diff --git a/ts/docx/document/index.ts b/ts/docx/document/index.ts
index cffa5f17d2..de8f3f0053 100644
--- a/ts/docx/document/index.ts
+++ b/ts/docx/document/index.ts
@@ -33,9 +33,4 @@ export class Document extends XmlComponent {
     public addParagraph(paragraph: Paragraph): void {
         this.body.push(paragraph);
     }
-
-    public clearVariables(): void {
-        this.body.clearVariables();
-        delete this.body;
-    }
 }
diff --git a/ts/docx/run/text.ts b/ts/docx/run/text.ts
index 68019098d4..745c605094 100644
--- a/ts/docx/run/text.ts
+++ b/ts/docx/run/text.ts
@@ -1,9 +1,11 @@
-import { XmlUnitComponent } from "../xml-components";
+import { XmlComponent } from "../xml-components";
 
-export class Text extends XmlUnitComponent {
+export class Text extends XmlComponent {
 
     constructor(text: string) {
         super("w:t");
-        this.root = text;
+        if (text) {
+            this.root.push(text);
+        }
     }
 }
diff --git a/ts/docx/xml-components/base.ts b/ts/docx/xml-components/base.ts
index 0fb1811bf4..cc20f27cb2 100644
--- a/ts/docx/xml-components/base.ts
+++ b/ts/docx/xml-components/base.ts
@@ -5,9 +5,5 @@ export abstract class BaseXmlComponent {
         this.rootKey = rootKey;
     }
 
-    public abstract replaceKey(): void;
-
-    public clearVariables(): void {
-        // Do Nothing
-    }
+    public abstract toXml(): object;
 }
diff --git a/ts/docx/xml-components/default-attributes.ts b/ts/docx/xml-components/default-attributes.ts
index 02b873f8f1..ec2641fb66 100644
--- a/ts/docx/xml-components/default-attributes.ts
+++ b/ts/docx/xml-components/default-attributes.ts
@@ -2,10 +2,10 @@ import * as _ from "lodash";
 import { BaseXmlComponent } from "./base";
 
 export abstract class XmlAttributeComponent extends BaseXmlComponent {
-    protected root: Object;
-    private xmlKeys: Object;
+    protected root: object;
+    private xmlKeys: object;
 
-    constructor(xmlKeys: Object, properties: Object) {
+    constructor(xmlKeys: object, properties: object) {
         super("_attr");
         this.xmlKeys = xmlKeys;
 
@@ -16,15 +16,18 @@ export abstract class XmlAttributeComponent extends BaseXmlComponent {
         }
     }
 
-    public replaceKey(): void {
-        if (this.root !== undefined) {
+    public toXml(): object {
+        const attrs = {};
+        if (this.root != undefined) {
             _.forOwn(this.root, (value, key) => {
-                const newKey = this.xmlKeys[key];
-                this.root[newKey] = value;
-                delete this.root[key];
+                if (value != undefined) {
+                    const newKey = this.xmlKeys[key];
+                    attrs[newKey] = value;
+                }
             });
-            this[this.rootKey] = this.root;
-            delete this.root;
         }
+        const ret = {};
+        ret[this.rootKey] = attrs;
+        return ret;
     }
 }
diff --git a/ts/docx/xml-components/index.ts b/ts/docx/xml-components/index.ts
index 07ef8f7363..7e049df6a7 100644
--- a/ts/docx/xml-components/index.ts
+++ b/ts/docx/xml-components/index.ts
@@ -1,30 +1,27 @@
 import * as _ from "lodash";
 import { BaseXmlComponent } from "./base";
+export { BaseXmlComponent };
 
 export abstract class XmlComponent extends BaseXmlComponent {
-    protected root: BaseXmlComponent[];
+    protected root: Array<BaseXmlComponent | string>;
 
     constructor(rootKey: string) {
         super(rootKey);
         this.root = new Array<BaseXmlComponent>();
     }
 
