Add tests for database uri fixing

extensions/ql-vscode/src/vscode-tests/no-workspace/databases-ui.test.ts

@@ -0,0 +1,47 @@
+import 'vscode-test';
+import 'mocha';
+import * as tmp from 'tmp';
+import * as path from 'path';
+import * as fs from 'fs-extra';
+import { expect } from 'chai';
+import { Uri } from 'vscode';
+
+import { DatabaseUI } from '../../databases-ui';
+
+describe('databases-ui', () => {
+  describe('fixDbUri', () => {
+    const fixDbUri = (DatabaseUI.prototype as any).fixDbUri;
+    it('should choose current directory direcory normally', async () => {
+      const dir = tmp.dirSync().name;
+      const uri = await fixDbUri(Uri.file(dir));
+      expect(uri.toString()).to.eq(Uri.file(dir).toString());
+    });
+
+    it('should choose parent direcory when file is selected', async () => {
+      const file = tmp.fileSync().name;
+      const uri = await fixDbUri(Uri.file(file));
+      expect(uri.toString()).to.eq(Uri.file(path.dirname(file)).toString());
+    });
+
+    it('should choose parent direcory when db-* is selected', async () => {
+      const dir = tmp.dirSync().name;
+      const dbDir = path.join(dir, 'db-hucairz');
+      await fs.mkdirs(dbDir);
+
+      const uri = await fixDbUri(Uri.file(dbDir));
+      expect(uri.toString()).to.eq(Uri.file(dir).toString());
+    });
+
+    it('should choose parent\'s parent direcory when file selected is in db-*', async () => {
+      const dir = tmp.dirSync().name;
+      const dbDir = path.join(dir, 'db-hucairz');
+      const file = path.join(dbDir, 'nested');
+      await fs.mkdirs(dbDir);
+      await fs.createFile(file);
+
+      const uri = await fixDbUri(Uri.file(file));
+      expect(uri.toString()).to.eq(Uri.file(dir).toString());
+    });
+  });
+
+});