diff --git a/app/src/main/java/com/aria/refactortechniques/MainActivity.kt b/app/src/main/java/com/aria/refactortechniques/MainActivity.kt
index 8782011..93e5946 100644
--- a/app/src/main/java/com/aria/refactortechniques/MainActivity.kt
+++ b/app/src/main/java/com/aria/refactortechniques/MainActivity.kt
@@ -1,7 +1,7 @@
 package com.aria.refactortechniques
 
-import androidx.appcompat.app.AppCompatActivity
 import android.os.Bundle
+import androidx.appcompat.app.AppCompatActivity
 
 class MainActivity : AppCompatActivity() {
 
diff --git a/app/src/main/java/com/aria/refactortechniques/scenario/Coupon.kt b/app/src/main/java/com/aria/refactortechniques/scenario/Coupon.kt
new file mode 100644
index 0000000..17af91d
--- /dev/null
+++ b/app/src/main/java/com/aria/refactortechniques/scenario/Coupon.kt
@@ -0,0 +1,6 @@
+package com.aria.refactortechniques.scenario
+
+data class Coupon(
+    val title: String = "Title",
+    val duration: Int = 100
+)
diff --git a/app/src/main/java/com/aria/refactortechniques/scenario/CouponPresenter.kt b/app/src/main/java/com/aria/refactortechniques/scenario/CouponPresenter.kt
new file mode 100644
index 0000000..b1d9109
--- /dev/null
+++ b/app/src/main/java/com/aria/refactortechniques/scenario/CouponPresenter.kt
@@ -0,0 +1,8 @@
+package com.aria.refactortechniques.scenario
+
+class CouponPresenter(val couponValidatorUseCase: CouponValidatorUseCase) {
+
+    fun setup(coupon: Coupon) {
+        couponValidatorUseCase.validate(coupon)
+    }
+}
\ No newline at end of file
diff --git a/app/src/main/java/com/aria/refactortechniques/scenario/CouponValidatorUseCase.kt b/app/src/main/java/com/aria/refactortechniques/scenario/CouponValidatorUseCase.kt
new file mode 100644
index 0000000..de5eb65
--- /dev/null
+++ b/app/src/main/java/com/aria/refactortechniques/scenario/CouponValidatorUseCase.kt
@@ -0,0 +1,8 @@
+package com.aria.refactortechniques.scenario
+
+const val MAX_TITLE_LENGTH = 100
+
+class CouponValidatorUseCase {
+
+    fun validate(coupon: Coupon) = coupon.title.length < MAX_TITLE_LENGTH
+}
\ No newline at end of file
diff --git a/app/src/main/java/com/aria/refactortechniques/solution/CouponPresenterSolution.kt b/app/src/main/java/com/aria/refactortechniques/solution/CouponPresenterSolution.kt
new file mode 100644
index 0000000..75afffd
--- /dev/null
+++ b/app/src/main/java/com/aria/refactortechniques/solution/CouponPresenterSolution.kt
@@ -0,0 +1,12 @@
+package com.aria.refactortechniques.solution
+
+import com.aria.refactortechniques.scenario.Coupon
+
+class CouponPresenterSolution(
+    private val couponValidatorUseCaseSolution: CouponValidatorUseCaseSolution
+) {
+
+    fun setup(coupon: Coupon) {
+        couponValidatorUseCaseSolution.validate(coupon)
+    }
+}
\ No newline at end of file
diff --git a/app/src/main/java/com/aria/refactortechniques/solution/CouponValidatorUseCaseSolution.kt b/app/src/main/java/com/aria/refactortechniques/solution/CouponValidatorUseCaseSolution.kt
new file mode 100644
index 0000000..422f851
--- /dev/null
+++ b/app/src/main/java/com/aria/refactortechniques/solution/CouponValidatorUseCaseSolution.kt
@@ -0,0 +1,15 @@
+package com.aria.refactortechniques.solution
+
+import com.aria.refactortechniques.scenario.Coupon
+import com.aria.refactortechniques.scenario.MAX_TITLE_LENGTH
+
+class CouponValidatorUseCaseSolution {
+
+    fun validate(coupon: Coupon): Boolean {
+        return validateCoupon(coupon)
+    }
+
+    companion object {
+        fun validateCoupon(coupon: Coupon) = coupon.title.length < MAX_TITLE_LENGTH
+    }
+}
\ No newline at end of file
diff --git a/app/src/test/java/com/aria/refactortechniques/CouponValidatorUseCaseTest.kt b/app/src/test/java/com/aria/refactortechniques/CouponValidatorUseCaseTest.kt
new file mode 100644
index 0000000..2dcac5e
--- /dev/null
+++ b/app/src/test/java/com/aria/refactortechniques/CouponValidatorUseCaseTest.kt
@@ -0,0 +1,34 @@
+package com.aria.refactortechniques
+
+import com.aria.refactortechniques.scenario.Coupon
+import com.aria.refactortechniques.solution.CouponPresenterSolution
+import com.aria.refactortechniques.solution.CouponValidatorUseCaseSolution
+import com.nhaarman.mockitokotlin2.given
+import org.junit.Before
+import org.junit.Test
+
+class CouponValidatorUseCaseSolutionTest {
+
+    private lateinit var sut: CouponPresenterSolution
+    private lateinit var couponValidatorUseCaseSolution: CouponValidatorUseCaseSolution
+
+    @Before
+    fun setup() {
+        sut = CouponPresenterSolution(couponValidatorUseCaseSolution)
+    }
+
+    @Test
+    fun `given valid coupon should validate it properly`() {
+        couponValidatorUseCaseSolution.validate(givenAnyCoupon())
+    }
+
+    @Test
+    fun `given Valid Coupon`() {
+        given(CouponValidatorUseCaseSolution.validateCoupon(givenAnyCoupon()))
+            .willReturn(true)
+    }
+
+    fun givenAnyCoupon(): Coupon {
+        return Coupon("Any", 100)
+    }
+}
\ No newline at end of file
diff --git a/app/src/test/java/com/aria/refactortechniques/ExampleUnitTest.kt b/app/src/test/java/com/aria/refactortechniques/ExampleUnitTest.kt
deleted file mode 100644
index 3e71b77..0000000
--- a/app/src/test/java/com/aria/refactortechniques/ExampleUnitTest.kt
+++ /dev/null
@@ -1,17 +0,0 @@
-package com.aria.refactortechniques
-
-import org.junit.Test
-
-import org.junit.Assert.*
-
-/**
- * Example local unit test, which will execute on the development machine (host).
- *
- * See [testing documentation](http://d.android.com/tools/testing).
- */
-class ExampleUnitTest {
-    @Test
-    fun addition_isCorrect() {
-        assertEquals(4, 2 + 2)
-    }
-}