-    public replaceKey(): void {
-        // console.log(this.rootKey);
-        // console.log(this.root);
-        if (this.root !== undefined) {
-            this.root.forEach((root) => {
-                if (root && root instanceof BaseXmlComponent) {
-                    root.replaceKey();
-                }
-            });
-            this[this.rootKey] = this.root;
-            delete this.root;
+    public toXml(): object {
+        const ret = this.root.map((comp) => {
+            if (comp instanceof BaseXmlComponent) {
+                return comp.toXml();
+            }
+            return comp
+        }).filter((comp) => comp); // Exclude null, undefined, and empty strings
+        return {
+            [this.rootKey]: ret,
         }
     }
 }
 
 export * from "./attributes"
 export * from "./default-attributes";
-export * from "./unit";
-export * from "./property";
diff --git a/ts/docx/xml-components/property.ts b/ts/docx/xml-components/property.ts
deleted file mode 100644
index bfc0cab717..0000000000
--- a/ts/docx/xml-components/property.ts
+++ /dev/null
@@ -1,57 +0,0 @@
-import { ParagraphProperties } from "../paragraph/properties";
-import { RunProperties } from "../run/properties";
-import { XmlComponent } from "./";
-
-export class ParagraphPropertyXmlComponent extends XmlComponent {
-    private paragraphProperties: ParagraphProperties;
-
-    constructor(rootKey: string) {
-        super(rootKey);
-        this.paragraphProperties = new ParagraphProperties();
-        this.root.push(this.paragraphProperties);
-    }
-
-    public clearVariables(): void {
-        this.paragraphProperties.clearVariables();
-
-        delete this.paragraphProperties;
-    }
-}
-
-export class RunPropertyXmlComponent extends XmlComponent {
-    private runProperties: RunProperties;
-
-    constructor(rootKey: string) {
-        super(rootKey);
-        this.runProperties = new RunProperties();
-        this.root.push(this.runProperties);
-    }
-
-    public clearVariables(): void {
-        this.runProperties.clearVariables();
-
-        delete this.runProperties;
-    }
-}
-
-export class MultiPropertyXmlComponent extends XmlComponent {
-    private runProperties: RunProperties;
-    private paragraphProperties: ParagraphProperties;
-
-    constructor(rootKey: string) {
-        super(rootKey);
-        this.runProperties = new RunProperties();
-        this.root.push(this.runProperties);
-
-        this.paragraphProperties = new ParagraphProperties();
-        this.root.push(this.paragraphProperties);
-    }
-
-    public clearVariables(): void {
-        this.runProperties.clearVariables();
-        this.paragraphProperties.clearVariables();
-
-        delete this.runProperties;
-        delete this.paragraphProperties;
-    }
-}
diff --git a/ts/docx/xml-components/unit.ts b/ts/docx/xml-components/unit.ts
deleted file mode 100644
index 604655d230..0000000000
--- a/ts/docx/xml-components/unit.ts
+++ /dev/null
@@ -1,16 +0,0 @@
-import {BaseXmlComponent} from "./base";
-
-export abstract class XmlUnitComponent extends BaseXmlComponent {
-    protected root: string;
-
-    constructor(rootKey: string) {
-        super(rootKey);
-    }
-
-    public replaceKey(): void {
-        if (this.root !== undefined) {
-            this[this.rootKey] = this.root;
-            delete this.root;
-        }
-    }
-}
diff --git a/ts/export/formatter.ts b/ts/export/formatter.ts
index 163e059148..9020e0b293 100644
--- a/ts/export/formatter.ts
+++ b/ts/export/formatter.ts
@@ -1,52 +1,7 @@
-import * as _ from "lodash";
-import {XmlComponent} from "../docx/xml-components";
+import { BaseXmlComponent } from "../docx/xml-components";
 
