Add some tests for the new executor system

And fix a couple of bugs picked up by said tests

build.gradle

@@ -197,3 +197,9 @@ gradle.projectsEvaluated {
 
 runClient.outputs.upToDateWhen { false }
 runServer.outputs.upToDateWhen { false }
+
+test {
+    testLogging {
+        events "failed", "standardOut", "standardError"
+    }
+}

src/main/java/dan200/computercraft/api/lua/ILuaObject.java

@@ -44,10 +44,12 @@ public interface ILuaObject
      *                  for the possible values and conversion rules.
      * @return An array of objects, representing the values you wish to return to the Lua program. See
      * {@link MethodResult#of(Object...)}  for the valid values and conversion rules.
-     * @throws LuaException         If the task could not be queued, or if the task threw an exception.
+     * @throws LuaException         If you throw any exception from this function, a lua error will be raised with the
+     *                              same message as your exception. Use this to throw appropriate errors if the wrong
+     *                              arguments are supplied to your method.
      * @throws InterruptedException If the user shuts down or reboots the computer the coroutine is suspended,
      *                              InterruptedException will be thrown. This exception must not be caught or
-     *                              intercepted, or the computer will leak memory and end up in a broken state.w
+     *                              intercepted, or the computer will leak memory and end up in a broken state.
      * @see IPeripheral#callMethod(IComputerAccess, ILuaContext, int, Object[])
      * @deprecated Use {@link #callMethod(ICallContext, int, Object[])} instead.
      */
@@ -68,12 +70,14 @@ public interface ILuaObject
      *                  for the possible values and conversion rules.
      * @return The result of calling this method. Use {@link MethodResult#empty()} to return nothing or
      * {@link MethodResult#of(Object...)} to return several values.
-     * @throws LuaException If the task could not be queued, or if the task threw an exception.
+     * @throws LuaException         If you throw any exception from this function, a lua error will be raised with the
+     *                              same message as your exception. Use this to throw appropriate errors if the wrong
+     *                              arguments are supplied to your method.
      * @see IPeripheral#callMethod(IComputerAccess, ICallContext, int, Object[])
      * @see MethodResult
      */
     @Nonnull
-    @SuppressWarnings({ "deprecation" })
+    @SuppressWarnings( { "deprecation" } )
     default MethodResult callMethod( @Nonnull ICallContext context, int method, @Nonnull Object[] arguments ) throws LuaException
     {
         return MethodResult.withLuaContext( lua -> callMethod( lua, method, arguments ) );

src/main/java/dan200/computercraft/api/lua/MethodResult.java

@@ -89,16 +89,17 @@ public abstract class MethodResult
      * Normally you'll wish to consume the event using {@link #then(ILuaFunction)}. This can be done slightly more
      * easily with {@link #pullEvent(String, ILuaFunction)}.
      *
+     * @param filter The event name to filter on.
      * @return The constructed method result. This evaluates to the name of the event that occurred, and any event
      * parameters.
      * @see #pullEvent(String, ILuaFunction)
      * @see #pullEvent()
      */
     @Nonnull
-    public static MethodResult pullEvent( @Nonnull String event )
+    public static MethodResult pullEvent( @Nonnull String filter )
     {
-        Preconditions.checkNotNull( event, "event cannot be null" );
+        Preconditions.checkNotNull( filter, "event cannot be null" );
-        return new OnEvent( false, event );
+        return new OnEvent( false, filter );
     }
 
