1 files changed, 57 insertions, 7 deletions
diff --git a/spec/lib/gitlab/ci/variables/collection/item_spec.rb b/spec/lib/gitlab/ci/variables/collection/item_spec.rb
index e79f0a7f257..adb3ff4321f 100644
--- a/spec/lib/gitlab/ci/variables/collection/item_spec.rb
+++ b/spec/lib/gitlab/ci/variables/collection/item_spec.rb
@@ -1,19 +1,69 @@
 require 'spec_helper'
 
 describe Gitlab::Ci::Variables::Collection::Item do
+  let(:variable_key) { 'VAR' }
+  let(:variable_value) { 'something' }
+  let(:expected_value) { variable_value }
+
   let(:variable) do
-    { key: 'VAR', value: 'something', public: true }
+    { key: variable_key, value: variable_value, public: true }
   end
 
   describe '.new' do
-    it 'raises error if unknown key i specified' do
-      expect { described_class.new(key: 'VAR', value: 'abc', files: true) }
-        .to raise_error ArgumentError, 'unknown keyword: files'
+    context 'when unknown keyword is specified' do
+      it 'raises error' do
+        expect { described_class.new(key: variable_key, value: 'abc', files: true) }
+          .to raise_error ArgumentError, 'unknown keyword: files'
+      end
+    end
+
+    context 'when required keywords are not specified' do
+      it 'raises error' do
+        expect { described_class.new(key: variable_key) }
+          .to raise_error ArgumentError, 'missing keyword: value'
+      end
     end
 
-    it 'raises error when required keywords are not specified' do
-      expect { described_class.new(key: 'VAR') }
-        .to raise_error ArgumentError, 'missing keyword: value'
+    shared_examples 'creates variable' do
+      subject { described_class.new(key: variable_key, value: variable_value) }
+
+      it 'saves given value' do
+        expect(subject[:key]).to eq variable_key
+        expect(subject[:value]).to eq expected_value
+      end
+    end
+
+    shared_examples 'raises error for invalid type' do
+      it do
+        expect { described_class.new(key: variable_key, value: variable_value) }
+          .to raise_error ArgumentError, /`value` must be of type String, while it was:/
+      end
+    end
+
+    it_behaves_like 'creates variable'
+
+    context "when it's nil" do
+      let(:variable_value) { nil }
+      let(:expected_value) { nil }
+
+      it_behaves_like 'creates variable'
+    end
+
+    context "when it's an empty string" do
+      let(:variable_value) { '' }
+      let(:expected_value) { '' }
+
+      it_behaves_like 'creates variable'
+    end
+
+    context 'when provided value is not a string' do
+      [1, false, [], {}, Object.new].each do |val|
+        context "when it's #{val}" do
+          let(:variable_value) { val }
+
+          it_behaves_like 'raises error for invalid type'
+        end
+      end
     end
   end