1 files changed, 74 insertions, 0 deletions
diff --git a/spec/lib/gitlab/ci/build/rules/rule/clause/if_spec.rb b/spec/lib/gitlab/ci/build/rules/rule/clause/if_spec.rb
new file mode 100644
index 00000000000..81bce989833
--- /dev/null
+++ b/spec/lib/gitlab/ci/build/rules/rule/clause/if_spec.rb
@@ -0,0 +1,74 @@
+# frozen_string_literal: true
+
+require 'fast_spec_helper'
+require 'support/helpers/stubbed_feature'
+require 'support/helpers/stub_feature_flags'
+
+RSpec.describe Gitlab::Ci::Build::Rules::Rule::Clause::If do
+  include StubFeatureFlags
+
+  subject(:if_clause) { described_class.new(expression) }
+
+  describe '#satisfied_by?' do
+    let(:context_class) { Gitlab::Ci::Build::Context::Base }
+    let(:rules_context) { instance_double(context_class, variables_hash: {}) }
+
+    subject(:satisfied_by?) { if_clause.satisfied_by?(nil, rules_context) }
+
+    context 'when expression is a basic string comparison' do
+      context 'when comparison is true' do
+        let(:expression) { '"value" == "value"' }
+
+        it { is_expected.to eq(true) }
+      end
+
+      context 'when comparison is false' do
+        let(:expression) { '"value" == "other"' }
+
+        it { is_expected.to eq(false) }
+      end
+    end
+
+    context 'when expression is a regexp' do
+      context 'when comparison is true' do
+        let(:expression) { '"abcde" =~ /^ab.*/' }
+
+        it { is_expected.to eq(true) }
+      end
+
+      context 'when comparison is false' do
+        let(:expression) { '"abcde" =~ /^af.*/' }
+
+        it { is_expected.to eq(false) }
+      end
+
+      context 'when both side of the expression are variables' do
+        let(:expression) { '$teststring =~ $pattern' }
+
+        context 'when comparison is true' do
+          let(:rules_context) do
+            instance_double(context_class, variables_hash: { 'teststring' => 'abcde', 'pattern' => '/^ab.*/' })
+          end
+
+          it { is_expected.to eq(true) }
+
+          context 'when the FF ci_fix_rules_if_comparison_with_regexp_variable is disabled' do
+            before do
+              stub_feature_flags(ci_fix_rules_if_comparison_with_regexp_variable: false)
+            end
+
+            it { is_expected.to eq(false) }
+          end
+        end
+
+        context 'when comparison is false' do
+          let(:rules_context) do
+            instance_double(context_class, variables_hash: { 'teststring' => 'abcde', 'pattern' => '/^af.*/' })
+          end
+
+          it { is_expected.to eq(false) }
+        end
+      end
+    end
+  end
+end