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package main_test
import (
"strings"
. "github.com/SAP/cf-cli-java-plugin"
. "github.com/SAP/cf-cli-java-plugin/cmd/fakes"
. "github.com/SAP/cf-cli-java-plugin/uuid/fakes"
io_helpers "code.cloudfoundry.org/cli/util/testhelpers/io"
. "github.com/onsi/ginkgo"
. "github.com/onsi/gomega"
)
type commandOutput struct {
out string
err error
}
func captureOutput(closure func() (string, error)) (string, error, string) {
cliOutputChan := make(chan []string)
defer close(cliOutputChan)
cmdOutputChan := make(chan *commandOutput)
defer close(cmdOutputChan)
go func() {
cliOutput := io_helpers.CaptureOutput(func() {
output, err := closure()
cmdOutputChan <- &commandOutput{out: output, err: err}
})
cliOutputChan <- cliOutput
}()
var cliOutput []string
var cmdOutput *commandOutput
Eventually(cmdOutputChan, 5).Should(Receive(&cmdOutput))
Eventually(cliOutputChan).Should(Receive(&cliOutput))
cliOutputString := strings.Join(cliOutput, "|")
return cmdOutput.out, cmdOutput.err, cliOutputString
}
var _ = Describe("CfJavaPlugin", func() {
Describe("Run", func() {
var (
subject *JavaPlugin
commandExecutor *FakeCommandExecutor
uuidGenerator *FakeUUIDGenerator
)
BeforeEach(func() {
subject = &JavaPlugin{}
commandExecutor = new(FakeCommandExecutor)
uuidGenerator = new(FakeUUIDGenerator)
uuidGenerator.GenerateReturns("abcd-123456")
})
Context("when invoked without arguments", func() {
It("outputs an error and does not invoke cf ssh", func(done Done) {
defer close(done)
output, err, cliOutput := captureOutput(func() (string, error) {
output, err := subject.DoRun(commandExecutor, uuidGenerator, []string{"java"})
return output, err
})
Expect(output).To(BeEmpty())
Expect(err.Error()).To(ContainSubstring("No command provided"))
Expect(cliOutput).To(ContainSubstring("No command provided"))
Expect(commandExecutor.ExecuteCallCount()).To(Equal(1))
Expect(commandExecutor.ExecuteArgsForCall(0)).To(Equal([]string{"help", "java"}))
})
})
Context("when invoked with too many arguments", func() {
It("outputs an error and does not invoke cf ssh", func(done Done) {
defer close(done)
output, err, cliOutput := captureOutput(func() (string, error) {
output, err := subject.DoRun(commandExecutor, uuidGenerator, []string{"java", "heap-dump", "my_app", "ciao"})
return output, err
})
Expect(output).To(BeEmpty())
Expect(err.Error()).To(ContainSubstring("Too many arguments provided: ciao"))
Expect(cliOutput).To(ContainSubstring("Too many arguments provided: ciao"))
Expect(commandExecutor.ExecuteCallCount()).To(Equal(1))
Expect(commandExecutor.ExecuteArgsForCall(0)).To(Equal([]string{"help", "java"}))
})
})
Context("when invoked with an unknown command", func() {
It("outputs an error and does not invoke cf ssh", func(done Done) {
defer close(done)
output, err, cliOutput := captureOutput(func() (string, error) {
output, err := subject.DoRun(commandExecutor, uuidGenerator, []string{"java", "UNKNOWN_COMMAND"})
return output, err
})
Expect(output).To(BeEmpty())
Expect(err.Error()).To(ContainSubstring("Unrecognized command \"UNKNOWN_COMMAND\": supported commands are 'heap-dump' and 'thread-dump'"))
Expect(cliOutput).To(ContainSubstring("Unrecognized command \"UNKNOWN_COMMAND\": supported commands are 'heap-dump' and 'thread-dump'"))
Expect(commandExecutor.ExecuteCallCount()).To(Equal(1))
Expect(commandExecutor.ExecuteArgsForCall(0)).To(Equal([]string{"help", "java"}))
})
})
Context("when invoked to generate a heap-dump", func() {
