test: fix ngcc unit tests in windows (#30297)

```
//packages/compiler-cli/ngcc/test:test
```

Partially addresses #29785

PR Close #30297

packages/compiler-cli/ngcc/src/rendering/renderer.ts

@@ -173,7 +173,7 @@ export abstract class Renderer {
   renderDtsFile(dtsFile: ts.SourceFile, renderInfo: DtsRenderInfo): FileInfo[] {
     const input = this.extractSourceMap(dtsFile);
     const outputText = new MagicString(input.source);
-    const printer = ts.createPrinter();
+    const printer = createPrinter();
     const importManager = new ImportManager(
         this.getImportRewriter(this.bundle.dts !.r3SymbolsFile, false), IMPORT_PREFIX);
 
@@ -476,7 +476,7 @@ export function mergeSourceMaps(
  */
 export function renderConstantPool(
     sourceFile: ts.SourceFile, constantPool: ConstantPool, imports: ImportManager): string {
-  const printer = ts.createPrinter();
+  const printer = createPrinter();
   return constantPool.statements
       .map(stmt => translateStatement(stmt, imports, NOOP_DEFAULT_IMPORT_RECORDER))
       .map(stmt => printer.printNode(ts.EmitHint.Unspecified, stmt, sourceFile))
@@ -493,7 +493,7 @@ export function renderConstantPool(
  */
 export function renderDefinitions(
     sourceFile: ts.SourceFile, compiledClass: CompiledClass, imports: ImportManager): string {
-  const printer = ts.createPrinter();
+  const printer = createPrinter();
   const name = compiledClass.declaration.name;
   const translate = (stmt: Statement) =>
       translateStatement(stmt, imports, NOOP_DEFAULT_IMPORT_RECORDER);
@@ -529,3 +529,7 @@ function getImportString(
   const importAs = importPath ? importManager.generateNamedImport(importPath, importName) : null;
   return importAs ? `${importAs.moduleImport}.${importAs.symbol}` : `${importName}`;
 }
+
+function createPrinter(): ts.Printer {
+  return ts.createPrinter({newLine: ts.NewLineKind.LineFeed});
+}

packages/compiler-cli/ngcc/test/dependencies/esm_dependency_host_spec.ts

@@ -70,7 +70,7 @@ describe('DependencyHost', () => {
       expect(dependencies.size).toBe(0);
       expect(missing.size).toBe(0);
       expect(deepImports.size).toBe(1);
-      expect(deepImports.has('/node_modules/lib-1/deep/import')).toBe(true);
+      expect(deepImports.has(_('/node_modules/lib-1/deep/import'))).toBe(true);
     });
 
     it('should recurse into internal dependencies', () => {

packages/compiler-cli/ngcc/test/packages/entry_point_spec.ts

@@ -12,7 +12,7 @@ import {getEntryPointInfo} from '../../src/packages/entry_point';
 import {MockFileSystem} from '../helpers/mock_file_system';
 import {MockLogger} from '../helpers/mock_logger';
 
-const _ = AbsoluteFsPath.fromUnchecked;
+const _ = AbsoluteFsPath.from;
 
 describe('getEntryPointInfo()', () => {
   const SOME_PACKAGE = _('/some_package');

packages/compiler-cli/ngcc/test/writing/in_place_file_writer_spec.ts

@@ -11,7 +11,7 @@ import {EntryPointBundle} from '../../src/packages/entry_point_bundle';
 import {InPlaceFileWriter} from '../../src/writing/in_place_file_writer';
 import {MockFileSystem} from '../helpers/mock_file_system';
 
-const _ = AbsoluteFsPath.fromUnchecked;
+const _ = AbsoluteFsPath.from;
 
 function createMockFileSystem() {
   return new MockFileSystem({
@@ -71,13 +71,14 @@ describe('InPlaceFileWriter', () => {
   it('should error if the backup file already exists', () => {
     const fs = createMockFileSystem();
     const fileWriter = new InPlaceFileWriter(fs);
+    const absoluteBackupPath = _('/package/path/already-backed-up.js');
     expect(
         () => fileWriter.writeBundle(
             {} as EntryPoint, {} as EntryPointBundle,
             [
-              {path: _('/package/path/already-backed-up.js'), contents: 'MODIFIED BACKED UP'},
+              {path: absoluteBackupPath, contents: 'MODIFIED BACKED UP'},
             ]))
         .toThrowError(
-            'Tried to overwrite /package/path/already-backed-up.js.__ivy_ngcc_bak with an ngcc back up file, which is disallowed.');
+            `Tried to overwrite ${absoluteBackupPath}.__ivy_ngcc_bak with an ngcc back up file, which is disallowed.`);
   });
 });