refactor: refactor test

src/test/java/domain/CarTest.java

@@ -0,0 +1,30 @@
+package domain;
+
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+public class CarTest {
+    @DisplayName("숫자가 4 미만이면 움직이지 않는다.")
+    @Test
+    void moveTestSmallerThanFour() {
+        Car car = new Car();
+        NumberGenerator numberGenerator = new StaticNumberGenerator(3);
+
+        car.move(numberGenerator);
+
+        assertThat(car.getCurrentPosition()).extracting("value").isEqualTo(0);
+    }
+
+    @DisplayName("숫자가 4 이상이면 움직인다.")
+    @Test
+    void moveTestLargerThanOrEqualToFour() {
+        Car car = new Car();
+        NumberGenerator numberGenerator = new StaticNumberGenerator(5);
+
+        car.move(numberGenerator);
+
+        assertThat(car.getCurrentPosition()).extracting("value").isEqualTo(1);
+    }
+}

src/test/java/domain/CarsTest.java

@@ -3,12 +3,8 @@
 import org.junit.jupiter.api.DisplayName;
 import org.junit.jupiter.api.Test;
 
-import java.io.ByteArrayOutputStream;
-import java.io.PrintStream;
-
 import static org.assertj.core.api.InstanceOfAssertFactories.list;
 import static org.assertj.core.api.Assertions.assertThat;
-import static org.assertj.core.api.BDDAssertions.as;
 
 public class CarsTest {
     @DisplayName("입력받은 숫자만큼 자동차를 생성한다.")
@@ -20,26 +16,4 @@ void generateCarsTest() {
 
         assertThat(cars).extracting("cars").asInstanceOf(list(Car.class)).hasSize(numberOfCars);
     }
-
-    @DisplayName("숫자가 4 미만이면 움직이지 않는다.")
-    @Test
-    void moveTestSmallerThanFour() {
-        Cars cars = new Cars(1);
-        NumberGenerator numberGenerator = new StaticNumberGenerator(3);
-
-        cars.move(numberGenerator);
-
-        assertThat(cars.getCurrentPositions()).first().extracting("value").isEqualTo(0);
-    }
-
-    @DisplayName("숫자가 4 이상이면 움직인다.")
-    @Test
-    void moveTestLargerThanOrEqualToFour() {
-        Cars cars = new Cars(1);
-        NumberGenerator numberGenerator = new StaticNumberGenerator(5);
-
-        cars.move(numberGenerator);
-
-        assertThat(cars.getCurrentPositions()).first().extracting("value").isEqualTo(1);
-    }
 }