Context("without application name", func() {
It("outputs an error and does not invoke cf ssh", func(done Done) {
defer close(done)
output, err, cliOutput := captureOutput(func() (string, error) {
output, err := subject.DoRun(commandExecutor, uuidGenerator, []string{"java", "heap-dump"})
return output, err
})
Expect(output).To(BeEmpty())
Expect(err.Error()).To(ContainSubstring("No application name provided"))
Expect(cliOutput).To(ContainSubstring("No application name provided"))
Expect(commandExecutor.ExecuteCallCount()).To(Equal(1))
Expect(commandExecutor.ExecuteArgsForCall(0)).To(Equal([]string{"help", "java"}))
})
})
Context("with too many arguments", func() {
It("outputs an error and does not invoke cf ssh", func(done Done) {
defer close(done)
output, err, cliOutput := captureOutput(func() (string, error) {
output, err := subject.DoRun(commandExecutor, uuidGenerator, []string{"java", "heap-dump", "my_app", "my_file", "ciao"})
return output, err
})
Expect(output).To(BeEmpty())
Expect(err.Error()).To(ContainSubstring("Too many arguments provided: my_file, ciao"))
Expect(cliOutput).To(ContainSubstring("Too many arguments provided: my_file, ciao"))
Expect(commandExecutor.ExecuteCallCount()).To(Equal(1))
Expect(commandExecutor.ExecuteArgsForCall(0)).To(Equal([]string{"help", "java"}))
})
})
Context("with just the app name", func() {
It("invokes cf ssh with the basic commands", func(done Done) {
defer close(done)
output, err, cliOutput := captureOutput(func() (string, error) {
output, err := subject.DoRun(commandExecutor, uuidGenerator, []string{"java", "heap-dump", "my_app"})
return output, err
})
Expect(output).To(BeEmpty())
Expect(err).To(BeNil())
Expect(cliOutput).To(Equal(""))
Expect(commandExecutor.ExecuteCallCount()).To(Equal(1))
Expect(commandExecutor.ExecuteArgsForCall(0)).To(Equal([]string{"ssh", "my_app", "--command", JavaDetectionCommand + "; if [ -f /tmp/heapdump-abcd-123456.hprof ]; then echo >&2 'Heap dump /tmp/heapdump-abcd-123456.hprof already exists'; exit 1; fi; OUTPUT=$( $(find -executable -name jmap | head -1) -dump:format=b,file=/tmp/heapdump-abcd-123456.hprof $(pidof java) ) || STATUS_CODE=$?; if [ ! -s /tmp/heapdump-abcd-123456.hprof ]; then echo >&2 ${OUTPUT}; exit 1; fi; if [ ${STATUS_CODE:-0} -gt 0 ]; then echo >&2 ${OUTPUT}; exit ${STATUS_CODE}; fi; cat /tmp/heapdump-abcd-123456.hprof; rm -f /tmp/heapdump-abcd-123456.hprof"}))
})
})
Context("for a container with index > 0", func() {
It("invokes cf ssh with the basic commands", func(done Done) {
defer close(done)
output, err, cliOutput := captureOutput(func() (string, error) {
output, err := subject.DoRun(commandExecutor, uuidGenerator, []string{"java", "heap-dump", "my_app", "-i", "4"})
return output, err
})
Expect(output).To(BeEmpty())
Expect(err).To(BeNil())
Expect(cliOutput).To(Equal(""))
Expect(commandExecutor.ExecuteCallCount()).To(Equal(1))
Expect(commandExecutor.ExecuteArgsForCall(0)).To(Equal([]string{"ssh", "my_app", "--app-instance-index", "4", "--command", JavaDetectionCommand + "; if [ -f /tmp/heapdump-abcd-123456.hprof ]; then echo >&2 'Heap dump /tmp/heapdump-abcd-123456.hprof already exists'; exit 1; fi; OUTPUT=$( $(find -executable -name jmap | head -1) -dump:format=b,file=/tmp/heapdump-abcd-123456.hprof $(pidof java) ) || STATUS_CODE=$?; if [ ! -s /tmp/heapdump-abcd-123456.hprof ]; then echo >&2 ${OUTPUT}; exit 1; fi; if [ ${STATUS_CODE:-0} -gt 0 ]; then echo >&2 ${OUTPUT}; exit ${STATUS_CODE}; fi; cat /tmp/heapdump-abcd-123456.hprof; rm -f /tmp/heapdump-abcd-123456.hprof"}))
