feat: cp method (#7)

Co-authored-by: Hiroki Osame <hiroki.osame@gmail.com>

README.md

@@ -165,6 +165,11 @@ class FsFixture {
     */
     rm(subpath?: string): Promise<void>
 
+    /**
+    Copy a path into the fixture directory.
+    */
+    cp(sourcePath: string, destinationSubpath?: string): Promise<void>
+
     /**
     Create a file in the fixture directory.
     */

src/fs-fixture.ts

@@ -1,4 +1,5 @@
 import fs from 'node:fs/promises';
+import type { CopyOptions } from 'node:fs';
 import path from 'node:path';
 
 if (typeof Symbol.asyncDispose !== 'symbol') {
@@ -50,6 +51,21 @@ export class FsFixture {
 		});
 	}
 
+	/**
+	Copy a path into the fixture directory.
+	*/
+	cp(
+		sourcePath: string,
+		destinationSubpath: string,
+		options?: CopyOptions,
+	) {
+		return fs.cp(
+			sourcePath,
+			this.getPath(destinationSubpath),
+			options,
+		);
+	}
+
 	/**
 	Create a file in the fixture directory.
 	*/

tests/index.ts

@@ -59,8 +59,8 @@ describe('fs-fixture', ({ test }) => {
 
 		expect<FsFixture>(fixture);
 
-		const filePathA = path.join(fixture.path, 'directory/a');
-		const filePathB = path.join(fixture.path, 'directory/b');
+		const filePathA = fixture.getPath('directory/a');
+		const filePathB = fixture.getPath('directory/b');
 
 		// exists
 		expect(await fixture.exists('directory/a')).toBe(true);
@@ -77,6 +77,9 @@ describe('fs-fixture', ({ test }) => {
 		}));
 		expect(await fixture.readFile('directory/d', 'utf8')).toBe('a');
 
+		await fixture.cp(filePathA, 'directory/a-copy');
+		expect(await fixture.readFile('directory/a-copy', 'utf8')).toBe('a');
+
 		// rm file
 		await fixture.rm('directory/a');
 
@@ -95,8 +98,8 @@ describe('fs-fixture', ({ test }) => {
 
 		expect<FsFixture>(fixture);
 
-		const filePathA = path.join(fixture.path, 'a');
-		const filePathB = path.join(fixture.path, 'directory/b');
+		const filePathA = fixture.getPath('a');
+		const filePathB = fixture.getPath('directory/b');
 
 		// exists
 		expect(await fixture.exists('a')).toBe(true);