github.com/axw/juju@v0.0.0-20161005053422-4bd6544d08d4/cmd/modelcmd/apiopener_test.go (about)

     1  // Copyright 2015 Canonical Ltd.
     2  // Licensed under the AGPLv3, see LICENCE file for details.
     3  
     4  package modelcmd_test
     5  
     6  import (
     7  	"time"
     8  
     9  	"github.com/juju/errors"
    10  	jc "github.com/juju/testing/checkers"
    11  	"github.com/juju/utils/clock"
    12  	gc "gopkg.in/check.v1"
    13  
    14  	"github.com/juju/juju/api"
    15  	"github.com/juju/juju/cmd/modelcmd"
    16  	"github.com/juju/juju/jujuclient"
    17  )
    18  
    19  type APIOpenerSuite struct {
    20  	// Don't need any base suites
    21  }
    22  
    23  var _ = gc.Suite(&APIOpenerSuite{})
    24  
    25  func (*APIOpenerSuite) TestPassthrough(c *gc.C) {
    26  	var controllerName, modelName string
    27  	open := func(_ jujuclient.ClientStore, controllerNameArg, modelNameArg string) (api.Connection, error) {
    28  		controllerName = controllerNameArg
    29  		modelName = modelNameArg
    30  		// Lets do the bad thing and return both a connection instance
    31  		// and an error to check they both come through.
    32  		return &mockConnection{}, errors.New("boom")
    33  	}
    34  	opener := modelcmd.OpenFunc(open)
    35  	conn, err := opener.Open(nil, "a-name", "b-name")
    36  	c.Assert(err, gc.ErrorMatches, "boom")
    37  	c.Assert(conn, gc.NotNil)
    38  	c.Assert(controllerName, gc.Equals, "a-name")
    39  	c.Assert(modelName, gc.Equals, "b-name")
    40  }
    41  
    42  func (*APIOpenerSuite) TestTimoutSuccess(c *gc.C) {
    43  	var controllerName, modelName string
    44  	open := func(_ jujuclient.ClientStore, controllerNameArg, modelNameArg string) (api.Connection, error) {
    45  		controllerName = controllerNameArg
    46  		modelName = modelNameArg
    47  		return &mockConnection{}, nil
    48  	}
    49  	opener := modelcmd.NewTimeoutOpener(modelcmd.OpenFunc(open), clock.WallClock, 10*time.Second)
    50  	conn, err := opener.Open(nil, "a-name", "b-name")
    51  	c.Assert(err, jc.ErrorIsNil)
    52  	c.Assert(conn, gc.NotNil)
    53  	c.Assert(controllerName, gc.Equals, "a-name")
    54  	c.Assert(modelName, gc.Equals, "b-name")
    55  }
    56  
    57  func (*APIOpenerSuite) TestTimoutErrors(c *gc.C) {
    58  	var controllerName, modelName string
    59  	open := func(_ jujuclient.ClientStore, controllerNameArg, modelNameArg string) (api.Connection, error) {
    60  		controllerName = controllerNameArg
    61  		modelName = modelNameArg
    62  		return nil, errors.New("boom")
    63  	}
    64  	opener := modelcmd.NewTimeoutOpener(modelcmd.OpenFunc(open), clock.WallClock, 10*time.Second)
    65  	conn, err := opener.Open(nil, "a-name", "b-name")
    66  	c.Assert(err, gc.ErrorMatches, "boom")
    67  	c.Assert(conn, gc.IsNil)
    68  	c.Assert(controllerName, gc.Equals, "a-name")
    69  	c.Assert(modelName, gc.Equals, "b-name")
    70  }
    71  
    72  func (*APIOpenerSuite) TestTimoutClosesAPIOnTimeout(c *gc.C) {
    73  	var controllerName, modelName string
    74  	finished := make(chan struct{})
    75  	mockConn := &mockConnection{closed: make(chan struct{})}
    76  	open := func(_ jujuclient.ClientStore, controllerNameArg, modelNameArg string) (api.Connection, error) {
    77  		<-finished
    78  		controllerName = controllerNameArg
    79  		modelName = modelNameArg
    80  		return mockConn, nil
    81  	}
    82  	// have the mock clock only wait a microsecond
    83  	clock := &mockClock{wait: time.Microsecond}
    84  	// but tell it to wait five seconds
    85  	opener := modelcmd.NewTimeoutOpener(modelcmd.OpenFunc(open), clock, 5*time.Second)
    86  	conn, err := opener.Open(nil, "a-name", "b-name")
    87  	c.Assert(errors.Cause(err), gc.Equals, modelcmd.ErrConnTimedOut)
    88  	c.Assert(conn, gc.IsNil)
    89  	// check it was told to wait for 5 seconds
    90  	c.Assert(clock.duration, gc.Equals, 5*time.Second)
    91  	// tell the open func to continue now we have timed out
    92  	close(finished)
    93  	// wait until the connection has been closed
    94  	select {
    95  	case <-mockConn.closed:
    96  		// continue
    97  	case <-time.After(5 * time.Second):
    98  		c.Error("API connection was not closed.")
    99  	}
   100  	c.Assert(controllerName, gc.Equals, "a-name")
   101  	c.Assert(modelName, gc.Equals, "b-name")
   102  }
   103  
   104  // mockConnection will panic if anything but close is called.
   105  type mockConnection struct {
   106  	api.Connection
   107  
   108  	closed chan struct{}
   109  }
   110  
   111  func (m *mockConnection) Close() error {
   112  	close(m.closed)
   113  	return nil
   114  }
   115  
   116  // mockClock will panic if anything but After is called
   117  type mockClock struct {
   118  	clock.Clock
   119  
   120  	wait     time.Duration
   121  	duration time.Duration
   122  }
   123  
   124  func (m *mockClock) After(duration time.Duration) <-chan time.Time {
   125  	m.duration = duration
   126  	return time.After(m.wait)
   127  }