[test] allow list injection for tests (#761)

* [test] allow list injection for tests

now can do
```java
@InjectTest
class ListInject {

  @Inject List<Somei> testSomei;

  @test
  void test() {

    assertThat(testSomei).isNotEmpty();
  }
}
```

* also optional

* Update MetaReader.java

* remove if

Author: SentryMan

inject-test/src/main/java/io/avaje/inject/test/MetaReader.java

@@ -1,24 +1,27 @@
 package io.avaje.inject.test;
 
-import io.avaje.inject.BeanScope;
-import io.avaje.inject.BeanScopeBuilder;
-import jakarta.inject.Inject;
-import jakarta.inject.Named;
-import jakarta.inject.Qualifier;
-import org.mockito.ArgumentCaptor;
-import org.mockito.Captor;
-import org.mockito.Mock;
-import org.mockito.Spy;
-import org.mockito.internal.configuration.plugins.Plugins;
-import org.mockito.internal.util.reflection.GenericMaster;
-
 import java.lang.annotation.Annotation;
 import java.lang.reflect.Field;
 import java.lang.reflect.Modifier;
+import java.lang.reflect.ParameterizedType;
 import java.lang.reflect.Type;
 import java.util.ArrayList;
 import java.util.LinkedList;
 import java.util.List;
+import java.util.Optional;
+
+import org.mockito.ArgumentCaptor;
+import org.mockito.Captor;
+import org.mockito.Mock;
+import org.mockito.Spy;
+import org.mockito.internal.configuration.plugins.Plugins;
+import org.mockito.internal.util.reflection.GenericMaster;
+
+import io.avaje.inject.BeanScope;
+import io.avaje.inject.BeanScopeBuilder;
+import jakarta.inject.Inject;
+import jakarta.inject.Named;
+import jakarta.inject.Qualifier;
 
 final class MetaReader {
 
@@ -349,9 +352,28 @@ Object get(Object instance) {
     }
 
     void setFromScope(BeanScope beanScope, Object testInstance) throws IllegalAccessException {
-      if (!valueAlreadyProvided) {
-        set(field, beanScope.get(type(), name), testInstance);
+      if (valueAlreadyProvided) {
+        return;
+      }
+      final var type = type();
+
+      if (type instanceof ParameterizedType) {
+        final var parameterizedType = (ParameterizedType) type;
+        final var rawType = parameterizedType.getRawType();
+        final var typeArguments = parameterizedType.getActualTypeArguments();
+
+        if (rawType.equals(List.class)) {
+          set(field, beanScope.list(typeArguments[0]), testInstance);
+          return;
+        }
+
+        if (rawType.equals(Optional.class)) {
+          set(field, beanScope.getOptional(typeArguments[0], name), testInstance);
+          return;
+        }
       }
+
+      set(field, beanScope.get(type, name), testInstance);
     }
 
     void setFromPlugin(Object value, Object testInstance) throws IllegalAccessException {

inject-test/src/test/java/org/example/coffee/list/ListInject.java

@@ -0,0 +1,22 @@
+package org.example.coffee.list;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+import java.util.List;
+
+import org.junit.jupiter.api.Test;
+
+import io.avaje.inject.test.InjectTest;
+import jakarta.inject.Inject;
+
+@InjectTest
+class ListInject {
+
+  @Inject List<Somei> testSomei;
+
+  @Test
+  void test() {
+
+    assertThat(testSomei).isNotEmpty();
+  }
+}