test: remove id in snapshots

__tests__/integration/snapshot.spec.ts

@@ -1,5 +1,5 @@
 import * as fs from 'fs';
-import { Canvas } from '@antv/g';
+import { Canvas, resetEntityCounter } from '@antv/g';
 import { format } from 'prettier';
 import xmlserializer from 'xmlserializer';
 import * as tests from './components';
@@ -9,6 +9,29 @@ import { fetch } from './fetch';
 // @ts-ignore
 global.fetch = fetch;
 
+const removeId = (svg: string, reserved?: Map<string, number>) => {
+  if (!reserved) return svg.replace(/ *id="[^"]*" */g, ' ');
+  return svg.replace(/ *id="([^"]*)" *| *href="#([^"]*)" *|url\(#([^"]*)\)/g, (match, id, href, url) => {
+    const value = id || href || url;
+    const index = reserved.get(value);
+    if (index !== undefined) return match.replace(value, `ref-${index}`);
+    return ' ';
+  });
+};
+
+const formatSVG = (svg: string) => {
+  if (!svg.includes('<defs>')) return svg; // svg defs, it's a little complex to handle
+
+  let counter = 0;
+  const refs = new Map<string, number>();
+
+  svg.match(/href="#[^"]*"/g)?.forEach((ref) => refs.set(ref.slice(7, -1), counter++));
+
+  const [before, after] = svg.split('</defs>');
+
+  return `${before}</defs>${removeId(after, refs)}`.replace(/\r\n|\n\s+\n/g, '\n');
+};
+
 describe('integration', () => {
   const onlyTests = Object.entries(tests).filter(
     // @ts-ignore
@@ -17,6 +40,14 @@ describe('integration', () => {
 
   const finalTests = onlyTests.length === 0 ? tests : Object.fromEntries(onlyTests);
 
+  if (!fs.existsSync(`${__dirname}/snapshots`)) {
+    fs.mkdirSync(`${__dirname}/snapshots`);
+  }
+
+  beforeEach(() => {
+    resetEntityCounter();
+  });
+
   for (const [name, target] of Object.entries(finalTests)) {
     // @ts-ignore
     if (!target.skip) {
@@ -33,7 +64,7 @@ describe('integration', () => {
           const container = canvas.getConfig().container as HTMLElement;
           const dom = container.querySelector('svg');
 
-          actual = await format(xmlserializer.serializeToString(dom as any), {
+          actual = await format(formatSVG(xmlserializer.serializeToString(dom as any)), {
             parser: 'babel',
           });