 export class Formatter {
-
-    public format(input: any): Object {
-        input.clearVariables();
-        this.replaceKeys(input);
-        const newJson = this.clense(input);
-        // console.log(JSON.stringify(newJson, null, "  "));
-        return newJson;
+    public format(input: BaseXmlComponent): any {
+        return input.toXml();
     }
-
-    private replaceKeys(input: XmlComponent): Object {
-        input.replaceKey();
-
-        return input;
-    }
-
-    private clense(input: any): Object {
-        const newJson = this.jsonify(input);
-
-        this.deepTraverseJson(newJson, (parent, value, key) => {
-            if (key === "properties") {
-                delete parent[key];
-            }
-            if (key === "xmlKeys") {
-                delete parent[key];
-            }
-            if (key === "rootKey") {
-                delete parent[key];
-            }
-        });
-
-        return newJson;
-    }
-
-    private jsonify(obj: Object): Object {
-        let stringifiedJson = JSON.stringify(obj);
-        return JSON.parse(stringifiedJson);
-    }
-
-    private deepTraverseJson(json: Object, lambda: (json: any, value: any, key: any) => void): void {
-        _.forOwn(json, (value, key) => {
-            if (_.isObject(value) && key !== "xmlKeys" && key !== "rootKey") {
-                this.deepTraverseJson(value, lambda);
-            }
-            lambda(json, value, key);
-        });
-    }
-
-}
\ No newline at end of file
+}
diff --git a/ts/numbering/abstract-numbering.ts b/ts/numbering/abstract-numbering.ts
index 1a5b4bfffb..f8c3822658 100644
--- a/ts/numbering/abstract-numbering.ts
+++ b/ts/numbering/abstract-numbering.ts
@@ -40,11 +40,4 @@ export class AbstractNumbering extends XmlComponent {
         this.addLevel(level);
         return level;
     }
-
-    public clearVariables(): void {
-        _.forEach(this.root, (element) => {
-            element.clearVariables();
-        });
-        delete this.id;
-    }
 }
diff --git a/ts/numbering/index.ts b/ts/numbering/index.ts
index 828933ae90..06b32b1ab2 100644
--- a/ts/numbering/index.ts
+++ b/ts/numbering/index.ts
@@ -2,12 +2,12 @@ import * as _ from "lodash";
 import { DocumentAttributes } from "../docx/document/document-attributes";
 import { Indent } from "../docx/paragraph/indent";
 import { RunFonts } from "../docx/run/run-fonts";
-import { MultiPropertyXmlComponent } from "../docx/xml-components";
+import { XmlComponent } from "../docx/xml-components";
 import { AbstractNumbering } from "./abstract-numbering";
 import { Level } from "./level";
 import { Num } from "./num";
 
-export class Numbering extends MultiPropertyXmlComponent {
+export class Numbering extends XmlComponent {
     private nextId: number;
 
     constructor() {
@@ -86,12 +86,4 @@ export class Numbering extends MultiPropertyXmlComponent {
         this.root.push(num);
         return num;
     }
-
-    public clearVariables(): void {
-        super.clearVariables();
-        _.forEach(this.root, (element) => {
-            element.clearVariables();
-        });
-        delete this.nextId;
-    }
 }
diff --git a/ts/numbering/level.ts b/ts/numbering/level.ts
index 54937cbf63..2882c20589 100644
--- a/ts/numbering/level.ts
+++ b/ts/numbering/level.ts
@@ -1,6 +1,6 @@
 import { ParagraphProperties } from "../docx/paragraph/properties";
 import { RunProperties } from "../docx/run/properties";
-import { Attributes, MultiPropertyXmlComponent, XmlAttributeComponent, XmlComponent } from "../docx/xml-components";
+import { Attributes, XmlAttributeComponent, XmlComponent } from "../docx/xml-components";
 
 interface ILevelAttributesProperties {
     ilvl?: number;
@@ -80,14 +80,6 @@ export class Level extends XmlComponent {
         this.root.push(this.runProperties);
     }
 
-    public clearVariables(): void {
-        this.paragraphProperties.clearVariables();
-        this.runProperties.clearVariables();
-
-        delete this.paragraphProperties;
-        delete this.runProperties;
-    }
-
     public addParagraphProperty(property: XmlComponent): Level {
         this.paragraphProperties.push(property);
         return this;
diff --git a/ts/numbering/num.ts b/ts/numbering/num.ts
index f127817654..1958b989ac 100644
--- a/ts/numbering/num.ts
+++ b/ts/numbering/num.ts
@@ -34,9 +34,4 @@ export class Num extends XmlComponent {
         this.root.push(new AbstractNumId(abstractNumId));
         this.id = numId;
     }
-
-    public clearVariables(): void {
-        super.clearVariables();
-        delete this.id;
-    }
 }
diff --git a/ts/properties/components.ts b/ts/properties/components.ts
index 5f25767a96..d5e1b7fc01 100644
--- a/ts/properties/components.ts
+++ b/ts/properties/components.ts
@@ -1,66 +1,64 @@
 import { DocumentAttributes } from "../docx/document/document-attributes";
-import { XmlUnitComponent } from "../docx/xml-components";
 import { XmlComponent } from "../docx/xml-components";
 
