Add test to highlight #209

Author: big-andy-coates

test-project/greeter.provider/src/test/java/examples/greeter/ModuleReaderTest.java

@@ -0,0 +1,25 @@
+package examples.greeter;
+
+import java.lang.module.ModuleReader;
+import java.util.List;
+import java.util.stream.Collectors;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+class ModuleReaderTest {
+    @Test
+    void testList() throws Exception {
+        ModuleReader reader = ModuleReaderTest.class.getModule()
+                .getLayer()
+                .configuration()
+                .findModule("greeter.provider")
+                .orElseThrow()
+                .reference()
+                .open();
+
+        List<String> content = reader.list().collect(Collectors.toList());
+
+        assertFalse(content.isEmpty());
+    }
+}