test: 예외 테스트 수정

Author: seong-wooo

src/test/java/lotto/ApplicationTest.java

@@ -8,6 +8,7 @@
 import static camp.nextstep.edu.missionutils.test.Assertions.assertRandomUniqueNumbersInRangeTest;
 import static camp.nextstep.edu.missionutils.test.Assertions.assertSimpleTest;
 import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.assertThatThrownBy;
 
 class ApplicationTest extends NsTest {
     private static final String ERROR_MESSAGE = "[ERROR]";
@@ -48,10 +49,9 @@ class ApplicationTest extends NsTest {
 
     @Test
     void 예외_테스트() {
-        assertSimpleTest(() -> {
-            runException("1000j");
-            assertThat(output()).contains(ERROR_MESSAGE);
-        });
+        assertSimpleTest(() -> assertThatThrownBy(() -> runException("1000j"))
+                .isInstanceOf(IllegalArgumentException.class)
+        );
     }
 
     @Override