build(docs-infra): fix StackBlitz projects and ZIPs for `testing` guide examples (#31937)

- Update the `stackblitz.json` config files (used for generating
  Stackblitz projects and ZIP archives) to include the correct files
  (taking into account the current layout of the example projects).
- Update the boilerplate files for `testing` examples to match the
  current layout of the example projects.

PR Close #31937

aio/content/examples/testing/specs.stackblitz.json

@@ -1,24 +1,22 @@
 {
   "description": "Testing - specs",
   "files":[
+    "src/expected.ts",
+    "src/index-specs.html",
+    "src/main-specs.ts",
     "src/styles.css",
+    "src/test.css",
+    "src/tests.sb.ts",
+
+    "e2e/src/**/*.ts",
 
     "src/app/**/*.css",
     "src/app/**/*.html",
     "src/app/**/*.ts",
-    "src/app/**/*.spec.ts",
 
-    "src/testing/*.ts",
+    "src/testing/**/*",
 
-    "!src/main.ts",
-    "!src/app/bag/*.*",
-    "!src/app/1st.spec.ts",
-
-    "src/expected.ts",
-    "src/test.css",
-    "src/tests.sb.ts",
-    "src/main-specs.ts",
-    "src/index-specs.html"
+    "src/**/*.spec.ts"
   ],
   "main": "src/index-specs.html",
   "tags": ["testing"]

aio/content/examples/testing/src/testing/global-jasmine.ts

@@ -1,3 +1,3 @@
-const jasmineRequire = require('jasmine-core/lib/jasmine-core/jasmine.js');
+import jasmineRequire from 'jasmine-core/lib/jasmine-core/jasmine.js';
 
 window['jasmineRequire'] = jasmineRequire;

aio/content/examples/testing/stackblitz.json

@@ -1,19 +1,18 @@
 {
   "description": "Heroes Test App",
   "files":[
+    "src/index.html",
+    "src/main.ts",
     "src/styles.css",
+    "src/test.css",
+
+    "e2e/src/**/*.ts",
 
     "src/app/**/*.css",
     "src/app/**/*.html",
     "src/app/**/*.ts",
 
-    "!src/app/bag/*.*",
-
-    "!src/test.ts",
-
-    "src/test.css",
-    "src/main.ts",
-    "src/index.html"
+    "!src/**/*.spec.ts"
   ],
   "tags": ["testing"]
 }

aio/tools/examples/shared/boilerplate/testing/tsconfig.app.json

@@ -1,5 +1,5 @@
 {
-  "extends": "../tsconfig.json",
+  "extends": "./tsconfig.json",
   "compilerOptions": {
     "outDir": "../out-tsc/app",
     "types": []

aio/tools/examples/shared/boilerplate/testing/tsconfig.spec.json

@@ -1,5 +1,5 @@
 {
-  "extends": "../tsconfig.json",
+  "extends": "./tsconfig.json",
   "compilerOptions": {
     "outDir": "../out-tsc/spec",
     "types": [
@@ -8,8 +8,8 @@
     ]
   },
   "files": [
-    "test.ts",
-    "polyfills.ts"
+    "src/test.ts",
+    "src/polyfills.ts"
   ],
   "include": [
     "src/**/*.spec.ts",