Files
mfer/internal/cli/entry_test.go
T
user 5b238e740b
check / check (push) Successful in 1m0s
Enforce real timeouts on gpg subprocess calls (closes #62)
Every gpg invocation went through runGPG, which built its command with
exec.CommandContext(context.Background(), ...). That is the right call
with the wrong context: context.Background() never expires, so no
deadline was ever enforced on any of the five gpg call sites.

runGPG now takes a context and derives a gpgTimeout deadline from it,
honouring an earlier caller deadline when there is one. The gpg-touching
library entry points take a ctx as their first argument so cancellation
propagates from above: Builder.Build, NewManifestFromReader,
NewManifestFromFile, NewChecker, Checker.ExtractEmbeddedSigningKeyFP.
Scanner.ToManifest already had a ctx and now passes it down, which
withdraws the //nolint:contextcheck claiming signing was "not
cancellable by design" -- it is, and now it is.

A deadline alone is not enough, and the added test proves it. gpg
delegates to helpers (gpg-agent, pinentry) that inherit the captured
stdout and stderr pipes. Go's default cancellation kills only the direct
child, so the helper keeps the pipes open and Cmd.Wait blocks on the
output-copying goroutines forever -- a dead process and a call that
still never returns. Two additions fix that: the child runs in its own
process group and cancellation kills the group, and Cmd.WaitDelay caps
how long Wait will hold on for the pipes if something escapes the group
anyway. Measured with the stand-in gpg from the new test: neither
mechanism, hangs until `go test` gives up; WaitDelay only, returns in
2.2s; both, returns in 0.20s.

Timeout errors now name the operation and how long gpg ran instead of
surfacing a bare "signal: killed" or "context deadline exceeded", and a
cancellation from above is reported as a cancellation rather than a
timeout, so an abort is distinguishable from a stall.

The test helper's own keygen invocations had the same unbounded
context.Background() and the same pipe-inheriting agent problem, which
makes them the actual mechanism behind the intermittent suite timeout
noted in the issue: keygen starts gpg-agent, and a stalled agent hung
the suite rather than failing it. They now run under a deadline with the
same hardening, so a broken gpg environment skips instead of hanging.

Verified with a cold `docker buildx build --no-cache`: prettier, gofmt,
`make lint` (0 issues) and `make test` all executed and passed. The
golang:1.23 image ships gpg, so the real signing, export, fingerprint,
import and verify tests run against real gpg there, not skipped.

The process-group kill is unix-only and lives in a build-tagged file; on
other platforms the deadline is still enforced via cancellation plus
WaitDelay, only the group kill of helpers is unavailable.
2026-09-03 14:50:59 +00:00

766 lines
21 KiB
Go

//nolint:testpackage // white-box tests exercise unexported internals
package cli
import (
"bytes"
"context"
"errors"
"fmt"
"math/rand"
"os"
"sync"
"testing"
"github.com/spf13/afero"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
urfcli "github.com/urfave/cli/v2"
"sneak.berlin/go/mfer/mfer"
)
const (
testApp = "mfer"
testDir = "/testdir"
testFile1 = "/testdir/file1.txt"
testMF = "/testdir/test.mf"
testOutput = "/output.mf"
testOutputTmp = "/output.mf.tmp"
testManifest = "/manifest.mf"
testFlagBase = "--base"
testFlagNoExtra = "--no-extra-files"
)
var errSimulatedWrite = errors.New("simulated write failure")
// runMu serializes CLI runs: RunWithOptions wires the process-global
// logger to the run's I/O streams, so parallel runs would cross-wire
// captured output between tests.
