Fixes exception with Long.toString method. Fixes incorrect getMessage

invocation from unit test runner.

teavm-classlib/src/main/java/org/teavm/classlib/java/lang/TLong.java

@@ -190,7 +190,7 @@ public class TLong extends TNumber implements TComparable<TLong> {
         return toString(i, 2);
     }
 
-    public TString toString(long value) {
+    public static TString toString(long value) {
         return TString.wrap(new TStringBuilder().append(value).toString());
     }
 

teavm-core/src/main/java/org/teavm/tooling/ExceptionHelper.java

@@ -0,0 +1,29 @@
+/*
+ *  Copyright 2014 Alexey Andreev.
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *       http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+package org.teavm.tooling;
+
+/**
+ *
+ * @author Alexey Andreev <konsoletyper@gmail.com>
+ */
+final class ExceptionHelper {
+    private ExceptionHelper() {
+    }
+
+    public static String showException(Throwable e) {
+        return e.getMessage();
+    }
+}

teavm-core/src/main/java/org/teavm/tooling/TeaVMTestTool.java

@@ -290,10 +290,9 @@ public class TeaVMTestTool {
         }
         File file = new File(outputDir, targetName);
         try (Writer innerWriter = new OutputStreamWriter(new FileOutputStream(file), "UTF-8")) {
-            MethodReference cons = new MethodReference(methodRef.getClassName(),
+            MethodReference cons = new MethodReference(methodRef.getClassName(), "<init>", ValueType.VOID);
-                    new MethodDescriptor("<init>", ValueType.VOID));
+            MethodReference exceptionMsg = new MethodReference(ExceptionHelper.class, "showException",
-            MethodReference exceptionMsg = new MethodReference("java.lang.Throwable", "getMessage",
+                    Throwable.class, String.class);
-                    ValueType.object("java.lang.String"));
             vm.entryPoint("initInstance", cons);
             vm.entryPoint("runTest", methodRef).withValue(0, cons.getClassName());
             vm.entryPoint("extractException", exceptionMsg);

teavm-core/src/main/java/org/teavm/tooling/TestExceptionDependency.java

@@ -19,15 +19,14 @@ import org.teavm.dependency.*;
 import org.teavm.model.ClassReader;
 import org.teavm.model.ClassReaderSource;
 import org.teavm.model.MethodReference;
-import org.teavm.model.ValueType;
 
 /**
  *
  * @author Alexey Andreev
  */
 class TestExceptionDependency implements DependencyListener {
-    private MethodReference getMessageRef = new MethodReference("java.lang.Throwable", "getMessage",
+    private MethodReference getMessageRef = new MethodReference(ExceptionHelper.class, "showException",
-            ValueType.object("java.lang.String"));
+            Throwable.class, String.class);
     private DependencyNode allClasses;
 
     @Override
@@ -59,7 +58,7 @@ class TestExceptionDependency implements DependencyListener {
     @Override
     public void methodAchieved(DependencyAgent agent, MethodDependency method) {
         if (method.getReference().equals(getMessageRef)) {
-            allClasses.connect(method.getVariable(0));
+            allClasses.connect(method.getVariable(1));
         }
     }