refactoring : speculative generality - remove dead code

refactoring/src/main/java/com/example/refactoring/_15_speculative_generality/_35_remove_dead_code/Reservation.java

@@ -0,0 +1,28 @@
+package com.example.refactoring._15_speculative_generality._35_remove_dead_code;
+
+import java.time.LocalDateTime;
+
+public class Reservation {
+
+    private String title;
+
+    private LocalDateTime from;
+
+    private LocalDateTime to;
+
+    private LocalDateTime alarm;
+
+    public Reservation(String title, LocalDateTime from, LocalDateTime to) {
+        this.title = title;
+        this.from = from;
+        this.to = to;
+    }
+
+    public void setAlarmBefore(int minutes) {
+        this.alarm = this.from.minusMinutes(minutes);
+    }
+
+    public LocalDateTime getAlarm() {
+        return alarm;
+    }
+}

refactoring/src/main/java/com/example/refactoring/_15_speculative_generality/_35_remove_dead_code/_before/Reservation.java

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+package com.example.refactoring._15_speculative_generality._35_remove_dead_code._before;
+
+import java.time.LocalDateTime;
+
+public class Reservation {
+
+    private String title;
+
+    private LocalDateTime from;
+
+    private LocalDateTime to;
+
+    private LocalDateTime alarm;
+
+    public Reservation(String title, LocalDateTime from, LocalDateTime to) {
+        this.title = title;
+        this.from = from;
+        this.to = to;
+    }
+
+    public void setAlarmBefore(int minutes) {
+        this.alarm = this.from.minusMinutes(minutes);
+    }
+
+    public LocalDateTime getAlarm() {
+        return alarm;
+    }
+}

refactoring/src/test/java/com/example/refactoring/_15_speculative_generality/_35_remove_dead_code/ReservationTest.java

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+package com.example.refactoring._15_speculative_generality._35_remove_dead_code;
+
+import org.junit.jupiter.api.Test;
+
+import java.time.LocalDateTime;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+class ReservationTest {
+
+    @Test
+    void reservation() {
+        Reservation reservation = new Reservation(
+                "tennis",
+                LocalDateTime.of(2022, 1, 20, 19, 30),
+                LocalDateTime.of(2022, 1, 20, 9, 0));
+        reservation.setAlarmBefore(30);
+        assertEquals(LocalDateTime.of(2022, 1, 20, 19, 0), reservation.getAlarm());
+    }
+}