Add readFile

docs/api/inline-fixture-files.createiffresult.md

@@ -26,6 +26,7 @@ export interface CreateIFFResult<T extends Directory>
 |  [addFixtures(additionalDirectory)](./inline-fixture-files.createiffresult.addfixtures.md) | Add fixtures to the fixture root directory. |
 |  [fork(additionalDirectory, forkOptions)](./inline-fixture-files.createiffresult.fork.md) | Change the root directory and take over the fixture you created. |
 |  [join(paths)](./inline-fixture-files.createiffresult.join.md) | Join <code>rootDir</code> and <code>paths</code>. It is equivalent to <code>require('path').join(rootDir, ...paths)</code>. |
+|  [readFile(path)](./inline-fixture-files.createiffresult.readfile.md) | Read the file. |
 |  [reset()](./inline-fixture-files.createiffresult.reset.md) | Delete the fixture root directory and write the fixtures specified in <code>directory</code> argument again. |
 |  [rmFixtures()](./inline-fixture-files.createiffresult.rmfixtures.md) | Delete files under the fixture root directory. |
 |  [rmRootDir()](./inline-fixture-files.createiffresult.rmrootdir.md) | Delete the fixture root directory. |

docs/api/inline-fixture-files.createiffresult.readfile.md

@@ -0,0 +1,26 @@
+<!-- Do not edit this file. It is automatically generated by API Documenter. -->
+
+[Home](./index.md) &gt; [@mizdra/inline-fixture-files](./inline-fixture-files.md) &gt; [CreateIFFResult](./inline-fixture-files.createiffresult.md) &gt; [readFile](./inline-fixture-files.createiffresult.readfile.md)
+
+## CreateIFFResult.readFile() method
+
+Read the file.
+
+**Signature:**
+
+```typescript
+readFile(path: string): Promise<string>;
+```
+
+## Parameters
+
+|  Parameter | Type | Description |
+|  --- | --- | --- |
+|  path | string | The path to the file. |
+
+**Returns:**
+
+Promise&lt;string&gt;
+
+The content of the file.
+

src/index.test.ts

@@ -240,6 +240,10 @@ describe('CreateIFFResult', () => {
       expect(iff.join('a.txt')).toBe(slash(join(fixtureDir, 'a.txt')));
     });
   });
+  test('readFile', async () => {
+    const iff = await createIFF({ 'a.txt': 'a' });
+    expect(await iff.readFile('a.txt')).toMatchInlineSnapshot('"a"');
+  });
   test('rmFixtures', async () => {
     const iff = await createIFF({
       'a.txt': 'a',

src/index.ts

@@ -3,7 +3,7 @@
  * The utility for writing fixture files inline.
  */
 
-import { constants, cp, readdir, rm } from 'node:fs/promises';
+import { constants, cp, readdir, readFile, rm } from 'node:fs/promises';
 import { join } from 'node:path';
 import type { Directory, MergeDirectory } from './create-iff-impl.js';
 import { createIFFImpl } from './create-iff-impl.js';
@@ -135,6 +135,12 @@ export interface CreateIFFResult<T extends Directory> {
    * ```
    */
   join(...paths: string[]): string;
+  /**
+   * Read the file.
+   * @param path - The path to the file.
+   * @returns The content of the file.
+   */
+  readFile(path: string): Promise<string>;
   /**
    * Delete the fixture root directory.
    */
@@ -263,6 +269,9 @@ export function defineIFFCreator(defineIFFCreatorOptions: DefineIFFCreatorOption
       join(...paths) {
         return unixStylePath ? slash(join(rootDir, ...paths)) : join(rootDir, ...paths);
       },
+      readFile: async (path) => {
+        return await readFile(join(rootDir, path), 'utf-8');
+      },
       async rmRootDir() {
         await rm(rootDir, { recursive: true, force: true });
       },