1 files changed, 39 insertions, 0 deletions
diff --git a/spec/rubyspec/core/fixnum/coerce_spec.rb b/spec/rubyspec/core/fixnum/coerce_spec.rb
new file mode 100644
index 0000000000..3ca7cb2df4
--- /dev/null
+++ b/spec/rubyspec/core/fixnum/coerce_spec.rb
@@ -0,0 +1,39 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+
+describe "Fixnum#coerce when given a Fixnum" do
+  it "returns an array containing two Fixnums" do
+    1.coerce(2).should == [2, 1]
+    1.coerce(2).map { |i| i.class }.should == [Fixnum, Fixnum]
+  end
+end
+
+describe "Fixnum#coerce when given a String" do
+  it "raises an ArgumentError when trying to coerce with a non-number String" do
+    lambda { 1.coerce(":)") }.should raise_error(ArgumentError)
+  end
+
+  it "returns  an array containing two Floats" do
+    1.coerce("2").should == [2.0, 1.0]
+    1.coerce("-2").should == [-2.0, 1.0]
+  end
+end
+
+describe "Fixnum#coerce" do
+  it "raises a TypeError when trying to coerce with nil" do
+    lambda { 1.coerce(nil) }.should raise_error(TypeError)
+  end
+
+  it "tries to convert the given Object into a Float by using #to_f" do
+    (obj = mock('1.0')).should_receive(:to_f).and_return(1.0)
+    2.coerce(obj).should == [1.0, 2.0]
+
+    (obj = mock('0')).should_receive(:to_f).and_return('0')
+    lambda { 2.coerce(obj).should == [1.0, 2.0] }.should raise_error(TypeError)
+  end
+
+  it "raises a TypeError when given an Object that does not respond to #to_f" do
+    lambda { 1.coerce(mock('x'))  }.should raise_error(TypeError)
+    lambda { 1.coerce(1..4)       }.should raise_error(TypeError)
+    lambda { 1.coerce(:test)      }.should raise_error(TypeError)
+  end
+end