diff --git a/src/helpers/common.test.ts b/src/helpers/common.test.ts
new file mode 100644
index 00000000..76b7e01c
--- /dev/null
+++ b/src/helpers/common.test.ts
@@ -0,0 +1,68 @@
+import { expect, test } from 'vitest';
+import {
+  camelToFlat, findSuitableName, getNumberOfDecimals, getUniqueValues,
+  isFiniteNumber, isNonNull,
+} from './common';
+
+test('isFiniteNumber', () => {
+  expect(isFiniteNumber(1)).toBe(true);
+  expect(isFiniteNumber(1.12)).toBe(true);
+  expect(isFiniteNumber('1')).toBe(true);
+  expect(isFiniteNumber('1.12')).toBe(true);
+  expect(isFiniteNumber('')).toBe(false);
+  expect(isFiniteNumber(null)).toBe(false);
+  expect(isFiniteNumber(undefined)).toBe(false);
+  expect(isFiniteNumber(true)).toBe(false);
+  expect(isFiniteNumber(false)).toBe(false);
+  expect(isFiniteNumber(NaN)).toBe(false);
+  expect(isFiniteNumber(Infinity)).toBe(false);
+  expect(isFiniteNumber(-Infinity)).toBe(false);
+  expect(isFiniteNumber('a')).toBe(false);
+  // expect(isFiniteNumber([])).toBe(false);
+  // expect(isFiniteNumber({})).toBe(false);
+});
+
+test('isNonNull', () => {
+  expect(isNonNull(1)).toBe(true);
+  expect(isNonNull(1.12)).toBe(true);
+  expect(isNonNull('1')).toBe(true);
+  expect(isNonNull('1.12')).toBe(true);
+  expect(isNonNull('')).toBe(false);
+  expect(isNonNull(null)).toBe(false);
+  expect(isNonNull(undefined)).toBe(false);
+  expect(isNonNull(true)).toBe(true);
+  expect(isNonNull(false)).toBe(true);
+  expect(isNonNull(NaN)).toBe(true);
+  expect(isNonNull(Infinity)).toBe(true);
+  expect(isNonNull(-Infinity)).toBe(true);
+});
+
+test('getNumberOfDecimals', () => {
+  expect(getNumberOfDecimals(1)).toBe(0);
+  expect(getNumberOfDecimals(1.12)).toBe(2);
+  expect(getNumberOfDecimals(1.123456)).toBe(6);
+  expect(getNumberOfDecimals(0.000789)).toBe(6);
+});
+
+test('camelToFlat', () => {
+  expect(camelToFlat('camelCase')).toBe('Camel Case');
+  expect(camelToFlat('camelCaseTest')).toBe('Camel Case Test');
+  expect(camelToFlat('CamelCasE')).toBe('Camel Cas E');
+  expect(camelToFlat('NaturalEarth2')).toBe('Natural Earth 2');
+  expect(camelToFlat('Kavrayskiy7')).toBe('Kavrayskiy 7');
+});
+
+test('getUniqueValues', () => {
+  expect(getUniqueValues([1, 2, 3, 4, 5, 6, 7, 8, 9, 10])).toEqual([1, 2, 3, 4, 5, 6, 7, 8, 9, 10]);
+  expect(getUniqueValues(
+    [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10],
+  )).toEqual([1, 2, 3, 4, 5, 6, 7, 8, 9, 10]);
+});
+
+test('findSuitableName', () => {
+  expect(findSuitableName('name', ['name', 'other name'])).toBe('name (1)');
+  expect(findSuitableName('name', ['name', 'other name', 'name (1)'])).toBe('name (2)');
+  expect(findSuitableName('name', ['name', 'other name', 'name (1)', 'name (2)'])).toBe('name (3)');
+  expect(findSuitableName('name', ['name', 'other name', 'name (1)', 'name (3)'])).toBe('name (2)');
+  expect(findSuitableName('name', ['name (1)', 'name (2)', 'name (3)'])).toBe('name (4)');
+});
diff --git a/vite.config.ts b/vite.config.ts
index 6f7286e6..67fd6f4a 100644
--- a/vite.config.ts
+++ b/vite.config.ts
@@ -80,9 +80,9 @@ export default defineConfig({
     environment: 'jsdom',
     globals: true,
     transformMode: { web: [/\.[jt]sx?$/] },
-    setupFiles: ['node_modules/@testing-library/jest-dom/extend-expect.js'],
+    setupFiles: ['@testing-library/jest-dom'],
     // otherwise, solid would be loaded twice:
-    // deps: { registerNodeLoader: true },
+    deps: { registerNodeLoader: true },
     // if you have few tests, try commenting one
     // or both out to improve performance:
     threads: false,