1 files changed, 35 insertions, 0 deletions
diff --git a/spec/ruby/library/matrix/column_spec.rb b/spec/ruby/library/matrix/column_spec.rb
new file mode 100644
index 0000000000..d5d8c80c1a
--- /dev/null
+++ b/spec/ruby/library/matrix/column_spec.rb
@@ -0,0 +1,35 @@
+require_relative '../../spec_helper'
+require 'matrix'
+
+describe "Matrix#column" do
+  before :all do
+    @m =  Matrix[[1,2,3], [2,3,4]]
+  end
+
+  it "returns a Vector when called without a block" do
+    @m.column(1).should == Vector[2,3]
+  end
+
+  it "yields each element in the column to the block" do
+    a = []
+    @m.column(1) {|n| a << n }
+    a.should == [2,3]
+  end
+
+  it "counts backwards for negative argument" do
+    @m.column(-1).should == Vector[3, 4]
+  end
+
+  it "returns self when called with a block" do
+    @m.column(0) { |x| x }.should.equal?(@m)
+  end
+
+  it "returns nil when out of bounds" do
+    @m.column(3).should == nil
+  end
+
+  it "never yields when out of bounds" do
+    -> { @m.column(3){ raise } }.should_not.raise
+    -> { @m.column(-4){ raise } }.should_not.raise
+  end
+end