70 lines
2.4 KiB
Go
70 lines
2.4 KiB
Go
// Copyright 2016 DigitalOcean
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package collectors
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import "github.com/ceph/go-ceph/rados"
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// Conn interface implements only necessary methods that are used
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// in this repository of *rados.Conn. This keeps rest of the implementation
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// clean and *rados.Conn doesn't need to show up everywhere (it being
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// more of an implementation detail in reality). Also it makes mocking
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// easier for unit-testing the collectors.
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type Conn interface {
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ReadDefaultConfigFile() error
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Connect() error
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Shutdown()
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MonCommand([]byte) ([]byte, string, error)
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}
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// Verify that *rados.Conn implements Conn correctly.
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var _ Conn = &rados.Conn{}
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// NoopConn is the stub we use for mocking rados Conn. Unit testing
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// each individual collectors becomes a lot easier after that.
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type NoopConn struct {
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output string
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}
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// The stub we use for testing should also satisfy the interface properties.
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var _ Conn = &NoopConn{}
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// NewNoopConn returns an instance of *NoopConn. The string that we want
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// outputted at the end of the command we issue to ceph, should be
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// specified in the only input parameter.
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func NewNoopConn(output string) *NoopConn {
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return &NoopConn{output}
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}
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// ReadDefaultConfigFile does not need to return an error. It satisfies
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// rados.Conn's function with the same prototype.
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func (n *NoopConn) ReadDefaultConfigFile() error {
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return nil
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}
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// Connect does not need to return an error. It satisfies
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// rados.Conn's function with the same prototype.
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func (n *NoopConn) Connect() error {
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return nil
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}
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// Shutdown satisfies rados.Conn's function prototype.
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func (n *NoopConn) Shutdown() {}
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// MonCommand returns the provided output string to NoopConn as is, making
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// it seem like it actually ran something and produced that string as a result.
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func (n *NoopConn) MonCommand(_ []byte) ([]byte, string, error) {
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return []byte(n.output), "", nil
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}
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