Artifact [9e573bd1fa]

Artifact 9e573bd1faf7d9e85d530285889bb23ae365fe274d420790d387679c8bbd2488:

• File internal/diff/diff_fuzz_test.go — part of check-in [f5744359d3] at 2026-04-19 16:30:54 on branch trunk — Initial open source release

  libfossil is a pure-Go implementation of the Fossil SCM, reading and writing the same .fossil SQLite repository format as upstream Fossil.

  This is the first public release of code that previously lived in a private repository. The module path is github.com/danmestas/libfossil and the binary is named libfossil to avoid $PATH collisions with upstream fossil.

  Included: - Repo lifecycle (create, clone), checkout/checkin, timeline, merge, diff, annotate, shun, tag, branch, bisect, stash, undo/redo - Sync-over-HTTP protocol (client and handler) - Two SQLite drivers: modernc (pure Go, default) and ncruces (wasm-capable) - Observer interfaces (SyncObserver, CheckoutObserver) with an optional OpenTelemetry implementation in observer/otel (separate submodule) - Deterministic simulation testing harness with BUGGIFY fault injection - Kong-based embeddable CLI under cli/ and a standalone binary under cmd/libfossil/ (user: [email protected], size: 714) [annotate] [blame] [check-ins using]

package diff

import "testing"

func FuzzUnified(f *testing.F) {
	f.Add([]byte("a\nb\n"), []byte("a\nc\n"))
	f.Add([]byte(""), []byte("hello\n"))
	f.Add([]byte("hello\n"), []byte(""))
	f.Add([]byte("same\n"), []byte("same\n"))
	f.Add([]byte("\x00binary"), []byte("text\n"))
	f.Add([]byte("a\r\nb\r\n"), []byte("a\nb\n"))

	f.Fuzz(func(t *testing.T, a, b []byte) {
		// Must not panic (negative ContextLines is caught, but fuzz uses 3).
		_ = Unified(a, b, Options{ContextLines: 3})

		stat := Stat(a, b)
		if stat.Binary {
			return
		}
		if stat.Insertions < 0 {
			t.Fatalf("negative insertions: %d", stat.Insertions)
		}
		if stat.Deletions < 0 {
			t.Fatalf("negative deletions: %d", stat.Deletions)
		}
	})
}