Add tests for interfaces (#67)

README.md

@@ -132,6 +132,9 @@ as you have to ensure that bridge methods are implemented on all the classes tha
 for example by adding `@WithBridgeMethods` on every implementation of the method in question,
 or by introducing a base class that provides a bridge method.
 
+For adapter methods, the bridge method annotation on the interface does not need to declare the
+interface, but the bridge method annotation on the interface does.
+
 See the Javadoc for more details:
 
 - [`bridge-method-annotation`](https://javadoc.jenkins.io/component/bridge-method-annotation/)

injector/src/test/client/Main.java

@@ -35,9 +35,7 @@ public static void main(String[] args) throws Exception {
 
         // using reflection to ensure that JIT isn't doing inlining
         check((Foo)Foo.class.newInstance(),args[0]);
-
-        // still a work in progress
-//        check((Bar)Bar.class.newInstance(),args[0]);
+        check((Bar)Bar.class.newInstance(),args[0]);
 
         Adapter a = new Adapter();
         assertEquals(1,a.i());
@@ -72,5 +70,8 @@ private static void check(IBar f, String expected) {
 
         String n = f.widen();
         assertEquals(expected,n);
+
+        String u = f.adapter();
+        assertEquals("http://example.com/", u);
     }
 }

injector/src/test/v1/Bar.java

@@ -1,4 +1,5 @@
 public class Bar implements IBar {
     public String widen()  { return "foo"; }
     public Object narrow() { return "foo"; }
+    public String adapter() { return "http://example.com/"; }
 }

injector/src/test/v1/IBar.java

@@ -1,4 +1,5 @@
 public interface IBar {
     String widen();
     Object narrow();
+    String adapter();
 }

injector/src/test/v2/Bar.java

@@ -1,4 +1,25 @@
+import com.infradna.tool.bridge_method_injector.WithBridgeMethods;
+import java.io.UncheckedIOException;
+import java.net.MalformedURLException;
+import java.net.URL;
+
 public class Bar implements IBar {
+    @WithBridgeMethods(value = String.class, castRequired = true)
     public Object widen()  { return "bar"; }
+
+    @WithBridgeMethods(Object.class)
     public String narrow() { return "bar"; }
+
+    @WithBridgeMethods(value = String.class, adapterMethod = "convert")
+    public URL adapter() {
+        try {
+            return new URL("http://example.com/");
+        } catch (MalformedURLException e) {
+            throw new UncheckedIOException(e);
+        }
+    }
+
+    private Object convert(URL url, Class<?> type) {
+        return url.toString();
+    }
 }

injector/src/test/v2/IBar.java

@@ -1,8 +1,11 @@
 import com.infradna.tool.bridge_method_injector.WithBridgeMethods;
+import java.net.URL;
 
 public interface IBar {
     @WithBridgeMethods(value=String.class,castRequired=true)
     Object widen();
     @WithBridgeMethods(Object.class)
     String narrow();
+    @WithBridgeMethods(String.class)
+    URL adapter();
 }