     /**
@@ -108,6 +109,7 @@ public abstract class MethodResult
      * If you want to listen to a specific event, it's easier to use {@link #pullEvent(String, ILuaFunction)} rather
      * than running until the desired event is found.
      *
+     * @param callback The function to call when the event is received.
      * @return The constructed method result. This evaluates to the result of the {@code callback}.
      * @see #pullEvent()
      * @see #pullEvent(String, ILuaFunction)
@@ -123,6 +125,8 @@ public abstract class MethodResult
      * Wait for the specified event to occur on the computer, suspending the coroutine until it arises. This method to
      * {@link #pullEvent(String)} and {@link #then(ILuaFunction)}.
      *
+     * @param filter   The event name to filter on.
+     * @param callback The function to call when the event is received.
      * @return The constructed method result. This evaluates to the result of the {@code callback}.
      * @see #pullEvent(String)
      * @see #pullEvent(ILuaFunction)
@@ -151,19 +155,21 @@ public abstract class MethodResult
      * The same as {@link #pullEvent(String)}, except {@code terminated} events are also passed to the callback, instead
      * of throwing an error. Only use this if you want to prevent program termination, which is not recommended.
      *
+     * @param filter The event name to filter on.
      * @return The constructed method result. This evaluates to the name of the event that occurred, and any event
      * parameters.
      */
     @Nonnull
-    public static MethodResult pullEventRaw( @Nonnull String event )
+    public static MethodResult pullEventRaw( @Nonnull String filter )
     {
-        return new OnEvent( true, event );
+        return new OnEvent( true, filter );
     }
 
     /**
      * The same as {@link #pullEvent(ILuaFunction)}, except {@code terminated} events are also passed to the callback,
      * instead of throwing an error. Only use this if you want to prevent program termination, which is not recommended.
      *
+     * @param callback The function to call when the event is received.
      * @return The constructed method result. This evaluates to the result of the {@code callback}.
      */
     @Nonnull
@@ -178,6 +184,8 @@ public abstract class MethodResult
      * callback, instead of throwing an error. Only use this if you want to prevent program termination, which is not
      * recommended.
      *
+     * @param filter   The event name to filter on.
+     * @param callback The function to call when the event is received.
      * @return The constructed method result. This evaluates to the result of the {@code callback}.
      */
     @Nonnull
@@ -237,6 +245,8 @@ public abstract class MethodResult
      *
      * @param context The context to execute with.
      * @return The resulting values.
+     * @throws LuaException         If an error was thrown while executing one of the methods within this future.
+     * @throws InterruptedException If the user shuts down or reboots the computer while the coroutine is suspended.
      * @see #withLuaContext(ILuaContextTask)
      * @deprecated This should not be used except to interface between the two call systems.
      */

src/main/java/dan200/computercraft/core/lua/CobaltLuaContext.java

@@ -157,11 +157,14 @@ class CobaltLuaContext extends CobaltCallContext implements ILuaContext
         } );
     }
 
-    Object[] resume( LuaState state, CobaltLuaMachine machine, Object[] args ) throws LuaError, UnwindThrowable
+    void resume( Object[] args )
     {
         values = args;
         resume.signal();
+    }
 
+    Object[] await( LuaState state, CobaltLuaMachine machine ) throws LuaError, UnwindThrowable
+    {
         if( !done )
         {
             try
@@ -170,14 +173,12 @@ class CobaltLuaContext extends CobaltCallContext implements ILuaContext
             }
             catch( InterruptedException e )
             {
-                state.debug.onReturn();
                 throw new LuaError( "Java Exception Thrown: " + e.toString(), 0 );
             }
         }
 
         if( done )
         {
-            state.debug.onReturn();
             if( exception != null ) throw exception;
             return values;
         }

src/main/java/dan200/computercraft/core/lua/CobaltLuaMachine.java

@@ -235,6 +235,7 @@ public class CobaltLuaMachine implements ILuaMachine
         }
         catch( LuaError e )
         {
+            if( ComputerCraft.logPeripheralErrors ) ComputerCraft.log.error( "Main thread crashed", e );
             m_mainRoutine.abandon();
             m_mainRoutine = null;
         }

src/main/java/dan200/computercraft/core/lua/CobaltWrapperFunction.java

@@ -13,8 +13,6 @@ import dan200.computercraft.api.lua.LuaException;
 import dan200.computercraft.api.lua.MethodResult;
 import dan200.computercraft.core.computer.Computer;
 import org.squiddev.cobalt.*;
-import org.squiddev.cobalt.debug.DebugFrame;
-import org.squiddev.cobalt.debug.DebugHandler;
 import org.squiddev.cobalt.debug.DebugState;
 import org.squiddev.cobalt.function.VarArgFunction;
 
@@ -62,12 +60,19 @@ class CobaltWrapperFunction extends VarArgFunction implements Resumable<CobaltWr
             throw new LuaError( "Java Exception Thrown: " + e.toString(), 0 );
         }
 
