random: add a trivial test of the default generator

This allows us to ensure some level of coverage using tools like ASan.

CMakeLists.txt

@@ -568,6 +568,7 @@ if (TESTS)
         preprocessor
         quaternion
         rand/buckets
+        random
         range
         rational
         region

test/random.cpp

@@ -0,0 +1,34 @@
+#include "tap.hpp"
+
+#include "random.hpp"
+
+#include <iostream>
+
+
+///////////////////////////////////////////////////////////////////////////////
+int
+main ()
+{
+    cruft::TAP::logger tap;
+
+    {
+        constexpr int ITERATIONS = 2048;
+        constexpr int HI = 13;
+        constexpr int LO = 3;
+
+        bool success = true;
+
+        for (int i = 0; i < ITERATIONS; ++i) {
+            auto const val = cruft::random::uniform<int> (LO, HI);
+            if (val < LO || val > HI) {
+                std::cerr << val << '\n';
+                success = false;
+                break;
+            }
+        }
+
+        tap.expect (success, "default uniform random int is within correct range");
+    }
+
+    return tap.status ();
+}