1 files changed, 33 insertions, 0 deletions
diff --git a/spec/ruby/core/io/readline_spec.rb b/spec/ruby/core/io/readline_spec.rb
index 7cb1601816..a814c1be90 100644
--- a/spec/ruby/core/io/readline_spec.rb
+++ b/spec/ruby/core/io/readline_spec.rb
@@ -43,9 +43,42 @@ describe "IO#readline" do
     end
   end
 
+  describe "when passed limit" do
+    it "reads limit bytes" do
+      @io.readline(3).should == "Voi"
+    end
+
+    it "returns an empty string when passed 0 as a limit" do
+      @io.readline(0).should == ""
+    end
+
+    it "does not accept Integers that don't fit in a C off_t" do
+      -> { @io.readline(2**128) }.should raise_error(RangeError)
+    end
+  end
+
+  describe "when passed separator and limit" do
+    it "reads limit bytes till the separator" do
+      # Voici la ligne une.\
+      @io.readline(" ", 4).should == "Voic"
+      @io.readline(" ", 4).should == "i "
+      @io.readline(" ", 4).should == "la "
+      @io.readline(" ", 4).should == "lign"
+      @io.readline(" ", 4).should == "e "
+    end
+  end
+
   describe "when passed chomp" do
     it "returns the first line without a trailing newline character" do
       @io.readline(chomp: true).should == IOSpecs.lines_without_newline_characters[0]
     end
+
+    it "raises exception when options passed as Hash" do
+      -> { @io.readline({ chomp: true }) }.should raise_error(TypeError)
+
+      -> {
+        @io.readline("\n", 1, { chomp: true })
+      }.should raise_error(ArgumentError, "wrong number of arguments (given 3, expected 0..2)")
+    end
   end
 end