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1 files changed, 34 insertions, 0 deletions

diff --git a/spec/active_relation/relations/projection_spec.rb b/spec/active_relation/relations/projection_spec.rb
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+++ b/spec/active_relation/relations/projection_spec.rb
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+require File.join(File.dirname(__FILE__), '..', '..', 'spec_helper')
+
+describe ActiveRelation::Relations::Projection do
+  before do
+    @relation1 = ActiveRelation::Relations::Table.new(:foo)
+    @relation2 = ActiveRelation::Relations::Table.new(:bar)
+    @attribute1 = @relation1[:id]
+    @attribute2 = @relation2[:id]
+  end
+  
+  describe '==' do
+    it "obtains if the relations and attributes are identical" do
+      ActiveRelation::Relations::Projection.new(@relation1, @attribute1, @attribute2).should == ActiveRelation::Relations::Projection.new(@relation1, @attribute1, @attribute2)
+      ActiveRelation::Relations::Projection.new(@relation1, @attribute1).should_not == ActiveRelation::Relations::Projection.new(@relation2, @attribute1)
+      ActiveRelation::Relations::Projection.new(@relation1, @attribute1).should_not == ActiveRelation::Relations::Projection.new(@relation1, @attribute2)
+    end
+  end
+  
+  describe '#qualify' do
+    it "distributes over teh relation and attributes" do
+      ActiveRelation::Relations::Projection.new(@relation1, @attribute1).qualify. \
+        should == ActiveRelation::Relations::Projection.new(@relation1.qualify, @attribute1.qualify)
+    end
+  end
+  
+  describe '#to_sql' do
+    it "manufactures sql with a limited select clause" do
+      ActiveRelation::Relations::Projection.new(@relation1, @attribute1).to_sql.should be_like("""
+        SELECT `foo`.`id`
+        FROM `foo`
+      """)
+    end
+  end
+end
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