//
//nolint:gochecknoglobals // guards process-global logger state in tests
var runMu sync.Mutex
// runCLI invokes RunWithOptions while holding runMu so parallel tests
// capture their own output.
func runCLI(opts *RunOptions) int {
runMu.Lock()
defer runMu.Unlock()
return RunWithOptions(opts)
}
func TestMain(m *testing.M) {
// Prevent urfave/cli from calling os.Exit during tests
urfcli.OsExiter = func(_ int) {}
os.Exit(m.Run())
}
func TestBuild(t *testing.T) {
t.Parallel()
m := &CLIApp{}
assert.NotNil(t, m)
}
func testOpts(args []string, fs afero.Fs) *RunOptions {
return &RunOptions{
Appname: testApp,
Version: "1.0.0",
Gitrev: "abc123",
Args: args,
Stdin: &bytes.Buffer{},
Stdout: &bytes.Buffer{},
Stderr: &bytes.Buffer{},
Fs: fs,
}
}
func testStdout(t *testing.T, opts *RunOptions) string {
t.Helper()
buf, ok := opts.Stdout.(*bytes.Buffer)
require.True(t, ok)
return buf.String()
}
func testStderr(t *testing.T, opts *RunOptions) string {
t.Helper()
buf, ok := opts.Stderr.(*bytes.Buffer)
require.True(t, ok)
return buf.String()
}
func writeTestFile(t *testing.T, fs afero.Fs, path, content string) {
t.Helper()
require.NoError(t, afero.WriteFile(fs, path, []byte(content), 0o644))
}
func TestVersionCommand(t *testing.T) {
t.Parallel()
fs := afero.NewMemMapFs()
opts := testOpts([]string{testApp, "version"}, fs)
exitCode := runCLI(opts)
assert.Equal(t, 0, exitCode)
stdout := testStdout(t, opts)
assert.Contains(t, stdout, mfer.Version)
assert.Contains(t, stdout, "abc123")
}
func TestHelpCommand(t *testing.T) {
t.Parallel()
fs := afero.NewMemMapFs()
opts := testOpts([]string{testApp, "--help"}, fs)
exitCode := runCLI(opts)
assert.Equal(t, 0, exitCode)
stdout := testStdout(t, opts)
assert.Contains(t, stdout, cmdGenerate)
assert.Contains(t, stdout, cmdCheck)
assert.Contains(t, stdout, "fetch")
}
func TestGenerateCommand(t *testing.T) {
t.Parallel()
fs := afero.NewMemMapFs()
// Create test files in memory filesystem
require.NoError(t, fs.MkdirAll(testDir, 0o755))
writeTestFile(t, fs, testFile1, "hello world")
writeTestFile(t, fs, "/testdir/file2.txt", "test content")
opts := testOpts([]string{testApp, cmdGenerate, "-q", "-o", testMF, testDir}, fs)
exitCode := runCLI(opts)
assert.Equal(t, 0, exitCode, "stderr: %s", testStderr(t, opts))
// Verify manifest was created
exists, err := afero.Exists(fs, testMF)
require.NoError(t, err)
assert.True(t, exists)
}
func TestGenerateAndCheckCommand(t *testing.T) {
t.Parallel()
fs := afero.NewMemMapFs()
// Create test files with subdirectory
require.NoError(t, fs.MkdirAll("/testdir/subdir", 0o755))
writeTestFile(t, fs, testFile1, "hello world")
writeTestFile(t, fs, "/testdir/subdir/file2.txt", "test content")
// Generate manifest
opts := testOpts([]string{testApp, cmdGenerate, "-q", "-o", testMF, testDir}, fs)
exitCode := runCLI(opts)
require.Equal(t, 0, exitCode, "generate failed: %s", testStderr(t, opts))
// Check manifest
opts = testOpts([]string{testApp, cmdCheck, "-q", testFlagBase, testDir, testMF}, fs)
exitCode = runCLI(opts)
assert.Equal(t, 0, exitCode, "check failed: %s", testStderr(t, opts))
}
func TestCheckCommandWithMissingFile(t *testing.T) {
t.Parallel()
fs := afero.NewMemMapFs()
// Create test file
require.NoError(t, fs.MkdirAll(testDir, 0o755))
writeTestFile(t, fs, testFile1, "hello world")
