Fixed flaky test

generator/src/main/java/com/graphicsfuzz/generator/util/TransformationProbabilities.java

@@ -18,6 +18,8 @@
 
 import com.graphicsfuzz.common.util.IRandom;
 import java.lang.reflect.Field;
+import java.util.Arrays;
+import java.util.Comparator;
 
 public class TransformationProbabilities {
 
@@ -381,7 +383,13 @@ private boolean choose(int threshold, IRandom generator) {
   @Override
   public String toString() {
     String result = "";
-    for (Field field : this.getClass().getDeclaredFields()) {
+    Field[] sortedFields = this.getClass().getDeclaredFields();
+    Arrays.sort(sortedFields, new Comparator<Field>() {
+      public int compare(Field field1, Field field2) {
+        return field1.getName().compareTo(field2.getName());
+      }
+    });
+    for (Field field : sortedFields) {
       if (java.lang.reflect.Modifier.isStatic(field.getModifiers())) {
         continue;
       }

generator/src/test/java/com/graphicsfuzz/generator/util/TransformationProbabilitiesTest.java

@@ -24,20 +24,20 @@ public class TransformationProbabilitiesTest {
 
   @Test
   public void testToString() {
-    assertEquals("probSubstituteFreeVariable: 80\n"
+    assertEquals("probAddDeadFragColorWrites: 5\n"
+        + "probAddLiveFragColorWrites: 5\n"
         + "probDonateDeadCodeAtStmt: 5\n"
         + "probDonateLiveCodeAtStmt: 5\n"
+        + "probInjectDeadBarrierAtStmt: 5\n"
         + "probInjectJumpAtStmt: 5\n"
-        + "probWrapStmtInConditional: 5\n"
         + "probMutatePoint: 3\n"
-        + "probVectorizeStmts: 3\n"
+        + "probOutline: 5\n"
         + "probSplitLoops: 5\n"
         + "probStructify: 3\n"
-        + "probOutline: 5\n"
-        + "probAddLiveFragColorWrites: 5\n"
-        + "probAddDeadFragColorWrites: 5\n"
+        + "probSubstituteFreeVariable: 80\n"
         + "probSwitchify: 5\n"
-        + "probInjectDeadBarrierAtStmt: 5\n",
+        + "probVectorizeStmts: 3\n"
+        + "probWrapStmtInConditional: 5\n",
         TransformationProbabilities.SMALL_PROBABILITIES.toString());
   }