なんらかの値じゃなくて与えた値がそのまま入っていて欲しい

sin-tanaka · Aug 1, 2020 · 28fb443 · 28fb443
1 parent 08c6e91
commit 28fb443
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Showing 2 changed files with 21 additions and 8 deletions.
diff --git a/lib/closedInterval.js b/lib/closedInterval.js
@@ -1,3 +1,8 @@
-class ClosedInterval {}
+class ClosedInterval {
+  constructor(lowerBound, upperBound) {
+    this.upperBound = upperBound;
+    this.lowerBound = lowerBound;
+  }
+}
 
 module.exports.ClosedInterval = ClosedInterval;
diff --git a/lib/closedInterval_test.js b/lib/closedInterval_test.js
@@ -5,11 +5,19 @@ test("閉区間のインスタンスを作れる", () => {
   expect(closedInterval).toBeInstanceOf(ClosedInterval);
 });
 
-test("できたインスタンスは下端点をもつ", () => {
-  const closedInterval = new ClosedInterval();
-  expect(closedInterval).toHaveProperty('lowerBound');
-});
-test("できたインスタンスは上端点をもつ", () => {
-  const closedInterval = new ClosedInterval();
-  expect(closedInterval).toHaveProperty('upperBound');
+describe("できたインスタンスは", () => {
+  describe("下端点をもつ", () => {
+    test("なんらかの値がある", () => {
+      const lowerBound = 0;
+      const closedInterval = new ClosedInterval(lowerBound);
+      expect(closedInterval).toHaveProperty('lowerBound', lowerBound);
+    });
+  });
+
+  test("上端点をもつ", () => {
+    const anyLowerBound = 0;
+    const upperBound = 1;
+    const closedInterval = new ClosedInterval(anyLowerBound, upperBound);
+    expect(closedInterval).toHaveProperty('upperBound', upperBound);
+  });
 });