+        // Verify we've a "well formed" future
         if( future == null )
         {
             ComputerCraft.log.error( "Null result from " + delegate );
             throw new LuaError( "Java Exception Thrown: Null result" );
         }
 
+        // Fast path for immediate results
+        if( future instanceof MethodResult.Immediate )
+        {
+            return machine.toValues( ((MethodResult.Immediate) future).getResult() );
+        }
+
         State context = new State();
         try
         {
@@ -75,12 +80,11 @@ class CobaltWrapperFunction extends VarArgFunction implements Resumable<CobaltWr
         }
         catch( UnwindThrowable e )
         {
-            // Push our state onto the stack if need-be.
+            // Push our state onto the stack if need-be. Normally this wouldn't be safe and we 
-            DebugHandler handler = state.debug;
+            // should do this at the very beginning, but we know that we won't be calling anything 
-            DebugState ds = handler.getDebugState();
+            // else which will push to the resume stack.
-            DebugFrame di = handler.onCall( ds, this );
+            DebugState ds = state.debug.getDebugState();
-            di.state = context;
+            state.debug.onCall( ds, this, context );
-
             throw e;
         }
     }
@@ -88,11 +92,10 @@ class CobaltWrapperFunction extends VarArgFunction implements Resumable<CobaltWr
     @Override
     public Varargs resume( LuaState state, State context, Varargs args ) throws LuaError, UnwindThrowable
     {
+        Varargs result;
         try
         {
-            Varargs result = doResume( state, context, args );
+            result = doResume( state, context, args );
-            state.debug.onReturn();
-            return result;
         }
         catch( LuaError e )
         {
@@ -104,6 +107,9 @@ class CobaltWrapperFunction extends VarArgFunction implements Resumable<CobaltWr
             state.debug.onReturn();
             throw new LuaError( e );
         }
+
+        state.debug.onReturn();
+        return result;
     }
 
     private Varargs doResume( LuaState state, State context, Varargs args ) throws LuaError, UnwindThrowable
@@ -126,7 +132,7 @@ class CobaltWrapperFunction extends VarArgFunction implements Resumable<CobaltWr
                 if( args.arg( 3 ).toBoolean() )
                 {
                     // Extract the return values from the event and return them
-                    return runCallback( state, context, CobaltLuaMachine.toObjects( args, 4 ) );
+                    return runFuture( state, context, context.taskResult );
                 }
                 else
                 {
@@ -142,7 +148,8 @@ class CobaltWrapperFunction extends VarArgFunction implements Resumable<CobaltWr
         }
         else if( future instanceof MethodResult.WithLuaContext )
         {
-            return runCallback( state, context, context.luaContext.resume( state, machine, CobaltLuaMachine.toObjects( args, 1 ) ) );
+            context.luaContext.resume( CobaltLuaMachine.toObjects( args, 1 ) );
+            return runCallback( state, context, context.luaContext.await( state, machine ) );
         }
         else
         {
@@ -223,6 +230,7 @@ class CobaltWrapperFunction extends VarArgFunction implements Resumable<CobaltWr
                 context.pending = future;
                 CobaltLuaContext luaContext = context.luaContext = new CobaltLuaContext( computer, state );
                 luaContext.execute( withContext.getConsumer() );
+                return runCallback( state, context, luaContext.await( state, machine ) );
             }
             else
             {

