Fix full tests.

tests/full/DieHardTest.php

@@ -0,0 +1,56 @@
+<?php
+class DieHardTest extends PHPUnit_Framework_TestCase
+{
+    /**
+     * Birthday spacings: Choose random points on a large interval. 
+     * The spacings between the points should be asymptotically exponentially
+     * distributed.
+     */
+    public function testBirthday()
+    {
+        // Number of buckets to make
+        $num_buckets = 17;
+        $rand_min = 200000;
+        $rand_max = 600000;
+        $rand_step = 100000;
+
+        for ($nums_to_generate = $rand_min; $nums_to_generate < $rand_max; $nums_to_generate += $rand_step) {
+            $buckets = array_fill(0, $num_buckets, 0);
+
+            // The number of ints we expect per bucket +/- 2%;
+            $min = (int) ceil(0.97 * $nums_to_generate / $num_buckets);
+            $max = (int) floor(1.03 * $nums_to_generate / $num_buckets);
+
+            for ($i = 0; $i < $nums_to_generate; ++$i) {
+                $random = random_int(0, 999);
+                $bucket = $random % $num_buckets;
+                $buckets[$bucket]++;
+            }
+            for ($i = 0; $i < $num_buckets; ++$i) {
+
+                // Debugging code:
+
+                if ($buckets[$i] <= $min ) {
+                    var_dump([
+                        'bucket' => $i,
+                        'value' => $buckets[$i], 
+                        'min' => $min, 
+                        'nums' => $nums_to_generate,
+                        'reason' => 'below min'
+                    ]);
+                }
+                if ($buckets[$i] >= $max ) {
+                    var_dump([
+                        'bucket' => $i,
+                        'value' => $buckets[$i],
+                        'maax' => $max,
+                        'nums' => $nums_to_generate,
+                        'reason' => 'above max'
+                    ]);
+                }
+
+                $this->assertTrue($buckets[$i] < $max && $buckets[$i] > $min);
+            }
+        }
+    }
+}

tests/full/StatTests.php → tests/full/StatTest.php

@@ -1,6 +1,6 @@
 <?php
 
-class StatTests extends PHPUnit_Framework_TestCase
+class StatTest extends PHPUnit_Framework_TestCase
 {
     /**
      * All possible values should be > 30% but less than 170%