5 files changed, 138 insertions, 0 deletions
diff --git a/spec/ruby/library/stringscanner/shared/bol.rb b/spec/ruby/library/stringscanner/shared/bol.rb
new file mode 100644
index 0000000000..ec5c2051b5
--- /dev/null
+++ b/spec/ruby/library/stringscanner/shared/bol.rb
@@ -0,0 +1,25 @@
+describe :strscan_bol, shared: true do
+  it "returns true if the scan pointer is at the beginning of the line, false otherwise" do
+    s = StringScanner.new("This is a test")
+    s.send(@method).should == true
+    s.scan(/This/)
+    s.send(@method).should == false
+    s.terminate
+    s.send(@method).should == false
+
+    s = StringScanner.new("hello\nworld")
+    s.bol?.should == true
+    s.scan(/\w+/)
+    s.bol?.should == false
+    s.scan(/\n/)
+    s.bol?.should == true
+    s.unscan
+    s.bol?.should == false
+  end
+
+  it "returns true if the scan pointer is at the end of the line of an empty string." do
+    s = StringScanner.new('')
+    s.terminate
+    s.send(@method).should == true
+  end
+end
diff --git a/spec/ruby/library/stringscanner/shared/concat.rb b/spec/ruby/library/stringscanner/shared/concat.rb
new file mode 100644
index 0000000000..8138b0f8dc
--- /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 == false
+  end
+
+  it "raises a TypeError if the given argument can't be converted to a String" do
+    -> { StringScanner.new('hello').send(@method, :world)    }.should.raise(TypeError)
+    -> { StringScanner.new('hello').send(@method, mock('x')) }.should.raise(TypeError)
+  end
+end
+
+describe :strscan_concat_fixnum, shared: true do
+  it "raises a TypeError" do
+    a = StringScanner.new("hello world")
+    -> { a.send(@method, 333) }.should.raise(TypeError)
+    b = StringScanner.new("")
+    -> { b.send(@method, (256 * 3 + 64)) }.should.raise(TypeError)
+    -> { b.send(@method, -200)           }.should.raise(TypeError)
+  end
+
+  it "doesn't call to_int on the argument" do
+    x = mock('x')
+    x.should_not_receive(:to_int)
+
+    -> { StringScanner.new("").send(@method, x) }.should.raise(TypeError)
+  end
+end
diff --git a/spec/ruby/library/stringscanner/shared/extract_range.rb b/spec/ruby/library/stringscanner/shared/extract_range.rb
new file mode 100644
index 0000000000..c64cc41fa7
--- /dev/null
+++ b/spec/ruby/library/stringscanner/shared/extract_range.rb
@@ -0,0 +1,11 @@
+describe :extract_range, shared: true do
+  it "returns an instance of String when passed a String subclass" do
+    cls = Class.new(String)
+    sub = cls.new("abc")
+
+    s = StringScanner.new(sub)
+    ch = s.send(@method)
+    ch.should_not.is_a?(cls)
+    ch.should.instance_of?(String)
+  end
+end
diff --git a/spec/ruby/library/stringscanner/shared/extract_range_matched.rb b/spec/ruby/library/stringscanner/shared/extract_range_matched.rb
new file mode 100644
index 0000000000..8a6349bec1
--- /dev/null
+++ b/spec/ruby/library/stringscanner/shared/extract_range_matched.rb
@@ -0,0 +1,13 @@
+describe :extract_range_matched, shared: true do
+  it "returns an instance of String when passed a String subclass" do
+    cls = Class.new(String)
+    sub = cls.new("abc")
+
+    s = StringScanner.new(sub)
+    s.scan(/\w{1}/)
+
+    ch = s.send(@method)
+    ch.should_not.is_a?(cls)
+    ch.should.instance_of?(String)
+  end
+end
diff --git a/spec/ruby/library/stringscanner/shared/pos.rb b/spec/ruby/library/stringscanner/shared/pos.rb
new file mode 100644
index 0000000000..91f80fdf08
--- /dev/null
+++ b/spec/ruby/library/stringscanner/shared/pos.rb
@@ -0,0 +1,59 @@
+describe :strscan_pos, shared: true do
+  before :each do
+    @s = StringScanner.new("This is a test")
+  end
+
+  it "returns the position of the scan pointer" do
+    @s.send(@method).should == 0
+    @s.scan_until(/This is/)
+    @s.send(@method).should == 7
+    @s.get_byte
+    @s.send(@method).should == 8
+    @s.terminate
+    @s.send(@method).should == 14
+  end
+
+  it "returns 0 in the reset position" do
+    @s.reset
+    @s.send(@method).should == 0
+  end
+
+  it "returns the length of the string in the terminate position" do
+    @s.terminate
+    @s.send(@method).should == @s.string.length
+  end
+
+  it "is not multi-byte character sensitive" do
+    s = StringScanner.new("abcädeföghi")
+
+    s.scan_until(/ö/)
+    s.pos.should == 10
+  end
+end
+
+describe :strscan_pos_set, shared: true do
+  before :each do
+    @s = StringScanner.new("This is a test")
+  end
+
+  it "modify the scan pointer" do
+    @s.send(@method, 5)
+    @s.rest.should == "is a test"
+  end
+
+  it "positions from the end if the argument is negative" do
+    @s.send(@method, -2)
+    @s.rest.should == "st"
+    @s.pos.should == 12
+  end
+
+  it "raises a RangeError if position too far backward" do
+    -> {
+      @s.send(@method, -20)
+    }.should.raise(RangeError)
+  end
+
+  it "raises a RangeError when the passed argument is out of range" do
+    -> { @s.send(@method, 20) }.should.raise(RangeError)
+  end
+end