diff --git a/package.json b/package.json
index 6a8950e..58d3b38 100644
--- a/package.json
+++ b/package.json
@@ -14,10 +14,11 @@
     "coveralls": "*",
     "c8": "*",
     "eslint": "^8.13",
-    "jsdom": "*",
     "jest": "*",
     "jest-environment-jsdom": "*",
+    "jest-fetch-mock": "*",
     "jest-matcher-deep-close-to": "*",
+    "jsdom": "*",
     "pyramid": "file:../pyramid",
     "ramp": "file:../ramp",
     "wedge": "file:../wedge"
diff --git a/src/building.js b/src/building.js
index 3031323..fd8d0e9 100644
--- a/src/building.js
+++ b/src/building.js
@@ -96,15 +96,18 @@ class Building {
   }
 
   /**
-   * build an array of all the lat/long values of the nodes
+   * Extract all nodes from an XML file.
+   *
+   * @param {DOM.Element} fullXmlData - OSM XML with nodes
+   *
+   * @return {Object} dictionary of nodes
    */
   static buildNodeList(fullXmlData) {
     const nodeElements = fullXmlData.getElementsByTagName('node');
     let id = 0;
     var node;
-    var coordinates = [];
-    var nodeList = [];
-    // create a BuildingShape object from the outer and inner elements.
+    let coordinates = [];
+    const nodeList = {};
     for (let j = 0; j < nodeElements.length; j++) {
       node = nodeElements[j];
       id = node.getAttribute('id');
diff --git a/test/building.test.js b/test/building.test.js
new file mode 100644
index 0000000..d2c69f6
--- /dev/null
+++ b/test/building.test.js
@@ -0,0 +1,69 @@
+/**
+ * @jest-environment jsdom
+ */
+
+import { Shape, Mesh } from 'three';
+import { TextEncoder } from 'node:util';
+global.TextEncoder = TextEncoder;
+
+let apis = {
+  bounding: {
+    api:'https://api.openstreetmap.org/api/0.6/map?bbox=',
+    url: (left, bottom, right, top) => {
+      return apis.bounding.api + left + ',' + bottom + ',' + right + ',' + top;
+    },
+  },
+  getRelation: {
+    api:'https://api.openstreetmap.org/api/0.6/relation/',
+    parameters:'/full',
+    url: (relationId) => {
+      return apis.getRelation.api + relationId + apis.getRelation.parameters;
+    },
+  },
+};
+global.apis = apis;
+
+import { Building } from '../src/building.js';
+
+import fetchMock from 'jest-fetch-mock';
+fetchMock.enableMocks();
+
+const data = `
+<osm>
+  <node id="3" lat="4" lon="4"/>
+  <node id="5" lat="4" lon="4.001"/>
+  <node id="6" lat="4.001" lon="4.001"/>
+  <node id="7" lat="4.001" lon="4"/>
+  <relation id="4">
+    <member ref="1" role="outer"/>
+    <tag k="type" v="multipolygon"/>
+    <tag k="building" v="yes"/>
+    <tag k="roof:shape" v="skillion"/>
+    <tag k="roof:direction" v="0"/>
+    <tag k="roof:angle" v="45"/>
+  </relation>
+  <way id="1">
+    <nd ref="3"/>
+    <nd ref="5"/>
+    <nd ref="6"/>
+    <nd ref="7"/>
+    <nd ref="3"/>
+  </way>
+</osm>`;
+
+beforeEach(() => {
+  fetch.resetMocks();
+});
+
+// test('Test Factory', async() => {
+// fetch.mockResponseOnce(data);
+// const shape = await Building.create('relation', '4');
+// expect(fetch).toHaveBeenCalledTimes(2);
+//});
+
+test('Create Nodelist', () => {
+  let xmlData = new window.DOMParser().parseFromString(data, 'text/xml');
+  const list = Building.buildNodeList(xmlData);
+  expect(Object.keys(list).length).toBe(4);
+  expect(list['3']).toStrictEqual(['4', '4']);
+});