Add a spec that all InteropLibrary messages are exposed as Truffle::Interop methods

Author: eregon

spec/truffle/interop/methods_spec.rb

@@ -0,0 +1,36 @@
+# truffleruby_primitives: true
+
+# Copyright (c) 2020 Oracle and/or its affiliates. All rights reserved. This
+# code is released under a tri EPL/GPL/LGPL license. You can use it,
+# redistribute it and/or modify it under the terms of the:
+#
+# Eclipse Public License version 2.0, or
+# GNU General Public License version 2, or
+# GNU Lesser General Public License version 2.1.
+
+require_relative '../../ruby/spec_helper'
+
+describe "Truffle::Interop" do
+  it "has a method for each InteropLibrary message" do
+    all_methods = Primitive.interop_library_all_methods
+    all_methods -= %w[getFactory getUncached]
+    expected = all_methods.map do |name|
+      name = name.gsub(/([a-z])([A-Z])/) { "#{$1}_#{$2.downcase}" }
+      if name.start_with?('is_', 'has_', 'fits_')
+        name += '?'
+      end
+      if name.start_with?('is_')
+        name = name[3..-1]
+      elsif name.start_with?('get_')
+        name = name[4..-1]
+      end
+      name.to_sym
+    end.sort
+
+    actual = Truffle::Interop.methods.sort
+
+    # pp expected
+    # pp actual
+    (expected - actual).should == []
+  end
+end

src/main/java/org/truffleruby/interop/InteropNodes.java

@@ -10,6 +10,10 @@
 package org.truffleruby.interop;
 
 import java.io.IOException;
+import java.lang.reflect.Method;
+import java.lang.reflect.Modifier;
+import java.util.ArrayList;
+import java.util.List;
 import java.util.Map;
 
 import com.oracle.truffle.api.dsl.CachedContext;
@@ -93,6 +97,36 @@ public static Object execute(Object receiver, Object[] args, InteropLibrary rece
         }
     }
 
+    @Primitive(name = "interop_library_all_methods")
+    public abstract static class AllMethodsOfInteropLibrary extends PrimitiveArrayArgumentsNode {
+
+        private static final String[] METHODS = publicInteropLibraryMethods();
+
+        @TruffleBoundary
+        @Specialization
+        protected RubyArray allMethodsOfInteropLibrary() {
+            Object[] store = new Object[METHODS.length];
+            for (int i = 0; i < METHODS.length; i++) {
+                store[i] = StringOperations
+                        .createString(this, StringOperations.encodeRope(METHODS[i], UTF8Encoding.INSTANCE));
+            }
+            return createArray(store);
+        }
+
+        private static String[] publicInteropLibraryMethods() {
+            List<String> methods = new ArrayList<>();
+            for (Method method : InteropLibrary.class.getDeclaredMethods()) {
+                if (Modifier.isPublic(method.getModifiers())) {
+                    if (!methods.contains(method.getName())) {
+                        methods.add(method.getName());
+                    }
+                }
+            }
+            return methods.toArray(StringUtils.EMPTY_STRING_ARRAY);
+        }
+
+    }
+
     @CoreMethod(names = "import_file", onSingleton = true, required = 1)
     public abstract static class ImportFileNode extends CoreMethodArrayArgumentsNode {