Merge pull request #29 from asnunes/fix/mmultiscripts

Fix/mmultiscripts

__tests__/index.test.ts

@@ -1222,4 +1222,20 @@ describe('#convert', () => {
 
     expect(result).toBe(expectedLatex);
   });
+
+  it('should correctly convert mmultiscripts with empty mprescripts', () => {
+    const mathml = `
+      <math xmlns="http://www.w3.org/1998/Math/MathML">
+        <mmultiscripts>
+          <mi mathvariant="normal">U</mi>
+          <mprescripts></mprescripts>
+          <mn>238</mn>
+        </mmultiscripts>
+      </math>
+    `;
+
+    const result = MathMLToLaTeX.convert(mathml);
+
+    expect(result).toBe('\\_{238}^{}U');
+  });
 });

package.json

@@ -1,6 +1,6 @@
 {
   "name": "mathml-to-latex",
-  "version": "1.4.2",
+  "version": "1.4.3",
   "description": "A JavaScript tool to convert mathml string to LaTeX string",
   "main": "dist/bundle.min.js",
   "types": "dist/index.d.ts",

src/data/protocols/mathml-element.ts

@@ -4,3 +4,10 @@ export interface MathMLElement {
   readonly children: MathMLElement[];
   attributes: Record<string, string>;
 }
+
+export class VoidMathMLElement implements MathMLElement {
+  readonly name = 'void';
+  readonly value = '';
+  readonly children = [];
+  attributes = {};
+}

src/data/usecases/mathml-to-latex-convertion/converters/index.ts

@@ -20,3 +20,4 @@ export { MTable } from './mtable';
 export { MTr } from './mtr';
 export { GenericSpacingWrapper } from './generic-spacing-wrapper';
 export { GenericUnderOver } from './generic-under-over';
+export { Void } from './void';

src/data/usecases/mathml-to-latex-convertion/converters/void.ts

@@ -0,0 +1,9 @@
+import { ToLaTeXConverter } from 'domain/usecases/to-latex-converter';
+
+export class Void implements ToLaTeXConverter {
+  constructor(private readonly _mathmlElement: MathMLElement) {}
+
+  convert(): string {
+    return '';
+  }
+}

src/data/usecases/mathml-to-latex-convertion/mathml-element-to-latex-converter-adapter.ts

@@ -1,12 +1,12 @@
 import * as ToLatexConverters from './converters';
-import { MathMLElement } from '../../../data/protocols/mathml-element';
+import { MathMLElement, VoidMathMLElement } from '../../../data/protocols/mathml-element';
 import { ToLaTeXConverter, ToLaTeXConverterClass } from '../../../domain/usecases/to-latex-converter';
 
 export class MathMLElementToLatexConverterAdapter {
   private readonly _mathMLElement: MathMLElement;
 
   constructor(mathMLElement: MathMLElement) {
-    this._mathMLElement = mathMLElement;
+    this._mathMLElement = mathMLElement ?? new VoidMathMLElement();
   }
 
   toLatexConverter(): ToLaTeXConverter {
@@ -42,4 +42,5 @@ const fromMathMLElementToLatexConverter: Record<string, ToLaTeXConverterClass> =
   munder: ToLatexConverters.GenericUnderOver,
   mrow: ToLatexConverters.GenericSpacingWrapper,
   mpadded: ToLatexConverters.GenericSpacingWrapper,
+  void: ToLatexConverters.Void,
 };