tests for [rand.dist.bern.bin]

llvm-svn: 103612

1 files changed, 67 insertions, 0 deletions

diff --git a/libcxx/test/numerics/rand/rand.dis/rand.dist.bern/rand.dist.bern.bin/eval.pass.cpp b/libcxx/test/numerics/rand/rand.dis/rand.dist.bern/rand.dist.bern.bin/eval.pass.cpp
new file mode 100644
index 00000000000..707c021342c
--- /dev/null
+++ b/libcxx/test/numerics/rand/rand.dis/rand.dist.bern/rand.dist.bern.bin/eval.pass.cpp
@@ -0,0 +1,67 @@
+//===----------------------------------------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+// <random>
+
+// template<class IntType = int>
+// class binomial_distribution
+
+// template<class _URNG> result_type operator()(_URNG& g);
+
+#include <random>
+#include <cassert>
+
+int main()
+{
+    {
+        typedef std::binomial_distribution<> D;
+        typedef D::param_type P;
+        typedef std::minstd_rand0 G;
+        G g;
+        D d(16, .25);
+        int count = 0;
+        int r = 0;
+        for (int i = 0; i < 100; ++i)
+        {
+            D::result_type u = d(g);
+            r += u;
+        }
+        assert(int(r/100. + .5) == 4);
+    }
+    {
+        typedef std::binomial_distribution<> D;
+        typedef D::param_type P;
+        typedef std::minstd_rand0 G;
+        G g;
+        D d(16, .5);
+        int count = 0;
+        int r = 0;
+        for (int i = 0; i < 100; ++i)
+        {
+            D::result_type u = d(g);
+            r += u;
+        }
+        assert(int(r/100. + .5) == 8);
+    }
+    {
+        typedef std::binomial_distribution<> D;
+        typedef D::param_type P;
+        typedef std::minstd_rand0 G;
+        G g;
+        D d(16, .75);
+        int count = 0;
+        int r = 0;
+        for (int i = 0; i < 100; ++i)
+        {
+            D::result_type u = d(g);
+            r += u;
+        }
+        assert(int(r/100. + .5) == 12);
+    }
+}