github.com/insionng/yougam@v0.0.0-20170714101924-2bc18d833463/libraries/pingcap/tidb/evaluator/builtin_control_test.go (about)

     1  // Copyright 2015 PingCAP, Inc.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // See the License for the specific language governing permissions and
    12  // limitations under the License.
    13  
    14  package evaluator
    15  
    16  import (
    17  	"errors"
    18  
    19  	. "github.com/insionng/yougam/libraries/pingcap/check"
    20  
    21  	"github.com/insionng/yougam/libraries/pingcap/tidb/util/testleak"
    22  	"github.com/insionng/yougam/libraries/pingcap/tidb/util/testutil"
    23  	"github.com/insionng/yougam/libraries/pingcap/tidb/util/types"
    24  )
    25  
    26  func (s *testEvaluatorSuite) TestIf(c *C) {
    27  	defer testleak.AfterTest(c)()
    28  	tbl := []struct {
    29  		Arg1 interface{}
    30  		Arg2 interface{}
    31  		Arg3 interface{}
    32  		Ret  interface{}
    33  	}{
    34  		{1, 1, 2, 1},
    35  		{nil, 1, 2, 2},
    36  		{0, 1, 2, 2},
    37  	}
    38  
    39  	for _, t := range tbl {
    40  		d, err := builtinIf(types.MakeDatums([]interface{}{t.Arg1, t.Arg2, t.Arg3}...), nil)
    41  		c.Assert(err, IsNil)
    42  		c.Assert(d, testutil.DatumEquals, types.NewDatum(t.Ret))
    43  	}
    44  
    45  	_, err := builtinIf(types.MakeDatums([]interface{}{errors.New("must error"), 1, 2}...), nil)
    46  	c.Assert(err, NotNil)
    47  }
    48  
    49  func (s *testEvaluatorSuite) TestIfNull(c *C) {
    50  	defer testleak.AfterTest(c)()
    51  	tbl := []struct {
    52  		Arg1 interface{}
    53  		Arg2 interface{}
    54  		Ret  interface{}
    55  	}{
    56  		{1, 2, 1},
    57  		{nil, 2, 2},
    58  		{nil, nil, nil},
    59  	}
    60  
    61  	for _, t := range tbl {
    62  		d, err := builtinIfNull(types.MakeDatums([]interface{}{t.Arg1, t.Arg2}...), nil)
    63  		c.Assert(err, IsNil)
    64  		c.Assert(d, testutil.DatumEquals, types.NewDatum(t.Ret))
    65  	}
    66  }
    67  
    68  func (s *testEvaluatorSuite) TestNullIf(c *C) {
    69  	defer testleak.AfterTest(c)()
    70  	tbl := []struct {
    71  		Arg1 interface{}
    72  		Arg2 interface{}
    73  		Ret  interface{}
    74  	}{
    75  		{1, 1, nil},
    76  		{nil, 2, nil},
    77  		{1, nil, 1},
    78  		{1, 2, 1},
    79  	}
    80  
    81  	for _, t := range tbl {
    82  		d, err := builtinNullIf(types.MakeDatums([]interface{}{t.Arg1, t.Arg2}...), nil)
    83  		c.Assert(err, IsNil)
    84  		c.Assert(d, testutil.DatumEquals, types.NewDatum(t.Ret))
    85  	}
    86  }