( $wp_query->have_posts() ) { 
    	
	    	$obj = get_post_type_object( $type );
			$template = $obj->labels->name;
			$tmpl = $template . '-tmpl.php';
			//echo $tmpl;
			include $tmpl;
		
    $myvariable = ob_get_clean();
    return $myvariable;
    }
}
// posts-tmpl.php
<?php while ( $wp_query->have_posts() ) : $wp_query->the_post(); ?>
	<article class="testimonials-article gray-full-width">
	  <?php echo get_the_post_thumbnail( $post_id, 'full', array( 'class' => 'alignleft' ) ); ?>
	  <blockquote>
	    <?php the_content();?>
	  </blockquote>
	  <p><i><?php the_title();?></i></p>
	</article>
<?php endwhile;
wp_reset_postdata(); ?>