istio

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// Copyright Istio Authors
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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 cmd
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import (
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	"bytes"
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	"regexp"
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	"testing"
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)
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// nolint: lll
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var expectedOutput = `The following options can be passed to any command:
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      --log_as_json: Whether to format output as JSON or in plain console-friendly format
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      --log_caller: Comma-separated list of scopes for which to include caller information, scopes can be any of \[.*\]
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      --log_output_level: Comma-separated minimum per-scope logging level of messages to output, in the form of <scope>:<level>,<scope>:<level>,... where scope can be one of \[.*\] and level can be one of \[.*\]
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      --log_stacktrace_level: Comma-separated minimum per-scope logging level at which stack traces are captured, in the form of <scope>:<level>,<scope:level>,... where scope can be one of \[.*\] and level can be one of \[.*\]
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      --log_target: The set of paths where to output the log. This can be any path as well as the special values stdout and stderr
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`
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func TestLogHelp(t *testing.T) {
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	var out bytes.Buffer
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	rootCmd := GetRootCmd([]string{"options"})
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	rootCmd.SetOut(&out)
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	rootCmd.SetErr(&out)
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	fErr := rootCmd.Execute()
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	if fErr != nil {
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		t.Fatalf("options failed with %v and %q\n", fErr, out.String())
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	}
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	if !regexp.MustCompile(expectedOutput).Match(out.Bytes()) {
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		t.Fatalf("'istioctl options' expected output\n%s\n  got\n%s",
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			expectedOutput, out.String())
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	}
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}
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