Add integration tests for KmpAdapter

PiperOrigin-RevId: 907186879

Author: weijunkong

translator/src/main/java/com/google/devtools/j2objc/translate/ObjectiveCKmpMethodTranslator.java

@@ -748,7 +748,7 @@ private NativeTypeVisitor(
     public Void visitDeclared(DeclaredType type, StringBuilder builder) {
       builder.append(toNativeType(type, methodExecutable, referencedTypes));
       List<? extends TypeMirror> typeArguments = type.getTypeArguments();
-      if (!typeArguments.isEmpty()) {
+      if (options.asObjCGenericDecl() && !typeArguments.isEmpty()) {
         String typeArgsString = buildTypeArgumentString(typeArguments);
         builder.append("<").append(typeArgsString).append(">");
       }

translator/src/test/java/com/google/devtools/j2objc/translate/ObjectiveCKmpMethodTranslatorTest.java

@@ -24,6 +24,7 @@ public class ObjectiveCKmpMethodTranslatorTest extends GenerationTest {
   @Override
   public void setUp() throws IOException {
     super.setUp();
+    options.load(new String[] {"--objc-generics"});
     addSourceFile(
         """
         package com.google.common.collect;
@@ -276,7 +277,8 @@ public List<List<String>> getMatrix() {
     assertInTranslation(
         testImplementation,
         "return (NSArray<NSArray<NSString *> *> *) [Adapter"
-            + " fromJavaUtilList_JavaUtilList_WithJavaUtilList:(id<JavaUtilList>) [self getMatrix]]");
+            + " fromJavaUtilList_JavaUtilList_WithJavaUtilList:(id<JavaUtilList>) [self"
+            + " getMatrix]]");
   }
 
   /** Tests mixed nested collection conversion with @ObjectiveCKmpMethod. */
@@ -1061,7 +1063,6 @@ public ImmutableList<CustomClass> getItems() {
     assertNotInTranslation(
         concreteHeader, "- (void)setItems:(NSArray<MyPkgCustomClass *> *)items;");
     assertNotInTranslation(concreteHeader, "- (NSArray<MyPkgCustomClass *> *)getItems;");
-    assertNotInTranslation(concreteHeader, "@class MyPkgCustomClass;");
 
     String concreteImpl = translateSourceFile("ConcreteClass", "ConcreteClass.m");
     assertNotInTranslation(concreteImpl, "- (void)setItems:(NSArray<MyPkgCustomClass *> *)items {");
@@ -1405,6 +1406,37 @@ void ConstTest_initWithList_(ConstTest *self_, NSArray<NSString *> *list) {
         """);
   }
 
+  public void testObjCGenerics() throws IOException {
+
+    addSourceFile(
+        """
+        import com.google.j2objc.annotations.ObjectiveCKmpMethod;
+        import java.util.List;
+        public class GenericsOn {
+          @ObjectiveCKmpMethod(selector="setList:", adapter=Adapter.class)
+          public void setList(List<String> list) {}
+        }
+        """,
+        "GenericsOn.java");
+    String headerOn = translateSourceFile("GenericsOn", "GenericsOn.h");
+    assertInTranslation(headerOn, "- (void)setList:(NSArray<NSString *> *)list;");
+
+    options.setAsObjCGenericDecl(false);
+    addSourceFile(
+        """
+        import com.google.j2objc.annotations.ObjectiveCKmpMethod;
+        import java.util.List;
+        public class GenericsOff {
+          @ObjectiveCKmpMethod(selector="setList:", adapter=Adapter.class)
+          public void setList(List<String> list) {}
+        }
+        """,
+        "GenericsOff.java");
+    String headerOff = translateSourceFile("GenericsOff", "GenericsOff.h");
+    assertInTranslation(headerOff, "- (void)setList:(NSArray *)list;");
+    options.setAsObjCGenericDecl(true);
+  }
+
   public void testSetOfBooleanFails() throws IOException {
     addSourceFile(
         """