gpg: refactor tests for macos compatibility

Refactor lib/crypto/gpg tests to facilitate unit test runs on macos.
Macos creates temporary directories with names too long to call
gpg-agent (108 characters). Additionally, too many concurrent test calls
created IPC errors to gpg-agent. To get around this, tests were given
shorter names and refactored into subtests to create fewer concurrent
tests

Tested on Linux and MacOS.

Signed-off-by: Tim Culverhouse <tim@timculverhouse.com>
Acked-by: Robin Jarry <robin@jarry.cc>

3 files changed, 156 insertions, 186 deletions

diff --git a/lib/crypto/gpg/gpg_test.go b/lib/crypto/gpg/gpg_test.go
index d833830..e34cc2b 100644
--- a/lib/crypto/gpg/gpg_test.go
+++ b/lib/crypto/gpg/gpg_test.go
@@ -31,41 +31,41 @@ func toCRLF(s string) string {
 	return strings.ReplaceAll(s, "\n", "\r\n")
 }
 
-func deepEqual(t *testing.T, r *models.MessageDetails, expect *models.MessageDetails) {
+func deepEqual(t *testing.T, name string, r *models.MessageDetails, expect *models.MessageDetails) {
 	var resBuf bytes.Buffer
 	if _, err := io.Copy(&resBuf, r.Body); err != nil {
-		t.Fatalf("io.Copy() = %v", err)
+		t.Fatalf("%s: io.Copy() = %v", name, err)
 	}
 
 	var expBuf bytes.Buffer
 	if _, err := io.Copy(&expBuf, expect.Body); err != nil {
-		t.Fatalf("io.Copy() = %v", err)
+		t.Fatalf("%s: io.Copy() = %v", name, err)
 	}
 
 	if resBuf.String() != expBuf.String() {
-		t.Errorf("MessagesDetails.Body = \n%v\n but want \n%v", resBuf.String(), expBuf.String())
+		t.Errorf("%s: MessagesDetails.Body = \n%v\n but want \n%v", name, resBuf.String(), expBuf.String())
 	}
 
 	if r.IsEncrypted != expect.IsEncrypted {
-		t.Errorf("IsEncrypted = \n%v\n but want \n%v", r.IsEncrypted, expect.IsEncrypted)
+		t.Errorf("%s: IsEncrypted = \n%v\n but want \n%v", name, r.IsEncrypted, expect.IsEncrypted)
 	}
 	if r.IsSigned != expect.IsSigned {
-		t.Errorf("IsSigned = \n%v\n but want \n%v", r.IsSigned, expect.IsSigned)
+		t.Errorf("%s: IsSigned = \n%v\n but want \n%v", name, r.IsSigned, expect.IsSigned)
 	}
 	if r.SignedBy != expect.SignedBy {
-		t.Errorf("SignedBy = \n%v\n but want \n%v", r.SignedBy, expect.SignedBy)
+		t.Errorf("%s: SignedBy = \n%v\n but want \n%v", name, r.SignedBy, expect.SignedBy)
 	}
 	if r.SignedByKeyId != expect.SignedByKeyId {
-		t.Errorf("SignedByKeyId = \n%v\n but want \n%v", r.SignedByKeyId, expect.SignedByKeyId)
+		t.Errorf("%s: SignedByKeyId = \n%v\n but want \n%v", name, r.SignedByKeyId, expect.SignedByKeyId)
 	}
 	if r.SignatureError != expect.SignatureError {
-		t.Errorf("SignatureError = \n%v\n but want \n%v", r.SignatureError, expect.SignatureError)
+		t.Errorf("%s: SignatureError = \n%v\n but want \n%v", name, r.SignatureError, expect.SignatureError)
 	}
 	if r.DecryptedWith != expect.DecryptedWith {
-		t.Errorf("DecryptedWith = \n%v\n but want \n%v", r.DecryptedWith, expect.DecryptedWith)
+		t.Errorf("%s: DecryptedWith = \n%v\n but want \n%v", name, r.DecryptedWith, expect.DecryptedWith)
 	}
 	if r.DecryptedWithKeyId != expect.DecryptedWithKeyId {
-		t.Errorf("DecryptedWithKeyId = \n%v\n but want \n%v", r.DecryptedWithKeyId, expect.DecryptedWithKeyId)
+		t.Errorf("%s: DecryptedWithKeyId = \n%v\n but want \n%v", name, r.DecryptedWithKeyId, expect.DecryptedWithKeyId)
 	}
 }
 
diff --git a/lib/crypto/gpg/reader_test.go b/lib/crypto/gpg/reader_test.go
index 06cf7a3..957a727 100644
--- a/lib/crypto/gpg/reader_test.go
+++ b/lib/crypto/gpg/reader_test.go
@@ -1,8 +1,6 @@
 package gpg
 
 import (
-	"bytes"
-	"io"
 	"strings"
 	"testing"
 