src/test/java/dan200/computercraft/core/computer/FakeComputerEnvironment.java

@@ -0,0 +1,91 @@
+/*
+ * This file is part of ComputerCraft - http://www.computercraft.info
+ * Copyright Daniel Ratcliffe, 2011-2018. Do not distribute without permission.
+ * Send enquiries to dratcliffe@gmail.com
+ */
+
+package dan200.computercraft.core.computer;
+
+import dan200.computercraft.ComputerCraft;
+import dan200.computercraft.api.filesystem.IMount;
+import dan200.computercraft.api.filesystem.IWritableMount;
+import dan200.computercraft.core.filesystem.FileMount;
+import net.minecraftforge.fml.common.Loader;
+
+import java.io.File;
+import java.io.InputStream;
+import java.net.URL;
+
+public class FakeComputerEnvironment implements IComputerEnvironment
+{
+    private final boolean colour;
+    private final int id;
+
+    public FakeComputerEnvironment( int id, boolean colour )
+    {
+        this.colour = colour;
+        this.id = id;
+    }
+
+    @Override
+    public int getDay()
+    {
+        return 0;
+    }
+
+    @Override
+    public double getTimeOfDay()
+    {
+        return 0;
+    }
+
+    @Override
+    public boolean isColour()
+    {
+        return colour;
+    }
+
+    @Override
+    public int assignNewID()
+    {
+        return id;
+    }
+
+    @Override
+    public IWritableMount createSaveDirMount( String subPath, long capacity )
+    {
+        return new FileMount( new File( "computer/" + subPath ), capacity );
+    }
+
+    @Override
+    public IMount createResourceMount( String domain, String subPath )
+    {
+        String fullPath = "assets/" + domain + "/" + subPath;
+        URL url = ComputerCraft.class.getProtectionDomain().getCodeSource().getLocation();
+        File file = new File( url.getPath(), fullPath );
+        if( !file.exists() ) file = new File( "src/main/resources", fullPath );
+
+        if( !file.exists() ) throw new RuntimeException( "Cannot find ROM in " + file );
+
+        return new FileMount( file, 0 );
+    }
+
+    @Override
+    public InputStream createResourceFile( String domain, String subPath )
+    {
+        String fullPath = "assets/" + domain + "/" + subPath;
+        return ComputerCraft.class.getClassLoader().getResourceAsStream( fullPath );
+    }
+
+    @Override
+    public long getComputerSpaceLimit()
+    {
+        return ComputerCraft.computerSpaceLimit;
+    }
+
+    @Override
+    public String getHostString()
+    {
+        return "ComputerCraft ${version} (Minecraft " + Loader.MC_VERSION + ")";
+    }
+}

