reorganizing tests

1 files changed, 78 insertions, 0 deletions

diff --git a/spec/arel/engines/sql/unit/relations/join_spec.rb b/spec/arel/engines/sql/unit/relations/join_spec.rb
new file mode 100644
index 0000000000..ea17f8106f
--- /dev/null
+++ b/spec/arel/engines/sql/unit/relations/join_spec.rb
@@ -0,0 +1,78 @@
+require File.join(File.dirname(__FILE__), '..', '..', '..', '..', '..', 'spec_helper')
+
+module Arel
+  describe Join do
+    before do
+      @relation1 = Table.new(:users)
+      @relation2 = Table.new(:photos)
+      @predicate = @relation1[:id].eq(@relation2[:user_id])
+    end
+
+    describe 'hashing' do
+      it 'implements hash equality' do
+        InnerJoin.new(@relation1, @relation2, @predicate) \
+          .should hash_the_same_as(InnerJoin.new(@relation1, @relation2, @predicate))
+      end
+    end
+
+    describe '#engine' do
+      it "delegates to a relation's engine" do
+        InnerJoin.new(@relation1, @relation2, @predicate).engine.should == @relation1.engine
+      end
+    end
+
+    describe '#attributes' do
+      it 'combines the attributes of the two relations' do
+        join = InnerJoin.new(@relation1, @relation2, @predicate)
+        join.attributes.should ==
+          (@relation1.attributes + @relation2.attributes).collect { |a| a.bind(join) }
+      end
+    end
+
+    describe '#to_sql' do
+      describe 'when joining with another relation' do
+        it 'manufactures sql joining the two tables on the predicate' do
+          sql = InnerJoin.new(@relation1, @relation2, @predicate).to_sql
+
+          adapter_is :mysql do
+            sql.should be_like(%Q{
+              SELECT `users`.`id`, `users`.`name`, `photos`.`id`, `photos`.`user_id`, `photos`.`camera_id`
+              FROM `users`
+                INNER JOIN `photos` ON `users`.`id` = `photos`.`user_id`
+            })
+          end
+
+          adapter_is_not :mysql do
+            sql.should be_like(%Q{
+              SELECT "users"."id", "users"."name", "photos"."id", "photos"."user_id", "photos"."camera_id"
+              FROM "users"
+                INNER JOIN "photos" ON "users"."id" = "photos"."user_id"
+            })
+          end
+        end
+      end
+
+      describe 'when joining with a string' do
+        it "passes the string through to the where clause" do
+          sql = StringJoin.new(@relation1, "INNER JOIN asdf ON fdsa").to_sql
+
+          adapter_is :mysql do
+            sql.should be_like(%Q{
+              SELECT `users`.`id`, `users`.`name`
+              FROM `users`
+                INNER JOIN asdf ON fdsa
+            })
+          end
+
+          adapter_is_not :mysql do
+            sql.should be_like(%Q{
+              SELECT "users"."id", "users"."name"
+              FROM "users"
+                INNER JOIN asdf ON fdsa
+            })
+          end
+        end
+      end
+    end
+  end
+end
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