diff --git a/app/src/main/java/com/coderabbit/app/calculator/Car.kt b/app/src/main/java/com/coderabbit/app/calculator/Car.kt
new file mode 100644
index 0000000..b4b4fdb
--- /dev/null
+++ b/app/src/main/java/com/coderabbit/app/calculator/Car.kt
@@ -0,0 +1,14 @@
+package com.coderabbit.app.calculator
+
+class Car {
+
+    fun startEngine(): Boolean {
+        println("Engine is starting...")
+        return true
+    }
+
+    fun isEngineStarted(): Boolean {
+        // Simulate engine status
+        return true
+    }
+}
\ No newline at end of file
diff --git a/app/src/test/java/com/coderabbit/app/calculator/CarTest.kt b/app/src/test/java/com/coderabbit/app/calculator/CarTest.kt
new file mode 100644
index 0000000..b6691b4
--- /dev/null
+++ b/app/src/test/java/com/coderabbit/app/calculator/CarTest.kt
@@ -0,0 +1,16 @@
+package com.coderabbit.app.calculator
+
+import org.junit.Assert.assertTrue
+
+
+class CarTest {
+
+    fun startEngine() {
+        // Arrange
+        val car = Car()
+        // Act
+        val result = car.startEngine()
+        // Assert
+        assertTrue(result)
+    }
+}
\ No newline at end of file