fix(compiler): make tsx file aot compatible

fixes #20555

packages/compiler-cli/test/transformers/compiler_host_spec.ts

@@ -285,6 +285,22 @@ describe('NgCompilerHost', () => {
       expect(sf.referencedFiles.length).toBe(1);
       expect(sf.referencedFiles[0].fileName).toBe('main.ts');
     });
+
+    it('should generate for tsx files', () => {
+      codeGenerator.findGeneratedFileNames.and.returnValue(['/tmp/src/index.ngfactory.ts']);
+      codeGenerator.generateFile.and.returnValue(aGeneratedFile);
+      const host = createHost({files: {'tmp': {'src': {'index.tsx': ``}}}});
+
+      const genSf = host.getSourceFile('/tmp/src/index.ngfactory.ts', ts.ScriptTarget.Latest);
+      expect(genSf.text).toBe(aGeneratedFileText);
+
+      const sf = host.getSourceFile('/tmp/src/index.tsx', ts.ScriptTarget.Latest);
+      expect(sf.referencedFiles[0].fileName).toBe('/tmp/src/index.ngfactory.ts');
+
+      // the codegen should have been cached
+      expect(codeGenerator.generateFile).toHaveBeenCalledTimes(1);
+      expect(codeGenerator.findGeneratedFileNames).toHaveBeenCalledTimes(1);
+    });
   });
 
   describe('updateSourceFile', () => {

packages/compiler-cli/test/transformers/program_spec.ts

@@ -391,6 +391,22 @@ describe('ng program', () => {
     testSupport.shouldExist('built/src/main.ngfactory.d.ts');
   });
 
+  it('should work with tsx files', () => {
+    // create a temporary ts program to get the list of all files from angular...
+    testSupport.writeFiles({
+      'src/main.tsx': createModuleAndCompSource('main'),
+    });
+    const allRootNames = resolveFiles([path.resolve(testSupport.basePath, 'src/main.tsx')]);
+
+    const program = compile(undefined, {jsx: ts.JsxEmit.React}, allRootNames);
+
+    testSupport.shouldExist('built/src/main.js');
+    testSupport.shouldExist('built/src/main.d.ts');
+    testSupport.shouldExist('built/src/main.ngfactory.js');
+    testSupport.shouldExist('built/src/main.ngfactory.d.ts');
+    testSupport.shouldExist('built/src/main.ngsummary.json');
+  });
+
   it('should emit also empty generated files depending on the options', () => {
     testSupport.writeFiles({
       'src/main.ts': `