// Generate manifest
opts := testOpts([]string{testApp, cmdGenerate, "-q", "-o", testMF, testDir}, fs)
exitCode := runCLI(opts)
require.Equal(t, 0, exitCode, "generate failed: %s", testStderr(t, opts))
// Delete the file
require.NoError(t, fs.Remove(testFile1))
// Check manifest - should fail
opts = testOpts([]string{testApp, cmdCheck, "-q", testFlagBase, testDir, testMF}, fs)
exitCode = runCLI(opts)
assert.Equal(t, 1, exitCode, "check should have failed for missing file")
}
func runCheckAfterRewrite(t *testing.T, rewritten, msg string) {
t.Helper()
fs := afero.NewMemMapFs()
// Create test file
require.NoError(t, fs.MkdirAll(testDir, 0o755))
writeTestFile(t, fs, testFile1, "hello world")
// Generate manifest
opts := testOpts([]string{testApp, cmdGenerate, "-q", "-o", testMF, testDir}, fs)
exitCode := runCLI(opts)
require.Equal(t, 0, exitCode, "generate failed: %s", testStderr(t, opts))
// Rewrite the file, then check the manifest - it must fail
writeTestFile(t, fs, testFile1, rewritten)
opts = testOpts([]string{testApp, cmdCheck, "-q", testFlagBase, testDir, testMF}, fs)
exitCode = runCLI(opts)
assert.Equal(t, 1, exitCode, msg)
}
func TestCheckCommandWithCorruptedFile(t *testing.T) {
t.Parallel()
// Corrupt the file (change content but keep same size)
runCheckAfterRewrite(t, "HELLO WORLD",
"check should have failed for corrupted file")
}
func TestCheckCommandWithSizeMismatch(t *testing.T) {
t.Parallel()
// Change file size
runCheckAfterRewrite(t, "different size content here",
"check should have failed for size mismatch")
}
func TestBannerOutput(t *testing.T) {
t.Parallel()
fs := afero.NewMemMapFs()
// Create test file
require.NoError(t, fs.MkdirAll(testDir, 0o755))
writeTestFile(t, fs, testFile1, "hello")
// Run without -q to see banner
opts := testOpts([]string{testApp, cmdGenerate, "-o", testMF, testDir}, fs)
exitCode := runCLI(opts)
assert.Equal(t, 0, exitCode)
// Banner ASCII art should be in stdout
stdout := testStdout(t, opts)
assert.Contains(t, stdout, "___")
assert.Contains(t, stdout, "\\")
}
func TestUnknownCommand(t *testing.T) {
t.Parallel()
fs := afero.NewMemMapFs()
opts := testOpts([]string{testApp, "unknown"}, fs)
exitCode := runCLI(opts)
assert.Equal(t, 1, exitCode)
}
func TestGenerateExcludesDotfilesByDefault(t *testing.T) {
t.Parallel()
fs := afero.NewMemMapFs()
// Create test files including dotfiles
require.NoError(t, fs.MkdirAll(testDir, 0o755))
writeTestFile(t, fs, testFile1, "hello")
writeTestFile(t, fs, "/testdir/.hidden", "secret")
// Generate manifest without --include-dotfiles (default excludes dotfiles)
opts := testOpts([]string{testApp, cmdGenerate, "-q", "-o", testMF, testDir}, fs)
exitCode := runCLI(opts)
require.Equal(t, 0, exitCode)
// Check that manifest exists
exists, _ := afero.Exists(fs, testMF)
assert.True(t, exists)
// Verify manifest only has 1 file (the non-dotfile)
manifest, err := mfer.NewManifestFromFile(context.Background(), fs, testMF)
require.NoError(t, err)
assert.Len(t, manifest.Files(), 1)
assert.Equal(t, "file1.txt", manifest.Files()[0].GetPath())
}
func TestGenerateWithIncludeDotfiles(t *testing.T) {
t.Parallel()
fs := afero.NewMemMapFs()
// Create test files including dotfiles
require.NoError(t, fs.MkdirAll(testDir, 0o755))
