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# frozen_string_literal: true
RSpec.describe 'database usage' do
it 'saves a minimal failing example' do
expect do
hypothesis do
n = any integer
expect(n).to be < 10
end
end.to raise_exception(RSpec::Expectations::ExpectationNotMetError)
saved = Dir.glob("#{Hypothesis::DEFAULT_DATABASE_PATH}/*/*")
expect(saved.length).to be == 1
end
it 'can be disabled' do
expect do
hypothesis(database: false) do
n = any integer
expect(n).to be < 10
end
end.to raise_exception(RSpec::Expectations::ExpectationNotMetError)
expect(File.exist?(Hypothesis::DEFAULT_DATABASE_PATH)).to be false
end
it 'replays a previously failing example' do
# This is a very unlikely value to be hit on by random. The first
# time we run the test we fail for any value larger than it.
# This then shrinks to exactly equal to magic. The second time we
# run the test we only fail in this exact magic value. This
# demonstrates replay from the previous test is working.
magic = 17_658
expect do
hypothesis do
n = any integer
expect(n).to be < magic
end
end.to raise_exception(RSpec::Expectations::ExpectationNotMetError)
expect do
hypothesis do
n = any integer
expect(n).not_to be == magic
end
end.to raise_exception(RSpec::Expectations::ExpectationNotMetError)
end
it 'cleans out passing examples' do
expect do
hypothesis do
n = any integer
expect(n).to be < 10
end
end.to raise_exception(RSpec::Expectations::ExpectationNotMetError)
saved = Dir.glob("#{Hypothesis::DEFAULT_DATABASE_PATH}/*/*")
expect(saved.length).to be == 1
hypothesis do
any integer
end
saved = Dir.glob("#{Hypothesis::DEFAULT_DATABASE_PATH}/*/*")
expect(saved.length).to be == 0
end
end
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