67 lines
1.9 KiB
Go
67 lines
1.9 KiB
Go
// Copyright 2015 PingCAP, Inc.
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
package expression
|
|
|
|
import (
|
|
. "github.com/pingcap/check"
|
|
)
|
|
|
|
var _ = Suite(&testCaseSuite{})
|
|
|
|
type testCaseSuite struct {
|
|
}
|
|
|
|
func (s *testCaseSuite) TestCaseWhen(c *C) {
|
|
when0 := &WhenClause{mockExpr{val: 1}, mockExpr{val: "str1"}}
|
|
when1 := &WhenClause{mockExpr{val: 2}, mockExpr{val: "str2"}}
|
|
whens0 := []*WhenClause{when0, when1}
|
|
|
|
tbl := []struct {
|
|
value Expression
|
|
whens []*WhenClause
|
|
elseClause Expression
|
|
ret interface{}
|
|
}{
|
|
{mockExpr{val: 1}, whens0, nil, "str1"},
|
|
{mockExpr{val: 2}, whens0, nil, "str2"},
|
|
{mockExpr{val: 3}, whens0, nil, nil},
|
|
{mockExpr{val: 3}, whens0, mockExpr{val: "str3"}, "str3"},
|
|
}
|
|
|
|
for _, t := range tbl {
|
|
f := FunctionCase{t.value, t.whens, t.elseClause}
|
|
v, err := f.Eval(nil, nil)
|
|
c.Assert(err, IsNil)
|
|
c.Assert(v, DeepEquals, t.ret)
|
|
}
|
|
|
|
f := FunctionCase{mockExpr{val: 4}, whens0, mockExpr{val: "else"}}
|
|
cf := f.Clone()
|
|
c.Assert(cf, NotNil)
|
|
v, err := f.Eval(nil, nil)
|
|
c.Assert(err, IsNil)
|
|
cv, err := cf.Eval(nil, nil)
|
|
c.Assert(err, IsNil)
|
|
c.Assert(v, DeepEquals, cv)
|
|
c.Assert(f.IsStatic(), IsFalse)
|
|
|
|
str := f.String()
|
|
c.Assert(len(str), Greater, 0)
|
|
|
|
when2 := &WhenClause{mockExpr{val: 2, isStatic: true}, mockExpr{val: "str2", isStatic: true}}
|
|
whens1 := []*WhenClause{when2}
|
|
f = FunctionCase{mockExpr{val: 4, isStatic: true}, whens1, mockExpr{val: "else", isStatic: true}}
|
|
c.Assert(f.IsStatic(), IsTrue)
|
|
}
|