1 files changed, 99 insertions, 0 deletions
diff --git a/client/client_test.go b/client/client_test.go
new file mode 100644
index 0000000..b0305b4
--- /dev/null
+++ b/client/client_test.go
@@ -0,0 +1,99 @@
+// Copyright 2022 Google LLC.
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// The tests in this file launches a mock signer binary "signer.go".
+package client
+
+import (
+	"bytes"
+	"crypto"
+	"errors"
+	"testing"
+)
+
+func TestClient_Cred_Success(t *testing.T) {
+	_, err := Cred("testdata/certificate_config.json")
+	if err != nil {
+		t.Errorf("Cred: got %v, want nil err", err)
+	}
+}
+
+func TestClient_Cred_ConfigMissing(t *testing.T) {
+	_, err := Cred("missing.json")
+	if got, want := err, ErrCredUnavailable; !errors.Is(got, want) {
+		t.Errorf("Cred: with missing config; got %v, want %v err", got, want)
+	}
+}
+
+func TestClient_Cred_PathMissing(t *testing.T) {
+	_, err := Cred("testdata/certificate_config_missing_path.json")
+	if got, want := err, ErrCredUnavailable; !errors.Is(got, want) {
+		t.Errorf("Cred: with missing ECP path; got %v, want %v err", got, want)
+	}
+}
+
+func TestClient_Public(t *testing.T) {
+	key, err := Cred("testdata/certificate_config.json")
+	if err != nil {
+		t.Fatal(err)
+	}
+	if key.Public() == nil {
+		t.Error("Public: got nil, want non-nil Public Key")
+	}
+}
+
+func TestClient_CertificateChain(t *testing.T) {
+	key, err := Cred("testdata/certificate_config.json")
+	if err != nil {
+		t.Fatal(err)
+	}
+	if key.CertificateChain() == nil {
+		t.Error("CertificateChain: got nil, want non-nil Certificate Chain")
+	}
+}
+
+func TestClient_Sign(t *testing.T) {
+	key, err := Cred("testdata/certificate_config.json")
+	if err != nil {
+		t.Fatal(err)
+	}
+	signed, err := key.Sign(nil, []byte("testDigest"), nil)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if got, want := signed, []byte("testDigest"); !bytes.Equal(got, want) {
+		t.Errorf("Sign: got %c, want %c", got, want)
+	}
+}
+
+func TestClient_Sign_HashSizeMismatch(t *testing.T) {
+	key, err := Cred("testdata/certificate_config.json")
+	if err != nil {
+		t.Fatal(err)
+	}
+	_, err = key.Sign(nil, []byte("testDigest"), crypto.SHA256)
+	if got, want := err.Error(), "Digest length of 10 bytes does not match Hash function size of 32 bytes"; got != want {
+		t.Errorf("Sign: got err %v, want err %v", got, want)
+	}
+}
+
+func TestClient_Close(t *testing.T) {
+	key, err := Cred("testdata/certificate_config.json")
+	if err != nil {
+		t.Fatal(err)
+	}
+	err = key.Close()
+	if err != nil {
+		t.Errorf("Close: got %v, want nil err", err)
+	}
+}