-export class Title extends XmlUnitComponent {
+export class Title extends XmlComponent {
 
     constructor(value: string) {
         super("dc:title");
-        this.root = value;
+        this.root.push(value);
     }
 }
 
-export class Subject extends XmlUnitComponent {
+export class Subject extends XmlComponent {
 
     constructor(value: string) {
         super("dc:subject");
-        this.root = value;
+        this.root.push(value);
     }
 }
 
-export class Creator extends XmlUnitComponent {
+export class Creator extends XmlComponent {
 
     constructor(value: string) {
         super("dc:creator");
-        this.root = value;
+        this.root.push(value);
     }
 }
 
-export class Keywords extends XmlUnitComponent {
+export class Keywords extends XmlComponent {
 
     constructor(value: string) {
         super("cp:keywords");
-        this.root = value;
+        this.root.push(value);
     }
 }
 
-export class Description extends XmlUnitComponent {
+export class Description extends XmlComponent {
 
     constructor(value: string) {
         super("dc:description");
-        this.root = value;
+        this.root.push(value);
     }
 }
 
-export class LastModifiedBy extends XmlUnitComponent {
+export class LastModifiedBy extends XmlComponent {
 
     constructor(value: string) {
         super("cp:lastModifiedBy");
-        this.root = value;
+        this.root.push(value);
     }
 }
 
-export class Revision extends XmlUnitComponent {
+export class Revision extends XmlComponent {
 
     constructor(value: string) {
         super("cp:revision");
-        const revision = value;
-        this.root = value;
+        this.root.push(value);
     }
 }
 
 abstract class DateComponent extends XmlComponent {
-    protected getCurrentDate(): any {
+    protected getCurrentDate(): string {
         const date = new Date();
         const year = date.getFullYear();
         const month = ("0" + (date.getMonth() + 1)).slice(-2);
diff --git a/ts/properties/index.ts b/ts/properties/index.ts
index cbda98a13d..22067d1caa 100644
--- a/ts/properties/index.ts
+++ b/ts/properties/index.ts
@@ -23,13 +23,27 @@ export class Properties extends XmlComponent {
             dcmitype: "http://purl.org/dc/dcmitype/",
             xsi: "http://www.w3.org/2001/XMLSchema-instance",
         }));
-        this.root.push(new Title(options.title));
-        this.root.push(new Subject(options.subject));
-        this.root.push(new Creator(options.creator));
-        this.root.push(new Keywords(options.keywords));
-        this.root.push(new Description(options.description));
-        this.root.push(new LastModifiedBy(options.lastModifiedBy));
-        this.root.push(new Revision(options.revision));
+        if (options.title) {
+            this.root.push(new Title(options.title));
+        }
+        if (options.subject) {
+            this.root.push(new Subject(options.subject));
+        }
+        if (options.creator) {
+            this.root.push(new Creator(options.creator));
+        }
+        if (options.keywords) {
+            this.root.push(new Keywords(options.keywords));
+        }
+        if (options.description) {
+            this.root.push(new Description(options.description));
+        }
+        if (options.lastModifiedBy) {
+            this.root.push(new LastModifiedBy(options.lastModifiedBy));
+        }
+        if (options.revision) {
+            this.root.push(new Revision(options.revision));
+        }
         this.root.push(new Created());
         this.root.push(new Modified());
     }
diff --git a/ts/styles/defaults/index.ts b/ts/styles/defaults/index.ts
index 65737fcc52..065ed785bd 100644
--- a/ts/styles/defaults/index.ts
+++ b/ts/styles/defaults/index.ts
@@ -14,11 +14,4 @@ export class DocumentDefaults extends XmlComponent {
         this.root.push(this.runPropertiesDefaults);
         this.root.push(this.paragraphPropertiesDefaults);
     }
-
-    public clearVariables(): void {
-        this.runPropertiesDefaults.clearVariables();
-        this.paragraphPropertiesDefaults.clearVariables();
-        delete this.runPropertiesDefaults;
-        delete this.paragraphPropertiesDefaults;
-    }
 }
diff --git a/ts/styles/index.ts b/ts/styles/index.ts
index 519ad925e2..c0114c1c54 100644
--- a/ts/styles/index.ts
+++ b/ts/styles/index.ts
@@ -30,12 +30,6 @@ export class Styles extends XmlComponent {
         return this;
     }
 
