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46 lines
1.6 KiB
46 lines
1.6 KiB
// Copyright 2018 PingCAP, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package cascades
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import (
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. "github.com/pingcap/check"
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"github.com/pingcap/tidb/expression"
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"github.com/pingcap/tidb/planner/memo"
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"github.com/pingcap/tidb/planner/property"
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)
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func (s *testCascadesSuite) TestGetEnforcerRules(c *C) {
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prop := &property.PhysicalProperty{}
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group := memo.NewGroupWithSchema(nil, expression.NewSchema())
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enforcers := GetEnforcerRules(group, prop)
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c.Assert(enforcers, IsNil)
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col := &expression.Column{}
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prop.Items = append(prop.Items, property.Item{Col: col})
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enforcers = GetEnforcerRules(group, prop)
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c.Assert(enforcers, NotNil)
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c.Assert(len(enforcers), Equals, 1)
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_, ok := enforcers[0].(*OrderEnforcer)
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c.Assert(ok, IsTrue)
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}
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func (s *testCascadesSuite) TestNewProperties(c *C) {
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prop := &property.PhysicalProperty{}
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col := &expression.Column{}
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group := memo.NewGroupWithSchema(nil, expression.NewSchema())
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prop.Items = append(prop.Items, property.Item{Col: col})
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enforcers := GetEnforcerRules(group, prop)
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orderEnforcer, _ := enforcers[0].(*OrderEnforcer)
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newProp := orderEnforcer.NewProperty(prop)
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c.Assert(newProp.Items, IsNil)
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}
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