})
})
Context("with the --keep flag", func() {
It("keeps the heap-dump on the container", func(done Done) {
defer close(done)
output, err, cliOutput := captureOutput(func() (string, error) {
output, err := subject.DoRun(commandExecutor, uuidGenerator, []string{"java", "heap-dump", "my_app", "-i", "4", "-k"})
return output, err
})
Expect(output).To(BeEmpty())
Expect(err).To(BeNil())
Expect(cliOutput).To(Equal(""))
Expect(commandExecutor.ExecuteCallCount()).To(Equal(1))
Expect(commandExecutor.ExecuteArgsForCall(0)).To(Equal([]string{"ssh", "my_app", "--app-instance-index", "4", "--command", JavaDetectionCommand + "; if [ -f /tmp/heapdump-abcd-123456.hprof ]; then echo >&2 'Heap dump /tmp/heapdump-abcd-123456.hprof already exists'; exit 1; fi; OUTPUT=$( $(find -executable -name jmap | head -1) -dump:format=b,file=/tmp/heapdump-abcd-123456.hprof $(pidof java) ) || STATUS_CODE=$?; if [ ! -s /tmp/heapdump-abcd-123456.hprof ]; then echo >&2 ${OUTPUT}; exit 1; fi; if [ ${STATUS_CODE:-0} -gt 0 ]; then echo >&2 ${OUTPUT}; exit ${STATUS_CODE}; fi; cat /tmp/heapdump-abcd-123456.hprof"}))
})
})
Context("with the --dry-run flag", func() {
It("prints out the command line without executing the command", func(done Done) {
defer close(done)
output, err, cliOutput := captureOutput(func() (string, error) {
output, err := subject.DoRun(commandExecutor, uuidGenerator, []string{"java", "heap-dump", "my_app", "-i", "4", "-k", "-n"})
return output, err
})
Expect(output).To(Equal("cf ssh my_app --app-instance-index 4 --command '" + JavaDetectionCommand + "; if [ -f /tmp/heapdump-abcd-123456.hprof ]; then echo >&2 'Heap dump /tmp/heapdump-abcd-123456.hprof already exists'; exit 1; fi; OUTPUT=$( $(find -executable -name jmap | head -1) -dump:format=b,file=/tmp/heapdump-abcd-123456.hprof $(pidof java) ) || STATUS_CODE=$?; if [ ! -s /tmp/heapdump-abcd-123456.hprof ]; then echo >&2 ${OUTPUT}; exit 1; fi; if [ ${STATUS_CODE:-0} -gt 0 ]; then echo >&2 ${OUTPUT}; exit ${STATUS_CODE}; fi; cat /tmp/heapdump-abcd-123456.hprof'"))
Expect(err).To(BeNil())
Expect(cliOutput).To(ContainSubstring("cf ssh my_app --app-instance-index 4 --command '" + JavaDetectionCommand + "; if [ -f /tmp/heapdump-abcd-123456.hprof ]; then echo >&2 'Heap dump /tmp/heapdump-abcd-123456.hprof already exists'; exit 1; fi; OUTPUT=$( $(find -executable -name jmap | head -1) -dump:format=b,file=/tmp/heapdump-abcd-123456.hprof $(pidof java) ) || STATUS_CODE=$?; if [ ! -s /tmp/heapdump-abcd-123456.hprof ]; then echo >&2 ${OUTPUT}; exit 1; fi; if [ ${STATUS_CODE:-0} -gt 0 ]; then echo >&2 ${OUTPUT}; exit ${STATUS_CODE}; fi; cat /tmp/heapdump-abcd-123456.hprof'"))
Expect(commandExecutor.ExecuteCallCount()).To(Equal(0))
})
})
})
Context("when invoked to generate a thread-dump", func() {
Context("without application name", func() {
It("outputs an error and does not invoke cf ssh", func(done Done) {
defer close(done)
output, err, cliOutput := captureOutput(func() (string, error) {
output, err := subject.DoRun(commandExecutor, uuidGenerator, []string{"java", "thread-dump"})
return output, err
})
Expect(output).To(BeEmpty())
Expect(err.Error()).To(ContainSubstring("No application name provided"))
Expect(cliOutput).To(ContainSubstring("No application name provided"))
Expect(commandExecutor.ExecuteCallCount()).To(Equal(1))
Expect(commandExecutor.ExecuteArgsForCall(0)).To(Equal([]string{"help", "java"}))
})
