./test/tc_array.rb in extensions-0.5.0 vs ./test/tc_array.rb in extensions-0.6.0

@@ -21,7 +21,27 @@
     assert_equal([0,1,2,3], a, "select all")
     a = [0,1,2,3]
     assert_equal([], a.select! {false}, "select none")
     assert_equal([], a, "select none")
   end
+
+  def test_only
+    assert_equal(5,   [5].only)
+    assert_equal(nil, [nil].only)
+    assert_raise(IndexError) { [].only }
+    assert_raise(IndexError) { [1,2,3].only }
+  end
+
+  def test_rand
+    array = [1,2,3]
+    seen = Hash.new { |hash, key| hash[key] = 0 }
+    1000.times do
+      n = array.rand
+      seen[n] += 1
+    end
+    assert_equal([1,2,3], seen.keys.sort)
+    assert(seen[1] > 100)
+    assert(seen[2] > 100)
+    assert(seen[3] > 100)
+  end
 end  # class TC_Array