Implement current state reporting for containers update agent

[stoyan-zoubev]

[#167] Implement current state reporting for containers update agent

Also added xxxToString functions next to the available ParseXXX functions for containers device mappings, port mappings, mount points.

Signed-off-by: Stoyan Zoubev Stoyan.Zoubev@bosch.io

[dimitar-dimitrow]

I suggest the tests in from_container_test.go to be re-written as table driven tests as it is preferred way for unit tests in Go and is heavily used in the container-management repo . Currently some sub-test names are conflicting and test are hard to read.

func TestHostConfigParametersLogDriverConfig1(t *testing.T) {
	testCases := map[string]struct {
		logConfig        ctrtypes.LogDriverConfiguration
		nonVerboseParams []*types.KeyValuePair
		verboseParams    []*types.KeyValuePair
	}{
		"test_host_config_params_log_driver_none_verbose_%v": {
			logConfig: ctrtypes.LogDriverConfiguration{Type: ctrtypes.LogConfigDriverNone},
			nonVerboseParams: []*types.KeyValuePair{
				{Key: keyLogDriver, Value: "none"},
			},
		},
		"test_host_config_params_log_driver_json_verbose_%v": {
			logConfig: ctrtypes.LogDriverConfiguration{Type: ctrtypes.LogConfigDriverJSONFile, MaxFiles: 6, MaxSize: "100K"},
			nonVerboseParams: []*types.KeyValuePair{
				{Key: keyLogMaxFiles, Value: "6"},
				{Key: keyLogMaxSize, Value: "100K"},
			},
			verboseParams: []*types.KeyValuePair{
				{Key: keyLogDriver, Value: "json-file"},
			},
		},
		"test_host_config_params_log_driver_json_path_set_verbose_%v": {
			logConfig: ctrtypes.LogDriverConfiguration{Type: ctrtypes.LogConfigDriverJSONFile, MaxFiles: 2, MaxSize: "100M", RootDir: "/tmp/logs"},
			nonVerboseParams: []*types.KeyValuePair{
				{Key: keyLogPath, Value: "/tmp/logs"},
			},
			verboseParams: []*types.KeyValuePair{
				{Key: keyLogDriver, Value: "json-file"},
				{Key: keyLogMaxFiles, Value: "2"},
				{Key: keyLogMaxSize, Value: "100M"},
			},
		},
	}
	for _, verbose := range []bool{true, false} {
		for testFormat, testCase := range testCases {
			t.Run(fmt.Sprintf(testFormat, verbose), func(t *testing.T) {
				hostConfig := &ctrtypes.HostConfig{LogConfig: &ctrtypes.LogConfiguration{DriverConfig: &testCase.logConfig}, Privileged: true}
				actualParams := hostConfigParameters(hostConfig, verbose)

				expectedParams := testCase.nonVerboseParams
				if verbose {
					expectedParams = append(expectedParams, testCase.verboseParams...)
				}

				testutil.AssertEqual(t, len(expectedParams)+1, len(actualParams)) // +1 for privileged
				for _, param := range expectedParams {                            // assertParameters func could be added
					assertParameter(t, actualParams, param.Key, param.Value, false)
				}

			})
		}
	}
}