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# frozen_string_literal: true
RSpec.describe Dry::Logic::Operations::Key do
subject(:operation) { described_class.new(predicate, name: :user) }
include_context "predicates"
let(:predicate) do
Dry::Logic::Rule::Predicate.build(key?).curry(:age)
end
describe "#call" do
context "with a plain predicate" do
it "returns a success for valid input" do
expect(operation.(user: {age: 18})).to be_success
end
it "returns a failure for invalid input" do
result = operation.(user: {})
expect(result).to be_failure
expect(result.to_ast).to eql(
[:failure, [:user, [:key, [:user,
[:predicate, [:key?, [[:name, :age], [:input, {}]]]]]]]]
)
end
end
context "with a set rule as predicate" do
subject(:operation) do
described_class.new(predicate, name: :address)
end
let(:predicate) do
Dry::Logic::Operations::Set.new(
Dry::Logic::Rule::Predicate.build(key?).curry(:city),
Dry::Logic::Rule::Predicate.build(key?).curry(:zipcode)
)
end
it "applies set rule to the value that passes" do
result = operation.(address: {city: "NYC", zipcode: "123"})
expect(result).to be_success
end
it "applies set rule to the value that fails" do
result = operation.(address: {city: "NYC"})
expect(result).to be_failure
expect(result.to_ast).to eql(
[:failure, [:address, [:key, [:address, [:set, [
[:predicate, [:key?, [[:name, :zipcode], [:input, {city: "NYC"}]]]]
]]]]]]
)
end
end
context "with an each rule as predicate" do
subject(:operation) do
described_class.new(predicate, name: :nums)
end
let(:predicate) do
Dry::Logic::Operations::Each.new(Dry::Logic::Rule::Predicate.build(str?))
end
it "applies each rule to the value that passses" do
result = operation.(nums: %w[1 2 3])
expect(result).to be_success
end
it "applies each rule to the value that fails" do
failure = operation.(nums: [1, "3", 3])
expect(failure).to be_failure
expect(failure.to_ast).to eql(
[:failure, [:nums, [:key, [:nums, [:set, [
[:key, [0, [:predicate, [:str?, [[:input, 1]]]]]],
[:key, [2, [:predicate, [:str?, [[:input, 3]]]]]]
]]]]]]
)
end
end
end
describe "#to_ast" do
it "returns ast" do
expect(operation.to_ast).to eql(
[:key, [:user, [:predicate, [:key?, [[:name, :age], [:input, undefined]]]]]]
)
end
end
describe "#ast" do
it "returns ast without the input" do
expect(operation.ast).to eql(
[:key, [:user, [:predicate, [:key?, [[:name, :age], [:input, undefined]]]]]]
)
end
it "returns ast with the input" do
expect(operation.ast(user: "jane")).to eql(
[:key, [:user, [:predicate, [:key?, [[:name, :age], [:input, "jane"]]]]]]
)
end
end
describe "#and" do
subject(:operation) do
described_class.new(Dry::Logic::Rule::Predicate.build(str?), name: [:user, :name])
end
let(:other) do
described_class.new(Dry::Logic::Rule::Predicate.build(filled?), name: [:user, :name])
end
it "returns and rule where value is passed to the right" do
present_and_string = operation.and(other)
expect(present_and_string.(user: {name: "Jane"})).to be_success
expect(present_and_string.(user: {})).to be_failure
expect(present_and_string.(user: {name: 1})).to be_failure
end
end
describe "#to_s" do
it "returns string representation" do
expect(operation.to_s).to eql("key[user](key?(:age))")
end
end
end
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