1 files changed, 30 insertions, 0 deletions
diff --git a/spec/ruby/library/stringscanner/shared/concat.rb b/spec/ruby/library/stringscanner/shared/concat.rb
new file mode 100644
index 0000000000..28788d3ff1
--- /dev/null
+++ b/spec/ruby/library/stringscanner/shared/concat.rb
@@ -0,0 +1,30 @@
+describe :strscan_concat, shared: true do
+  it "concatenates the given argument to self and returns self" do
+    s = StringScanner.new("hello ")
+    s.send(@method, 'world').should == s
+    s.string.should == "hello world"
+    s.eos?.should be_false
+  end
+
+  it "raises a TypeError if the given argument can't be converted to a String" do
+    lambda { StringScanner.new('hello').send(@method, :world)    }.should raise_error(TypeError)
+    lambda { StringScanner.new('hello').send(@method, mock('x')) }.should raise_error(TypeError)
+  end
+end
+
+describe :strscan_concat_fixnum, shared: true do
+  it "raises a TypeError" do
+    a = StringScanner.new("hello world")
+    lambda { a.send(@method, 333) }.should raise_error(TypeError)
+    b = StringScanner.new("")
+    lambda { b.send(@method, (256 * 3 + 64)) }.should raise_error(TypeError)
+    lambda { b.send(@method, -200)           }.should raise_error(TypeError)
+  end
+
+  it "doesn't call to_int on the argument" do
+    x = mock('x')
+    x.should_not_receive(:to_int)
+
+    lambda { "".send(@method, x) }.should raise_error(TypeError)
+  end
+end