diff --git a/js/js-export/__tests__/interface.test.js b/js/js-export/__tests__/interface.test.js
new file mode 100644
index 0000000000..6f39eb26e3
--- /dev/null
+++ b/js/js-export/__tests__/interface.test.js
@@ -0,0 +1,103 @@
+const JSInterface = require('../interface');
+JSInterface._methodArgConstraints = {};
+
+describe('JSInterface', () => {
+  describe('isClampBlock', () => {
+    it('should return true for a known clamp block', () => {
+      expect(JSInterface.isClampBlock('newnote')).toBe(true);
+    });
+
+    it('should return false for an unknown block', () => {
+      expect(JSInterface.isClampBlock('nonexistent')).toBe(false);
+    });
+  });
+
+  describe('isSetter', () => {
+    it('should return true for a valid setter block', () => {
+      expect(JSInterface.isSetter('pickup')).toBe(true);
+    });
+
+    it('should return false for a block that is not a setter', () => {
+      expect(JSInterface.isSetter('newnote')).toBe(false);
+    });
+  });
+
+  describe('isGetter', () => {
+    it('should return true for a valid getter block', () => {
+      expect(JSInterface.isGetter('mynotevalue')).toBe(true);
+    });
+
+    it('should return false for a block that is not a getter', () => {
+      expect(JSInterface.isGetter('pickup')).toBe(false);
+    });
+  });
+
+  describe('isMethod', () => {
+    it('should return true for a valid method block', () => {
+      expect(JSInterface.isMethod('newnote')).toBe(true);
+    });
+
+    it('should return false for a block that is not a method', () => {
+      expect(JSInterface.isMethod('pickup')).toBe(false);
+    });
+  });
+
+  describe('methodReturns', () => {
+    it('should return true for a method that has a return value', () => {
+      expect(JSInterface.methodReturns('getDict')).toBe(true);
+    });
+
+    it('should return false for a method that does not have a return value', () => {
+      expect(JSInterface.methodReturns('newnote')).toBe(false);
+    });
+  });
+
+  describe('getSetterName', () => {
+    it('should return the correct setter name when available', () => {
+      expect(JSInterface.getSetterName('pickup')).toBe('PICKUP');
+    });
+
+    it('should return null when no setter exists for the given block', () => {
+      expect(JSInterface.getSetterName('newnote')).toBeNull();
+    });
+  });
+
+  describe('getGetterName', () => {
+    it('should return the correct getter name when available', () => {
+      expect(JSInterface.getGetterName('mynotevalue')).toBe('NOTEVALUE');
+    });
+
+    it('should return null when no getter exists for the given block', () => {
+      expect(JSInterface.getGetterName('pickup')).toBeNull();
+    });
+  });
+
+  describe('getMethodName', () => {
+    it('should return the correct method name when available', () => {
+      expect(JSInterface.getMethodName('newnote')).toBe('playNote');
+    });
+
+    it('should return null when no method exists for the given block', () => {
+      expect(JSInterface.getMethodName('pickup')).toBeNull();
+    });
+  });
+
+  describe('rearrangeMethodArgs', () => {
+    it('should rearrange the arguments for methods present in the lookup', () => {
+      const args = [1, 2, 3];
+      expect(JSInterface.rearrangeMethodArgs('setDict', args)).toEqual([2, 3, 1]);
+    });
+
+    it('should return the original args if no rearrangement is required', () => {
+      const args = [1, 2, 3];
+      expect(JSInterface.rearrangeMethodArgs('nonExistingMethod', args)).toEqual(args);
+    });
+  });
+
+  describe('validateArgs', () => {
+    it('should return the original args when no constraints are defined for the method', () => {
+      const args = [1, 2, 3];
+      expect(JSInterface.validateArgs('nonExistingMethod', args)).toEqual(args);
+    });
+  });
+});
diff --git a/js/js-export/interface.js b/js/js-export/interface.js
index 0d9b5484ce..892e4587a2 100644
--- a/js/js-export/interface.js
+++ b/js/js-export/interface.js
@@ -634,3 +634,7 @@ class JSInterface {
         return finalArgs;
     }
 }
+if (typeof module !== 'undefined' && module.exports) {
+    module.exports = JSInterface;
+  }
+  
\ No newline at end of file