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80 lines
2.5 KiB
80 lines
2.5 KiB
/*
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Copyright The Helm Authors.
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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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http://www.apache.org/licenses/LICENSE-2.0
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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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*/
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package main
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import (
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"bytes"
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"os"
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"os/exec"
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"runtime"
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"testing"
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)
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func TestPluginExitCode(t *testing.T) {
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if os.Getenv("RUN_MAIN_FOR_TESTING") == "1" {
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os.Args = []string{"helm", "exitwith", "2"}
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// We DO call helm's main() here. So this looks like a normal `helm` process.
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main()
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// As main calls os.Exit, we never reach this line.
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// But the test called this block of code catches and verifies the exit code.
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return
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}
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// Currently, plugins assume a Linux subsystem. Skip the execution
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// tests until this is fixed
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if runtime.GOOS != "windows" {
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// Do a second run of this specific test(TestPluginExitCode) with RUN_MAIN_FOR_TESTING=1 set,
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// So that the second run is able to run main() and this first run can verify the exit status returned by that.
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//
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// This technique originates from https://talks.golang.org/2014/testing.slide#23.
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cmd := exec.Command(os.Args[0], "-test.run=TestPluginExitCode")
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cmd.Env = append(
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os.Environ(),
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"RUN_MAIN_FOR_TESTING=1",
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// See pkg/cli/environment.go for which envvars can be used for configuring these passes
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// and also see plugin_test.go for how a plugin env can be set up.
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// This mimics the "exitwith" test case in TestLoadPlugins using envvars
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"HELM_PLUGINS=../../pkg/cmd/testdata/helmhome/helm/plugins",
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)
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stdout := &bytes.Buffer{}
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stderr := &bytes.Buffer{}
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cmd.Stdout = stdout
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cmd.Stderr = stderr
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err := cmd.Run()
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exiterr, ok := err.(*exec.ExitError)
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if !ok {
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t.Fatalf("Unexpected error returned by os.Exit: %T", err)
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}
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if stdout.String() != "" {
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t.Errorf("Expected no write to stdout: Got %q", stdout.String())
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}
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expectedStderr := "Error: plugin \"exitwith\" exited with error\n"
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if stderr.String() != expectedStderr {
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t.Errorf("Expected %q written to stderr: Got %q", expectedStderr, stderr.String())
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}
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if exiterr.ExitCode() != 2 {
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t.Errorf("Expected exit code 2: Got %d", exiterr.ExitCode())
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}
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}
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}
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