test: 저장소 구현체 테스트 작성

Author: wonu606

calculator/src/main/java/com/wonu606/calculator/model/CalculationResult.java

@@ -0,0 +1,40 @@
+package com.wonu606.calculator.model;
+
+import java.util.Objects;
+
+public class CalculationResult {
+
+    private final String expression;
+    private final double result;
+
+    public CalculationResult(String expression, double result) {
+        this.expression = expression;
+        this.result = result;
+    }
+
+    public String getExpression() {
+        return expression;
+    }
+
+    public double getResult() {
+        return result;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) {
+            return true;
+        }
+        if (o == null || getClass() != o.getClass()) {
+            return false;
+        }
+        CalculationResult that = (CalculationResult) o;
+        return Double.compare(that.getResult(), getResult()) == 0 && Objects.equals(
+                getExpression(), that.getExpression());
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(getExpression(), getResult());
+    }
+}

calculator/src/test/java/com/wonu606/storage/ResultStoreTest.java

@@ -0,0 +1,93 @@
+package com.wonu606.storage;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.assertThatThrownBy;
+
+import com.wonu606.calculator.model.CalculationResult;
+import com.wonu606.calculator.storage.Persistence;
+import java.util.ArrayList;
+import java.util.List;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+
+public class ResultStoreTest {
+
+    private Persistence store;
+
+    @BeforeEach
+    void setUp() {
+        store.clear();
+    }
+
+    @Test
+    @DisplayName("저장")
+    void testSave() {
+        assertThat(store.findAllResult().size()).isEqualTo(0);
+
+        CalculationResult calculationResult = new CalculationResult("2 + 2", 4.0d);
+        store.saveResult(calculationResult);
+
+        assertThat(store.findAllResult().size()).isEqualTo(1);
+    }
+
+    @Test
+    @DisplayName("순서로 결과 찾기")
+    void testFind() {
+        CalculationResult saveResult = new CalculationResult("5 + 10", 15.0d);
+        store.saveResult(saveResult);
+
+        CalculationResult foundResult = store.findResult(1);
+        assertThat(foundResult).isEqualTo(saveResult);
+    }
+
+    @Test
+    @DisplayName("1 미만의 수로 찾은 경우 예외 발생")
+    void testFindNumberLessThan1() {
+        CalculationResult saveResult = new CalculationResult("5 + 10", 15.0d);
+        store.saveResult(saveResult);
+
+        assertThatThrownBy(() -> store.findResult(0))
+                .isInstanceOf(IllegalArgumentException.class)
+                .hasMessageContaining("잘못된 순번입니다.");
+    }
+
+    @Test
+    @DisplayName("사이즈 초과의 수로 찾은 경우 예외 발생")
+    void testFindNumberMoreThanSize() {
+        CalculationResult saveResult = new CalculationResult("5 + 10", 15.0d);
+        store.saveResult(saveResult);
+
+        assertThatThrownBy(() -> store.findResult(store.findAllResult().size() + 1))
+                .isInstanceOf(IllegalArgumentException.class)
+                .hasMessageContaining("잘못된 순번입니다.");
+    }
+
+    @Test
+    @DisplayName("모두 찾기")
+    void testFindAll() {
+        List<CalculationResult> results = new ArrayList<>();
+        results.add(new CalculationResult("5 + 6", 11.0d));
+        results.add(new CalculationResult("5 + 6", 11.0d));
+
+        for (CalculationResult result : results) {
+            store.saveResult(result);
+        }
+
+        List<CalculationResult> foundResults = store.findAllResult();
+        for (CalculationResult foundResult : foundResults) {
+            assertThat(results.indexOf(foundResult)).isNotEqualTo(-1);
+        }
+    }
+
+    @Test
+    @DisplayName("클리어")
+    void testClear() {
+        store.saveResult(new CalculationResult("11 + 6", 17.0d));
+        store.saveResult(new CalculationResult("11 + 10", 21.0d));
+        assertThat(store.findAllResult().size()).isNotEqualTo(0);
+
+        store.clear();
+        assertThat(store.findAllResult().size()).isEqualTo(0);
+    }
+}