Add registerMapAdapter test

Author: seven332

library/src/androidTest/java/com/hippo/quickjs/android/TypeAdapterTest.java

@@ -20,10 +20,13 @@
 import org.junit.Test;
 
 import java.lang.reflect.Type;
+import java.util.Map;
 import java.util.concurrent.atomic.AtomicInteger;
 
 import static org.junit.Assert.assertEquals;
 
+import android.util.ArrayMap;
+
 public class TypeAdapterTest {
 
   @Test
@@ -68,4 +71,55 @@ public TypeAdapter<?> create(QuickJS quickJS, Type type) {
       return null;
     }
   }
+
+  @Test
+  public void registerMapAdapter() {
+    Type mapType = new JavaType<Map<String, String>>() {}.type;
+
+    QuickJS quickJS = new QuickJS.Builder()
+        .registerTypeAdapter(mapType, new MapTypeAdapter().nullable())
+        .build();
+    try (JSRuntime runtime = quickJS.createJSRuntime()) {
+      try (JSContext context = runtime.createJSContext()) {
+        Map<String, String> actual = context.evaluate(
+            "a = { key1: \"value1\", key2: \"value2\" }", "test.js", mapType);
+        Map<String, String> expected = new ArrayMap<>();
+        expected.put("key1", "value1");
+        expected.put("key2", "value2");
+        assertEquals(expected, actual);
+      }
+    }
+  }
+
+  private static class MapTypeAdapter extends TypeAdapter<Map<String, String>> {
+    @Override
+    public JSValue toJSValue(JSContext context, Map<String, String> value) {
+      JSObject jo = context.createJSObject();
+      value.forEach((k, v) -> {
+        if (k == null) return;
+        jo.setProperty(k, context.createJSString(v));
+      });
+      return jo;
+    }
+
+    @Override
+    public Map<String, String> fromJSValue(JSContext context, JSValue value) {
+      JSObject jo = value.cast(JSObject.class);
+      JSFunction keysFunction = context.getGlobalObject()
+          .getProperty("Object").cast(JSObject.class)
+          .getProperty("keys").cast(JSFunction.class);
+
+      TypeAdapter<String[]> adapter = context.quickJS.getAdapter(String[].class);
+      JSValue keysResult = keysFunction.invoke(null, new JSValue[] { jo });
+      String[] keys = adapter.fromJSValue(context, keysResult);
+
+      Map<String, String> map = new ArrayMap<>(keys.length);
+      for (String key: keys) {
+        String val = jo.getProperty(key).cast(JSString.class).getString();
+        map.put(key, val);
+      }
+
+      return map;
+    }
+  }
 }