writeTestFile(t, fs, testFile1, "hello")
writeTestFile(t, fs, "/testdir/.hidden", "secret")
// Generate manifest with --include-dotfiles
opts := testOpts([]string{
testApp, cmdGenerate, "-q", "--include-dotfiles", "-o", testMF, testDir,
}, fs)
exitCode := runCLI(opts)
require.Equal(t, 0, exitCode)
// Verify manifest has 2 files (including dotfile)
manifest, err := mfer.NewManifestFromFile(context.Background(), fs, testMF)
require.NoError(t, err)
assert.Len(t, manifest.Files(), 2)
}
func TestMultipleInputPaths(t *testing.T) {
t.Parallel()
fs := afero.NewMemMapFs()
// Create test files in multiple directories
require.NoError(t, fs.MkdirAll("/dir1", 0o755))
require.NoError(t, fs.MkdirAll("/dir2", 0o755))
writeTestFile(t, fs, "/dir1/file1.txt", "content1")
writeTestFile(t, fs, "/dir2/file2.txt", "content2")
// Generate manifest from multiple paths
opts := testOpts([]string{
testApp, cmdGenerate, "-q", "-o", testOutput, "/dir1", "/dir2",
}, fs)
exitCode := runCLI(opts)
assert.Equal(t, 0, exitCode, "stderr: %s", testStderr(t, opts))
exists, _ := afero.Exists(fs, testOutput)
assert.True(t, exists)
}
func TestNoExtraFilesPass(t *testing.T) {
t.Parallel()
fs := afero.NewMemMapFs()
// Create test files
require.NoError(t, fs.MkdirAll(testDir, 0o755))
writeTestFile(t, fs, testFile1, "hello")
writeTestFile(t, fs, "/testdir/file2.txt", "world")
// Generate manifest
opts := testOpts([]string{testApp, cmdGenerate, "-q", "-o", testManifest, testDir}, fs)
exitCode := runCLI(opts)
require.Equal(t, 0, exitCode)
// Check with --no-extra-files (should pass - no extra files)
opts = testOpts([]string{
testApp, cmdCheck, "-q", testFlagNoExtra, testFlagBase, testDir, testManifest,
}, fs)
exitCode = runCLI(opts)
assert.Equal(t, 0, exitCode)
}
func TestNoExtraFilesFail(t *testing.T) {
t.Parallel()
fs := afero.NewMemMapFs()
// Create test files
require.NoError(t, fs.MkdirAll(testDir, 0o755))
writeTestFile(t, fs, testFile1, "hello")
// Generate manifest
opts := testOpts([]string{testApp, cmdGenerate, "-q", "-o", testManifest, testDir}, fs)
exitCode := runCLI(opts)
require.Equal(t, 0, exitCode)
// Add an extra file after manifest generation
writeTestFile(t, fs, "/testdir/extra.txt", "extra")
// Check with --no-extra-files (should fail - extra file exists)
opts = testOpts([]string{
testApp, cmdCheck, "-q", testFlagNoExtra, testFlagBase, testDir, testManifest,
}, fs)
exitCode = runCLI(opts)
assert.Equal(t, 1, exitCode, "check should fail when extra files exist")
}
func TestNoExtraFilesWithSubdirectory(t *testing.T) {
t.Parallel()
fs := afero.NewMemMapFs()
// Create test files with subdirectory
require.NoError(t, fs.MkdirAll("/testdir/subdir", 0o755))
writeTestFile(t, fs, testFile1, "hello")
writeTestFile(t, fs, "/testdir/subdir/file2.txt", "world")
// Generate manifest
opts := testOpts([]string{testApp, cmdGenerate, "-q", "-o", testManifest, testDir}, fs)
exitCode := runCLI(opts)
require.Equal(t, 0, exitCode)
// Add extra file in subdirectory
writeTestFile(t, fs, "/testdir/subdir/extra.txt", "extra")
// Check with --no-extra-files (should fail)
opts = testOpts([]string{
testApp, cmdCheck, "-q", testFlagNoExtra, testFlagBase, testDir, testManifest,
}, fs)
exitCode = runCLI(opts)
assert.Equal(t, 1, exitCode,
"check should fail when extra files exist in subdirectory")
