1 files changed, 55 insertions, 0 deletions
diff --git a/spec/ruby/core/time/_dump_spec.rb b/spec/ruby/core/time/_dump_spec.rb
new file mode 100644
index 0000000000..21f0806327
--- /dev/null
+++ b/spec/ruby/core/time/_dump_spec.rb
@@ -0,0 +1,55 @@
+# encoding: binary
+require_relative '../../spec_helper'
+
+describe "Time#_dump" do
+  before :each do
+    @local = Time.at(946812800)
+    @t = Time.at(946812800)
+    @t = @t.gmtime
+    @s = @t.send(:_dump)
+  end
+
+  it "is a private method" do
+    Time.private_instance_methods(false).should.include?(:_dump)
+  end
+
+  # http://redmine.ruby-lang.org/issues/show/627
+  it "preserves the GMT flag" do
+    @t.should.gmt?
+    dump = @t.send(:_dump).unpack("VV").first
+    ((dump >> 30) & 0x1).should == 1
+
+    @local.should_not.gmt?
+    dump = @local.send(:_dump).unpack("VV").first
+    ((dump >> 30) & 0x1).should == 0
+  end
+
+  it "dumps a Time object to a bytestring" do
+    @s.should.instance_of?(String)
+    @s.should == [3222863947, 2235564032].pack("VV")
+  end
+
+  it "dumps an array with a date as first element" do
+    high =                1 << 31 |
+          (@t.gmt? ? 1 : 0) << 30 |
+           (@t.year - 1900) << 14 |
+              (@t.mon  - 1) << 10 |
+                     @t.mday << 5 |
+                          @t.hour
+
+    high.should == @s.unpack("VV").first
+  end
+
+  it "dumps an array with a time as second element" do
+    low =  @t.min  << 26 |
+           @t.sec  << 20 |
+           @t.usec
+    low.should == @s.unpack("VV").last
+  end
+
+  it "dumps like MRI's marshaled time format" do
+    t = Time.utc(2000, 1, 15, 20, 1, 1, 203).localtime
+
+    t.send(:_dump).should == "\364\001\031\200\313\000\020\004"
+  end
+end