Adding test cases for placeholder resolution, both with and without t…

…he placeholder set
micronaut-projects · May 6, 2024 · e23f14c · e23f14c
1 parent f72e850
commit e23f14c
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diff --git a/test-suite/src/test/java/io/micronaut/docs/config/value/Engine.java b/test-suite/src/test/java/io/micronaut/docs/config/value/Engine.java
@@ -19,4 +19,6 @@ public interface Engine {
     int getCylinders();
 
     String start();
+
+    String getDescription();
 }
diff --git a/test-suite/src/test/java/io/micronaut/docs/config/value/EngineImpl.java b/test-suite/src/test/java/io/micronaut/docs/config/value/EngineImpl.java
@@ -17,6 +17,7 @@
 
 // tag::imports[]
 import io.micronaut.context.annotation.Value;
+import io.micronaut.core.annotation.Nullable;
 
 import jakarta.inject.Singleton;
 // end::imports[]
@@ -28,6 +29,10 @@ public class EngineImpl implements Engine {
     @Value("${my.engine.cylinders:6}") // <1>
     protected int cylinders;
 
+    @Nullable
+    @Value("${my.engine.description}")
+    protected String description;
+
     @Override
     public int getCylinders() {
         return cylinders;
@@ -38,5 +43,10 @@ public String start() {// <2>
         return "Starting V" + getCylinders() + " Engine";
     }
 
+    @Override
+    public String getDescription() {
+        return description;
+    }
+
 }
 // end::class[]
diff --git a/test-suite/src/test/java/io/micronaut/docs/config/value/VehicleSpec.java b/test-suite/src/test/java/io/micronaut/docs/config/value/VehicleSpec.java
@@ -24,6 +24,7 @@
 import java.util.LinkedHashMap;
 
 import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNull;
 
 class VehicleSpec {
 
@@ -56,4 +57,36 @@ void testStartVehicleWithoutConfiguration() {
         assertEquals("Starting V6 Engine", vehicle.start());
     }
 
+    @Test
+    void testStartVehicleWithNonEmptyPlaceholder() {
+        // tag::start[]
+        ApplicationContext applicationContext = new DefaultApplicationContext("test");
+        LinkedHashMap<String, Object> map = new LinkedHashMap(1);
+        map.put("my.engine.description", "${DESCRIPTION}");
+        map.put("DESCRIPTION", "V8 Engine");
+        applicationContext.getEnvironment().addPropertySource(PropertySource.of("test", map));
+        applicationContext.start();
+
+        Vehicle vehicle = applicationContext.getBean(Vehicle.class);
+        DefaultGroovyMethods.println(this, vehicle.start());
+        // end::start[]
+
+        assertEquals("V8 Engine", vehicle.getEngine().getDescription());
+    }
+
+    @Test
+    void testStartVehicleWithEmptyPlaceholder() {
+        // tag::start[]
+        ApplicationContext applicationContext = new DefaultApplicationContext("test");
+        LinkedHashMap<String, Object> map = new LinkedHashMap(1);
+        map.put("my.engine.description", "${DESCRIPTION}");
+        applicationContext.getEnvironment().addPropertySource(PropertySource.of("test", map));
+        applicationContext.start();
+
+        Vehicle vehicle = applicationContext.getBean(Vehicle.class);
+        DefaultGroovyMethods.println(this, vehicle.start());
+        // end::start[]
+
+        assertNull(vehicle.getEngine().getDescription());
+    }
 }