@@ -20,135 +18,100 @@ func importPublicKey() {
 	gpgbin.Import(r)
 }
 
-func TestReader_encryptedSignedPGPMIME(t *testing.T) {
-	initGPGtest(t)
-
-	var expect = models.MessageDetails{
-		IsEncrypted:        true,
-		IsSigned:           true,
-		SignedBy:           "John Doe (This is a test key) <john.doe@example.org>",
-		SignedByKeyId:      3490876580878068068,
-		SignatureError:     "",
-		DecryptedWith:      "John Doe (This is a test key) <john.doe@example.org>",
-		DecryptedWithKeyId: 3490876580878068068,
-		Body:               strings.NewReader(testEncryptedBody),
-		Micalg:             "pgp-sha512",
-	}
-
-	importSecretKey()
-	sr := strings.NewReader(testPGPMIMEEncryptedSigned)
-	r, err := Read(sr)
-	if err != nil {
-		t.Fatalf("pgpmail.Read() = %v", err)
-	}
-
-	deepEqual(t, r.MessageDetails, &expect)
-}
-
-func TestReader_signedPGPMIME(t *testing.T) {
-	initGPGtest(t)
-
-	var expect = models.MessageDetails{
-		IsEncrypted:        false,
-		IsSigned:           true,
-		SignedBy:           "John Doe (This is a test key) <john.doe@example.org>",
-		SignedByKeyId:      3490876580878068068,
-		SignatureError:     "",
-		DecryptedWith:      "",
-		DecryptedWithKeyId: 0,
-		Body:               strings.NewReader(testSignedBody),
-		Micalg:             "pgp-sha256",
-	}
-
-	importSecretKey()
-	importPublicKey()
-	sr := strings.NewReader(testPGPMIMESigned)
-	r, err := Read(sr)
-	if err != nil {
-		t.Fatalf("pgpmail.Read() = %v", err)
-	}
-
-	deepEqual(t, r.MessageDetails, &expect)
+type readerTestCase struct {
+	name  string
+	want  models.MessageDetails
+	input string
 }
 
-func TestReader_encryptedSignedEncapsulatedPGPMIME(t *testing.T) {
+func TestReader(t *testing.T) {
 	initGPGtest(t)
-
-	var expect = models.MessageDetails{
-		IsEncrypted:        true,
-		IsSigned:           true,
-		SignedBy:           "John Doe (This is a test key) <john.doe@example.org>",
-		SignedByKeyId:      3490876580878068068,
-		SignatureError:     "",
-		DecryptedWith:      "John Doe (This is a test key) <john.doe@example.org>",
-		DecryptedWithKeyId: 3490876580878068068,
-		Body:               strings.NewReader(testSignedBody),
-		Micalg:             "pgp-sha256",
-	}
-
-	importSecretKey()
 	importPublicKey()
-	sr := strings.NewReader(testPGPMIMEEncryptedSignedEncapsulated)
-	r, err := Read(sr)
-	if err != nil {
-		t.Fatalf("pgpmail.Read() = %v", err)
-	}
-
-	deepEqual(t, r.MessageDetails, &expect)
-
-	var buf bytes.Buffer
-	if _, err := io.Copy(&buf, r.MessageDetails.Body); err != nil {
-		t.Fatalf("io.Copy() = %v", err)
-	}
-}
-func TestReader_signedPGPMIMEInvalid(t *testing.T) {
-	initGPGtest(t)
-
-	var expect = models.MessageDetails{
-		IsEncrypted:        false,
-		IsSigned:           true,
-		SignedBy:           "John Doe (This is a test key) <john.doe@example.org>",
-		SignedByKeyId:      3490876580878068068,
-		SignatureError:     "gpg: invalid signature",
-		DecryptedWith:      "",
-		DecryptedWithKeyId: 0,
-		Body:               strings.NewReader(testSignedInvalidBody),
-		Micalg:             "",
-	}
-
 	importSecretKey()
-	importPublicKey()
-	sr := strings.NewReader(testPGPMIMESignedInvalid)
-	r, err := Read(sr)
-	if err != nil {
-		t.Fatalf("pgpmail.Read() = %v", err)
-	}
-	deepEqual(t, r.MessageDetails, &expect)
-}
-
-func TestReader_plaintext(t *testing.T) {
-	initGPGtest(t)
 
