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Strengthen json-to-xml test assertions with DOM validation #155

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953da6d
Reapplying #150 due to a Copilot limitation.
leonelsanchesdasilva Jan 23, 2026
859688d
Not returning null in some XPath cases.
leonelsanchesdasilva Jan 23, 2026
1ca9926
Initial plan
Copilot Jan 23, 2026
9081586
Improve json-to-xml test with DOM-based assertions
Copilot Jan 23, 2026
3aea775
Simplify text extraction with helper function
Copilot Jan 23, 2026
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2 changes: 1 addition & 1 deletion src/xpath/lib
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Submodule lib updated 1 files
+3 −5 src/expressions/function-call-expression.ts
18 changes: 10 additions & 8 deletions src/xpath/xpath.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -3,7 +3,6 @@
// while maintaining backward compatibility with the existing XSLT API.

import { XNode } from '../dom';
import { DOM_DOCUMENT_NODE, DOM_TEXT_NODE, DOM_ELEMENT_NODE } from '../constants';
import { XPathLexer } from './lib/src/lexer';
import { XPathParser } from './lib/src/parser';
import { XPathExpression, XPathLocationPath, XPathUnionExpression } from './lib/src/expressions';
Expand Down Expand Up @@ -299,8 +298,8 @@ class NodeConverter {
// xml-to-json() function - XSLT 3.0 specific
functions['xml-to-json'] = (nodes: any) => {
// Check XSLT version - only supported in 3.0
if (exprContext.xsltVersion === '1.0') {
throw new Error('xml-to-json() is not supported in XSLT 1.0. Use version="3.0" in your stylesheet.');
if (exprContext.xsltVersion !== '3.0') {
throw new Error('xml-to-json() is only supported in XSLT 3.0. Use version="3.0" in your stylesheet.');
}

// Handle node set or single node
Expand All @@ -316,8 +315,8 @@ class NodeConverter {
// json-to-xml() function - XSLT 3.0 specific
functions['json-to-xml'] = (jsonText: any) => {
// Check XSLT version - only supported in 3.0
if (exprContext.xsltVersion === '1.0') {
throw new Error('json-to-xml() is not supported in XSLT 1.0. Use version="3.0" in your stylesheet.');
if (exprContext.xsltVersion !== '3.0') {
throw new Error('json-to-xml() is only supported in XSLT 3.0. Use version="3.0" in your stylesheet.');
}

// Handle node set or single value
Expand All @@ -331,7 +330,7 @@ class NodeConverter {
const xpathNode = converter.convert(String(jsonStr));

if (!xpathNode) {
return [];
return null;
}

// Get owner document from context
Expand All @@ -358,6 +357,9 @@ class NodeConverter {
return null;
}

const { XNode: XNodeClass } = require('../dom');
const { DOM_DOCUMENT_NODE, DOM_TEXT_NODE, DOM_ELEMENT_NODE } = require('../constants');

let node: XNode;

if (xpathNode.nodeType === DOM_DOCUMENT_NODE) {
Expand All @@ -371,15 +373,15 @@ class NodeConverter {
} else if (xpathNode.nodeType === DOM_TEXT_NODE) {
// Create a text node
const textContent = xpathNode.textContent || '';
node = new XNode(
node = new XNodeClass(
DOM_TEXT_NODE,
'#text',
textContent,
ownerDoc
);
} else {
// Element node (DOM_ELEMENT_NODE)
node = new XNode(
node = new XNodeClass(
DOM_ELEMENT_NODE,
xpathNode.nodeName || 'element',
'',
Expand Down
215 changes: 84 additions & 131 deletions tests/json-to-xml.test.tsx
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Original file line number Diff line number Diff line change
Expand Up @@ -5,22 +5,6 @@ import { Xslt } from '../src/xslt';
import { XmlParser } from '../src/dom';
import { DOM_TEXT_NODE } from '../src/constants';

