test:테스트 케이스 추가

Author: whrjsgml0000

src/test/java/calculator/ApplicationTest.java

@@ -61,6 +61,12 @@ public void runMain() {
         });
     }
 
+    @Test
+    public void 마침표_사용(){
+        assertThatThrownBy(() -> runException("1.2.3:4"))
+                .isInstanceOf(IllegalArgumentException.class);
+    }
+
     @Test
     public void 따옴표_구분자_사용() {
         assertSimpleTest(() -> {
@@ -76,4 +82,12 @@ public void runMain() {
             assertThat(output()).contains("결과 : 3");
         });
     }
+
+    @Test
+    public void 문자열_없음(){
+        assertSimpleTest(() -> {
+            run("\n");
+            assertThat(output()).contains("결과 : 0");
+        });
+    }
 }