github.com/insionng/yougam@v0.0.0-20170714101924-2bc18d833463/libraries/pingcap/tidb/terror/terror_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 terror
    15  
    16  import (
    17  	"strings"
    18  	"testing"
    19  
    20  	"github.com/insionng/yougam/libraries/juju/errors"
    21  	. "github.com/insionng/yougam/libraries/pingcap/check"
    22  	"github.com/insionng/yougam/libraries/pingcap/tidb/util/testleak"
    23  )
    24  
    25  func TestT(t *testing.T) {
    26  	TestingT(t)
    27  }
    28  
    29  var _ = Suite(&testTErrorSuite{})
    30  
    31  type testTErrorSuite struct {
    32  }
    33  
    34  func (s *testTErrorSuite) TestTError(c *C) {
    35  	defer testleak.AfterTest(c)()
    36  	c.Assert(ClassParser.String(), Not(Equals), "")
    37  	c.Assert(ClassOptimizer.String(), Not(Equals), "")
    38  	c.Assert(ClassKV.String(), Not(Equals), "")
    39  	c.Assert(ClassServer.String(), Not(Equals), "")
    40  
    41  	parserErr := ClassParser.New(ErrCode(1), "error 1")
    42  	c.Assert(parserErr.Error(), Not(Equals), "")
    43  	c.Assert(ClassParser.EqualClass(parserErr), IsTrue)
    44  	c.Assert(ClassParser.NotEqualClass(parserErr), IsFalse)
    45  
    46  	c.Assert(ClassOptimizer.EqualClass(parserErr), IsFalse)
    47  	optimizerErr := ClassOptimizer.New(ErrCode(2), "abc")
    48  	c.Assert(ClassOptimizer.EqualClass(errors.New("abc")), IsFalse)
    49  	c.Assert(ClassOptimizer.EqualClass(nil), IsFalse)
    50  	c.Assert(optimizerErr.Equal(optimizerErr.Gen("def")), IsTrue)
    51  	c.Assert(optimizerErr.Equal(nil), IsFalse)
    52  	c.Assert(optimizerErr.Equal(errors.New("abc")), IsFalse)
    53  }
    54  
    55  var predefinedErr = ClassExecutor.New(ErrCode(123), "predefiend error")
    56  
    57  func example() error {
    58  	err := call()
    59  	return errors.Trace(err)
    60  }
    61  
    62  func call() error {
    63  	return predefinedErr.Gen("error message:%s", "abc")
    64  }
    65  
    66  func (s *testTErrorSuite) TestTraceAndLocation(c *C) {
    67  	defer testleak.AfterTest(c)()
    68  	err := example()
    69  	stack := errors.ErrorStack(err)
    70  	lines := strings.Split(stack, "\n")
    71  	c.Assert(len(lines), Equals, 2)
    72  	for _, v := range lines {
    73  		c.Assert(strings.Contains(v, "terror_test.go"), IsTrue)
    74  	}
    75  }
    76  
    77  func (s *testTErrorSuite) TestErrorEqual(c *C) {
    78  	defer testleak.AfterTest(c)()
    79  	e1 := errors.New("test error")
    80  	c.Assert(e1, NotNil)
    81  
    82  	e2 := errors.Trace(e1)
    83  	c.Assert(e2, NotNil)
    84  
    85  	e3 := errors.Trace(e2)
    86  	c.Assert(e3, NotNil)
    87  
    88  	c.Assert(errors.Cause(e2), Equals, e1)
    89  	c.Assert(errors.Cause(e3), Equals, e1)
    90  	c.Assert(errors.Cause(e2), Equals, errors.Cause(e3))
    91  
    92  	e4 := errors.New("test error")
    93  	c.Assert(errors.Cause(e4), Not(Equals), e1)
    94  
    95  	e5 := errors.Errorf("test error")
    96  	c.Assert(errors.Cause(e5), Not(Equals), e1)
    97  
    98  	c.Assert(ErrorEqual(e1, e2), IsTrue)
    99  	c.Assert(ErrorEqual(e1, e3), IsTrue)
   100  	c.Assert(ErrorEqual(e1, e4), IsTrue)
   101  	c.Assert(ErrorEqual(e1, e5), IsTrue)
   102  
   103  	var e6 error
   104  
   105  	c.Assert(ErrorEqual(nil, nil), IsTrue)
   106  	c.Assert(ErrorNotEqual(e1, e6), IsTrue)
   107  	code1 := ErrCode(1)
   108  	code2 := ErrCode(2)
   109  	te1 := ClassParser.New(code1, "abc")
   110  	te2 := ClassParser.New(code1, "def")
   111  	te3 := ClassKV.New(code1, "abc")
   112  	te4 := ClassKV.New(code2, "abc")
   113  	c.Assert(ErrorEqual(te1, te2), IsTrue)
   114  	c.Assert(ErrorEqual(te1, te3), IsFalse)
   115  	c.Assert(ErrorEqual(te3, te4), IsFalse)
   116  }