src/test/java/dan200/computercraft/core/computer/RunOnComputer.java

@@ -0,0 +1,155 @@
+/*
+ * This file is part of ComputerCraft - http://www.computercraft.info
+ * Copyright Daniel Ratcliffe, 2011-2018. Do not distribute without permission.
+ * Send enquiries to dratcliffe@gmail.com
+ */
+
+package dan200.computercraft.core.computer;
+
+import dan200.computercraft.ComputerCraft;
+import dan200.computercraft.api.lua.*;
+import dan200.computercraft.core.terminal.Terminal;
+import org.apache.logging.log4j.LogManager;
+
+import javax.annotation.Nonnull;
+import javax.annotation.Nullable;
+import java.io.OutputStream;
+import java.nio.charset.StandardCharsets;
+import java.util.Objects;
+import java.util.function.Consumer;
+
+import static org.junit.Assert.fail;
+
+public final class RunOnComputer
+{
+    public static final int STARTUP_TIMEOUT = 10;
+    public static final int RUN_TIMEOUT = 100;
+
+    public static void run( String task ) throws Exception
+    {
+        run( task, x -> {
+        } );
+    }
+
+    public static void run( String task, Consumer<Computer> setup ) throws Exception
+    {
+        if( ComputerCraft.log == null ) ComputerCraft.log = LogManager.getLogger( "computercraft" );
+        ComputerCraft.logPeripheralErrors = true;
+
+        // Setup computer
+        Terminal terminal = new Terminal( ComputerCraft.terminalWidth_computer, ComputerCraft.terminalHeight_computer );
+        Computer computer = new Computer( new FakeComputerEnvironment( 0, true ), terminal, 0 );
+
+        // Register APIS
+        TestAPI api = new TestAPI( computer );
+        computer.addAPI( api );
+        setup.accept( computer );
+
+        // Setup the startup file
+        try( OutputStream stream = computer.getRootMount().openForWrite( "startup.lua" ) )
+        {
+            String program = "" +
+                "local function exec()\n" +
+                "  " + task + "\n" +
+                "end\n" +
+                "test.finish(pcall(exec))\n";
+            stream.write( program.getBytes( StandardCharsets.UTF_8 ) );
+        }
+
+        // Turn on
+        ComputerThread.start();
+        computer.turnOn();
+
+        // Run until shutdown or we timeout
+        boolean everOn = false;
+        int ticks = 0;
+        do
+        {
+            computer.advance( 0.05 );
+            MainThread.executePendingTasks();
+
+            Thread.sleep( 50 );
+            ticks++;
+            everOn |= computer.isOn();
+        }
+        while( (computer.isOn() || (!everOn && ticks < STARTUP_TIMEOUT)) && ticks <= RUN_TIMEOUT );
+
+        // If we never finished (say, startup errored) then print the terminal. Otherwise throw the error
+        // where needed.
+        if( !api.finished )
+        {
+            int height = terminal.getHeight() - 1;
+            while( height >= 0 && terminal.getLine( height ).toString().trim().isEmpty() ) height--;
+            for( int y = 0; y <= height; y++ )
+            {
+                System.out.printf( "%2d | %s\n", y + 1, terminal.getLine( y ) );
+            }
+
+            fail( "Computer never finished" );
+        }
+        else if( api.error != null )
+        {
+            fail( api.error );
+        }
+
+        ComputerThread.stop();
+    }
+
+    private static class TestAPI implements ILuaAPI
+    {
+        private final Computer computer;
+
+        private boolean finished = false;
+        private String error;
+
+        private TestAPI( Computer computer )
+        {
+            this.computer = computer;
+        }
+
+        @Override
+        public String[] getNames()
+        {
+            return new String[]{ "test" };
+        }
+
+        @Nonnull
+        @Override
+        public String[] getMethodNames()
+        {
+            return new String[]{ "log", "finish" };
+        }
+
+        @Nullable
+        @Override
+        @Deprecated
+        public Object[] callMethod( @Nonnull ILuaContext context, int method, @Nonnull Object[] arguments ) throws LuaException, InterruptedException
+        {
+            return callMethod( (ICallContext) context, method, arguments ).evaluate( context );
+        }
+
+        @Nonnull
+        @Override
+        public MethodResult callMethod( @Nonnull ICallContext context, int method, @Nonnull Object[] arguments )
+        {
+            switch( method )
+            {
+                case 0:
+                    ComputerCraft.log.info( Objects.toString( arguments.length <= 0 ? null : arguments[0] ) );
+                    return MethodResult.empty();
+                case 1:
+                {
+                    if( arguments.length <= 0 || arguments[0] == null || arguments[0] == Boolean.FALSE )
+                    {
+                        error = Objects.toString( arguments.length <= 1 ? null : arguments[1] );
+                    }
+                    finished = true;
+                    computer.shutdown();
+                    return MethodResult.empty();
+                }
+                default:
+                    return MethodResult.empty();
+            }
+        }
+    }
+}

