github.com/adnan-c/fabric_e2e_couchdb@v0.6.1-preview.0.20170228180935-21ce6b23cf91/gossip/state/metastate_test.go (about)

     1  /*
     2  Copyright IBM Corp. 2016 All Rights Reserved.
     3  
     4  Licensed under the Apache License, Version 2.0 (the "License");
     5  you may not use this file except in compliance with the License.
     6  You may obtain a copy of the License at
     7  
     8  		 http://www.apache.org/licenses/LICENSE-2.0
     9  
    10  Unless required by applicable law or agreed to in writing, software
    11  distributed under the License is distributed on an "AS IS" BASIS,
    12  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  See the License for the specific language governing permissions and
    14  limitations under the License.
    15  */
    16  
    17  package state
    18  
    19  import (
    20  	"testing"
    21  
    22  	"github.com/docker/docker/pkg/testutil/assert"
    23  )
    24  
    25  func TestNewNodeMetastate(t *testing.T) {
    26  	metastate := NewNodeMetastate(0)
    27  	assert.Equal(t, metastate.Height(), uint64(0))
    28  }
    29  
    30  func TestNodeMetastateImpl_Update(t *testing.T) {
    31  	metastate := NewNodeMetastate(0)
    32  	assert.Equal(t, metastate.Height(), uint64(0))
    33  	metastate.Update(10)
    34  	assert.Equal(t, metastate.Height(), uint64(10))
    35  }
    36  
    37  // Test node metastate encoding
    38  func TestNodeMetastateImpl_Bytes(t *testing.T) {
    39  	metastate := NewNodeMetastate(0)
    40  	// Encode state into bytes and check there is no errors
    41  	_, err := metastate.Bytes()
    42  	assert.NilError(t, err)
    43  }
    44  
    45  // Check the deserialization of the meta stats structure
    46  func TestNodeMetastate_FromBytes(t *testing.T) {
    47  	metastate := NewNodeMetastate(0)
    48  	// Serialize into bytes array
    49  	bytes, err := metastate.Bytes()
    50  	assert.NilError(t, err)
    51  	if bytes == nil {
    52  		t.Fatal("Was not able to serialize meta state into byte array.")
    53  	}
    54  
    55  	// Deserialize back and check, that state still have same
    56  	// height value
    57  	state, err := FromBytes(bytes)
    58  	assert.NilError(t, err)
    59  
    60  	assert.Equal(t, state.Height(), uint64(0))
    61  
    62  	// Update state to the new height and serialize it again
    63  	state.Update(17)
    64  	bytes, err = state.Bytes()
    65  	assert.NilError(t, err)
    66  	if bytes == nil {
    67  		t.Fatal("Was not able to serialize meta state into byte array.")
    68  	}
    69  
    70  	// Restore state from byte array and validate
    71  	// that stored height is still the same
    72  	updatedState, err := FromBytes(bytes)
    73  	assert.NilError(t, err)
    74  	assert.Equal(t, updatedState.Height(), uint64(17))
    75  }