Add a -f flag to overwrite, and update tests

1 files changed, 147 insertions, 0 deletions

diff --git a/enc/enc_test.go b/enc/enc_test.go
new file mode 100644
index 0000000..e133b04
--- /dev/null
+++ b/enc/enc_test.go
@@ -0,0 +1,147 @@
+package main
+
+import (
+	"bytes"
+	"os"
+	"path/filepath"
+	"strings"
+	"testing"
+
+	"roseh.moe/cmd/sym/internal/sym"
+)
+
+func mustWriteFile(t *testing.T, path string, content []byte) {
+	t.Helper()
+	if err := os.WriteFile(path, content, 0600); err != nil {
+		t.Fatalf("Failed to write test file: %s", err)
+	}
+}
+
+func mustReadFile(t *testing.T, path string) []byte {
+	t.Helper()
+	content, err := os.ReadFile(path)
+	if err != nil {
+		t.Fatalf("Failed to read file: %s", err)
+	}
+	return content
+}
+
+func TestEnc(t *testing.T) {
+	t.Parallel()
+
+	const password = "asdf"
+	fileContent := []byte("test file content")
+	fileName := filepath.Join(t.TempDir(), "file")
+	mustWriteFile(t, fileName, fileContent)
+	if err := (&options{password: password}).enc(fileName); err != nil {
+		t.Fatalf("enc failed: %s", err)
+	}
+	if err := sym.DecryptFile(fileName+".enc", password, sym.Force(true)); err != nil {
+		t.Fatalf("Failed to decrypt encrypted file: %s", err)
+	}
+	gotFileContents := mustReadFile(t, fileName)
+	if !bytes.Equal(gotFileContents, fileContent) {
+		t.Errorf("encrypt round trip returned incorrect contents %q, want %q", gotFileContents, fileContent)
+	}
+}
+
+func TestEnc_UsageError(t *testing.T) {
+	t.Parallel()
+
+	for _, tc := range []struct {
+		desc             string
+		generatePassword bool
+		password         string
+		files            []string
+	}{{
+		desc:             "GeneratePasswordAndPassword",
+		generatePassword: true,
+		password:         "asdf",
+	}, {
+		desc:             "MissingPasswordStdin",
+		generatePassword: false,
+		password:         "",
+	}, {
+		desc:     "NonexistentFile",
+		password: "asdf",
+		files:    []string{"my-nonexistent-file.txt"},
+	}} {
+		t.Run(tc.desc, func(t *testing.T) {
+			t.Parallel()
+
+			opts := &options{
+				generatePassword: tc.generatePassword,
+				password:         tc.password,
+			}
+			if err := opts.enc(tc.files...); err == nil {
+				t.Errorf("enc(%+v) succeeded, want error", opts)
+			}
+		})
+	}
+}
+
+func TestEnc_GeneratePassword(t *testing.T) {
+	t.Parallel()
+
+	fileContent := []byte("test file content")
+	fileName := filepath.Join(t.TempDir(), "file")
+	mustWriteFile(t, fileName, fileContent)
+
+	password := new(strings.Builder)
+	opts := &options{
+		generatePassword: true,
+		passwordOut:      password,
+	}
+	if err := opts.enc(fileName); err != nil {
+		t.Fatalf("enc(%+v) failed: %s", opts, err)
+	}
+	pw := password.String()
+	if err := sym.DecryptFile(fileName+".enc", pw, sym.Force(true)); err != nil {
+		t.Fatalf("Failed to decrypt encrypted file with generated password %q: %s", pw, err)
+	}
+	gotFileContents := mustReadFile(t, fileName)
+	if !bytes.Equal(gotFileContents, fileContent) {
+		t.Errorf("encrypt round trip returned incorrect contents %q, want %q", gotFileContents, fileContent)
+	}
+}
+
+func TestEnc_Stdin(t *testing.T) {
+	t.Parallel()
+
+	for _, tc := range []struct {
+		desc  string
+		ascii bool
+	}{{
+		desc:  "Binary",
+		ascii: false,
+	}, {
+		desc:  "ASCII",
+		ascii: true,
+	}} {
+		t.Run(tc.desc, func(t *testing.T) {
+			t.Parallel()
+
+			const (
+				input    = "test input"
+				password = "asdf"
+			)
+			stdout := new(strings.Builder)
+			opts := &options{
+				password:    password,
+				asciiOutput: tc.ascii,
+				stdin:       strings.NewReader(input),
+				stdout:      stdout,
+			}
+			if err := opts.enc(); err != nil {
+				t.Errorf("enc(+%v) failed: %s", opts, err)
+			}
+			got := new(strings.Builder)
+			if err := sym.Decrypt(got, strings.NewReader(stdout.String()), password); err != nil {
+				t.Errorf("Failed to decrypt stdout content: %s", err)
+			}
+			if got, want := got.String(), input; got != want {
+				t.Errorf("Encrypt round-trip to stdout returned incorrect contents: %q, want %q", got, want)
+			}
+		})
+	}
+}