1 files changed, 46 insertions, 0 deletions
diff --git a/spec/ruby/core/fixnum/bit_and_spec.rb b/spec/ruby/core/fixnum/bit_and_spec.rb
new file mode 100644
index 0000000000..9586075039
--- /dev/null
+++ b/spec/ruby/core/fixnum/bit_and_spec.rb
@@ -0,0 +1,46 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+
+describe "Fixnum#&" do
+  it "returns self bitwise AND other" do
+    (256 & 16).should == 0
+    (2010 & 5).should == 0
+    (65535 & 1).should == 1
+    (0xffff & bignum_value + 0xffff_ffff).should == 65535
+  end
+
+  it "returns self bitwise AND other when one operand is negative" do
+    ((1 << 33) & -1).should == (1 << 33)
+    (-1 & (1 << 33)).should == (1 << 33)
+
+    ((-(1<<33)-1) & 5).should == 5
+    (5 & (-(1<<33)-1)).should == 5
+  end
+
+  it "returns self bitwise AND other when both operands are negative" do
+    (-5 & -1).should == -5
+    (-3 & -4).should == -4
+    (-12 & -13).should == -16
+    (-13 & -12).should == -16
+  end
+
+  it "returns self bitwise AND a Bignum" do
+    (-1 & 2**64).should == 18446744073709551616
+  end
+
+  it "coerces the rhs and calls #coerce" do
+    obj = mock("fixnum bit and")
+    obj.should_receive(:coerce).with(6).and_return([3, 6])
+    (6 & obj).should == 2
+  end
+
+  it "raises a TypeError when passed a Float" do
+    lambda { (3 & 3.4) }.should raise_error(TypeError)
+  end
+
+  it "raises a TypeError and does not call #to_int when defined on an object" do
+    obj = mock("fixnum bit and")
+    obj.should_not_receive(:to_int)
+
+    lambda { 3 & obj }.should raise_error(TypeError)
+  end
+end