})
Context("with too many arguments", func() {
It("outputs an error and does not invoke cf ssh", func(done Done) {
defer close(done)
output, err, cliOutput := captureOutput(func() (string, error) {
output, err := subject.DoRun(commandExecutor, uuidGenerator, []string{"java", "thread-dump", "my_app", "my_file", "ciao"})
return output, err
})
Expect(output).To(BeEmpty())
Expect(err.Error()).To(ContainSubstring("Too many arguments provided: my_file, ciao"))
Expect(cliOutput).To(ContainSubstring("Too many arguments provided: my_file, ciao"))
Expect(commandExecutor.ExecuteCallCount()).To(Equal(1))
Expect(commandExecutor.ExecuteArgsForCall(0)).To(Equal([]string{"help", "java"}))
})
})
Context("with just the app name", func() {
It("invokes cf ssh with the basic commands", func(done Done) {
defer close(done)
output, err, cliOutput := captureOutput(func() (string, error) {
output, err := subject.DoRun(commandExecutor, uuidGenerator, []string{"java", "thread-dump", "my_app"})
return output, err
})
Expect(output).To(BeEmpty())
Expect(err).To(BeNil())
Expect(cliOutput).To(Equal(""))
Expect(commandExecutor.ExecuteCallCount()).To(Equal(1))
Expect(commandExecutor.ExecuteArgsForCall(0)).To(Equal([]string{"ssh", "my_app", "--command", JavaDetectionCommand + "; $(find -executable -name jstack | head -1) $(pidof java)"}))
})
})
Context("for a container with index > 0", func() {
It("invokes cf ssh with the basic commands", func(done Done) {
defer close(done)
output, err, cliOutput := captureOutput(func() (string, error) {
output, err := subject.DoRun(commandExecutor, uuidGenerator, []string{"java", "thread-dump", "my_app", "-i", "4"})
return output, err
})
Expect(output).To(BeEmpty())
Expect(err).To(BeNil())
Expect(cliOutput).To(Equal(""))
Expect(commandExecutor.ExecuteCallCount()).To(Equal(1))
Expect(commandExecutor.ExecuteArgsForCall(0)).To(Equal([]string{"ssh", "my_app", "--app-instance-index", "4", "--command", JavaDetectionCommand + "; $(find -executable -name jstack | head -1) $(pidof java)"}))
})
})
Context("with the --keep flag", func() {
It("fails", func(done Done) {
defer close(done)
output, err, cliOutput := captureOutput(func() (string, error) {
output, err := subject.DoRun(commandExecutor, uuidGenerator, []string{"java", "thread-dump", "my_app", "-i", "4", "-k"})
return output, err
})
Expect(output).To(BeEmpty())
Expect(err.Error()).To(ContainSubstring("The flag \"keep\" is not supported for thread-dumps"))
Expect(cliOutput).To(ContainSubstring("The flag \"keep\" is not supported for thread-dumps"))
Expect(commandExecutor.ExecuteCallCount()).To(Equal(1))
Expect(commandExecutor.ExecuteArgsForCall(0)).To(Equal([]string{"help", "java"}))
})
})
Context("with the --dry-run flag", func() {
It("prints out the command line without executing the command", func(done Done) {
defer close(done)
output, err, cliOutput := captureOutput(func() (string, error) {
output, err := subject.DoRun(commandExecutor, uuidGenerator, []string{"java", "thread-dump", "my_app", "-i", "4", "-n"})
return output, err
})
Expect(output).To(Equal("cf ssh my_app --app-instance-index 4 --command '" + JavaDetectionCommand + "; $(find -executable -name jstack | head -1) $(pidof java)'"))
Expect(err).To(BeNil())
Expect(cliOutput).To(ContainSubstring("cf ssh my_app --app-instance-index 4 --command '" + JavaDetectionCommand + "; $(find -executable -name jstack | head -1) $(pidof java)'"))
Expect(commandExecutor.ExecuteCallCount()).To(Equal(0))
})
})
})
})
})