diff --git a/tests/constants.test.ts b/tests/constants.test.ts
new file mode 100644
index 0000000..fcaefed
--- /dev/null
+++ b/tests/constants.test.ts
@@ -0,0 +1,50 @@
+import { describe, expect, it } from 'bun:test';
+
+const loadConstantsWithArgv = async (argv1: string) => {
+  const originalArgv = process.argv;
+  process.argv = ['node', argv1];
+  const url = `../src/utils/constants.ts?t=${Date.now()}_${Math.random()}`;
+  const mod = await import(url);
+  process.argv = originalArgv;
+  return mod;
+};
+
+describe('constants', () => {
+  it('should initialize correctly when script is cresc', async () => {
+    const mod = await loadConstantsWithArgv('/usr/local/bin/cresc');
+    expect(mod.scriptName).toBe('cresc');
+    expect(mod.IS_CRESC).toBe(true);
+    expect(mod.credentialFile).toBe('.cresc.token');
+    expect(mod.updateJson).toBe('cresc.config.json');
+    expect(mod.tempDir).toBe('.cresc.temp');
+    expect(mod.pricingPageUrl).toBe('https://cresc.dev/pricing');
+    expect(mod.defaultEndpoints).toEqual([
+      'https://api.cresc.dev',
+      'https://api.cresc.app',
+    ]);
+  });
+
+  it('should initialize correctly when script is pushy', async () => {
+    const mod = await loadConstantsWithArgv('/usr/local/bin/pushy');
+    expect(mod.scriptName).toBe('pushy');
+    expect(mod.IS_CRESC).toBe(false);
+    expect(mod.credentialFile).toBe('.update');
+    expect(mod.updateJson).toBe('update.json');
+    expect(mod.tempDir).toBe('.pushy');
+    expect(mod.pricingPageUrl).toBe(
+      'https://pushy.reactnative.cn/pricing.html',
+    );
+    expect(mod.defaultEndpoints).toEqual([
+      'https://update.reactnative.cn/api',
+      'https://update.react-native.cn/api',
+    ]);
+  });
+
+  it('should identify PPK bundle file names correctly', async () => {
+    const { isPPKBundleFileName } = await import('../src/utils/constants.ts');
+    expect(isPPKBundleFileName('index.bundlejs')).toBe(true);
+    expect(isPPKBundleFileName('bundle.harmony.js')).toBe(true);
+    expect(isPPKBundleFileName('index.js')).toBe(false);
+    expect(isPPKBundleFileName('main.bundlejs')).toBe(false);
+  });
+});