Failing test case for #2309

tests/test-rest-categories-controller.php

@@ -489,6 +489,31 @@ public function test_get_terms_pagination_headers() {
 		$this->assertFalse( stripos( $headers['Link'], 'rel="next"' ) );
 	}
 
+	public function test_get_items_per_page_exceeds_number_of_items() {
+		// Start of the index + Uncategorized default term
+		for ( $i = 0; $i < 17; $i++ ) {
+			$this->factory->category->create( array(
+				'name'   => "Category {$i}",
+				) );
+		}
+		$request = new WP_REST_Request( 'GET', '/wp/v2/categories' );
+		$request->set_param( 'page', 1 );
+		$request->set_param( 'per_page', 100 );
+		$response = $this->server->dispatch( $request );
+		$headers = $response->get_headers();
+		$this->assertEquals( 18, $headers['X-WP-Total'] );
+		$this->assertEquals( 1, $headers['X-WP-TotalPages'] );
+		$this->assertCount( 18, $response->get_data() );
+		$request = new WP_REST_Request( 'GET', '/wp/v2/categories' );
+		$request->set_param( 'page', 2 );
+		$request->set_param( 'per_page', 100 );
+		$response = $this->server->dispatch( $request );
+		$headers = $response->get_headers();
+		$this->assertEquals( 18, $headers['X-WP-Total'] );
+		$this->assertEquals( 1, $headers['X-WP-TotalPages'] );
+		$this->assertCount( 0, $response->get_data() );
+	}
+
 	public function test_get_item() {
 		$request = new WP_REST_Request( 'GET', '/wp/v2/categories/1' );
 		$response = $this->server->dispatch( $request );