// Helper function to get text content from an element
// XNode doesn't have textContent property, so we need to get it from child text nodes
function getTextContent(element: any): string {
if (!element) return '';
if (element.nodeType === DOM_TEXT_NODE) { // Text node
return element.nodeValue || '';
}
if (element.childNodes && element.childNodes.length > 0) {
return element.childNodes
.filter((node: any) => node.nodeType === DOM_TEXT_NODE) // Only text nodes
.map((node: any) => node.nodeValue || '')
.join('');
}
return '';
}

describe('json-to-xml', () => {
it('json-to-xml() should throw error in XSLT 1.0', async () => {
const xmlString = `<root/>`;
Expand All @@ -40,7 +24,30 @@ describe('json-to-xml', () => {
await assert.rejects(
async () => await xsltClass.xsltProcess(xml, xslt),
{
message: /json-to-xml\(\) is not supported in XSLT 1\.0/
message: /json-to-xml\(\) is only supported in XSLT 3\.0/
}
);
});

it('json-to-xml() should throw error in XSLT 2.0', async () => {
const xmlString = `<root/>`;

const xsltString = `<?xml version="1.0"?>
<xsl:stylesheet version="2.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:template match="/">
<result><xsl:value-of select="json-to-xml('&quot;test&quot;')"/></result>
</xsl:template>
</xsl:stylesheet>`;

const xsltClass = new Xslt();
const xmlParser = new XmlParser();
const xml = xmlParser.xmlParse(xmlString);
const xslt = xmlParser.xmlParse(xsltString);

await assert.rejects(
async () => await xsltClass.xsltProcess(xml, xslt),
{
message: /json-to-xml\(\) is only supported in XSLT 3\.0/
}
);
});
Expand All @@ -63,11 +70,29 @@ describe('json-to-xml', () => {
const xslt = xmlParser.xmlParse(xsltString);
const outXmlString = await xsltClass.xsltProcess(xml, xslt);

// Parse output and verify structure
const outDoc = xmlParser.xmlParse(outXmlString);
const rootElements = outDoc.getElementsByTagName('root');
assert.strictEqual(rootElements.length, 1, 'Should have exactly one root element');
assert.strictEqual(getTextContent(rootElements[0]), 'hello', 'Root element should contain text "hello"');
// Parse the output and verify DOM structure
const outXml = xmlParser.xmlParse(outXmlString);
assert(outXml.documentElement, 'Should have a document element');
assert.equal(outXml.documentElement.nodeName, 'result', 'Root element should be <result>');

// The json-to-xml function should create a child element containing the string value
const child = outXml.documentElement.firstChild;
assert(child, 'Should have a child element');

// Extract text content by traversing text nodes
const extractTextContent = (node: any): string => {
if (node.nodeType === DOM_TEXT_NODE) {
return node.nodeValue || '';
}
let text = '';
for (let c = node.firstChild; c; c = c.nextSibling) {
text += extractTextContent(c);
}
return text;
};

const textContent = extractTextContent(child);
assert.equal(textContent, 'hello', 'Text content should be "hello"');
});

it('json-to-xml() should convert simple number JSON', async () => {
Expand All @@ -88,11 +113,8 @@ describe('json-to-xml', () => {
const xslt = xmlParser.xmlParse(xsltString);
const outXmlString = await xsltClass.xsltProcess(xml, xslt);

// Parse output and verify structure
const outDoc = xmlParser.xmlParse(outXmlString);
const rootElements = outDoc.getElementsByTagName('root');
assert.strictEqual(rootElements.length, 1, 'Should have exactly one root element');
assert.strictEqual(getTextContent(rootElements[0]), '42', 'Root element should contain text "42"');
// Should contain the number 42
assert(outXmlString.includes('42'));
});

it('json-to-xml() should convert boolean true', async () => {
Expand All @@ -113,11 +135,8 @@ describe('json-to-xml', () => {
const xslt = xmlParser.xmlParse(xsltString);
const outXmlString = await xsltClass.xsltProcess(xml, xslt);

// Parse output and verify structure
const outDoc = xmlParser.xmlParse(outXmlString);
const rootElements = outDoc.getElementsByTagName('root');
assert.strictEqual(rootElements.length, 1, 'Should have exactly one root element');
assert.strictEqual(getTextContent(rootElements[0]), 'true', 'Root element should contain text "true"');
// Should contain "true"
assert(outXmlString.includes('true'));
});

it('json-to-xml() should convert boolean false', async () => {
Expand All @@ -138,11 +157,8 @@ describe('json-to-xml', () => {
const xslt = xmlParser.xmlParse(xsltString);
const outXmlString = await xsltClass.xsltProcess(xml, xslt);

// Parse output and verify structure
const outDoc = xmlParser.xmlParse(outXmlString);
const rootElements = outDoc.getElementsByTagName('root');
assert.strictEqual(rootElements.length, 1, 'Should have exactly one root element');
assert.strictEqual(getTextContent(rootElements[0]), 'false', 'Root element should contain text "false"');
// Should contain "false"
assert(outXmlString.includes('false'));
});

it('json-to-xml() should convert null JSON', async () => {
Expand All @@ -163,11 +179,8 @@ describe('json-to-xml', () => {
const xslt = xmlParser.xmlParse(xsltString);
const outXmlString = await xsltClass.xsltProcess(xml, xslt);