}
func TestCheckWithoutNoExtraFilesIgnoresExtra(t *testing.T) {
t.Parallel()
fs := afero.NewMemMapFs()
// Create test file
require.NoError(t, fs.MkdirAll(testDir, 0o755))
writeTestFile(t, fs, testFile1, "hello")
// Generate manifest
opts := testOpts([]string{testApp, cmdGenerate, "-q", "-o", testManifest, testDir}, fs)
exitCode := runCLI(opts)
require.Equal(t, 0, exitCode)
// Add extra file
writeTestFile(t, fs, "/testdir/extra.txt", "extra")
// Check WITHOUT --no-extra-files (should pass - extra files ignored)
opts = testOpts([]string{
testApp, cmdCheck, "-q", testFlagBase, testDir, testManifest,
}, fs)
exitCode = runCLI(opts)
assert.Equal(t, 0, exitCode,
"check without --no-extra-files should ignore extra files")
}
func TestGenerateAtomicWriteNoTempFileOnSuccess(t *testing.T) {
t.Parallel()
fs := afero.NewMemMapFs()
// Create test file
require.NoError(t, fs.MkdirAll(testDir, 0o755))
writeTestFile(t, fs, testFile1, "hello")
// Generate manifest
opts := testOpts([]string{testApp, cmdGenerate, "-q", "-o", testOutput, testDir}, fs)
exitCode := runCLI(opts)
require.Equal(t, 0, exitCode)
// Verify output file exists
exists, err := afero.Exists(fs, testOutput)
require.NoError(t, err)
assert.True(t, exists, "output file should exist")
// Verify temp file does NOT exist
tmpExists, err := afero.Exists(fs, testOutputTmp)
require.NoError(t, err)
assert.False(t, tmpExists,
"temp file should not exist after successful generation")
}
func TestGenerateAtomicWriteOverwriteWithForce(t *testing.T) {
t.Parallel()
fs := afero.NewMemMapFs()
// Create test file
require.NoError(t, fs.MkdirAll(testDir, 0o755))
writeTestFile(t, fs, testFile1, "hello")
// Create existing manifest with different content
writeTestFile(t, fs, testOutput, "old content")
// Generate manifest with --force
opts := testOpts([]string{
testApp, cmdGenerate, "-q", "-f", "-o", testOutput, testDir,
}, fs)
exitCode := runCLI(opts)
require.Equal(t, 0, exitCode)
// Verify output file exists and was overwritten
content, err := afero.ReadFile(fs, testOutput)
require.NoError(t, err)
assert.NotEqual(t, "old content", string(content),
"manifest should be overwritten")
// Verify temp file does NOT exist
tmpExists, err := afero.Exists(fs, testOutputTmp)
require.NoError(t, err)
assert.False(t, tmpExists,
"temp file should not exist after successful generation")
}
func TestGenerateFailsWithoutForceWhenOutputExists(t *testing.T) {
t.Parallel()
fs := afero.NewMemMapFs()
// Create test file
require.NoError(t, fs.MkdirAll(testDir, 0o755))
writeTestFile(t, fs, testFile1, "hello")
// Create existing manifest
writeTestFile(t, fs, testOutput, "existing")
// Generate manifest WITHOUT --force (should fail)
opts := testOpts([]string{testApp, cmdGenerate, "-q", "-o", testOutput, testDir}, fs)
exitCode := runCLI(opts)
assert.Equal(t, 1, exitCode, "should fail when output exists without --force")
// Verify original content is preserved
content, err := afero.ReadFile(fs, testOutput)
require.NoError(t, err)
assert.Equal(t, "existing", string(content), "original file should be preserved")
}
func TestGenerateAtomicWriteUsesTemp(t *testing.T) {
t.Parallel()
// This test verifies that generate uses a temp file by checking
// that the output file doesn't exist until generation completes.
