Add test for NewMJwtVerifierFromFile

mjwt_test.go

@@ -12,7 +12,7 @@ import (
 type testClaims struct{ TestValue string }
 
 func (t testClaims) Valid() error {
-	if t.TestValue != "hello" {
+	if t.TestValue != "hello" && t.TestValue != "world" {
 		return fmt.Errorf("TestValue should be hello")
 	}
 	return nil

verifier.go

@@ -5,13 +5,10 @@ import (
 	"crypto/x509"
 	"encoding/pem"
 	"github.com/golang-jwt/jwt/v4"
-	"github.com/pkg/errors"
 	"os"
 )
 
-var ErrCannotGenerateMJwtToken = errors.New("cannot generate mjwt token with verifier")
-
-// defaultMJwtVerifier implements Verifier and uses an rsa.PublicKey to validate
+// defaultMJwtVerifier implements Verifier and uses a rsa.PublicKey to validate
 // MJWT tokens
 type defaultMJwtVerifier struct {
 	pub *rsa.PublicKey

verifier_test.go

@@ -0,0 +1,33 @@
+package mjwt
+
+import (
+	"crypto/rand"
+	"crypto/rsa"
+	"crypto/x509"
+	"encoding/pem"
+	"github.com/stretchr/testify/assert"
+	"os"
+	"testing"
+	"time"
+)
+
+func TestNewMJwtVerifierFromFile(t *testing.T) {
+	key, err := rsa.GenerateKey(rand.Reader, 2048)
+	assert.NoError(t, err)
+
+	s := NewMJwtSigner("mjwt.test", key)
+	token, err := s.GenerateJwt("1", "test", 10*time.Minute, testClaims{TestValue: "world"})
+	assert.NoError(t, err)
+
+	b := pem.EncodeToMemory(&pem.Block{Type: "RSA PUBLIC KEY", Bytes: x509.MarshalPKCS1PublicKey(&key.PublicKey)})
+	temp, err := os.CreateTemp("", "this-is-a-test-file.pem")
+	assert.NoError(t, err)
+	_, err = temp.Write(b)
+	assert.NoError(t, err)
+	file, err := NewMJwtVerifierFromFile(temp.Name())
+	assert.NoError(t, err)
+	_, _, err = ExtractClaims[testClaims](file, token)
+	assert.NoError(t, err)
+	err = os.Remove(temp.Name())
+	assert.NoError(t, err)
+}