test: update material tests to use version 10

Author: alan-agius4

Diff for: tests/legacy-cli/e2e/tests/build/material.ts

@@ -1,12 +1,13 @@
 import { getGlobalVariable } from '../../utils/env';
 import { replaceInFile } from '../../utils/fs';
 import { ng, silentNpm } from '../../utils/process';
-import { updateJsonFile } from '../../utils/project';
+import { isPrereleaseCli, updateJsonFile } from '../../utils/project';
 
 const snapshots = require('../../ng-snapshot/package.json');
 
 export default async function () {
-  await ng('add', '@angular/material');
+  const tag = await isPrereleaseCli() ?  '@next' : '';
+  await ng('add', `@angular/material${tag}`);
 
   const isSnapshotBuild = getGlobalVariable('argv')['ng-snapshots'];
   if (isSnapshotBuild) {

Diff for: tests/legacy-cli/e2e/tests/commands/add/add-material.ts

@@ -1,20 +1,23 @@
 import { expectFileToMatch, rimraf } from '../../../utils/fs';
 import { ng } from '../../../utils/process';
+import { isPrereleaseCli } from '../../../utils/project';
 
 
 export default async function () {
   // forcibly remove in case another test doesn't clean itself up
   await rimraf('node_modules/@angular/material');
 
+  const tag = await isPrereleaseCli() ?  '@next' : '';
+
   try {
-    await ng('add', '@angular/material', '--unknown');
+    await ng('add', `@angular/material${tag}`, '--unknown');
   } catch (error) {
     if (!(error.message && error.message.includes(`Unknown option: '--unknown'`))) {
       throw error;
     }
   }
 
-  await ng('add', '@angular/material', '--theme', 'custom', '--verbose');
+  await ng('add',  `@angular/material${tag}`, '--theme', 'custom', '--verbose');
   await expectFileToMatch('package.json', /@angular\/material/);
 
   const output1 = await ng('add', '@angular/material');