Function TestMultipatch_Base64Encoding

pkg/coder/engine/multipatch_test.go:203–214

TestMultipatch_Base64Encoding exercises the encoding=base64 path so the LLM can ship binary-ish payloads (control chars, non-UTF8) via a single JSON envelope.

(t *testing.T)

// the LLM can ship binary-ish payloads (control chars, non-UTF8) via
// a single JSON envelope.
func TestMultipatch_Base64Encoding(t *testing.T) {
	dir := t.TempDir()
	path := writeFile(t, dir, "b.txt", "abc\ndef")
	eng, _, _ := newTestEngine(t, dir)

	// base64("abc\ndef") = "YWJjCmRlZg=="
	// base64("XYZ\n123") = "WFlaCjEyMw=="
	editsJSON := `[{"file":"` + path + `","search":"YWJjCmRlZg==","replace":"WFlaCjEyMw==","encoding":"base64"}]`
	err := eng.Execute(context.Background(), "multipatch", []string{"--edits", editsJSON})
	require.NoError(t, err)
	assert.Equal(t, "XYZ\n123", readFile(t, path))
}

// TestMultipatch_PerFileLockSerializesConcurrentTx is the key
// concurrency guarantee: two multipatches targeting the same file