1 files changed, 74 insertions, 0 deletions
diff --git a/spec/rubyspec/optional/capi/fixnum_spec.rb b/spec/rubyspec/optional/capi/fixnum_spec.rb
new file mode 100644
index 0000000000..87f257fec7
--- /dev/null
+++ b/spec/rubyspec/optional/capi/fixnum_spec.rb
@@ -0,0 +1,74 @@
+require File.expand_path('../spec_helper', __FILE__)
+
+load_extension("fixnum")
+
+describe "CApiFixnumSpecs" do
+  before :each do
+    @s = CApiFixnumSpecs.new
+  end
+
+  platform_is wordsize: 64 do
+    describe "rb_fix2uint" do
+      it "raises a TypeError if passed nil" do
+        lambda { @s.rb_fix2uint(nil) }.should raise_error(TypeError)
+      end
+
+      it "converts a Fixnum" do
+        @s.rb_fix2uint(1).should == 1
+      end
+
+      it "converts the maximum uint value" do
+        @s.rb_fix2uint(0xffff_ffff).should == 0xffff_ffff
+      end
+
+      it "converts a Float" do
+        @s.rb_fix2uint(25.4567).should == 25
+      end
+
+      it "raises a RangeError if the value is more than 32bits" do
+        lambda { @s.rb_fix2uint(0xffff_ffff+1) }.should raise_error(RangeError)
+      end
+
+      it "raises a RangeError if the value is more than 64bits" do
+        lambda { @s.rb_fix2uint(0xffff_ffff_ffff_ffff+1) }.should raise_error(RangeError)
+      end
+    end
+
+    describe "rb_fix2int" do
+      it "raises a TypeError if passed nil" do
+        lambda { @s.rb_fix2int(nil) }.should raise_error(TypeError)
+      end
+
+      it "converts a Fixnum" do
+        @s.rb_fix2int(-1).should == -1
+        @s.rb_fix2int(1).should == 1
+      end
+
+      it "converts the maximum uint value" do
+        @s.rb_fix2int(0x7fff_ffff).should == 0x7fff_ffff
+      end
+
+      it "converts a Float" do
+        @s.rb_fix2int(25.4567).should == 25
+      end
+
+      it "converts a negative Bignum into an signed number" do
+        @s.rb_fix2int(-2147442171).should == -2147442171
+      end
+
+      it "raises a RangeError if the value is more than 32bits" do
+        lambda { @s.rb_fix2int(0xffff_ffff+1) }.should raise_error(RangeError)
+      end
+
+      it "raises a RangeError if the value is more than 64bits" do
+        lambda { @s.rb_fix2int(0xffff_ffff_ffff_ffff+1) }.should raise_error(RangeError)
+      end
+
+      it "calls #to_int to coerce the value" do
+        obj = mock("number")
+        obj.should_receive(:to_int).and_return(2)
+        @s.rb_fix2int(obj).should == 2
+      end
+    end
+  end
+end