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main_test.go
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main_test.go
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// Copyright 2024 Contrast Security, Inc.
//
// 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 main
import (
"bytes"
"crypto/sha256"
"encoding/hex"
"errors"
"io"
"net/http"
"net/http/httptest"
"os"
"os/exec"
"path/filepath"
"strings"
"testing"
"github.com/rogpeppe/go-internal/testscript"
)
func TestMain(m *testing.M) {
os.Exit(testscript.RunMain(m, map[string]func() int{
"contrast-go-installer": main1,
}))
}
// replacePath replaces the old location with the new location in $PATH
func replacePath(path, old, new string) string {
newpath := []string{}
for _, filepath := range strings.Split(path, ":") {
if filepath == old {
newpath = append(newpath, new)
} else {
newpath = append(newpath, filepath)
}
}
return strings.Join(newpath, ":")
}
func TestScripts(t *testing.T) {
testscript.Run(t, testscript.Params{
Dir: "testdata",
Setup: func(env *testscript.Env) error {
bin := filepath.Join(env.WorkDir, "bin")
if err := os.Mkdir(filepath.Join(env.WorkDir, "bin"), 0700); err != nil {
env.T().Fatal(err)
}
// go env GOBIN
installedGo, err := exec.LookPath("go")
if err != nil {
env.T().Fatal(err)
}
cmd := exec.Command(installedGo, "env", "GOBIN")
var stdout bytes.Buffer
cmd.Stdout = &stdout
if err := cmd.Run(); err != nil {
env.T().Fatal(err)
}
out := strings.Fields(stdout.String())
if len(out) > 0 {
// Remove previous GOBIN from $PATH, and add the new GOBIN
// to avoid shadowing contrast-go if it is already installed
// on your machine
env.Setenv("PATH", replacePath(env.Getenv("PATH"), out[0], bin))
} else {
// If GOBIN unset, no need to replace it in PATH
env.Setenv("PATH", env.Getenv("PATH")+":"+bin)
}
env.Setenv("GOBIN", bin)
return nil
},
Cmds: map[string]func(*testscript.TestScript, bool, []string){
"run-test-server": startServer,
},
Condition: func(cond string) (bool, error) {
switch cond {
case "real":
return false, nil
}
return false, errors.New("unrecognized condition")
},
})
}
const (
versdir = `<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">
<html><body><h1>Index of go-agent-release/</h1>
<pre>Name Last modified Size</pre><hr/>
<pre><a href="1.2.3/">1.2.3/</a> 26-Feb-2021 22:24 -
<a href="3.0.0/">3.0.0/</a> 07-Jul-2022 15:47 -
<a href="latest/">latest/</a> 22-Feb-2021 15:28 -
</pre><hr/><address style="font-size:small;">Online Server</address></body></html>`
archdir = `<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">
<html><body><h1>Index of go-agent-release/3.0.0</h1>
<pre>Name Last modified Size</pre><hr/>
<pre><a href="../">../</a>
<a href="darwin-amd64/">darwin-amd64/</a> 07-Jul-2022 15:47 -
<a href="darwin-arm64/">darwin-arm64/</a> 07-Jul-2022 15:47 -
<a href="linux-amd64/">linux-amd64/</a> 07-Jul-2022 15:47 -
<a href="dependencies.csv">dependencies.csv</a> 07-Jul-2022 15:47 1.25 KB
</pre><hr/><address style="font-size:small;">Online Server</address></body></html>`
archdirNoArm = `<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">
<html><body><h1>Index of go-agent-release/1.2.3</h1>
<pre>Name Last modified Size</pre><hr/>
<pre><a href="../">../</a>
<a href="darwin-amd64/">darwin-amd64/</a> 07-Jul-2022 15:47 -
<a href="linux-amd64/">linux-amd64/</a> 07-Jul-2022 15:47 -
<a href="dependencies.csv">dependencies.csv</a> 07-Jul-2022 15:47 1.25 KB
</pre><hr/><address style="font-size:small;">Online Server</address></body></html>`
)
var (
allowedOses = []string{"linux", "darwin"}
allowedArches = []string{"amd64", "arm64"}
)
func allowed(list []string, val string) bool {
for _, elem := range list {
if val == elem {
return true
}
}
return false
}
// startServer starts a test server to handle downloads and puts the server's
// address in the $baseURL environment variable.
func startServer(ts *testscript.TestScript, neg bool, args []string) {
srvHandler := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
if neg {
w.WriteHeader(404)
return
}
paths := strings.Split(r.RequestURI[1:], "/")
switch len(paths) {
case 0:
_, _ = w.Write([]byte(versdir))
case 1:
switch paths[0] {
case "latest":
http.Redirect(w, r, "../3.0.0", http.StatusSeeOther)
return
case "3.0.0":
_, _ = w.Write([]byte(archdir))
case "1.2.3":
_, _ = w.Write([]byte(archdirNoArm))
default:
w.WriteHeader(404)
}
//case 2:
// this would be the dir containing contrast-go, but we don't read it. handled by default case.
case 3:
osArch := strings.Split(paths[1], "-")
if len(osArch) != 2 {
w.WriteHeader(404)
return
}
arches := allowedArches
if paths[0] != "latest" && paths[0] != "3.0.0" {
// only later revisions have native arm64 binaries
arches = []string{"amd64"}
}
if !allowed(arches, osArch[1]) {
w.WriteHeader(404)
return
}
if !allowed(allowedOses, osArch[0]) {
w.WriteHeader(404)
return
}
if paths[2] == "contrast-go" {
_, _ = w.Write([]byte(r.RequestURI))
} else {
w.WriteHeader(404)
}
default:
ts.Fatalf("unexpected request for %s\n", r.RequestURI)
}
})
headHandler := func(h http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
if r.Method == http.MethodHead {
h := sha256.New()
_, err := io.Copy(h, bytes.NewBufferString(r.RequestURI))
if err != nil {
ts.Fatalf("unable to calculate checksum: %s", err)
}
hash := hex.EncodeToString(h.Sum(nil))
w.Header().Set("X-Checksum-sha256", hash)
}
h.ServeHTTP(w, r)
})
}
s := httptest.NewServer(headHandler(srvHandler))
ts.Defer(s.Close)
ts.Logf("test server listening at: %s", s.URL)
ts.Setenv("baseURL", s.URL)
}