86 lines
2.3 KiB
Ruby
86 lines
2.3 KiB
Ruby
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require 'spec_helper'
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describe Gitlab::Ci::Pipeline::Expression::Statement do
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let(:pipeline) { build(:ci_pipeline) }
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subject do
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described_class.new(text, pipeline)
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end
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before do
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pipeline.variables.build([key: 'VARIABLE', value: 'my variable'])
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end
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describe '#parse_tree' do
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context 'when expression is empty' do
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let(:text) { '' }
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it 'raises an error' do
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expect { subject.parse_tree }
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.to raise_error described_class::StatementError
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end
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end
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context 'when expression grammar is incorrect' do
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table = [
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'$VAR "text"', # missing operator
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'== "123"', # invalid right side
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"'single quotes'", # single quotes string
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'$VAR ==', # invalid right side
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'12345', # unknown syntax
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'' # empty statement
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]
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table.each do |syntax|
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it "raises an error when syntax is `#{syntax}`" do
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expect { described_class.new(syntax, pipeline).parse_tree }
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.to raise_error described_class::StatementError
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end
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end
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end
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context 'when expression grammar is correct' do
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context 'when using an operator' do
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let(:text) { '$VAR == "value"' }
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it 'returns a reverse descent parse tree' do
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expect(subject.parse_tree)
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.to be_a Gitlab::Ci::Pipeline::Expression::Lexeme::Equals
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end
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end
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context 'when using a single token' do
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let(:text) { '$VARIABLE' }
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it 'returns a single token instance' do
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expect(subject.parse_tree)
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.to be_a Gitlab::Ci::Pipeline::Expression::Lexeme::Variable
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end
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end
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end
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end
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describe '#evaluate' do
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statements = [
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['$VARIABLE == "my variable"', true],
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["$VARIABLE == 'my variable'", true],
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['"my variable" == $VARIABLE', true],
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['$VARIABLE == null', false],
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['$VAR == null', true],
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['null == $VAR', true],
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['$VARIABLE', 'my variable'],
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['$VAR', nil]
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]
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statements.each do |expression, value|
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context "when using expression `#{expression}`" do
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let(:text) { expression }
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it "evaluates to `#{value.inspect}`" do
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expect(subject.evaluate).to eq value
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end
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end
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end
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end
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end
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