Random.raw_seed was renamed to Random.urandom

See ruby/ruby@abae70d

core/random/raw_seed_spec.rb

@@ -1,28 +1,9 @@
 # -*- encoding: binary -*-
 require File.expand_path('../../../spec_helper', __FILE__)
+require File.expand_path('../shared/urandom', __FILE__)
 
-ruby_version_is "2.3" do
-  describe "Random.raw_seed" do
-    it "returns a String" do
-      Random.raw_seed(1).should be_an_instance_of(String)
-    end
-
-    it "returns a String of the length given as argument" do
-      Random.raw_seed(15).length.should == 15
-    end
-
-    it "raises an ArgumentError on a negative size" do
-      lambda {
-        Random.raw_seed(-1)
-      }.should raise_error(ArgumentError)
-    end
-
-    it "returns an ASCII-8BIT String" do
-      Random.raw_seed(15).encoding.should == Encoding::ASCII_8BIT
-    end
-
-    it "returns a random binary String" do
-      Random.raw_seed(12).should_not == Random.raw_seed(12)
-    end
+ruby_version_is "2.5" do
+  describe "Random.urandom" do
+    it_behaves_like :random_urandom, :urandom
   end
 end

core/random/shared/urandom.rb

@@ -0,0 +1,23 @@
+describe :random_urandom, shared: true do
+  it "returns a String" do
+    Random.send(@method, 1).should be_an_instance_of(String)
+  end
+
+  it "returns a String of the length given as argument" do
+    Random.send(@method, 15).length.should == 15
+  end
+
+  it "raises an ArgumentError on a negative size" do
+    lambda {
+      Random.send(@method, -1)
+    }.should raise_error(ArgumentError)
+  end
+
+  it "returns an ASCII-8BIT String" do
+    Random.send(@method, 15).encoding.should == Encoding::ASCII_8BIT
+  end
+
+  it "returns a random binary String" do
+    Random.send(@method, 12).should_not == Random.send(@method, 12)
+  end
+end

core/random/urandom_spec.rb

@@ -0,0 +1,9 @@
+# -*- encoding: binary -*-
+require File.expand_path('../../../spec_helper', __FILE__)
+require File.expand_path('../shared/urandom', __FILE__)
+
+ruby_version_is "2.3"..."2.5" do
+  describe "Random.raw_seed" do
+    it_behaves_like :random_urandom, :raw_seed
+  end
+end