src/test/java/dan200/computercraft/core/lua/CobaltWrapperFunctionTest.java

@@ -0,0 +1,243 @@
+/*
+ * This file is part of ComputerCraft - http://www.computercraft.info
+ * Copyright Daniel Ratcliffe, 2011-2018. Do not distribute without permission.
+ * Send enquiries to dratcliffe@gmail.com
+ */
+
+package dan200.computercraft.core.lua;
+
+import dan200.computercraft.api.lua.*;
+import dan200.computercraft.core.computer.RunOnComputer;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.Parameterized;
+
+import javax.annotation.Nonnull;
+import javax.annotation.Nullable;
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.stream.Collectors;
+
+
+@RunWith( Parameterized.class )
+public class CobaltWrapperFunctionTest
+{
+    @Parameterized.Parameter( 0 )
+    public String name;
+
+    @Parameterized.Parameter( 1 )
+    public String code;
+
+    @Parameterized.Parameters( name = "{0}" )
+    public static Collection<Object[]> parameters()
+    {
+        return Arrays.stream( new Object[][]{
+            new Object[]{ "empty", "assert(select('#', funcs.empty()) == 0)" },
+            new Object[]{ "identity", "assert(select('#', funcs.identity(1, 2, 3)) == 3)" },
+
+            new Object[]{ "pullEvent", "os.queueEvent('test') assert(funcs.pullEvent() == 'test')" },
+            new Object[]{ "pullEventTerminate", "os.queueEvent('terminate') assert(not pcall(funcs.pullEvent))" },
+
+            new Object[]{ "pullEventRaw", "os.queueEvent('test') assert(funcs.pullEventRaw() == 'test')" },
+            new Object[]{ "pullEventRawTerminate", "os.queueEvent('terminate') assert(funcs.pullEventRaw() == 'terminate')" },
+
+            new Object[]{ "mainThread", "assert(funcs.mainThread() == 1)" },
+            new Object[]{ "mainThreadMany", "for i = 1, 4 do assert(funcs.mainThread() == 1) end" }
+        } ).collect( Collectors.toList() );
+    }
+
+    /**
+     * Tests executing functions defined through the {@link MethodResult} API.
+     */
+    @Test
+    public void testMethodResult() throws Exception
+    {
+        RunOnComputer.run( code, c -> c.addAPI( new MethodResultAPI() ) );
+    }
+
+    /**
+     * Tests executing functions defined through the {@link MethodResult} API called with the
+     * {@link ILuaContext} evaluator.
+     */
+    @Test
+    public void testMethodResultEvaluate() throws Exception
+    {
+        RunOnComputer.run( code, c -> c.addAPI( new WrapperAPI( new MethodResultAPI() )
+        {
+            @Nullable
+            @Override
+            @Deprecated
+            public Object[] callMethod( @Nonnull ILuaContext context, int method, @Nonnull Object[] arguments ) throws LuaException, InterruptedException
+            {
+                return callMethod( (ICallContext) context, method, arguments ).evaluate( context );
+            }
+        } ) );
+    }
+
+    /**
+     * Tests using {@link MethodResult#then(ILuaFunction)} afterwards
+     */
+    @Test
+    public void testMethodResultThen() throws Exception
+    {
+        RunOnComputer.run( code, c -> c.addAPI( new WrapperAPI( new MethodResultAPI() ) {
+            @Nonnull
+            @Override
+            public MethodResult callMethod( @Nonnull ICallContext context, int method, @Nonnull Object[] arguments ) throws LuaException
+            {
+                return super.callMethod( context, method, arguments )
+                    .then( x -> MethodResult.onMainThread( () -> MethodResult.of( x ).then( MethodResult::of ) ) )
+                    .then( MethodResult::of );
+            }
+        } ) );
+    }
+
+    /**
+     * Tests executing functions defined through the {@link ILuaContext} API.
+     */
+    @Test
+    public void testLuaContext() throws Exception
+    {
+        RunOnComputer.run( code, c -> c.addAPI( new LuaContextAPI() ) );
+    }
+
+    /**
+     * Tests executing functions defined through the {@link ILuaContext} API called with the
+     * {@link MethodResult} evaluator.
+     */
+    @Test
+    public void testWithLuaContext() throws Exception
+    {
+        RunOnComputer.run( code, c -> c.addAPI( new WrapperAPI( new LuaContextAPI() )
+        {
+            @Nonnull
+            @Override
+            @SuppressWarnings( "deprecation" )
+            public MethodResult callMethod( @Nonnull ICallContext context, int method, @Nonnull Object[] arguments ) throws LuaException
+            {
+                return MethodResult.withLuaContext( c -> callMethod( c, method, arguments ) );
+            }
+        } ) );
+    }
+
+    private static class MethodResultAPI implements ILuaAPI
+    {
+        @Override
+        public String[] getNames()
+        {
+            return new String[]{ "funcs" };
+        }
+
+        @Nonnull
+        @Override
+        public String[] getMethodNames()
+        {
+            return new String[]{ "empty", "identity", "pullEvent", "pullEventRaw", "mainThread" };
+        }
+
+        @Nullable
+        @Override
+        @Deprecated
+        public Object[] callMethod( @Nonnull ILuaContext context, int method, @Nonnull Object[] arguments ) throws LuaException, InterruptedException
+        {
+            return callMethod( (ICallContext) context, method, arguments ).evaluate( context );
+        }
+
+        @Nonnull
+        @Override
+        public MethodResult callMethod( @Nonnull ICallContext context, int method, @Nonnull Object[] arguments )
+        {
+            switch( method )
+            {
+                case 0:
+                    return MethodResult.empty();
+                case 1:
+                    return MethodResult.of( arguments );
+                case 2:
+                    return MethodResult.pullEvent( "test" );
+                case 3:
+                    return MethodResult.pullEventRaw( "test" );
+                case 4:
+                    return MethodResult.onMainThread( () -> MethodResult.of( 1 ) );
+                default:
+                    return MethodResult.empty();
+            }
+        }
+    }
+
+    private static class LuaContextAPI implements ILuaAPI
+    {
+        @Override
+        public String[] getNames()
+        {
+            return new String[]{ "funcs" };
+        }
+
+        @Nonnull
+        @Override
+        public String[] getMethodNames()
+        {
+            return new String[]{ "empty", "identity", "pullEvent", "pullEventRaw", "mainThread" };
+        }
+
+        @Nullable
+        @Override
+        @Deprecated
+        public Object[] callMethod( @Nonnull ILuaContext context, int method, @Nonnull Object[] arguments ) throws LuaException, InterruptedException
+        {
+            switch( method )
+            {
+                case 0:
+                    return null;
+                case 1:
+                    return arguments;
+                case 2:
+                    return context.pullEvent( "test" );
+                case 3:
+                    return context.pullEventRaw( "test" );
+                case 4:
+                    return context.executeMainThreadTask( () -> new Object[]{ 1 } );
+                default:
+                    return null;
+            }
+        }
+    }
+
+    public static class WrapperAPI implements ILuaAPI
+    {
+        private final ILuaAPI api;
+
+        public WrapperAPI( ILuaAPI api )
+        {
+            this.api = api;
+        }
+
+        @Override
+        public String[] getNames()
+        {
+            return api.getNames();
+        }
+
+        @Nonnull
+        @Override
+        public String[] getMethodNames()
+        {
+            return api.getMethodNames();
+        }
+
+        @Nullable
+        @Override
+        @Deprecated
+        public Object[] callMethod( @Nonnull ILuaContext context, int method, @Nonnull Object[] arguments ) throws LuaException, InterruptedException
+        {
+            return api.callMethod( context, method, arguments );
+        }
+
+        @Nonnull
+        @Override
+        public MethodResult callMethod( @Nonnull ICallContext context, int method, @Nonnull Object[] arguments ) throws LuaException
+        {
+            return api.callMethod( context, method, arguments );
+        }
+    }
+}

