Update the shard.yml to be unopinionated about crystal version, and adjusted the default UUID creation slightly to provide a random identifier if none is given.

Author: wyhaines

README.md

@@ -48,6 +48,8 @@ uuid = CSUUID.new
 
 uuid = CSUUID.new(seconds: 9223372036, nanoseconds: 729262400)
 
+uuid = CSUUID.new(identifier: Random.new.random_bytes(6))
+
 dt = ParseDate.parse("2020/07/29 09:15:37")
 uuid = CSUUID.new(dt)
 ```

shard.yml

@@ -1,10 +1,10 @@
 name: csuuid
-version: 0.1.1
+version: 0.1.2
 
 authors:
   - Kirk Haines <[email protected]>
 
-crystal: 1.0.0
+crystal: "*"
 
 license: MIT
 

spec/csuuid_spec.cr

@@ -45,6 +45,25 @@ describe CSUUID do
     uuid.to_s.should match /-79f659ccb685/
   end
 
+  it "generates a UUID with a random identifier" do
+    random_bytes = Random.new.random_bytes(6)
+    uuid = CSUUID.new(identifier: random_bytes)
+    uuid.to_s.should match /-#{random_bytes.hexstring}/
+  end
+
+  it "generates a UUID with the current time, but a random identifier, if initialized with no input" do
+    uuid1 = CSUUID.new
+    sleep 1.1
+    uuid2 = CSUUID.new
+
+    match_1 = CHECKUUID.match(uuid1.to_s)
+    match_1.should_not be_nil
+    match_2 = CHECKUUID.match(uuid2.to_s)
+    match_2.should_not be_nil
+    match_1.to_s.should_not eq match_2.to_s
+    (!match_1.nil?) && (!match_2.nil?) && match_1[5].should_not eq match_2[5]
+  end
+
   it "accurately returns the seconds and nanoseconds encoded within the UUID" do
     uuid = CSUUID.new(seconds: 9223372036, nanoseconds: 729262400)
     uuid.seconds_and_nanoseconds.should eq({9223372036, 729262400})

src/csuuid.cr

@@ -74,6 +74,7 @@ struct CSUUID
   end
 
   def initialize(identifier : Slice(UInt8) | String | Nil = nil)
+    identifier ||= @@prng.random_bytes(6)
     t = Time.local
     initialize_impl(t.internal_seconds, t.internal_nanoseconds, identifier)
   end