// We do this by generating to a path and verifying the temp file
// pattern is used (output.mf.tmp -> output.mf)
fs := afero.NewMemMapFs()
// Create test file
require.NoError(t, fs.MkdirAll(testDir, 0o755))
writeTestFile(t, fs, testFile1, "hello")
// Generate manifest
opts := testOpts([]string{testApp, cmdGenerate, "-q", "-o", testOutput, testDir}, fs)
exitCode := runCLI(opts)
require.Equal(t, 0, exitCode)
// Both output file should exist and temp should not
exists, _ := afero.Exists(fs, testOutput)
assert.True(t, exists, "output file should exist")
tmpExists, _ := afero.Exists(fs, testOutputTmp)
assert.False(t, tmpExists, "temp file should be cleaned up")
// Verify manifest is valid (not empty)
content, err := afero.ReadFile(fs, testOutput)
require.NoError(t, err)
assert.NotEmpty(t, content, "manifest should not be empty")
}
// failingWriterFs wraps a filesystem and makes writes fail after N bytes
type failingWriterFs struct {
afero.Fs
failAfter int64
written int64
}
type failingFile struct {
afero.File
fs *failingWriterFs
}
func (f *failingFile) Write(p []byte) (int, error) {
f.fs.written += int64(len(p))
if f.fs.written > f.fs.failAfter {
return 0, errSimulatedWrite
}
return f.File.Write(p)
}
//nolint:ireturn // Create must return afero.File to satisfy afero.Fs.
func (fs *failingWriterFs) Create(name string) (afero.File, error) {
f, err := fs.Fs.Create(name)
if err != nil {
return nil, err
}
return &failingFile{File: f, fs: fs}, nil
}
func TestGenerateAtomicWriteCleansUpOnError(t *testing.T) {
t.Parallel()
baseFs := afero.NewMemMapFs()
// Create test files - need enough content to trigger the write failure
require.NoError(t, baseFs.MkdirAll(testDir, 0o755))
writeTestFile(t, baseFs, testFile1, "hello world this is a test file")
// Wrap with failing writer that fails after writing some bytes
fs := &failingWriterFs{Fs: baseFs, failAfter: 10}
// Generate manifest - should fail during write
opts := testOpts([]string{testApp, cmdGenerate, "-q", "-o", testOutput, testDir}, fs)
exitCode := runCLI(opts)
assert.Equal(t, 1, exitCode, "should fail due to write error")
// With atomic writes: output.mf should NOT exist (temp was cleaned up)
// With non-atomic writes: output.mf WOULD exist (partial/empty)
exists, _ := afero.Exists(baseFs, testOutput)
assert.False(t, exists,
"output file should not exist after failed generation (atomic write)")
// Temp file should also not exist
tmpExists, _ := afero.Exists(baseFs, testOutputTmp)
assert.False(t, tmpExists,
"temp file should be cleaned up after failed generation")
}
func TestGenerateValidatesInputPaths(t *testing.T) {
t.Parallel()
seedValidDir := func(t *testing.T, fs afero.Fs) {
t.Helper()
require.NoError(t, fs.MkdirAll("/validdir", 0o755))
writeTestFile(t, fs, "/validdir/file.txt", "content")
}
t.Run("nonexistent path fails fast", func(t *testing.T) {
t.Parallel()
fs := afero.NewMemMapFs()
seedValidDir(t, fs)
opts := testOpts([]string{
testApp, cmdGenerate, "-q", "-o", testOutput, "/nonexistent",
}, fs)
exitCode := runCLI(opts)
assert.Equal(t, 1, exitCode)
stderr := testStderr(t, opts)
assert.Contains(t, stderr, "path does not exist")
assert.Contains(t, stderr, "/nonexistent")
})
t.Run("mix of valid and invalid paths fails fast", func(t *testing.T) {
t.Parallel()
fs := afero.NewMemMapFs()
seedValidDir(t, fs)
opts := testOpts([]string{
testApp, cmdGenerate, "-q", "-o", testOutput,
"/validdir", "/alsononexistent",
}, fs)
exitCode := runCLI(opts)
assert.Equal(t, 1, exitCode)
