1 files changed, 27 insertions, 0 deletions
diff --git a/spec/lib/ci/mask_secret_spec.rb b/spec/lib/ci/mask_secret_spec.rb
new file mode 100644
index 00000000000..3101bed20fb
--- /dev/null
+++ b/spec/lib/ci/mask_secret_spec.rb
@@ -0,0 +1,27 @@
+require 'spec_helper'
+
+describe Ci::MaskSecret, lib: true do
+  subject { described_class }
+
+  describe '#mask' do
+    it 'masks exact number of characters' do
+      expect(mask('token', 'oke')).to eq('txxxn')
+    end
+
+    it 'masks multiple occurrences' do
+      expect(mask('token token token', 'oke')).to eq('txxxn txxxn txxxn')
+    end
+
+    it 'does not mask if not found' do
+      expect(mask('token', 'not')).to eq('token')
+    end
+
+    it 'does support null token' do
+      expect(mask('token', nil)).to eq('token')
+    end
+
+    def mask(value, token)
+      subject.mask!(value.dup, token)
+    end
+  end
+end