Add missing specs for pipeline expression lexemes

lib/gitlab/ci/pipeline/expression/lexeme/equals.rb

@@ -11,7 +11,7 @@ module Gitlab
               @right = right
             end
 
-            def evaluate(variables)
+            def evaluate(**variables)
               @left.evaluate(variables) == @right.evaluate(variables)
             end
 

lib/gitlab/ci/pipeline/expression/lexeme/null.rb

@@ -10,7 +10,7 @@ module Gitlab
               @value = value
             end
 
-            def evaluate(_)
+            def evaluate(**_)
               nil
             end
 

lib/gitlab/ci/pipeline/expression/lexeme/string.rb

@@ -10,7 +10,7 @@ module Gitlab
               @value = value
             end
 
-            def evaluate(_)
+            def evaluate(**_)
               @value.to_s
             end
 

lib/gitlab/ci/pipeline/expression/lexeme/variable.rb

@@ -10,8 +10,8 @@ module Gitlab
               @name = name
             end
 
-            def evaluate(variables)
-              variables[@name]
+            def evaluate(**variables)
+              variables[@name.to_sym]
             end
 
             def self.build(string)

lib/gitlab/ci/pipeline/expression/statement.rb

@@ -18,7 +18,7 @@ module Gitlab
             @lexer = Expression::Lexer.new(statement)
 
             @variables = pipeline.variables.map do |variable|
-              [variable.key, variable.value]
+              [variable.key.to_sym, variable.value]
             end
           end
 

spec/lib/gitlab/ci/pipeline/expression/lexeme/equals_spec.rb

@@ -0,0 +1,39 @@
+require 'spec_helper'
+
+describe Gitlab::Ci::Pipeline::Expression::Lexeme::Equals do
+  let(:left) { double('left') }
+  let(:right) { double('right') }
+
+  describe '.build' do
+    it 'creates a new instance of the token' do
+      expect(described_class.build('==', left, right))
+        .to be_a(described_class)
+    end
+  end
+
+  describe '.type' do
+    it 'is an operator' do
+      expect(described_class.type).to eq :operator
+    end
+  end
+
+  describe '#evaluate' do
+    it 'returns false when left and right are not equal' do
+      allow(left).to receive(:evaluate).and_return(1)
+      allow(right).to receive(:evaluate).and_return(2)
+
+      operator = described_class.new(left, right)
+
+      expect(operator.evaluate(VARIABLE: 3)).to eq false
+    end
+
+    it 'returns true when left and right are equal' do
+      allow(left).to receive(:evaluate).and_return(1)
+      allow(right).to receive(:evaluate).and_return(1)
+
+      operator = described_class.new(left, right)
+
+      expect(operator.evaluate(VARIABLE: 3)).to eq true
+    end
+  end
+end

spec/lib/gitlab/ci/pipeline/expression/lexeme/null_spec.rb

@@ -0,0 +1,22 @@
+require 'spec_helper'
+
+describe Gitlab::Ci::Pipeline::Expression::Lexeme::Null do
+  describe '.build' do
+    it 'creates a new instance of the token' do
+      expect(described_class.build('null'))
+        .to be_a(described_class)
+    end
+  end
+
+  describe '.type' do
+    it 'is a value lexeme' do
+      expect(described_class.type).to eq :value
+    end
+  end
+
+  describe '#evaluate' do
+    it 'always evaluates to `nil`' do
+      expect(described_class.new('null').evaluate).to be_nil
+    end
+  end
+end

spec/lib/gitlab/ci/pipeline/expression/lexeme/string_spec.rb

@@ -0,0 +1,30 @@
+require 'spec_helper'
+
+describe Gitlab::Ci::Pipeline::Expression::Lexeme::String do
+  describe '.build' do
+    it 'creates a new instance of the token' do
+      expect(described_class.build('"my string"'))
+        .to be_a(described_class)
+    end
+  end
+
+  describe '.type' do
+    it 'is a value lexeme' do
+      expect(described_class.type).to eq :value
+    end
+  end
+
+  describe '#evaluate' do
+    it 'returns string value it is is present' do
+      string = described_class.new('my string')
+
+      expect(string.evaluate).to eq 'my string'
+    end
+
+    it 'returns an empty string if it is empty' do
+      string = described_class.new('')
+
+      expect(string.evaluate).to eq ''
+    end
+  end
+end

spec/lib/gitlab/ci/pipeline/expression/lexeme/variable_spec.rb

@@ -0,0 +1,37 @@
+require 'spec_helper'
+
+describe Gitlab::Ci::Pipeline::Expression::Lexeme::Variable do
+  describe '.build' do
+    it 'creates a new instance of the token' do
+      expect(described_class.build('$VARIABLE'))
+        .to be_a(described_class)
+    end
+  end
+
+  describe '.type' do
+    it 'is a value lexeme' do
+      expect(described_class.type).to eq :value
+    end
+  end
+
+  describe '#evaluate' do
+    it 'returns variable value if it is defined' do
+      variable = described_class.new('VARIABLE')
+
+      expect(variable.evaluate(VARIABLE: 'my variable'))
+        .to eq 'my variable'
+    end
+
+    it 'returns nil if it is not defined' do
+      variable = described_class.new('VARIABLE')
+
+      expect(variable.evaluate(OTHER: 'variable')).to be_nil
+    end
+
+    it 'returns an empty string if it is empty' do
+      variable = described_class.new('VARIABLE')
+
+      expect(variable.evaluate(VARIABLE: '')).to eq ''
+    end
+  end
+end

spec/lib/gitlab/ci/pipeline/expression/statement_spec.rb

@@ -69,7 +69,7 @@ describe Gitlab::Ci::Pipeline::Expression::Statement do
       ['$VAR == null', true],
       ['null == $VAR', true],
       ['$VARIABLE', 'my variable'],
-      ['$VAR', nil],
+      ['$VAR', nil]
     ]
 
     statements.each do |expression, value|