1 files changed, 36 insertions, 0 deletions
diff --git a/spec/ruby/library/matrix/row_spec.rb b/spec/ruby/library/matrix/row_spec.rb
new file mode 100644
index 0000000000..8a7662fdf2
--- /dev/null
+++ b/spec/ruby/library/matrix/row_spec.rb
@@ -0,0 +1,36 @@
+require_relative '../../spec_helper'
+require 'matrix'
+
+describe "Matrix#row" do
+  before :all do
+    @m = Matrix[ [1, 2], [2, 3], [3, 4] ]
+  end
+
+  it "returns a Vector when called without a block" do
+    @m.row(0).should == Vector[1,2]
+  end
+
+  it "yields the elements of the row when called with a block" do
+    a = []
+    @m.row(0) {|x| a << x}
+    a.should == [1,2]
+  end
+
+  it "counts backwards for negative argument" do
+    @m.row(-1).should == Vector[3, 4]
+  end
+
+  it "returns self when called with a block" do
+    @m.row(0) { |x| x }.should.equal?(@m)
+  end
+
+  it "returns nil when out of bounds" do
+    @m.row(3).should == nil
+    @m.row(-4).should == nil
+  end
+
+  it "never yields when out of bounds" do
+    -> { @m.row(3){ raise } }.should_not.raise
+    -> { @m.row(-4){ raise } }.should_not.raise
+  end
+end