73 lines
1.9 KiB
Ruby
73 lines
1.9 KiB
Ruby
require 'cases/helper'
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require 'models/car'
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require 'active_support/core_ext/string/strip'
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if ActiveRecord::Base.connection.supports_explain?
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class ExplainTest < ActiveRecord::TestCase
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fixtures :cars
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def base
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ActiveRecord::Base
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end
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def connection
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base.connection
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end
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def test_relation_explain
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message = Car.where(:name => 'honda').explain
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assert_match(/^EXPLAIN for:/, message)
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end
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def test_collecting_queries_for_explain
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queries = ActiveRecord::Base.collecting_queries_for_explain do
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Car.where(:name => 'honda').to_a
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end
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sql, binds = queries[0]
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assert_match "SELECT", sql
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assert_match "honda", sql
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assert_equal [], binds
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end
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def test_exec_explain_with_no_binds
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sqls = %w(foo bar)
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binds = [[], []]
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queries = sqls.zip(binds)
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connection.stubs(:explain).returns('query plan foo', 'query plan bar')
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expected = sqls.map {|sql| "EXPLAIN for: #{sql}\nquery plan #{sql}"}.join("\n")
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assert_equal expected, base.exec_explain(queries)
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end
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def test_exec_explain_with_binds
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cols = [Object.new, Object.new]
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cols[0].expects(:name).returns('wadus')
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cols[1].expects(:name).returns('chaflan')
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sqls = %w(foo bar)
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binds = [[[cols[0], 1]], [[cols[1], 2]]]
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queries = sqls.zip(binds)
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connection.stubs(:explain).returns("query plan foo\n", "query plan bar\n")
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expected = <<-SQL.strip_heredoc
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EXPLAIN for: #{sqls[0]} [["wadus", 1]]
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query plan foo
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EXPLAIN for: #{sqls[1]} [["chaflan", 2]]
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query plan bar
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SQL
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assert_equal expected, base.exec_explain(queries)
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end
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def test_unsupported_connection_adapter
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connection.stubs(:supports_explain?).returns(false)
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base.logger.expects(:warn).never
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Car.where(:name => 'honda').to_a
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end
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end
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end
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