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extern/STLport/5.2.1/test/unit/rndshf_test.cpp

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+#include <numeric>
+#include <vector>
+#include <algorithm>
+
+#include "iota.h"
+#include "cppunit/cppunit_proxy.h"
+
+#if !defined (STLPORT) || defined(_STLP_USE_NAMESPACES)
+using namespace std;
+#endif
+
+//
+// TestCase class
+//
+class RndShuffleTest : public CPPUNIT_NS::TestCase
+{
+  class MyRandomGenerator
+  {
+    public:
+      unsigned long operator()(unsigned long n_)
+        {
+        return rand() % n_;
+        }
+  };
+  CPPUNIT_TEST_SUITE(RndShuffleTest);
+  CPPUNIT_TEST(rndshuf0);
+  CPPUNIT_TEST(rndshuf2);
+  CPPUNIT_TEST_SUITE_END();
+
+protected:
+  void rndshuf0();
+  void rndshuf2();
+};
+
+CPPUNIT_TEST_SUITE_REGISTRATION(RndShuffleTest);
+
+//
+// tests implementation
+//
+void RndShuffleTest::rndshuf0()
+{
+  int numbers[6] = { 1, 2, 3, 4, 5, 6 };
+
+  random_shuffle(numbers, numbers + 6);
+
+  CPPUNIT_ASSERT(count(numbers, numbers+6, 1)==1);
+  CPPUNIT_ASSERT(count(numbers, numbers+6, 2)==1);
+  CPPUNIT_ASSERT(count(numbers, numbers+6, 3)==1);
+  CPPUNIT_ASSERT(count(numbers, numbers+6, 4)==1);
+  CPPUNIT_ASSERT(count(numbers, numbers+6, 5)==1);
+  CPPUNIT_ASSERT(count(numbers, numbers+6, 6)==1);
+}
+void RndShuffleTest::rndshuf2()
+{
+  vector <int> v1(10);
+  __iota(v1.begin(), v1.end(), 0);
+
+  MyRandomGenerator r;
+  for(int i = 0; i < 3; i++)
+  {
+    random_shuffle(v1.begin(), v1.end(), r);
+    CPPUNIT_ASSERT(count(v1.begin(), v1.end(), 0)==1);
+    CPPUNIT_ASSERT(count(v1.begin(), v1.end(), 1)==1);
+    CPPUNIT_ASSERT(count(v1.begin(), v1.end(), 2)==1);
+    CPPUNIT_ASSERT(count(v1.begin(), v1.end(), 3)==1);
+    CPPUNIT_ASSERT(count(v1.begin(), v1.end(), 4)==1);
+    CPPUNIT_ASSERT(count(v1.begin(), v1.end(), 5)==1);
+    CPPUNIT_ASSERT(count(v1.begin(), v1.end(), 6)==1);
+    CPPUNIT_ASSERT(count(v1.begin(), v1.end(), 7)==1);
+    CPPUNIT_ASSERT(count(v1.begin(), v1.end(), 8)==1);
+    CPPUNIT_ASSERT(count(v1.begin(), v1.end(), 9)==1);
+  }
+}