-	sr := strings.NewReader(testPlaintext)
-	r, err := Read(sr)
-	if err != nil {
-		t.Fatalf("pgpmail.Read() = %v", err)
-	}
-
-	var buf bytes.Buffer
-	if _, err := io.Copy(&buf, r.MessageDetails.Body); err != nil {
-		t.Fatalf("io.Copy() = %v", err)
-	}
-
-	if r.MessageDetails.IsEncrypted {
-		t.Errorf("MessageDetails.IsEncrypted != false")
-	}
-	if r.MessageDetails.IsSigned {
-		t.Errorf("MessageDetails.IsSigned != false")
+	testCases := []readerTestCase{
+		{
+			name:  "Encrypted and Signed",
+			input: testPGPMIMEEncryptedSigned,
+			want: models.MessageDetails{
+				IsEncrypted:        true,
+				IsSigned:           true,
+				SignedBy:           "John Doe (This is a test key) <john.doe@example.org>",
+				SignedByKeyId:      3490876580878068068,
+				SignatureValidity:  0,
+				SignatureError:     "",
+				DecryptedWith:      "John Doe (This is a test key) <john.doe@example.org>",
+				DecryptedWithKeyId: 3490876580878068068,
+				Body:               strings.NewReader(testEncryptedBody),
+				Micalg:             "pgp-sha512",
+			},
+		},
+		{
+			name:  "Signed",
+			input: testPGPMIMESigned,
+			want: models.MessageDetails{
+				IsEncrypted:        false,
+				IsSigned:           true,
+				SignedBy:           "John Doe (This is a test key) <john.doe@example.org>",
+				SignedByKeyId:      3490876580878068068,
+				SignatureValidity:  0,
+				SignatureError:     "",
+				DecryptedWith:      "",
+				DecryptedWithKeyId: 0,
+				Body:               strings.NewReader(testSignedBody),
+				Micalg:             "pgp-sha256",
+			},
+		},
+		{
+			name:  "Encapsulated Signature",
+			input: testPGPMIMEEncryptedSignedEncapsulated,
+			want: models.MessageDetails{
+				IsEncrypted:        true,
+				IsSigned:           true,
+				SignedBy:           "John Doe (This is a test key) <john.doe@example.org>",
+				SignedByKeyId:      3490876580878068068,
+				SignatureValidity:  0,
+				SignatureError:     "",
+				DecryptedWith:      "John Doe (This is a test key) <john.doe@example.org>",
+				DecryptedWithKeyId: 3490876580878068068,
+				Body:               strings.NewReader(testSignedBody),
+			},
+		},
+		{
+			name:  "Invalid Signature",
+			input: testPGPMIMESignedInvalid,
+			want: models.MessageDetails{
+				IsEncrypted:        false,
+				IsSigned:           true,
+				SignedBy:           "John Doe (This is a test key) <john.doe@example.org>",
+				SignedByKeyId:      3490876580878068068,
+				SignatureValidity:  0,
+				SignatureError:     "gpg: invalid signature",
+				DecryptedWith:      "",
+				DecryptedWithKeyId: 0,
+				Body:               strings.NewReader(testSignedInvalidBody),
+				Micalg:             "",
+			},
+		},
+		{
+			name:  "Plain text",
+			input: testPlaintext,
+			want: models.MessageDetails{
+				IsEncrypted: false,
+				IsSigned:    false,
+				Body:        strings.NewReader(testPlaintext),
+			},
+		},
 	}
 
-	if s := buf.String(); s != testPlaintext {
-		t.Errorf("MessagesDetails.UnverifiedBody = \n%v\n but want \n%v", s, testPlaintext)
+	for _, tc := range testCases {
+		t.Logf("Test case: %s", tc.name)
+		sr := strings.NewReader(tc.input)
+		r, err := Read(sr)
+		if err != nil {
+			t.Fatalf("gpg.Read() = %v", err)
+		}
+		deepEqual(t, tc.name, r.MessageDetails, &tc.want)
 	}
 }
 
diff --git a/lib/crypto/gpg/writer_test.go b/lib/crypto/gpg/writer_test.go
index e8defc1..0355db5 100644
--- a/lib/crypto/gpg/writer_test.go
+++ b/lib/crypto/gpg/writer_test.go
@@ -15,39 +15,76 @@ func init() {
 	forceBoundary = "foo"
 }
 
-func TestEncrypt(t *testing.T) {
-	initGPGtest(t)
+type writerTestCase struct {
+	name   string
+	method string
+	body   string
+}
 