src/test/java/dan200/computercraft/shared/wired/NetworkTest.java

@@ -4,8 +4,9 @@ import com.google.common.collect.Maps;
 import com.google.common.collect.Sets;
 import dan200.computercraft.ComputerCraft;
 import dan200.computercraft.api.ComputerCraftAPI;
+import dan200.computercraft.api.lua.ICallContext;
 import dan200.computercraft.api.lua.ILuaContext;
-import dan200.computercraft.api.lua.LuaException;
+import dan200.computercraft.api.lua.MethodResult;
 import dan200.computercraft.api.network.wired.IWiredElement;
 import dan200.computercraft.api.network.wired.IWiredNetwork;
 import dan200.computercraft.api.network.wired.IWiredNetworkChange;
@@ -249,7 +250,7 @@ public class NetworkTest
     }
 
     @Test
-    @Ignore("Takes a long time to run, mostly for stress testing")
+    @Ignore( "Takes a long time to run, mostly for stress testing" )
     public void testLarge()
     {
         final int BRUTE_SIZE = 16;
@@ -410,11 +411,19 @@ public class NetworkTest
 
         @Nullable
         @Override
-        public Object[] callMethod( @Nonnull IComputerAccess computer, @Nonnull ILuaContext context, int method, @Nonnull Object[] arguments ) throws LuaException, InterruptedException
+        @Deprecated
+        public Object[] callMethod( @Nonnull IComputerAccess computer, @Nonnull ILuaContext context, int method, @Nonnull Object[] arguments )
         {
             return new Object[0];
         }
 
+        @Nonnull
+        @Override
+        public MethodResult callMethod( @Nonnull IComputerAccess computer, @Nonnull ICallContext context, int method, @Nonnull Object[] arguments )
+        {
+            return MethodResult.empty();
+        }
+
         @Override
         public boolean equals( @Nullable IPeripheral other )
         {
@@ -427,7 +436,7 @@ public class NetworkTest
         private final int size;
         private final T[] box;
 
-        @SuppressWarnings("unchecked")
+        @SuppressWarnings( "unchecked" )
         public Grid( int size )
         {
             this.size = size;