Random: improve rng serialization tests

Author: breznak

src/htm/algorithms/SpatialPooler.hpp

@@ -780,6 +780,9 @@ class SpatialPooler : public Serializable
   void setSeed(UInt seed) {
     rng_ = Random(seed);
   }
+  UInt getSeed() const {
+    return rng_.getSeed();
+  }
 
 
   /**

src/test/unit/algorithms/SpatialPoolerTest.cpp

@@ -1958,8 +1958,8 @@ TEST(SpatialPoolerTest, testSerialization_ar) {
 
   // Save initial trained model
   stringstream ss;
-	ss.precision(std::numeric_limits<double>::digits10 + 1);
-	ss.precision(std::numeric_limits<float>::digits10 + 1);
+//	ss.precision(std::numeric_limits<double>::digits10 + 1);
+//	ss.precision(std::numeric_limits<float>::digits10 + 1);
   sp1.save(ss);
 
   htm::Timer testTimer;
@@ -1975,6 +1975,8 @@ TEST(SpatialPoolerTest, testSerialization_ar) {
     // C - Next, verify the same results come from the de/serialized version
     {
       SpatialPooler spTemp;
+      ASSERT_EQ(spTemp.getSeed(), 1u);
+
       testTimer.start();
 
       // Deserialize

src/test/unit/utils/RandomTest.cpp

@@ -180,7 +180,11 @@ TEST(RandomTest, testSerialization2) {
 
 TEST(RandomTest, testSerialization_ar) {
   // test serialization/deserialization
-  Random r1(862973);
+  const UInt SEED = 862973u;
+  Random r1(SEED);
+  ASSERT_EQ(r1.getSeed(), SEED) << "RNG seed not set properly";
+
+  //burn-in
   for (int i = 0; i < 100; i++)
     r1.getUInt32();
 
@@ -196,14 +200,14 @@ TEST(RandomTest, testSerialization_ar) {
   // r1 and r2 should be identical
   EXPECT_EQ(r1, r2) << "load from serialization";
   EXPECT_EQ(r2.getUInt32(), 3537119063u) << "Deserialized is not deterministic";
-  r1.getUInt32(); //move the same number of steps
+  EXPECT_EQ(r1.getUInt32(), 3537119063u); //move the same number of steps
 
-  UInt32 v1, v2;
   for (int i = 0; i < 100; i++) {
-    v1 = r1.getUInt32();
-    v2 = r2.getUInt32();
-    EXPECT_EQ(v1, v2) << "serialization";
+    EXPECT_EQ(r1.getUInt32(), r2.getUInt32()) << "serialization";
   }
+
+  EXPECT_EQ(r2.getSeed(), SEED) << "Rng deserialized seed is not the same!";
+
 }