89 lines
2.0 KiB
Go
89 lines
2.0 KiB
Go
// Copyright 2015 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 expressions
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import . "github.com/pingcap/check"
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var _ = Suite(&testSubQuerySuite{})
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type testSubQuerySuite struct {
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}
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func (s *testSubQuerySuite) TestSubQuery(c *C) {
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e := &SubQuery{
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Value: 1,
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}
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c.Assert(e.IsStatic(), IsFalse)
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str := e.String()
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c.Assert(str, Equals, "")
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ec, err := e.Clone()
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c.Assert(err, IsNil)
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v, err := ec.Eval(nil, nil)
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c.Assert(err, IsNil)
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c.Assert(v, Equals, 1)
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e2, ok := ec.(*SubQuery)
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c.Assert(ok, IsTrue)
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e2 = newMockSubQuery([][]interface{}{{1}}, []string{"id"})
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vv, err := e2.Eval(nil, nil)
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c.Assert(err, IsNil)
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c.Assert(vv, Equals, 1)
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e2.Value = nil
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vv, err = e2.Eval(nil, nil)
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c.Assert(err, IsNil)
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c.Assert(vv, Equals, 1)
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e2 = newMockSubQuery([][]interface{}{{1, 2}}, []string{"id", "name"})
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vv, err = e2.Eval(nil, nil)
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c.Assert(err, IsNil)
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c.Assert(vv, DeepEquals, []interface{}{1, 2})
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e2 = newMockSubQuery([][]interface{}{{1}, {2}}, []string{"id"})
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_, err = e2.Eval(nil, nil)
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c.Assert(err, NotNil)
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str = e2.String()
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c.Assert(len(str), Greater, 0)
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e2 = newMockSubQuery([][]interface{}{{1, 2}}, []string{"id", "name"})
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count, err := e2.ColumnCount(nil)
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c.Assert(err, IsNil)
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c.Assert(count, Equals, 2)
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count, err = e2.ColumnCount(nil)
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c.Assert(err, IsNil)
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c.Assert(count, Equals, 2)
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}
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func newMockSubQuery(rows [][]interface{}, fields []string) *SubQuery {
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r := &mockRecordset{
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rows: rows,
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fields: fields,
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offset: len(fields),
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}
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ms := &mockStatement{rset: r}
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ms.plan = newMockPlan(ms.rset)
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return &SubQuery{Stmt: ms}
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}
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