SdkComponentFactory: Add test showing problem with ambiguous components

Add 3 component implementation for the same version and component type.
Which implementation is returned by getComponentImpl is currently
arbitrary.

Author: bertrand-lorentz

src/test/java/eu/europa/ted/eforms/sdk/component/ScriptGeneratorA.java

@@ -0,0 +1,10 @@
+package eu.europa.ted.eforms.sdk.component;
+
+@SdkComponent(versions = "1", componentType = SdkComponentType.SCRIPT_GENERATOR)
+class ScriptGeneratorA implements TestComponent {
+
+  @Override
+  public String testMethod() {
+    return "A";
+  }
+}

src/test/java/eu/europa/ted/eforms/sdk/component/ScriptGeneratorB.java

@@ -0,0 +1,10 @@
+package eu.europa.ted.eforms.sdk.component;
+
+@SdkComponent(versions = "1", componentType = SdkComponentType.SCRIPT_GENERATOR)
+class ScriptGeneratorB implements TestComponent {
+
+  @Override
+  public String testMethod() {
+    return "B";
+  }
+}

src/test/java/eu/europa/ted/eforms/sdk/component/ScriptGeneratorSubclass.java

@@ -0,0 +1,9 @@
+package eu.europa.ted.eforms.sdk.component;
+
+class ScriptGeneratorSubclass extends ScriptGeneratorA {
+
+  @Override
+  public String testMethod() {
+    return "Subclass";
+  }
+}

src/test/java/eu/europa/ted/eforms/sdk/component/SdkComponentFactoryTest.java

@@ -12,4 +12,16 @@ void testGetComponentImpl() throws InstantiationException {
         factory.getComponentImpl("0.5", SdkComponentType.EFX_EXPRESSION_TRANSLATOR, TestComponent.class);
     assertEquals(MyComponent.class, impl.getClass());
   }
+
+  @Test
+  void testMultipleComponentImpl() throws InstantiationException {
+    MyComponentFactory factory = new MyComponentFactory();
+    TestComponent impl =
+        factory.getComponentImpl("1.0", SdkComponentType.SCRIPT_GENERATOR, TestComponent.class);
+
+    // impl could be either ScriptGeneratorA, ScriptGeneratorB, or ScriptGeneratorSubclass
+    // depending on which was the last found in SdkComponentFactory.populateComponents()
+    assertEquals(ScriptGeneratorSubclass.class, impl.getClass());
+    assertEquals("Subclass", impl.testMethod());
+  }
 }