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// Copyright 2016 CNI authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package invoke_test
import (
"bytes"
"context"
"io/ioutil"
"os"
"github.com/containernetworking/cni/pkg/invoke"
noop_debug "github.com/containernetworking/cni/plugins/test/noop/debug"
. "github.com/onsi/ginkgo"
. "github.com/onsi/gomega"
)
var _ = Describe("RawExec", func() {
var (
debugFileName string
debug *noop_debug.Debug
environ []string
stdin []byte
execer *invoke.RawExec
ctx context.Context
)
const reportResult = `{ "some": "result" }`
BeforeEach(func() {
debugFile, err := ioutil.TempFile("", "cni_debug")
Expect(err).NotTo(HaveOccurred())
Expect(debugFile.Close()).To(Succeed())
debugFileName = debugFile.Name()
debug = &noop_debug.Debug{
ReportResult: reportResult,
ReportStderr: "some stderr message",
}
Expect(debug.WriteDebug(debugFileName)).To(Succeed())
environ = []string{
"CNI_COMMAND=ADD",
"CNI_CONTAINERID=some-container-id",
"CNI_ARGS=DEBUG=" + debugFileName,
"CNI_NETNS=/some/netns/path",
"CNI_PATH=/some/bin/path",
"CNI_IFNAME=some-eth0",
}
stdin = []byte(`{"name": "raw-exec-test", "some":"stdin-json", "cniVersion": "0.3.1"}`)
execer = &invoke.RawExec{}
ctx = context.TODO()
})
AfterEach(func() {
Expect(os.Remove(debugFileName)).To(Succeed())
})
It("runs the plugin with the given stdin and environment", func() {
_, err := execer.ExecPlugin(ctx, pathToPlugin, stdin, environ)
Expect(err).NotTo(HaveOccurred())
debug, err := noop_debug.ReadDebug(debugFileName)
Expect(err).NotTo(HaveOccurred())
Expect(debug.Command).To(Equal("ADD"))
Expect(debug.CmdArgs.StdinData).To(Equal(stdin))
Expect(debug.CmdArgs.Netns).To(Equal("/some/netns/path"))
})
It("returns the resulting stdout as bytes", func() {
resultBytes, err := execer.ExecPlugin(ctx, pathToPlugin, stdin, environ)
Expect(err).NotTo(HaveOccurred())
Expect(resultBytes).To(BeEquivalentTo(reportResult))
})
Context("when the Stderr writer is set", func() {
var stderrBuffer *bytes.Buffer
BeforeEach(func() {
stderrBuffer = &bytes.Buffer{}
execer.Stderr = stderrBuffer
})
It("forwards any stderr bytes to the Stderr writer", func() {
_, err := execer.ExecPlugin(ctx, pathToPlugin, stdin, environ)
Expect(err).NotTo(HaveOccurred())
Expect(stderrBuffer.String()).To(Equal("some stderr message"))
})
})
Context("when the plugin errors", func() {
BeforeEach(func() {
debug.ReportResult = ""
})
Context("and writes valid error JSON to stdout", func() {
It("wraps and returns the error", func() {
debug.ReportError = "banana"
Expect(debug.WriteDebug(debugFileName)).To(Succeed())
_, err := execer.ExecPlugin(ctx, pathToPlugin, stdin, environ)
Expect(err).To(HaveOccurred())
Expect(err).To(MatchError("banana"))
})
})
Context("and writes to stderr", func() {
It("returns an error message with stderr output", func() {
debug.ExitWithCode = 1
Expect(debug.WriteDebug(debugFileName)).To(Succeed())
_, err := execer.ExecPlugin(ctx, pathToPlugin, stdin, environ)
Expect(err).To(HaveOccurred())
Expect(err).To(MatchError(`netplugin failed: "some stderr message"`))
})
})
})
Context("when the plugin errors with no output on stdout or stderr", func() {
It("returns the exec error message", func() {
debug.ExitWithCode = 1
debug.ReportResult = ""
debug.ReportStderr = ""
Expect(debug.WriteDebug(debugFileName)).To(Succeed())
_, err := execer.ExecPlugin(ctx, pathToPlugin, stdin, environ)
Expect(err).To(HaveOccurred())
Expect(err).To(MatchError("netplugin failed with no error message: exit status 1"))
})
})
Context("when the system is unable to execute the plugin", func() {
It("returns the error", func() {
_, err := execer.ExecPlugin(ctx, "/tmp/some/invalid/plugin/path", stdin, environ)
Expect(err).To(HaveOccurred())
Expect(err).To(MatchError(ContainSubstring("/tmp/some/invalid/plugin/path")))
})
})
})
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