1 files changed, 62 insertions, 0 deletions
diff --git a/spec/ruby/library/stringscanner/pos_spec.rb b/spec/ruby/library/stringscanner/pos_spec.rb
new file mode 100644
index 0000000000..bc3003ebdf
--- /dev/null
+++ b/spec/ruby/library/stringscanner/pos_spec.rb
@@ -0,0 +1,62 @@
+require_relative '../../spec_helper'
+require 'strscan'
+
+describe "StringScanner#pos" do
+  before :each do
+    @s = StringScanner.new("This is a test")
+  end
+
+  it "returns the position of the scan pointer" do
+    @s.pos.should == 0
+    @s.scan_until(/This is/)
+    @s.pos.should == 7
+    @s.get_byte
+    @s.pos.should == 8
+    @s.terminate
+    @s.pos.should == 14
+  end
+
+  it "returns 0 in the reset position" do
+    @s.reset
+    @s.pos.should == 0
+  end
+
+  it "returns the length of the string in the terminate position" do
+    @s.terminate
+    @s.pos.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 "StringScanner#pos=" do
+  before :each do
+    @s = StringScanner.new("This is a test")
+  end
+
+  it "modify the scan pointer" do
+    @s.pos = 5
+    @s.rest.should == "is a test"
+  end
+
+  it "positions from the end if the argument is negative" do
+    @s.pos = -2
+    @s.rest.should == "st"
+    @s.pos.should == 12
+  end
+
+  it "raises a RangeError if position too far backward" do
+    -> {
+      @s.pos = -20
+    }.should.raise(RangeError)
+  end
+
+  it "raises a RangeError when the passed argument is out of range" do
+    -> { @s.pos = 20 }.should.raise(RangeError)
+  end
+end