[GR-20150] Make top-level methods available in the Context#getBindings().

PullRequest: truffleruby/1197

Author: Nicolas Laurent

CHANGELOG.md

@@ -51,6 +51,7 @@ Bug fixes:
 * Fixed `Symbol#to_proc` to create proc with nil `source_location` (#1663).
 * Make `GC.start` work with keyword arguments.
 * Fixed `Kernel#clone` for `nil`, `true`, `false`, `Integer`, and `Symbol`.
+* Make top-level methods available in `Context#getBindings()` (#1838).
 
 Compatibility:
 

src/main/java/org/truffleruby/RubyLanguage.java

@@ -10,7 +10,6 @@
 package org.truffleruby;
 
 import java.util.Arrays;
-import java.util.Collections;
 
 import com.oracle.truffle.api.Assumption;
 import com.oracle.truffle.api.CompilerDirectives.CompilationFinal;
@@ -277,7 +276,9 @@ protected Iterable<Scope> findLocalScopes(RubyContext context, Node node, Frame
 
     @Override
     protected Iterable<Scope> findTopScopes(RubyContext context) {
-        return Collections.singletonList(GlobalScope.getGlobalScope(context.getCoreLibrary().globalVariables));
+        return Arrays.asList(
+                GlobalScope.getGlobalScope(context.getCoreLibrary().globalVariables),
+                Scope.newBuilder("main", context.getCoreLibrary().mainObject).build());
     }
 
     public String getTruffleLanguageHome() {

src/test/java/org/truffleruby/PolyglotInteropTest.java

@@ -193,4 +193,20 @@ public void testLocalVariablesAreNotSharedBetweenInteractiveAndNonInteractive()
         }
     }
 
+    @Test
+    public void testTopScopes() {
+        try (Context context = Context.create()) {
+            Value bindings = context.getBindings("ruby");
+            assertTrue(bindings.getMember("$DEBUG").isBoolean());
+
+            context.eval("ruby", "def my_test_method(); 42; end");
+            Value myMethod = bindings.getMember("my_test_method");
+            assertTrue(myMethod.canExecute());
+            assertEquals(myMethod.execute().asInt(), 42);
+
+            Value formatMethod = bindings.getMember("format");
+            assertTrue(formatMethod.canExecute());
+            assertEquals(formatMethod.execute("hello").asString(), "hello");
+        }
+    }
 }