375, race condition error, while counting files

package.json

@@ -31,9 +31,10 @@
   ],
   "dependencies": {
     "colors": "1.4.0",
-    "eo2js": "0.0.7",
     "commander": "12.1.0",
+    "eo2js": "0.0.7",
     "fast-xml-parser": "4.5.0",
+    "mock-fs": "^5.4.1",
     "node": "23.2.0",
     "relative": "3.0.2",
     "semver": "7.6.3",

src/mvnw.js

@@ -153,17 +153,13 @@ function stop() {
 }
 
 /**
- * Prints mvnw execution status.
+ * Recursively calculates number of files under a directory.
+ * @param {String} dir - Directory where to count.
+ * @param {Integer} curr - Current counter.
+ * @return {Integer} Total number files.
  */
-function print() {
-  const duration = Date.now() - beginning;
-  /**
-   * Recursively calculates number of files under a directory.
-   * @param {String} dir - Directory where to count.
-   * @param {Integer} curr - Current counter.
-   * @return {Integer} Total number files.
-   */
-  function count(dir, curr) {
+module.exports.count = function count(dir, curr) {
+  try {
     if (fs.existsSync(dir)) {
       for (const f of fs.readdirSync(dir)) {
         const next = path.join(dir, f);
@@ -174,8 +170,21 @@ function print() {
         }
       }
     }
-    return curr;
+  } catch (err) {
+    if (err.code === 'ENOENT') {
+      console.info(`Directory or file is not found: ${dir}`);
+    } else {
+      throw err;
+    }
   }
+  return curr;
+};
+
+/**
+ * Prints mvnw execution status.
+ */
+function print() {
+  const duration = Date.now() - beginning;
   let elapsed;
   if (duration < 1000) {
     elapsed = `${duration}ms`;
@@ -190,4 +199,3 @@ function print() {
   readline.clearLine(process.stdout, 1);
   readline.cursorTo(process.stdout, 0);
 }
-

test/test_count.js

@@ -0,0 +1,81 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2022-2024 Objectionary.com
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+const assert = require('assert');
+const mock = require('mock-fs');
+const {count} = require('../src/mvnw.js');
+const fs = require('fs');
+const path = require('path');
+
+describe('count', function() {
+  beforeEach(() => {
+    mock({
+      'mainDir': {
+        'testDir': {
+          'file1.txt': 'content1',
+          'folder1': {
+            'file2.txt': 'content2',
+            'folder2': {
+              'file3.txt': 'content3',
+              'folder3': {
+                'file4.txt': 'content4'
+              }
+            }
+          },
+          'folder4': {
+            'file5.txt': 'content5'
+          }
+        },
+        'flatDir': {
+          'file1.txt': 'content1',
+          'file2.txt': 'content2'
+        }
+      }
+    });
+  });
+
+  afterEach(() => {
+    mock.restore();
+  });
+
+  it('counts all files in a directory tree', () => {
+    const result = count('mainDir', 0);
+    assert.strictEqual(result, 7, `Expected to find 5 files, but found ${result}`);
+  });
+  it('returns 0 for an empty directory', () => {
+    mock({'emptyDir': {}}); // Пустая директория
+    const result = count('emptyDir', 0);
+    assert.strictEqual(result, 0, `Expected to find 0 files, but found ${result}`);
+  });
+  it('handles files being deleted during count', async () => {
+    await fs.promises.unlink(path.join('mainDir', 'testDir', 'folder1', 'file2.txt'));
+    await fs.promises.unlink(path.join('mainDir', 'flatDir', 'file1.txt'));
+
+    const result = count('mainDir', 0);
+    assert.ok(
+      result === 5,
+      `Expected to find 5 files (handling deletion), but found ${result}`
+    );
+  });
+});