#1 Updated readme, added test cases for examples.

README.md

@@ -56,9 +56,9 @@ Each part is separated by one or more whitespaces. It is thus important to keep
   * 0, 3, 40-50 * * * * ?
   
 `Day of month` and `day of week` are mutually exclusive so one of them must at always be ignored using
-the '?'-character unless one field already is something other than '*'. 
+the '?'-character to ensure that it is not possible to specify a statement which results in an impossible mix of these fields. 
 
-# Examples
+## Examples
 
 |Expression | Meaning
 | --- | --- |
@@ -67,7 +67,22 @@ the '?'-character unless one field already is something other than '*'.
 | 0 0 12 1/2 * ?	| Every 2 days, starting on the 1st at noon
 | 0 0 */12 ? * * | Every twelve hours
 
-# Third party libraries
+# Randomization
+
+The standard cron format does not allow for randomization, but with the use of `CronRandomization` you can generate random
+schedules using the following format: `R(range_start-range_end)`, where `range_start` and `range_end` follow the same rules
+as for a regular cron range with the addition that only numbers are allowed. All the rules for a regular cron expression 
+still applies when using randomization, i.e. mutual exclusiveness and not extra spaces.
+
+## Examples
+|Expression | Meaning
+| --- | --- |
+| 0 0 R(13-20) * * ? | On the hour, on a random hour 13-20, inclusive.
+| 0 0 0 ? * R(0-6) | A random weekday, every week, at midnight.
+| 0 R(45-15) */12 ? * * | A random minute between 45-15, inclusive, every 12 hours.
+
+
+# Used Third party libraries
 
 Howard Hinnant's [date libraries](https://github.com/HowardHinnant/date/)
 

test/CronRandomizationTest.cpp

@@ -13,7 +13,7 @@ void test(const char* const random_schedule)
     libcron::CronRandomization cr;
     std::unordered_map<int, std::unordered_map<int, int>> results{};
 
-    for (int i = 0; i < 50000; ++i)
+    for (int i = 0; i < 5000; ++i)
     {
         auto res = cr.parse(random_schedule);
         REQUIRE(std::get<0>(res));
@@ -76,3 +76,30 @@ SCENARIO("Randomize all the things with reverse ranges - day of week")
         }
     }
 }
+
+SCENARIO("Test readme examples")
+{
+    GIVEN("0 0 R(13-20) * * ?")
+    {
+        THEN("Valid schedule generated")
+        {
+            test("0 0 R(13-20) * * ?");
+        }
+    }
+
+    GIVEN("0 0 0 ? * R(0-6)")
+    {
+        THEN("Valid schedule generated")
+        {
+            test("0 0 0 ? * R(0-6)");
+        }
+    }
+
+    GIVEN("0 R(45-15) */12 ? * *")
+    {
+        THEN("Valid schedule generated")
+        {
+            test("0 R(45-15) */12 ? * *");
+        }
+    }
+}