1 files changed, 78 insertions, 0 deletions
diff --git a/spec/lib/gitlab/web_ide/config_spec.rb b/spec/lib/gitlab/web_ide/config_spec.rb
new file mode 100644
index 00000000000..c1dafd01197
--- /dev/null
+++ b/spec/lib/gitlab/web_ide/config_spec.rb
@@ -0,0 +1,78 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe Gitlab::WebIde::Config do
+  let(:config) do
+    described_class.new(yml)
+  end
+
+  context 'when config is valid' do
+    let(:yml) do
+      <<-EOS
+        terminal:
+          image: ruby:2.7
+          before_script:
+            - gem install rspec
+      EOS
+    end
+
+    describe '#to_hash' do
+      it 'returns hash created from string' do
+        hash = {
+          terminal: {
+            image: 'ruby:2.7',
+            before_script: ['gem install rspec']
+          }
+        }
+
+        expect(config.to_hash).to eq hash
+      end
+
+      describe '#valid?' do
+        it 'is valid' do
+          expect(config).to be_valid
+        end
+
+        it 'has no errors' do
+          expect(config.errors).to be_empty
+        end
+      end
+    end
+  end
+
+  context 'when config is invalid' do
+    context 'when yml is incorrect' do
+      let(:yml) { '// invalid' }
+
+      describe '.new' do
+        it 'raises error' do
+          expect { config }.to raise_error(
+            described_class::ConfigError,
+            /Invalid configuration format/
+          )
+        end
+      end
+    end
+
+    context 'when config logic is incorrect' do
+      let(:yml) { 'terminal: { before_script: "ls" }' }
+
+      describe '#valid?' do
+        it 'is not valid' do
+          expect(config).not_to be_valid
+        end
+
+        it 'has errors' do
+          expect(config.errors).not_to be_empty
+        end
+      end
+
+      describe '#errors' do
+        it 'returns an array of strings' do
+          expect(config.errors).to all(be_an_instance_of(String))
+        end
+      end
+    end
+  end
+end