Add bridge design pattern with test scenario (#46)

Author: mperor

DesignPatterns/src/main/java/pl/mperor/lab/java/design/pattern/structural/bridge/Bus.java

@@ -0,0 +1,10 @@
+package pl.mperor.lab.java.design.pattern.structural.bridge;
+
+public record Bus(Engine engine) implements Vehicle {
+
+    @Override
+    public void run() {
+        engine.start();
+        System.out.println("Bus 🚌 is running!");
+    }
+}

DesignPatterns/src/main/java/pl/mperor/lab/java/design/pattern/structural/bridge/Car.java

@@ -0,0 +1,10 @@
+package pl.mperor.lab.java.design.pattern.structural.bridge;
+
+public record Car(Engine engine) implements Vehicle {
+
+    @Override
+    public void run() {
+        engine.start();
+        System.out.println("Car 🚗 is running!");
+    }
+}

DesignPatterns/src/main/java/pl/mperor/lab/java/design/pattern/structural/bridge/DieselEngine.java

@@ -0,0 +1,9 @@
+package pl.mperor.lab.java.design.pattern.structural.bridge;
+
+public record DieselEngine() implements Engine {
+
+    @Override
+    public void start() {
+        System.out.println("Diesel engine 🟢 has been started!");
+    }
+}

DesignPatterns/src/main/java/pl/mperor/lab/java/design/pattern/structural/bridge/Engine.java

@@ -0,0 +1,6 @@
+package pl.mperor.lab.java.design.pattern.structural.bridge;
+
+public sealed interface Engine permits DieselEngine, PetrolEngine {
+
+    void start();
+}

DesignPatterns/src/main/java/pl/mperor/lab/java/design/pattern/structural/bridge/PetrolEngine.java

@@ -0,0 +1,9 @@
+package pl.mperor.lab.java.design.pattern.structural.bridge;
+
+public record PetrolEngine() implements Engine {
+
+    @Override
+    public void start() {
+        System.out.println("Petrol engine 🟢 has been started!");
+    }
+}

DesignPatterns/src/main/java/pl/mperor/lab/java/design/pattern/structural/bridge/Vehicle.java

@@ -0,0 +1,6 @@
+package pl.mperor.lab.java.design.pattern.structural.bridge;
+
+public sealed interface Vehicle permits Bus, Car {
+
+    void run();
+}

DesignPatterns/src/test/java/pl/mperor/lab/java/design/pattern/structural/bridge/VehicleBridgeTest.java

@@ -0,0 +1,27 @@
+package pl.mperor.lab.java.design.pattern.structural.bridge;
+
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+import pl.mperor.lab.common.TestUtils;
+
+public class VehicleBridgeTest {
+
+    @Test
+    public void shouldAllowToCreateVehiclesWithDifferentEngines() {
+        var out = TestUtils.setTempSystemOut();
+
+        var diselEngineCar = new Car(new DieselEngine());
+        var petrolEngineBus = new Bus(new PetrolEngine());
+
+        diselEngineCar.run();
+        petrolEngineBus.run();
+
+        var outLines = out.lines();
+        Assertions.assertEquals("Diesel engine 🟢 has been started!", outLines.getFirst());
+        Assertions.assertEquals("Car 🚗 is running!", outLines.getSecond());
+        Assertions.assertEquals("Petrol engine 🟢 has been started!", outLines.getThird());
+        Assertions.assertEquals("Bus 🚌 is running!", outLines.getForth());
+
+        TestUtils.resetSystemOut();
+    }
+}