-    public clearVariables(): void {
-        this.root.forEach((element) => {
-            element.clearVariables();
-        });
-    }
-
     public createParagraphStyle(styleId: string, name?: string): ParagraphStyle {
         const para = new ParagraphStyle(styleId, name);
         this.push(para);
diff --git a/ts/styles/style/index.ts b/ts/styles/style/index.ts
index 840e55b317..e2fae80a75 100644
--- a/ts/styles/style/index.ts
+++ b/ts/styles/style/index.ts
@@ -55,13 +55,6 @@ export class ParagraphStyle extends Style {
         this.root.push(this.runProperties);
     }
 
-    public clearVariables(): void {
-        this.paragraphProperties.clearVariables();
-        this.runProperties.clearVariables();
-        delete this.paragraphProperties;
-        delete this.runProperties;
-    }
-
     public addParagraphProperty(property: XmlComponent): void {
         this.paragraphProperties.push(property);
     }
diff --git a/ts/tests/docx/xml-components/xmlComponentTests.ts b/ts/tests/docx/xml-components/xmlComponentTests.ts
index 28f389e4f4..578a5dc2a4 100644
--- a/ts/tests/docx/xml-components/xmlComponentTests.ts
+++ b/ts/tests/docx/xml-components/xmlComponentTests.ts
@@ -24,13 +24,4 @@ describe("XmlComponent", () => {
             assert.equal(newJson.rootKey, "w:test");
         });
     });
-
-    describe("#replaceKey", () => {
-
-        it("should replace the key to the specified root key", () => {
-            xmlComponent.replaceKey();
-            let newJson = jsonify(xmlComponent);
-            assert.isDefined(newJson["w:test"]);
-        });
-    });
-});
\ No newline at end of file
+});
diff --git a/ts/tests/docx/xml-components/xmlUnitTests.ts b/ts/tests/docx/xml-components/xmlUnitTests.ts
deleted file mode 100644
index 313d8916d2..0000000000
--- a/ts/tests/docx/xml-components/xmlUnitTests.ts
+++ /dev/null
@@ -1,36 +0,0 @@
-import { XmlUnitComponent } from "../../../docx/xml-components";
-import { assert } from "chai";
-
-function jsonify(obj: Object) {
-    let stringifiedJson = JSON.stringify(obj);
-    return JSON.parse(stringifiedJson);
-}
-
-class TestComponent extends XmlUnitComponent {
-
-}
-
-describe("XmlUnitComponent", () => {
-    let xmlComponent: TestComponent;
-
-    beforeEach(() => {
-        xmlComponent = new TestComponent("w:test");
-    });
-
-    describe("#constructor()", () => {
-
-        it("should create an Xml Component which has the correct rootKey", () => {
-            let newJson = jsonify(xmlComponent);
-            assert.equal(newJson.rootKey, "w:test");
-        });
-    });
-
-    describe("#replaceKey", () => {
-
-        it("should not replace the key to the specified root key as root is null", () => {
-            xmlComponent.replaceKey();
-            let newJson = jsonify(xmlComponent);
-            assert.isUndefined(newJson["w:test"]);
-        });
-    });
-});
\ No newline at end of file
diff --git a/ts/tests/export/formatterTest.ts b/ts/tests/export/formatterTest.ts
index 8986c2472c..ce7714050b 100644
--- a/ts/tests/export/formatterTest.ts
+++ b/ts/tests/export/formatterTest.ts
@@ -1,11 +1,12 @@
-import { Formatter } from "../../export/formatter";
-import * as docx from "../../docx";
-import { Attributes } from "../../docx/xml-components";
-import { Properties } from "../../properties";
 import { assert } from "chai";
 
