github.com/makyo/juju@v0.0.0-20160425123129-2608902037e9/cmd/jujud/agent/agentconf_test.go (about)

     1  // Copyright 2014 Canonical Ltd.
     2  // Licensed under the AGPLv3, see LICENCE file for details.
     3  
     4  package agent
     5  
     6  import (
     7  	"github.com/juju/errors"
     8  	jc "github.com/juju/testing/checkers"
     9  	gc "gopkg.in/check.v1"
    10  
    11  	"github.com/juju/juju/agent"
    12  	coretesting "github.com/juju/juju/testing"
    13  )
    14  
    15  var _ = gc.Suite(&agentConfSuite{})
    16  
    17  type agentConfSuite struct {
    18  	coretesting.BaseSuite
    19  }
    20  
    21  func (s *agentConfSuite) TestChangeConfigSuccess(c *gc.C) {
    22  	mcsw := &mockConfigSetterWriter{}
    23  
    24  	conf := agentConf{
    25  		dataDir: c.MkDir(),
    26  		_config: mcsw,
    27  	}
    28  
    29  	err := conf.ChangeConfig(func(agent.ConfigSetter) error {
    30  		return nil
    31  	})
    32  
    33  	c.Assert(err, jc.ErrorIsNil)
    34  	c.Assert(mcsw.WriteCalled, jc.IsTrue)
    35  }
    36  
    37  func (s *agentConfSuite) TestChangeConfigMutateFailure(c *gc.C) {
    38  	mcsw := &mockConfigSetterWriter{}
    39  
    40  	conf := agentConf{
    41  		dataDir: c.MkDir(),
    42  		_config: mcsw,
    43  	}
    44  
    45  	err := conf.ChangeConfig(func(agent.ConfigSetter) error {
    46  		return errors.New("blam")
    47  	})
    48  
    49  	c.Assert(err, gc.ErrorMatches, "blam")
    50  	c.Assert(mcsw.WriteCalled, jc.IsFalse)
    51  }
    52  
    53  func (s *agentConfSuite) TestChangeConfigWriteFailure(c *gc.C) {
    54  	mcsw := &mockConfigSetterWriter{
    55  		WriteError: errors.New("boom"),
    56  	}
    57  
    58  	conf := agentConf{
    59  		dataDir: c.MkDir(),
    60  		_config: mcsw,
    61  	}
    62  
    63  	err := conf.ChangeConfig(func(agent.ConfigSetter) error {
    64  		return nil
    65  	})
    66  
    67  	c.Assert(err, gc.ErrorMatches, "cannot write agent configuration: boom")
    68  	c.Assert(mcsw.WriteCalled, jc.IsTrue)
    69  }
    70  
    71  type mockConfigSetterWriter struct {
    72  	agent.ConfigSetterWriter
    73  	WriteError  error
    74  	WriteCalled bool
    75  }
    76  
    77  func (c *mockConfigSetterWriter) Write() error {
    78  	c.WriteCalled = true
    79  	return c.WriteError
    80  }