1 files changed, 27 insertions, 0 deletions
diff --git a/spec/engines/memory/unit/relations/project_spec.rb b/spec/engines/memory/unit/relations/project_spec.rb
new file mode 100644
index 0000000000..92ed9fa74b
--- /dev/null
+++ b/spec/engines/memory/unit/relations/project_spec.rb
@@ -0,0 +1,27 @@
+require 'spec_helper'
+
+module Arel
+  describe Project do
+    before do
+      @relation = Array.new([
+        [1, 'duck' ],
+        [2, 'duck' ],
+        [3, 'goose']
+      ], [[:id, Attributes::Integer], [:name, Attributes::String]])
+    end
+
+    describe '#call' do
+      it 'retains only the attributes that are provided' do
+        @relation                   \
+          .project(@relation[:id])  \
+        .let do |relation|
+          relation.call.should == [
+            Row.new(relation, [1]),
+            Row.new(relation, [2]),
+            Row.new(relation, [3])
+          ]
+        end
+      end
+    end
+  end
+end