最終成果

Author: taba-atsu

build.gradle

@@ -13,7 +13,7 @@ version = '1.0-SNAPSHOT'
 ext.junitJupiterVersion  = '5.12.2'
 
 java {
-    sourceCompatibility = '23'
+    sourceCompatibility = '21'
 }
 
 tasks.withType(AbstractCompile) each { it.options.encoding = 'UTF-8' }

src/main/java/tddbc/ClosedInterval.java

@@ -0,0 +1,24 @@
+package tddbc;
+
+public class ClosedInterval {
+
+    public int minNum;
+    public  int maxNum;
+
+    public ClosedInterval(int minNum,int maxNum) throws Exception {
+        if (minNum > maxNum) {
+           throw new Exception("上端は下端より大きい必要があります");
+        }
+        this.minNum = minNum;
+        this.maxNum = maxNum;
+    }
+
+    public  boolean isContainedNum(int num){
+        return num >= this.minNum && num <= this.maxNum;
+    }
+
+    public  String returnFormattedString(){
+        return String.format("[%d,%d]", this.minNum, this.maxNum);
+    }
+}
+

src/test/java/tddbc/ClosedIntervalTest.java

@@ -0,0 +1,69 @@
+package tddbc;
+
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Nested;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+public class ClosedIntervalTest {
+    @Nested
+    class _上端下端点を設定することができる {
+        @Test
+        @DisplayName("有効な値であるため設定できる")
+        void _setValidNumber ()throws Exception {
+            int minNum = 10;
+            int maxNum = 100;
+            ClosedInterval interval = new ClosedInterval(minNum, maxNum);
+            assertEquals(minNum, interval.minNum);
+            assertEquals(maxNum, interval.maxNum);
+        }
+    }
+
+    @Nested
+    class _指定された整数が含まれるか判定する{
+        @Test
+        @DisplayName("有効な値だとtrueを返す")
+        void _validValue()throws  Exception  {
+            int minNum = 3;
+            int maxNum = 7;
+            ClosedInterval interval = new ClosedInterval(minNum,maxNum);
+            assertTrue(interval.isContainedNum(5));
+        }
+
+        @Test
+        @DisplayName("無効な値だとfalseを返す")
+        void _invalidValue()throws  Exception  {
+            int minNum = 3;
+            int maxNum = 7;
+            ClosedInterval interval = new ClosedInterval(minNum,maxNum);
+            assertFalse(interval.isContainedNum(0));
+            assertFalse(interval.isContainedNum(10));
+        }
+
+        @Test
+        @DisplayName("境界値を正しく判定する")
+        void _boundaryValue()throws  Exception  {
+            int minNum = 3;
+            int maxNum = 7;
+            ClosedInterval interval = new ClosedInterval(minNum,maxNum);
+            assertFalse(interval.isContainedNum(2));
+            assertFalse(interval.isContainedNum(8));
+            assertTrue(interval.isContainedNum(3));
+            assertTrue(interval.isContainedNum(7));
+        }
+    }
+
+    @Nested
+    class _整数閉区間を文字列表記で返す{
+
+        @Test
+        @DisplayName("正しい区間を正しい形式の文字列で返すことができる")
+        void _returnCorrectString() throws  Exception{
+            int minNum = 3;
+            int maxNum = 7;
+            ClosedInterval interval = new ClosedInterval(minNum,maxNum);
+            assertEquals("[3,7]",interval.returnFormattedString());
+        }
+    }
+}

src/test/java/tddbc/SampleTest.java

@@ -15,6 +15,8 @@ public void _should_return_Hello_TDD_BootCamp() throws Exception {
         String actual = sut.say();
         // Verify
         assertEquals("Hello TDD BootCamp!", actual);
+
+
     }
 
 }