From f052a4886522e34725b3d731159287b466765a89 Mon Sep 17 00:00:00 2001
From: Charles Lyding <19598772+clydin@users.noreply.github.com>
Date: Wed, 21 May 2025 14:41:51 -0400
Subject: [PATCH] fix(@angular/build): include full metadata for AOT
 unit-testing

Include class metadata and JIT information in code built for development and/or test usage.
All non-optimized builds will now contain this metadata (`optimization.scripts` is false).
The Angular TestBed APIs require additional metadata for the Angular aspects of the application
such as Components, Modules, Pipes, etc.
TestBed may also leverage JIT capabilities during testing (e.g., overrideComponent).
To support all these TestBed usage scenarios both the underlying `setClassMetadata`
and `setNgModuleScope` class augmentation functions are now emitted when
test metadata inclusion is enabled.
---
 .../build/src/tools/esbuild/angular/compiler-plugin.ts | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/packages/angular/build/src/tools/esbuild/angular/compiler-plugin.ts b/packages/angular/build/src/tools/esbuild/angular/compiler-plugin.ts
index 72131901ae94..f56e6c6c3119 100644
--- a/packages/angular/build/src/tools/esbuild/angular/compiler-plugin.ts
+++ b/packages/angular/build/src/tools/esbuild/angular/compiler-plugin.ts
@@ -35,6 +35,13 @@ export interface CompilerPluginOptions {
   sourcemap: boolean | 'external';
   tsconfig: string;
   jit?: boolean;
+
+  /**
+   * Include class metadata and JIT information in built code.
+   * The Angular TestBed APIs require additional metadata for the Angular aspects of the application
+   * such as Components, Modules, Pipes, etc.
+   * TestBed may also leverage JIT capabilities during testing (e.g., overrideComponent).
+   */
   includeTestMetadata?: boolean;
 
   advancedOptimizations?: boolean;
@@ -89,7 +96,7 @@ export function createCompilerPlugin(
           sourcemap: !!pluginOptions.sourcemap,
           thirdPartySourcemaps: pluginOptions.thirdPartySourcemaps,
           advancedOptimizations: pluginOptions.advancedOptimizations,
-          jit: pluginOptions.jit,
+          jit: pluginOptions.jit || pluginOptions.includeTestMetadata,
         },
         maxWorkers,
         cacheStore?.createCache('jstransformer'),
@@ -718,6 +725,7 @@ function createCompilerOptionsTransformer(
       externalRuntimeStyles: pluginOptions.externalRuntimeStyles,
       _enableHmr: !!pluginOptions.templateUpdates,
       supportTestBed: !!pluginOptions.includeTestMetadata,
+      supportJitMode: !!pluginOptions.includeTestMetadata,
     };
   };
 }