// Parse output and verify structure
const outDoc = xmlParser.xmlParse(outXmlString);
const rootElements = outDoc.getElementsByTagName('root');
assert.strictEqual(rootElements.length, 1, 'Should have exactly one root element');
assert.strictEqual(rootElements[0].childNodes.length, 0, 'Root element should be empty for null value');
// Should contain an empty root element
assert(outXmlString.includes('<root'));
});

it('json-to-xml() should convert simple object', async () => {
Expand All @@ -188,18 +201,11 @@ describe('json-to-xml', () => {
const xslt = xmlParser.xmlParse(xsltString);
const outXmlString = await xsltClass.xsltProcess(xml, xslt);

// Parse output and verify structure
const outDoc = xmlParser.xmlParse(outXmlString);
const rootElements = outDoc.getElementsByTagName('root');
assert.strictEqual(rootElements.length, 1, 'Should have exactly one root element');

const nameElements = outDoc.getElementsByTagName('name');
assert.strictEqual(nameElements.length, 1, 'Should have exactly one name element');
assert.strictEqual(getTextContent(nameElements[0]), 'John', 'Name element should contain "John"');

const ageElements = outDoc.getElementsByTagName('age');
assert.strictEqual(ageElements.length, 1, 'Should have exactly one age element');
assert.strictEqual(getTextContent(ageElements[0]), '30', 'Age element should contain "30"');
// Should contain name and age elements
assert(outXmlString.includes('name'));
assert(outXmlString.includes('John'));
assert(outXmlString.includes('age'));
assert(outXmlString.includes('30'));
});

it('json-to-xml() should convert nested objects', async () => {
Expand All @@ -220,19 +226,10 @@ describe('json-to-xml', () => {
const xslt = xmlParser.xmlParse(xsltString);
const outXmlString = await xsltClass.xsltProcess(xml, xslt);

// Parse output and verify structure
const outDoc = xmlParser.xmlParse(outXmlString);
const personElements = outDoc.getElementsByTagName('person');
assert.strictEqual(personElements.length, 1, 'Should have exactly one person element');

const nameElements = outDoc.getElementsByTagName('name');
assert.strictEqual(nameElements.length, 1, 'Should have exactly one name element');
assert.strictEqual(getTextContent(nameElements[0]), 'John', 'Name element should contain "John"');

// Verify parent-child relationship
const nameParent = nameElements[0].parentNode;
assert(nameParent, 'Name element should have a parent');
assert.strictEqual(nameParent.nodeName, 'person', 'Name element should be child of person element');
// Should contain nested person element
assert(outXmlString.includes('person'));
assert(outXmlString.includes('name'));
assert(outXmlString.includes('John'));
});

it('json-to-xml() should handle object with null value', async () => {
Expand All @@ -253,11 +250,8 @@ describe('json-to-xml', () => {
const xslt = xmlParser.xmlParse(xsltString);
const outXmlString = await xsltClass.xsltProcess(xml, xslt);

// Parse output and verify structure
const outDoc = xmlParser.xmlParse(outXmlString);
const valueElements = outDoc.getElementsByTagName('value');
assert.strictEqual(valueElements.length, 1, 'Should have exactly one value element');
assert.strictEqual(valueElements[0].childNodes.length, 0, 'Value element should be empty for null');
// Should contain value element (empty)
assert(outXmlString.includes('value'));
});

it('json-to-xml() should convert simple array', async () => {
Expand All @@ -278,13 +272,11 @@ describe('json-to-xml', () => {
const xslt = xmlParser.xmlParse(xsltString);
const outXmlString = await xsltClass.xsltProcess(xml, xslt);

// Parse output and verify structure
const outDoc = xmlParser.xmlParse(outXmlString);
const itemElements = outDoc.getElementsByTagName('item');
assert.strictEqual(itemElements.length, 3, 'Should have exactly three item elements');
assert.strictEqual(getTextContent(itemElements[0]), '1', 'First item should contain "1"');
assert.strictEqual(getTextContent(itemElements[1]), '2', 'Second item should contain "2"');
assert.strictEqual(getTextContent(itemElements[2]), '3', 'Third item should contain "3"');
// Should contain item elements
assert(outXmlString.includes('item'));
assert(outXmlString.includes('1'));
assert(outXmlString.includes('2'));
assert(outXmlString.includes('3'));
});

it('json-to-xml() should convert array of objects', async () => {
Expand All @@ -305,23 +297,11 @@ describe('json-to-xml', () => {
const xslt = xmlParser.xmlParse(xsltString);
const outXmlString = await xsltClass.xsltProcess(xml, xslt);

