1 files changed, 39 insertions, 0 deletions
diff --git a/spec/ruby/library/date/shared/commercial.rb b/spec/ruby/library/date/shared/commercial.rb
new file mode 100644
index 0000000000..354a5d5cd0
--- /dev/null
+++ b/spec/ruby/library/date/shared/commercial.rb
@@ -0,0 +1,39 @@
+describe :date_commercial, shared: true do
+  it "creates a Date for Julian Day Number day 0 by default" do
+    d = Date.send(@method)
+    d.year.should == -4712
+    d.month.should == 1
+    d.day.should == 1
+  end
+
+  it "creates a Date for the monday in the year and week given" do
+    d = Date.send(@method, 2000, 1)
+    d.year.should == 2000
+    d.month.should == 1
+    d.day.should == 3
+    d.cwday.should == 1
+  end
+
+  it "creates a Date for the correct day given the year, week and day number" do
+    d = Date.send(@method, 2004, 1, 1)
+    d.year.should == 2003
+    d.month.should == 12
+    d.day.should == 29
+    d.cwday.should == 1
+    d.cweek.should == 1
+    d.cwyear.should == 2004
+  end
+
+  it "creates only Date objects for valid weeks" do
+    lambda { Date.send(@method, 2004, 53, 1) }.should_not raise_error(ArgumentError)
+    lambda { Date.send(@method, 2004, 53, 0) }.should raise_error(ArgumentError)
+    lambda { Date.send(@method, 2004, 53, 8) }.should raise_error(ArgumentError)
+    lambda { Date.send(@method, 2004, 54, 1) }.should raise_error(ArgumentError)
+    lambda { Date.send(@method, 2004,  0, 1) }.should raise_error(ArgumentError)
+
+    lambda { Date.send(@method, 2003, 52, 1) }.should_not raise_error(ArgumentError)
+    lambda { Date.send(@method, 2003, 53, 1) }.should raise_error(ArgumentError)
+    lambda { Date.send(@method, 2003, 52, 0) }.should raise_error(ArgumentError)
+    lambda { Date.send(@method, 2003, 52, 8) }.should raise_error(ArgumentError)
+  end
+end