-function jsonify(obj: Object) {
-    let stringifiedJson = JSON.stringify(obj);
+import * as docx from "../../docx";
+import { Attributes } from "../../docx/xml-components";
+import { Formatter } from "../../export/formatter";
+import { Properties } from "../../properties";
+
+function jsonify(obj: object): any {
+    const stringifiedJson = JSON.stringify(obj);
     return JSON.parse(stringifiedJson);
 }
 
@@ -18,59 +19,56 @@ describe("Formatter", () => {
 
     describe("#format()", () => {
         it("should format simple paragraph", () => {
-            let paragraph = new docx.Paragraph();
-            let newJson = formatter.format(paragraph);
-            newJson = jsonify(newJson);
+            const paragraph = new docx.Paragraph();
+            const newJson = formatter.format(paragraph);
             assert.isDefined(newJson["w:p"]);
         });
 
         it("should remove xmlKeys", () => {
-            let paragraph = new docx.Paragraph();
-            let newJson = formatter.format(paragraph);
-            let stringifiedJson = JSON.stringify(newJson);
+            const paragraph = new docx.Paragraph();
+            const newJson = formatter.format(paragraph);
+            const stringifiedJson = JSON.stringify(newJson);
             assert(stringifiedJson.indexOf("xmlKeys") < 0);
         });
 
         it("should format simple paragraph with bold text", () => {
-            let paragraph = new docx.Paragraph();
+            const paragraph = new docx.Paragraph();
             paragraph.addText(new docx.TextRun("test").bold());
-            let newJson = formatter.format(paragraph);
-            newJson = jsonify(newJson);
-            assert.isDefined(newJson["w:p"][1]["w:r"][0]["w:rPr"][0]["w:b"][0]["_attr"]["w:val"]);
+            const newJson = formatter.format(paragraph);
+            assert.isDefined(newJson["w:p"][1]["w:r"][0]["w:rPr"][0]["w:b"][0]._attr["w:val"]);
         });
 
         it("should format attributes (rsidSect)", () => {
-            let attributes = new Attributes({
-                rsidSect: "test2"
+            const attributes = new Attributes({
+                rsidSect: "test2",
             });
             let newJson = formatter.format(attributes);
             newJson = jsonify(newJson);
-            assert.isDefined(newJson["_attr"]["w:rsidSect"]);
+            assert.isDefined(newJson._attr["w:rsidSect"]);
         });
 
         it("should format attributes (val)", () => {
-            let attributes = new Attributes({
-                val: "test"
+            const attributes = new Attributes({
+                val: "test",
             });
             let newJson = formatter.format(attributes);
             newJson = jsonify(newJson);
-            assert.isDefined(newJson["_attr"]["w:val"]);
+            assert.isDefined(newJson._attr["w:val"]);
         });
 
         it("should should change 'p' tag into 'w:p' tag", () => {
-            let paragraph = new docx.Paragraph();
-            let newJson = formatter.format(paragraph);
+            const paragraph = new docx.Paragraph();
+            const newJson = formatter.format(paragraph);
             assert.isDefined(newJson["w:p"]);
         });
 
         it("should format Properties object correctly", () => {
-            let properties = new Properties({
+            const properties = new Properties({
                 title: "test document",
-                creator: "Dolan"
+                creator: "Dolan",
             });
-            let newJson = formatter.format(properties);
-            newJson = jsonify(newJson);
+            const newJson = formatter.format(properties);
             assert.isDefined(newJson["cp:coreProperties"]);
         });
     });
-});
\ No newline at end of file
+});
diff --git a/ts/tests/numberingTest.ts b/ts/tests/numberingTest.ts
index 7b562567a8..1d79475b17 100644
--- a/ts/tests/numberingTest.ts
+++ b/ts/tests/numberingTest.ts
@@ -65,7 +65,10 @@ describe("Numbering", () => {
             const n = numbering.createConcreteNumbering(a2);
             expect(n).to.be.instanceof(Num);
             const tree = new Formatter().format(numbering);
-            expect(n.id).to.equal(a2.id);
+            const serializedN = tree["w:numbering"].find(
+                (obj) => obj["w:num"] && obj["w:num"][0]._attr["w:numId"] === n.id
+            );
+            expect(serializedN["w:num"][1]["w:abstractNumId"][0]._attr["w:val"]).to.equal(a2.id);
         });
 
