Added logic to facilitate the Cache even it's in out side of root folder also

__tests__/setup-python.test.ts

@@ -0,0 +1,92 @@
+import * as core from '@actions/core';
+import * as fs from 'fs';
+import * as path from 'path';
+import {cacheDependencies} from '../src/setup-python';
+import {getCacheDistributor} from '../src/cache-distributions/cache-factory';
+
+jest.mock('fs', () => {
+  const actualFs = jest.requireActual('fs');
+  return {
+    ...actualFs,
+    copyFileSync: jest.fn(),
+    existsSync: jest.fn(),
+    promises: {
+      access: jest.fn(),
+      writeFile: jest.fn(),
+      appendFile: jest.fn()
+    }
+  };
+});
+jest.mock('@actions/core');
+jest.mock('../src/cache-distributions/cache-factory');
+
+const mockedFs = fs as jest.Mocked<typeof fs>;
+const mockedCore = core as jest.Mocked<typeof core>;
+const mockedGetCacheDistributor = getCacheDistributor as jest.Mock;
+
+describe('cacheDependencies', () => {
+  const mockRestoreCache = jest.fn();
+
+  beforeEach(() => {
+    jest.clearAllMocks();
+    process.env.GITHUB_ACTION_PATH = '/github/action';
+    process.env.GITHUB_WORKSPACE = '/github/workspace';
+
+    mockedCore.getInput.mockReturnValue('deps.lock');
+    mockedFs.existsSync.mockReturnValue(true);
+    mockedFs.copyFileSync.mockImplementation(() => {});
+    mockedGetCacheDistributor.mockReturnValue({restoreCache: mockRestoreCache});
+  });
+
+  it('copies the dependency file and resolves the path', async () => {
+    await cacheDependencies('pip', '3.12');
+
+    const sourcePath = path.resolve('/github/action', 'deps.lock');
+    const targetPath = path.resolve('/github/workspace', 'deps.lock');
+
+    expect(mockedFs.existsSync).toHaveBeenCalledWith(sourcePath);
+    expect(mockedFs.copyFileSync).toHaveBeenCalledWith(sourcePath, targetPath);
+    expect(mockedCore.info).toHaveBeenCalledWith(
+      `Copied ${sourcePath} to ${targetPath}`
+    );
+    expect(mockedCore.info).toHaveBeenCalledWith(
+      `Resolved cache-dependency-path: deps.lock`
+    );
+    expect(mockRestoreCache).toHaveBeenCalled();
+  });
+
+  it('warns if the dependency file does not exist', async () => {
+    mockedFs.existsSync.mockReturnValue(false);
+
+    await cacheDependencies('pip', '3.12');
+
+    expect(mockedCore.warning).toHaveBeenCalledWith(
+      expect.stringContaining('does not exist')
+    );
+    expect(mockedFs.copyFileSync).not.toHaveBeenCalled();
+    expect(mockRestoreCache).toHaveBeenCalled();
+  });
+
+  it('warns if file copy fails', async () => {
+    mockedFs.copyFileSync.mockImplementation(() => {
+      throw new Error('copy failed');
+    });
+
+    await cacheDependencies('pip', '3.12');
+
+    expect(mockedCore.warning).toHaveBeenCalledWith(
+      expect.stringContaining('Failed to copy file')
+    );
+    expect(mockRestoreCache).toHaveBeenCalled();
+  });
+
+  it('skips path logic if no input is provided', async () => {
+    mockedCore.getInput.mockReturnValue('');
+
+    await cacheDependencies('pip', '3.12');
+
+    expect(mockedFs.copyFileSync).not.toHaveBeenCalled();
+    expect(mockedCore.warning).not.toHaveBeenCalled();
+    expect(mockRestoreCache).toHaveBeenCalled();
+  });
+});