1 files changed, 18 insertions, 0 deletions
diff --git a/qa/spec/runtime/key/ecdsa_spec.rb b/qa/spec/runtime/key/ecdsa_spec.rb
new file mode 100644
index 00000000000..8951e82b9bb
--- /dev/null
+++ b/qa/spec/runtime/key/ecdsa_spec.rb
@@ -0,0 +1,18 @@
+describe QA::Runtime::Key::ECDSA do
+  describe '#public_key' do
+    [256, 384, 521].each do |bits|
+      it "generates a public #{bits}-bits ECDSA key" do
+        subject = described_class.new(bits).public_key
+
+        expect(subject).to match(%r{\Aecdsa\-sha2\-\w+ AAAA[0-9A-Za-z+/]+={0,3}})
+      end
+    end
+  end
+
+  describe '#new' do
+    it 'does not support arbitrary bits' do
+      expect { described_class.new(123) }
+        .to raise_error(QA::Service::Shellout::CommandError)
+    end
+  end
+end