file_walker.js detect articles in data file tree

test/file_walker.test.js

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+/* jshint -W117 */
+const fs = require('fs');
+
+const dataDir = './test_data';
+const testIndex = 'testindex.md';
+
+const config = {
+    'test': true,
+    'data_dir': dataDir,
+    'article': {
+        'index': testIndex
+    }
+};
+
+const fw = require('../src/file_walker')(config);
+
+const deleteFolderSync = (path) => {
+    if(!fs.existsSync(path))
+        return;
+    fs.readdirSync(path, {withFileTypes: true}).forEach((item) => {
+        if (item.isDirectory())
+            deleteFolderSync(`${path}/${item.name}`);
+        else
+            fs.unlinkSync(`${path}/${item.name}`);
+    });
+    fs.rmdirSync(path);
+};
+
+beforeEach(() => {
+    deleteFolderSync(dataDir);
+    fs.mkdirSync(dataDir);
+});
+
+afterAll(() => {
+    if (fs.existsSync(dataDir)) {
+        deleteFolderSync(dataDir);
+    }
+});
+
+const createEmptyDirs = list => list.forEach(path => fs.mkdirSync(path, {recursive: true}));
+const createEmptyFiles = list => list.forEach(file => fs.writeFileSync(file, ''));
+
+describe('Test function fileTree', () => {
+    test('empty root', (done) => {
+        fw.fileTree(dataDir, (err, list) => {
+            expect(err).toBeNull();
+            expect(list).toBeDefined();
+            expect(list.length).toBe(0);
+            done();
+        });
+    });
+    test('empty folders', (done) => {
+        createEmptyDirs([
+            `${dataDir}/test/test`,
+            `${dataDir}/test/test2`,
+            `${dataDir}/test2`
+        ]);
+        fw.fileTree(dataDir, (err, list) => {
+            expect(err).toBeNull();
+            expect(list).toBeDefined();
+            expect(list.length).toBe(0);
+            done();
+        });
+    });
+    test('simple files', (done) => {
+        const fileList = [
+            `${dataDir}/f1.txt`,
+            `${dataDir}/f2.txt`
+        ];
+        createEmptyFiles(fileList);
+        fw.fileTree(dataDir, (err, list) => {
+            expect(err).toBeNull();
+            expect(list).toBeDefined();
+            expect(list.length).toBe(fileList.length);
+            expect(list).toEqual(expect.arrayContaining(fileList));
+            done();
+        });
+    });
+    test('nested files', (done) => {
+        createEmptyDirs([
+            `${dataDir}/test/test`,
+            `${dataDir}/test2`
+        ]);
+        const fileList = [
+            `${dataDir}/f1.txt`,
+            `${dataDir}/test/f2.txt`,
+            `${dataDir}/test/test/f3.txt`,
+            `${dataDir}/test2/f4.txt`
+        ];
+        createEmptyFiles(fileList);
+        fw.fileTree(dataDir, (err, list) => {
+            expect(err).toBeNull();
+            expect(list).toBeDefined();
+            expect(list.length).toBe(fileList.length);
+            expect(list).toEqual(expect.arrayContaining(fileList));
+            done();
+        });
+    });
+    test('invalid root', (done) => {
+        fw.fileTree('invalid root', (err, list) => {
+            expect(err).not.toBeNull();
+            expect(list).not.toBeDefined();
+            done();
+        });
+    });
+});
+
+describe('Test article fetching', () => {
+    test('invalid data dir', (done) => {
+        config['data_dir'] = 'invalid root';
+        fw.fetchArticles((err,list) => {
+            expect(err).not.toBeNull();
+            expect(list).not.toBeDefined();
+            config['data_dir'] = dataDir;
+            done();
+        });
+    });
+    test('empty data dir', (done) => {
+        fw.fetchArticles((err,list) => {
+            expect(err).toBeNull();
+            expect(list).toBeDefined();
+            expect(list.length).toBe(0);
+            done();
+        });
+    });
+    test('misplaced index file', (done) => {
+        createEmptyDirs([
+            `${dataDir}/test/test`,
+            `${dataDir}/2019/05/05`,
+        ]);
+        createEmptyFiles([
+            `${dataDir}/${testIndex}`,
+            `${dataDir}/test/test/${testIndex}`,
+            `${dataDir}/2019/05/${testIndex}`,
+        ]);
+        fw.fetchArticles((err,list) => {
+            expect(err).toBeNull();
+            expect(list).toBeDefined();
+            expect(list.length).toBe(0);
+            done();
+        });
+    });
+    test('correct index file', (done) => {
+        createEmptyDirs([
+            `${dataDir}/2019/05/05`,
+        ]);
+        const fileList = [
+            `${dataDir}/2019/05/05/${testIndex}`,
+        ];
+        createEmptyFiles(fileList);
+        fw.fetchArticles((err,list) => {
+            expect(err).toBeNull();
+            expect(list).toBeDefined();
+            expect(list.length).toBe(1);
+            expect(list[0]).toEqual({
+               path: fileList[0],
+                year:2019,
+                month:5,
+                day:5
+            });
+            done();
+        });
+    });
+});
+