149 lines
4.2 KiB
Ruby
149 lines
4.2 KiB
Ruby
require 'fast_spec_helper'
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require 'rspec-parameterized'
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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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'$VAR ==', # invalid right side
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'null', # missing lexemes
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'' # empty statement
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]
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table.each do |syntax|
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context "when expression grammar is #{syntax.inspect}" do
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let(:text) { syntax }
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it 'raises a statement error exception' do
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expect { subject.parse_tree }
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.to raise_error described_class::StatementError
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end
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it 'is an invalid statement' do
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expect(subject).not_to be_valid
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end
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end
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end
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end
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context 'when expression grammar is correct' do
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context 'when using an operator' do
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let(:text) { '$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) { '$PRESENT_VARIABLE' }
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it 'returns a single token instance' do
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expect(subject.parse_tree)
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.to be_a Gitlab::Ci::Pipeline::Expression::Lexeme::Variable
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end
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end
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end
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end
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describe '#evaluate' do
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using RSpec::Parameterized::TableSyntax
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where(:expression, :value) do
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'$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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'$UNDEFINED_VARIABLE' | nil
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"$PRESENT_VARIABLE =~ /var.*e$/" | true
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"$PRESENT_VARIABLE =~ /^var.*/" | false
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"$EMPTY_VARIABLE =~ /var.*/" | false
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"$UNDEFINED_VARIABLE =~ /var.*/" | false
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"$PRESENT_VARIABLE =~ /VAR.*/i" | true
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end
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with_them do
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let(:text) { expression }
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it "evaluates to `#{params[:value].inspect}`" do
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expect(subject.evaluate).to eq value
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end
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end
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end
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describe '#truthful?' do
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using RSpec::Parameterized::TableSyntax
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where(:expression, :value) do
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'$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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'$EMPTY_VARIABLE' | false
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'$INVALID = 1' | false
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"$PRESENT_VARIABLE =~ /var.*/" | true
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"$UNDEFINED_VARIABLE =~ /var.*/" | false
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end
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with_them do
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let(:text) { expression }
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it "returns `#{params[: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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context 'when evaluating expression raises an error' do
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let(:text) { '$PRESENT_VARIABLE' }
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it 'returns false' do
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allow(subject).to receive(:evaluate)
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.and_raise(described_class::StatementError)
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expect(subject.truthful?).to be_falsey
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end
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end
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end
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end
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