Add test to check async virtual call resolution. Fix bug in async unit

tests support

teavm-classlib/src/test/java/org/teavm/classlib/java/lang/ThreadTest.java

@@ -16,6 +16,8 @@
 package org.teavm.classlib.java.lang;
 
 import static org.junit.Assert.*;
+import java.util.ArrayList;
+import java.util.List;
 import org.junit.Test;
 
 /**
@@ -28,7 +30,7 @@ public class ThreadTest {
         long start = System.currentTimeMillis();
         Thread.sleep(100);
         long duration = System.currentTimeMillis() - start;
-        assertTrue("Thread.sleed did not wait enogh", duration < 100);
+        assertTrue("Thread.sleed did not wait enogh", duration >= 100);
     }
 
     @Test
@@ -41,8 +43,34 @@ public class ThreadTest {
         }
     }
 
+
     private void throwException() {
         Thread.yield();
         throw new IllegalStateException();
     }
+
+    @Test
+    public void asyncVirtualCallsSupported() {
+        List<A> alist = new ArrayList<>();
+        alist.add(new A() {
+            @Override int foo() {
+                return 3;
+            }
+        });
+        alist.add(new A() {
+            @Override int foo() {
+                Thread.yield();
+                return 5;
+            }
+        });
+        int sum = 0;
+        for (A a : alist) {
+            sum += a.foo();
+        }
+        assertEquals(8, sum);
+    }
+
+    abstract class A {
+        abstract int foo();
+    }
 }

teavm-core/src/main/java/org/teavm/javascript/Renderer.java

@@ -923,7 +923,9 @@ public class Renderer implements ExprVisitor, StatementVisitor, RenderingContext
                 writer.append(" $return($rt_asyncResult(");
             }
             if (statement.getResult() != null) {
+                if (!async) {
                     writer.append(' ');
+                }
                 prevCallSite = debugEmitter.emitCallSite();
                 statement.getResult().acceptVisitor(this);
                 debugEmitter.emitCallSite();

teavm-core/src/main/java/org/teavm/vm/TeaVM.java

@@ -537,7 +537,7 @@ public class TeaVM implements TeaVMHost, ServiceRepository {
     private List<ClassNode> modelToAst(ListableClassHolderSource classes) {
         AsyncMethodFinder asyncFinder = new AsyncMethodFinder(dependencyChecker.getCallGraph(), diagnostics);
         asyncFinder.find(classes);
-        asyncMethods.addAll(asyncMethods);
+        asyncMethods.addAll(asyncFinder.getAsyncMethods());
 
         progressListener.phaseStarted(TeaVMPhase.DECOMPILATION, classes.getClassNames().size());
         Decompiler decompiler = new Decompiler(classes, classLoader, asyncFinder.getAsyncMethods());