130 lines
3.5 KiB
Ruby
130 lines
3.5 KiB
Ruby
require 'spec_helper'
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describe Gitlab::Ci::Pipeline::Expression::Statement do
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subject do
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described_class.new(text, variables)
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end
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let(:variables) do
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{ 'PRESENT_VARIABLE' => 'my variable',
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EMPTY_VARIABLE: '' }
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end
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describe '.new' do
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context 'when variables are not provided' do
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it 'allows to properly initializes the statement' do
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statement = described_class.new('$PRESENT_VARIABLE')
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expect(statement.evaluate).to be_nil
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end
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end
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end
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describe '#parse_tree' do
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context 'when expression is empty' do
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let(:text) { '' }
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it 'raises an error' do
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expect { subject.parse_tree }
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.to raise_error described_class::StatementError
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end
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end
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context 'when expression grammar is incorrect' do
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table = [
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'$VAR "text"', # missing operator
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'== "123"', # invalid left side
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'"some string"', # only string provided
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'$VAR ==', # invalid right side
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'12345', # unknown syntax
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'' # empty statement
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]
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table.each do |syntax|
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context "when expression grammar is #{syntax.inspect}" do
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let(:text) { syntax }
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it 'aises a statement error exception' do
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expect { subject.parse_tree }
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.to raise_error described_class::StatementError
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end
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it 'is an invalid statement' do
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expect(subject).not_to be_valid
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end
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end
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end
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end
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context 'when expression grammar is correct' do
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context 'when using an operator' do
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let(:text) { '$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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it 'is a valid statement' do
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expect(subject).to be_valid
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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) { '$PRESENT_VARIABLE' }
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it 'returns a single token instance' do
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expect(subject.parse_tree)
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.to be_a Gitlab::Ci::Pipeline::Expression::Lexeme::Variable
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end
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end
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end
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end
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describe '#evaluate' do
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statements = [
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['$PRESENT_VARIABLE == "my variable"', true],
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["$PRESENT_VARIABLE == 'my variable'", true],
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['"my variable" == $PRESENT_VARIABLE', true],
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['$PRESENT_VARIABLE == null', false],
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['$EMPTY_VARIABLE == null', false],
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['"" == $EMPTY_VARIABLE', true],
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['$EMPTY_VARIABLE', ''],
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['$UNDEFINED_VARIABLE == null', true],
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['null == $UNDEFINED_VARIABLE', true],
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['$PRESENT_VARIABLE', 'my variable'],
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['$UNDEFINED_VARIABLE', nil]
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]
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statements.each do |expression, value|
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context "when using expression `#{expression}`" do
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let(:text) { expression }
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it "evaluates to `#{value.inspect}`" do
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expect(subject.evaluate).to eq value
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end
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end
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end
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end
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describe '#truthful?' do
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statements = [
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['$PRESENT_VARIABLE == "my variable"', true],
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["$PRESENT_VARIABLE == 'no match'", false],
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['$UNDEFINED_VARIABLE == null', true],
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['$PRESENT_VARIABLE', true],
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['$UNDEFINED_VARIABLE', false],
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['$EMPTY_VARIABLE', false]
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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 "returns `#{value.inspect}`" do
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expect(subject.truthful?).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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