+func TestWriter(t *testing.T) {
+	initGPGtest(t)
 	importPublicKey()
 	importSecretKey()
+
+	testCases := []writerTestCase{
+		{
+			name:   "Encrypt",
+			method: "encrypt",
+			body:   "This is an encrypted message!\r\n",
+		},
+		{
+			name:   "Sign",
+			method: "sign",
+			body:   "This is a signed message!\r\n",
+		},
+	}
 	var h textproto.Header
 	h.Set("From", "John Doe <john.doe@example.org>")
 	h.Set("To", "John Doe <john.doe@example.org>")
 
-	var encryptedHeader textproto.Header
-	encryptedHeader.Set("Content-Type", "text/plain")
-
-	var encryptedBody = "This is an encrypted message!\r\n"
+	var header textproto.Header
+	header.Set("Content-Type", "text/plain")
 
 	to := []string{"john.doe@example.org"}
 	from := "john.doe@example.org"
 
-	var buf bytes.Buffer
-	cleartext, err := Encrypt(&buf, h, to, from)
-	if err != nil {
-		t.Fatalf("Encrypt() = %v", err)
-	}
-
-	if err = textproto.WriteHeader(cleartext, encryptedHeader); err != nil {
-		t.Fatalf("textproto.WriteHeader() = %v", err)
-	}
-	if _, err = io.WriteString(cleartext, encryptedBody); err != nil {
-		t.Fatalf("io.WriteString() = %v", err)
-	}
-	if err = cleartext.Close(); err != nil {
-		t.Fatalf("ciphertext.Close() = %v", err)
+	var err error
+	for _, tc := range testCases {
+		var (
+			buf       bytes.Buffer
+			cleartext io.WriteCloser
+		)
+		switch tc.method {
+		case "encrypt":
+			cleartext, err = Encrypt(&buf, h, to, from)
+			if err != nil {
+				t.Fatalf("Encrypt() = %v", err)
+			}
+		case "sign":
+			cleartext, err = Sign(&buf, h, from)
+			if err != nil {
+				t.Fatalf("Encrypt() = %v", err)
+			}
+		}
+		if err = textproto.WriteHeader(cleartext, header); err != nil {
+			t.Fatalf("textproto.WriteHeader() = %v", err)
+		}
+		if _, err = io.WriteString(cleartext, tc.body); err != nil {
+			t.Fatalf("io.WriteString() = %v", err)
+		}
+		if err = cleartext.Close(); err != nil {
+			t.Fatalf("ciphertext.Close() = %v", err)
+		}
+		switch tc.method {
+		case "encrypt":
+			validateEncrypt(t, buf)
+		case "sign":
+			validateSign(t, buf)
+		}
 	}
+}
 
+func validateEncrypt(t *testing.T, buf bytes.Buffer) {
 	md, err := gpgbin.Decrypt(&buf)
 	if err != nil {
 		t.Errorf("Encrypt error: could not decrypt test encryption")
@@ -59,37 +96,7 @@ func TestEncrypt(t *testing.T) {
 	}
 }
 
-func TestSign(t *testing.T) {
-	initGPGtest(t)
-
-	importPublicKey()
-	importSecretKey()
-	var h textproto.Header
-	h.Set("From", "John Doe <john.doe@example.org>")
-	h.Set("To", "John Doe <john.doe@example.org>")
-
-	var signedHeader textproto.Header
-	signedHeader.Set("Content-Type", "text/plain")
-
-	var signedBody = "This is a signed message!\r\n"
-
-	var buf bytes.Buffer
-	cleartext, err := Sign(&buf, h, "john.doe@example.org")
-	if err != nil {
-		t.Fatalf("Encrypt() = %v", err)
-	}
-
-	if err = textproto.WriteHeader(cleartext, signedHeader); err != nil {
-		t.Fatalf("textproto.WriteHeader() = %v", err)
-	}
-	if _, err = io.WriteString(cleartext, signedBody); err != nil {
-		t.Fatalf("io.WriteString() = %v", err)
-	}
-
-	if err = cleartext.Close(); err != nil {
-		t.Fatalf("ciphertext.Close() = %v", err)
-	}
-
+func validateSign(t *testing.T, buf bytes.Buffer) {
 	parts := strings.Split(buf.String(), "\r\n--foo\r\n")
 	msg := strings.NewReader(parts[1])
 	sig := strings.NewReader(parts[2])
@@ -98,7 +105,7 @@ func TestSign(t *testing.T) {
 		t.Fatalf("gpg.Verify() = %v", err)
 	}
 
-	deepEqual(t, md, &wantSigned)
+	deepEqual(t, "Sign", md, &wantSigned)
 }
 
 var wantEncrypted = toCRLF(`Content-Type: text/plain