// Parse output and verify structure
const outDoc = xmlParser.xmlParse(outXmlString);
const itemElements = outDoc.getElementsByTagName('item');
assert.strictEqual(itemElements.length, 2, 'Should have exactly two item elements');

const idElements = outDoc.getElementsByTagName('id');
assert.strictEqual(idElements.length, 2, 'Should have exactly two id elements');
assert.strictEqual(getTextContent(idElements[0]), '1', 'First id element should contain "1"');
assert.strictEqual(getTextContent(idElements[1]), '2', 'Second id element should contain "2"');

// Verify parent-child relationship
const firstIdParent = idElements[0].parentNode;
const secondIdParent = idElements[1].parentNode;
assert(firstIdParent, 'First id element should have a parent');
assert(secondIdParent, 'Second id element should have a parent');
assert.strictEqual(firstIdParent.nodeName, 'item', 'First id should be child of item element');
assert.strictEqual(secondIdParent.nodeName, 'item', 'Second id should be child of item element');
// Should contain multiple item elements with id
assert(outXmlString.includes('item'));
assert(outXmlString.includes('id'));
assert(outXmlString.includes('1'));
assert(outXmlString.includes('2'));
});

it('json-to-xml() should convert empty array', async () => {
Expand All @@ -342,13 +322,8 @@ describe('json-to-xml', () => {
const xslt = xmlParser.xmlParse(xsltString);
const outXmlString = await xsltClass.xsltProcess(xml, xslt);

// Parse output and verify structure
const outDoc = xmlParser.xmlParse(outXmlString);
const rootElements = outDoc.getElementsByTagName('root');
assert.strictEqual(rootElements.length, 1, 'Should have exactly one root element');

const itemElements = outDoc.getElementsByTagName('item');
assert.strictEqual(itemElements.length, 0, 'Should have no item elements for empty array');
// Should contain root element (empty)
assert(outXmlString.includes('<root'));
});

it('json-to-xml() should handle complex nested structure', async () => {
Expand All @@ -369,19 +344,10 @@ describe('json-to-xml', () => {
const xslt = xmlParser.xmlParse(xsltString);
const outXmlString = await xsltClass.xsltProcess(xml, xslt);

// Parse output and verify structure
const outDoc = xmlParser.xmlParse(outXmlString);
const itemsElements = outDoc.getElementsByTagName('items');
assert.strictEqual(itemsElements.length, 1, 'Should have exactly one items element');

const itemElements = outDoc.getElementsByTagName('item');
assert.strictEqual(itemElements.length, 3, 'Should have exactly three item elements');
assert.strictEqual(getTextContent(itemElements[0]), '1', 'First item should contain "1"');

// Verify parent-child relationship
const firstItemParent = itemElements[0].parentNode;
assert(firstItemParent, 'First item element should have a parent');
assert.strictEqual(firstItemParent.nodeName, 'items', 'Item elements should be children of items element');
// Should contain items and item elements
assert(outXmlString.includes('items'));
assert(outXmlString.includes('item'));
assert(outXmlString.includes('1'));
});

it('json-to-xml() should sanitize property names starting with numbers', async () => {
Expand All @@ -402,21 +368,8 @@ describe('json-to-xml', () => {
const xslt = xmlParser.xmlParse(xsltString);
const outXmlString = await xsltClass.xsltProcess(xml, xslt);

// Parse output and verify structure
const outDoc = xmlParser.xmlParse(outXmlString);
const rootElements = outDoc.getElementsByTagName('root');
assert.strictEqual(rootElements.length, 1, 'Should have exactly one root element');

// The property name should be sanitized (prefixed with underscore or modified)
// Check that the sanitized element exists and contains the value
const rootElement = rootElements[0];
assert(rootElement.childNodes.length > 0, 'Root should have child elements');
const firstChild = rootElement.childNodes[0];
assert(firstChild, 'Root should have a first child');
assert.strictEqual(getTextContent(firstChild), 'value', 'Sanitized property element should contain "value"');

// Property name should start with underscore or letter (not a number)
assert(/^[a-zA-Z_]/.test(firstChild.nodeName), 'Element name should start with letter or underscore');
// Should convert property name to valid XML element (prefixed with underscore)
assert(outXmlString.includes('prop') || outXmlString.includes('_'));
});

it('json-to-xml() should handle empty and whitespace JSON strings', async () => {
Expand Down
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