diff options
Diffstat (limited to 'spec/arel/engines/sql/unit/relations/project_spec.rb')
-rw-r--r-- | spec/arel/engines/sql/unit/relations/project_spec.rb | 110 |
1 files changed, 110 insertions, 0 deletions
diff --git a/spec/arel/engines/sql/unit/relations/project_spec.rb b/spec/arel/engines/sql/unit/relations/project_spec.rb new file mode 100644 index 0000000000..5e29124cfa --- /dev/null +++ b/spec/arel/engines/sql/unit/relations/project_spec.rb @@ -0,0 +1,110 @@ +require File.join(File.dirname(__FILE__), '..', '..', '..', '..', '..', 'spec_helper') + +module Arel + describe Project do + before do + @relation = Table.new(:users) + @attribute = @relation[:id] + end + + describe '#to_sql' do + describe 'when given an attribute' do + it "manufactures sql with a limited select clause" do + sql = Project.new(@relation, @attribute).to_sql + + adapter_is :mysql do + sql.should be_like(%Q{ + SELECT `users`.`id` + FROM `users` + }) + end + + adapter_is_not :mysql do + sql.should be_like(%Q{ + SELECT "users"."id" + FROM "users" + }) + end + end + end + + describe 'when given a relation' do + before do + @scalar_relation = Project.new(@relation, @relation[:name]) + end + + it "manufactures sql with scalar selects" do + sql = Project.new(@relation, @scalar_relation).to_sql + + adapter_is :mysql do + sql.should be_like(%Q{ + SELECT (SELECT `users`.`name` FROM `users`) AS `users` FROM `users` + }) + end + + adapter_is_not :mysql do + sql.should be_like(%Q{ + SELECT (SELECT "users"."name" FROM "users") AS "users" FROM "users" + }) + end + end + end + + describe 'when given a string' do + it "passes the string through to the select clause" do + sql = Project.new(@relation, 'asdf').to_sql + + adapter_is :mysql do + sql.should be_like(%Q{ + SELECT asdf FROM `users` + }) + end + + adapter_is_not :mysql do + sql.should be_like(%Q{ + SELECT asdf FROM "users" + }) + end + end + end + + describe 'when given an expression' do + it 'manufactures sql with expressions' do + sql = @relation.project(@attribute.count).to_sql + + adapter_is :mysql do + sql.should be_like(%Q{ + SELECT COUNT(`users`.`id`) AS count_id + FROM `users` + }) + end + + adapter_is_not :mysql do + sql.should be_like(%Q{ + SELECT COUNT("users"."id") AS count_id + FROM "users" + }) + end + end + + it 'manufactures sql with distinct expressions' do + sql = @relation.project(@attribute.count(true)).to_sql + + adapter_is :mysql do + sql.should be_like(%Q{ + SELECT COUNT(DISTINCT `users`.`id`) AS count_id + FROM `users` + }) + end + + adapter_is_not :mysql do + sql.should be_like(%Q{ + SELECT COUNT(DISTINCT "users"."id") AS count_id + FROM "users" + }) + end + end + end + end + end +end |