Date before 3.1.3 does not have version, such as in CRuby 3.0.2

* CRuby 3.0.2 ships with Date 3.1.0
* CRuby 3.0.3 ships with Date 3.1.3

Author: eregon

spec/ruby/library/date/deconstruct_keys_spec.rb

@@ -1,7 +1,8 @@
 require_relative '../../spec_helper'
 require 'date'
+date_version = defined?(Date::VERSION) ? Date::VERSION : '3.1.0'
 
-version_is Date::VERSION, "3.3" do #ruby_version_is "3.2" do
+version_is date_version, "3.3" do #ruby_version_is "3.2" do
   describe "Date#deconstruct_keys" do
     it "returns whole hash for nil as an argument" do
       d = Date.new(2022, 10, 5)

spec/ruby/library/date/strftime_spec.rb

@@ -1,6 +1,7 @@
 require_relative "../../spec_helper"
 require 'date'
 require_relative '../../shared/time/strftime_for_date'
+date_version = defined?(Date::VERSION) ? Date::VERSION : '3.1.0'
 
 describe "Date#strftime" do
   before :all do
@@ -23,14 +24,14 @@
   end
 
   # %v is %e-%b-%Y for Date/DateTime
-  version_is Date::VERSION, ""..."3.2" do #ruby_version_is ""..."3.1" do
+  version_is date_version, ""..."3.2" do #ruby_version_is ""..."3.1" do
     it "should be able to show the commercial week" do
       @date.strftime("%v").should == " 9-Apr-2000"
       @date.strftime("%v").should == @date.strftime('%e-%b-%Y')
     end
   end
 
-  version_is Date::VERSION, "3.2" do #ruby_version_is "3.1" do
+  version_is date_version, "3.2" do #ruby_version_is "3.1" do
     it "should be able to show the commercial week" do
       @date.strftime("%v").should == " 9-APR-2000"
       @date.strftime("%v").should != @date.strftime('%e-%b-%Y')

spec/ruby/library/datetime/deconstruct_keys_spec.rb

@@ -1,7 +1,8 @@
 require_relative '../../spec_helper'
 require 'date'
+date_version = defined?(Date::VERSION) ? Date::VERSION : '3.1.0'
 
-version_is Date::VERSION, "3.3" do #ruby_version_is "3.2" do
+version_is date_version, "3.3" do #ruby_version_is "3.2" do
   describe "DateTime#deconstruct_keys" do
     it "returns whole hash for nil as an argument" do
       d = DateTime.new(2022, 10, 5, 13, 30)

spec/ruby/library/datetime/strftime_spec.rb

@@ -2,6 +2,7 @@
 require 'date'
 require_relative '../../shared/time/strftime_for_date'
 require_relative '../../shared/time/strftime_for_time'
+date_version = defined?(Date::VERSION) ? Date::VERSION : '3.1.0'
 
 describe "DateTime#strftime" do
   before :all do
@@ -33,14 +34,14 @@
   end
 
   # %v is %e-%b-%Y for Date/DateTime
-  version_is Date::VERSION, ""..."3.2" do #ruby_version_is ""..."3.1" do
+  version_is date_version, ""..."3.2" do #ruby_version_is ""..."3.1" do
     it "should be able to show the commercial week" do
       @time.strftime("%v").should == " 3-Feb-2001"
       @time.strftime("%v").should == @time.strftime('%e-%b-%Y')
     end
   end
 
-  version_is Date::VERSION, "3.2" do #ruby_version_is "3.1" do
+  version_is date_version, "3.2" do #ruby_version_is "3.1" do
     it "should be able to show the commercial week" do
       @time.strftime("%v").should == " 3-FEB-2001"
       @time.strftime("%v").should != @time.strftime('%e-%b-%Y')

spec/ruby/library/datetime/to_time_spec.rb

@@ -1,5 +1,6 @@
 require_relative '../../spec_helper'
 require 'date'
+date_version = defined?(Date::VERSION) ? Date::VERSION : '3.1.0'
 
 describe "DateTime#to_time" do
   it "yields a new Time object" do
@@ -18,7 +19,7 @@
     time.sec.should == 59
   end
 
-  version_is(Date::VERSION, '3.2.3') do #ruby_version_is "3.2" do
+  version_is date_version, '3.2.3' do #ruby_version_is "3.2" do
     it "returns a Time representing the same instant before Gregorian" do
       datetime = DateTime.civil(1582, 10, 4, 23, 58, 59)
       time = datetime.to_time.utc

spec/ruby/library/time/to_datetime_spec.rb

@@ -1,5 +1,7 @@
 require_relative '../../spec_helper'
 require 'time'
+require 'date'
+date_version = defined?(Date::VERSION) ? Date::VERSION : '3.1.0'
 
 describe "Time#to_datetime" do
   it "returns a DateTime representing the same instant" do
@@ -13,7 +15,7 @@
     datetime.sec.should == 59
   end
 
-  version_is(Date::VERSION, '3.2.3') do #ruby_version_is '3.2' do
+  version_is date_version, '3.2.3' do #ruby_version_is '3.2' do
     it "returns a DateTime representing the same instant before Gregorian" do
       time = Time.utc(1582, 10, 14, 23, 58, 59)
       datetime = time.to_datetime