stderr := testStderr(t, opts)
assert.Contains(t, stderr, "path does not exist")
assert.Contains(t, stderr, "/alsononexistent")
// Output file should not have been created
exists, _ := afero.Exists(fs, testOutput)
assert.False(t, exists,
"output file should not exist when path validation fails")
})
t.Run("valid paths succeed", func(t *testing.T) {
t.Parallel()
fs := afero.NewMemMapFs()
seedValidDir(t, fs)
opts := testOpts([]string{
testApp, cmdGenerate, "-q", "-o", testOutput, "/validdir",
}, fs)
exitCode := runCLI(opts)
assert.Equal(t, 0, exitCode)
})
}
func TestCheckDetectsManifestCorruption(t *testing.T) {
t.Parallel()
fs := afero.NewMemMapFs()
rng := rand.New(rand.NewSource(42)) //nolint:gosec // deterministic test data
// Create many small files with random names to generate a ~1MB manifest
// Each manifest entry is roughly 50-60 bytes, so we need ~20000 files
require.NoError(t, fs.MkdirAll(testDir, 0o755))
numFiles := 20000
for range numFiles {
// Generate random filename
filename := fmt.Sprintf("/testdir/%08x%08x%08x.dat",
rng.Uint32(), rng.Uint32(), rng.Uint32())
// Small random content
content := make([]byte, 16+rng.Intn(48))
_, _ = rng.Read(content)
require.NoError(t, afero.WriteFile(fs, filename, content, 0o644))
}
// Generate manifest outside of testdir
opts := testOpts([]string{testApp, cmdGenerate, "-q", "-o", testManifest, testDir}, fs)
exitCode := runCLI(opts)
require.Equal(t, 0, exitCode, "generate should succeed")
// Read the valid manifest and verify it's approximately 1MB
validManifest, err := afero.ReadFile(fs, testManifest)
require.NoError(t, err)
require.GreaterOrEqual(t, len(validManifest), 1024*1024,
"manifest should be at least 1MB, got %d bytes", len(validManifest))
t.Logf("manifest size: %d bytes (%d files)", len(validManifest), numFiles)
// First corruption: truncate the manifest
require.NoError(t, afero.WriteFile(fs, testManifest,
validManifest[:len(validManifest)/2], 0o644))
// Check should fail with truncated manifest
opts = testOpts([]string{
testApp, cmdCheck, "-q", testFlagBase, testDir, testManifest,
}, fs)
exitCode = runCLI(opts)
assert.Equal(t, 1, exitCode, "check should fail with truncated manifest")
// Verify check passes with valid manifest
require.NoError(t, afero.WriteFile(fs, testManifest, validManifest, 0o644))
opts = testOpts([]string{
testApp, cmdCheck, "-q", testFlagBase, testDir, testManifest,
}, fs)
exitCode = runCLI(opts)
require.Equal(t, 0, exitCode, "check should pass with valid manifest")
// Now do 500 random corruption iterations
for i := range 500 {
// Corrupt: write a random byte at a random offset
corrupted := make([]byte, len(validManifest))
copy(corrupted, validManifest)
offset := rng.Intn(len(corrupted))
originalByte := corrupted[offset]
// Make sure we actually change the byte
buf := make([]byte, 1)
newByte := originalByte
for newByte == originalByte {
_, _ = rng.Read(buf)
newByte = buf[0]
}
corrupted[offset] = newByte
require.NoError(t, afero.WriteFile(fs, testManifest, corrupted, 0o644))
// Check should fail with corrupted manifest
opts = testOpts([]string{
testApp, cmdCheck, "-q", testFlagBase, testDir, testManifest,
}, fs)
exitCode = runCLI(opts)
assert.Equal(t, 1, exitCode,
"iteration %d: check should fail with corrupted manifest "+
"(offset %d, 0x%02x -> 0x%02x)",
i, offset, originalByte, newByte)
// Restore valid manifest for next iteration
require.NoError(t, afero.WriteFile(fs, testManifest, validManifest, 0o644))
}
}