test: 계산기 동작 테스트

Author: hyeon-z

app/src/test/java/calculator/CalculatorTest.java

@@ -0,0 +1,41 @@
+package calculator;
+
+import function.Calculation;
+import function.Storage;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+public class CalculatorTest {
+    @DisplayName("중위표현식을 후위표현식으로 변환한다.")
+    @Test
+    void checkPostfixExpression() {
+        final String infixExp = "3 + 5 * 2 / ( 7 - 2 )";
+        final String postfixExp = "3 5 2 * 7 2 - / + ";
+
+        final Calculation calculation = new Calculation();
+        assertThat(calculation.convertPostfix(infixExp)).isEqualTo(postfixExp);
+    }
+
+    @DisplayName("후위표현식을 계산한 결과를 출력한다.")
+    @Test
+    void checkResult() {
+        final String postfixExp = "3 5 2 * 7 2 - / +";
+        final double result = 5;
+
+        final Calculation calculation = new Calculation();
+        assertThat(calculation.calculatePostfix(postfixExp)).isEqualTo(result);
+    }
+
+    @DisplayName("계산한 결과가 저장된다.")
+    @Test
+    void checkStore() {
+        final String exp1 = "2 + 3 = 5";
+
+        final Storage storage = new Storage();
+        storage.store(exp1);
+
+        assertThat(storage.print().replace("\n", "")).isEqualTo(exp1);
+    }
+}