refactor: expose dependencies of XmlToMathMLAdapter

__test__/converters/xml-mathml-to-mathml/XmlToMathMLAdapter.test.ts

@@ -1,4 +1,9 @@
-import { XmlToMathMLAdapter } from '../../../src/infra/usecases/xmldom-to-mathml-elements';
+import {
+  XmlToMathMLAdapter,
+  ElementsToMathMLAdapter,
+  ErrorHandler,
+} from '../../../src/infra/usecases/xmldom-to-mathml-elements';
+
 import {
   singleMi,
   singleMiNoRoot,
@@ -8,11 +13,18 @@ import {
 } from '../../mocks/mathmlStrings';
 
 describe('#convert', () => {
+  const makeSut = (): XmlToMathMLAdapter => {
+    const elementsToMathMLAdapter = new ElementsToMathMLAdapter();
+    const errorHandler = new ErrorHandler();
+
+    return new XmlToMathMLAdapter(elementsToMathMLAdapter, errorHandler);
+  };
+
   describe('given math string with mi tag', () => {
     it('return array with single mathml interface of name math and child mi', () => {
       const mathmlString = singleMi;
 
-      const result = new XmlToMathMLAdapter(mathmlString).convert();
+      const result = makeSut().convert(mathmlString);
 
       expect(result.length).toBe(1);
       expect(result[0]).toMatchObject({
@@ -28,7 +40,7 @@ describe('#convert', () => {
     test('return array with single mathml interface of name math and child mi', () => {
       const mathmlString = singleMiNoRoot;
 
-      const result = new XmlToMathMLAdapter(mathmlString).convert();
+      const result = makeSut().convert(mathmlString);
 
       expect(result.length).toBe(1);
       expect(result[0]).toMatchObject({
@@ -44,7 +56,7 @@ describe('#convert', () => {
     test('return content in a three and keep value on each child', () => {
       const mathmlString = mrow;
 
-      const result = new XmlToMathMLAdapter(mathmlString).convert();
+      const result = makeSut().convert(mathmlString);
 
       expect(result.length).toBe(1);
       expect(result[0]).toMatchObject({
@@ -71,7 +83,7 @@ describe('#convert', () => {
     test('add attributes to children related with name mfenced', () => {
       const mathmlString = mfencedWithSeparatorAttribute;
 
-      const result = new XmlToMathMLAdapter(mathmlString).convert();
+      const result = makeSut().convert(mathmlString);
 
       expect(result.length).toBe(1);
       expect(result[0]).toMatchObject({
@@ -98,7 +110,7 @@ describe('#convert', () => {
     test('add attributes to children related with name mfenced', () => {
       const mathmlString = mfencedWithBrokenAttribute;
 
-      const result = new XmlToMathMLAdapter(mathmlString).convert();
+      const result = makeSut().convert(mathmlString);
 
       expect(result.length).toBe(1);
       expect(result[0]).toMatchObject({

src/infra/usecases/xmldom-to-mathml-elements/index.ts

@@ -1 +1,3 @@
 export * from './xmldom-to-mathml-element-adapter';
+export * from './error-handler';
+export * from './xmldom-elements-to-mathml-elements-adapter';

src/infra/usecases/xmldom-to-mathml-elements/xmldom-to-mathml-element-adapter.ts

@@ -6,16 +6,14 @@ import { ErrorHandler } from './error-handler';
 import { MathMLElement } from '@/data/protocols/mathml-element';
 
 export class XmlToMathMLAdapter {
-  private _xml: string;
+  private _xml = '';
   private readonly _xmlDOM: DOMParser;
   private readonly _errorHandler: ErrorHandler;
   private readonly _elementsConvertor: ElementsToMathMLAdapter;
 
-  constructor(xml: string) {
-    this._xml = this._removeLineBreaks(xml);
-
-    this._elementsConvertor = new ElementsToMathMLAdapter();
-    this._errorHandler = new ErrorHandler();
+  constructor(elementsConvertor: ElementsToMathMLAdapter, errorHandler: ErrorHandler) {
+    this._elementsConvertor = elementsConvertor;
+    this._errorHandler = errorHandler;
 
     this._xmlDOM = new xmldom.DOMParser({
       locator: this._errorHandler.errorLocator,
@@ -23,7 +21,8 @@ export class XmlToMathMLAdapter {
     });
   }
 
-  convert(): MathMLElement[] {
+  convert(xml: string): MathMLElement[] {
+    this._xml = this._removeLineBreaks(xml);
     return this._elementsConvertor.convert(this._mathMLElements);
   }
 

src/main/factories/index.ts

@@ -0,0 +1 @@
+export * from './make-to-math-elements-converter';

src/main/factories/make-to-math-elements-converter.ts

@@ -0,0 +1,8 @@
+import { XmlToMathMLAdapter, ElementsToMathMLAdapter, ErrorHandler } from '@/infra/usecases/xmldom-to-mathml-elements';
+
+export const makeToMathElementsConverter = (): XmlToMathMLAdapter => {
+  const elementsToMathMLAdapter = new ElementsToMathMLAdapter();
+  const errorHandler = new ErrorHandler();
+
+  return new XmlToMathMLAdapter(elementsToMathMLAdapter, errorHandler);
+};

src/main/mathml-to-latex.ts

@@ -1,9 +1,9 @@
 import { MathMLElementToLatexConverterAdapter } from '@/data/usecases/mathml-to-latex-convertion/mathml-element-to-latex-converter-adapter';
-import { XmlToMathMLAdapter } from '@/infra/usecases/xmldom-to-mathml-elements';
+import { makeToMathElementsConverter } from './factories';
 
 export class MathMLToLaTeX {
   static convert(mathml: string): string {
-    const mathmlElements = new XmlToMathMLAdapter(mathml).convert();
+    const mathmlElements = makeToMathElementsConverter().convert(mathml);
     const mathmlElementsToLaTeXConverters = mathmlElements.map((mathMLElement) =>
       new MathMLElementToLatexConverterAdapter(mathMLElement).toLatexConverter(),
     );