         it("assigns a unique ID to each concrete numbering it creates", () => {
diff --git a/ts/tests/propertiesTest.ts b/ts/tests/propertiesTest.ts
index 0c56ccd13c..c11505381d 100644
--- a/ts/tests/propertiesTest.ts
+++ b/ts/tests/propertiesTest.ts
@@ -1,25 +1,74 @@
-import { Properties } from "../properties";
-import { assert } from "chai";
+import { expect } from "chai";
 
-function jsonify(obj: Object) {
-    let stringifiedJson = JSON.stringify(obj);
-    return JSON.parse(stringifiedJson);
-}
+import { Formatter } from "../export/formatter";
+import { Properties } from "../properties";
 
 describe("Properties", () => {
-    let properties: Properties;
-
-    beforeEach(() => {
-
-    });
 
     describe("#constructor()", () => {
-        it("should create properties with a title", () => {
-            properties = new Properties({
-                title: "test document"
+        it("sets the appropriate attributes on the top-level", () => {
+            const properties = new Properties({});
+            const tree = new Formatter().format(properties);
+            expect(Object.keys(tree)).to.deep.equal(["cp:coreProperties"]);
+            expect(tree["cp:coreProperties"]).to.be.an.instanceof(Array);
+            expect(tree["cp:coreProperties"][0]).to.deep.equal({
+                _attr: {
+                    "xmlns:cp": "http://schemas.openxmlformats.org/package/2006/metadata/core-properties",
+                    "xmlns:dc": "http://purl.org/dc/elements/1.1/",
+                    "xmlns:dcmitype": "http://purl.org/dc/dcmitype/",
+                    "xmlns:dcterms": "http://purl.org/dc/terms/",
+                    "xmlns:xsi": "http://www.w3.org/2001/XMLSchema-instance",
+                },
             });
-            let newJson = jsonify(properties);
-            assert(newJson.root[1].root === "test document");
+        });
+
+        it("should create properties with a title", () => {
+            const properties = new Properties({title: "test document"});
+            const tree = new Formatter().format(properties);
+            expect(Object.keys(tree)).to.deep.equal(["cp:coreProperties"]);
+            expect(tree["cp:coreProperties"]).to.be.an.instanceof(Array);
+            expect(Object.keys(tree["cp:coreProperties"][0])).to.deep.equal(["_attr"]);
+            expect(tree["cp:coreProperties"][1]).to.deep.equal(
+                {"dc:title": ["test document"]},
+            );
+        });
+
+        it("should create properties with all the attributes given", () => {
+            const properties = new Properties({
+                title: "test document",
+                subject: "test subject",
+                creator: "me",
+                keywords: "test docx",
+                description: "testing document",
+                lastModifiedBy: "the author",
+                revision: "123",
+            });
+            const tree = new Formatter().format(properties);
+            expect(Object.keys(tree)).to.deep.equal(["cp:coreProperties"]);
+            expect(tree["cp:coreProperties"]).to.be.an.instanceof(Array);
+            const key = (obj) => Object.keys(obj)[0];
+            const props = tree["cp:coreProperties"].map(key).sort();
+            expect(props).to.deep.equal([
+                "_attr",
+                "cp:keywords",
+                "cp:lastModifiedBy",
+                "cp:revision",
+                "dc:creator",
+                "dc:description",
+                "dc:subject",
+                "dc:title",
+                "dcterms:created",
+                "dcterms:modified",
+            ]);
+            expect(tree["cp:coreProperties"].slice(1, -2).sort((a, b) => key(a) < key(b) ? -1 : 1)).to.deep.equal([
+                {"cp:keywords": ["test docx"]},
+                {"cp:lastModifiedBy": ["the author"]},
+                {"cp:revision": ["123"]},
+                {"dc:creator": ["me"]},
+                {"dc:description": ["testing document"]},
+                {"dc:subject": ["test subject"]},
+                {"dc:title": ["test document"]},
+            ]);
         });
     });
-});
\ No newline at end of file
+});