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This patch aims to improve the steps inspector output: - The service class name is displayed at the top. - Next to each step is displayed the time it took to run said step. - Steps that didn’t run are hidden. - `#inspect` automatically outputs the error when it is present.
340 lines
8.9 KiB
Ruby
340 lines
8.9 KiB
Ruby
# frozen_string_literal: true
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RSpec.describe Service::StepsInspector do
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class DummyService
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include Service::Base
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options do
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attribute :my_option, :boolean, default: true
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attribute :my_other_option, :integer, default: 1
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end
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model :model
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policy :policy
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params do
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attribute :parameter
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validates :parameter, presence: true
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end
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transaction do
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step :in_transaction_step_1
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step :in_transaction_step_2
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end
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try { step :might_raise }
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step :final_step
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end
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subject(:inspector) { described_class.new(result) }
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let(:parameter) { "present" }
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let(:result) { DummyService.call(params: { parameter: parameter }) }
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before do
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class DummyService
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%i[
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fetch_model
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policy
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in_transaction_step_1
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in_transaction_step_2
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might_raise
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final_step
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].each { |name| define_method(name) { true } }
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end
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end
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describe "#execution_flow" do
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subject(:output) { inspector.execution_flow.strip.gsub(%r{ \(\d+\.\d+ ms\)}, "") }
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context "when service runs without error" do
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it "outputs all the steps of the service" do
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expect(output).to eq <<~OUTPUT.chomp
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[ 1/10] [options] default ✅
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[ 2/10] [model] model ✅
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[ 3/10] [policy] policy ✅
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[ 4/10] [params] default ✅
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[ 5/10] [transaction]
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[ 6/10] [step] in_transaction_step_1 ✅
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[ 7/10] [step] in_transaction_step_2 ✅
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[ 8/10] [try]
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[ 9/10] [step] might_raise ✅
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[10/10] [step] final_step ✅
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OUTPUT
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end
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it "outputs time taken by each step" do
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expect(inspector.execution_flow).to match(/\d+\.\d+ ms/)
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end
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end
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context "when the model step is failing" do
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before do
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class DummyService
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def fetch_model
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false
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end
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end
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end
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it "shows the failing step" do
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expect(output).to eq <<~OUTPUT.chomp
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[ 1/10] [options] default ✅
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[ 2/10] [model] model ❌
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(8 more steps not shown as the execution flow was stopped before reaching them)
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OUTPUT
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end
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end
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context "when the policy step is failing" do
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before do
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class DummyService
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def policy
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false
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end
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end
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end
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it "shows the failing step" do
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expect(output).to eq <<~OUTPUT.chomp
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[ 1/10] [options] default ✅
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[ 2/10] [model] model ✅
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[ 3/10] [policy] policy ❌
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(7 more steps not shown as the execution flow was stopped before reaching them)
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OUTPUT
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end
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end
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context "when the params step is failing" do
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let(:parameter) { nil }
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it "shows the failing step" do
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expect(output).to eq <<~OUTPUT.chomp
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[ 1/10] [options] default ✅
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[ 2/10] [model] model ✅
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[ 3/10] [policy] policy ✅
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[ 4/10] [params] default ❌
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(6 more steps not shown as the execution flow was stopped before reaching them)
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OUTPUT
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end
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end
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context "when a common step is failing" do
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before do
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class DummyService
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def in_transaction_step_2
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fail!("step error")
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end
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end
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end
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it "shows the failing step" do
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expect(output).to eq <<~OUTPUT.chomp
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[ 1/10] [options] default ✅
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[ 2/10] [model] model ✅
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[ 3/10] [policy] policy ✅
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[ 4/10] [params] default ✅
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[ 5/10] [transaction]
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[ 6/10] [step] in_transaction_step_1 ✅
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[ 7/10] [step] in_transaction_step_2 ❌
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(3 more steps not shown as the execution flow was stopped before reaching them)
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OUTPUT
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end
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end
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context "when a step raises an exception inside the 'try' block" do
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before do
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class DummyService
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def might_raise
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raise "BOOM"
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end
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end
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end
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it "shows the failing step" do
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expect(output).to eq <<~OUTPUT.chomp
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[ 1/10] [options] default ✅
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[ 2/10] [model] model ✅
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[ 3/10] [policy] policy ✅
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[ 4/10] [params] default ✅
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[ 5/10] [transaction]
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[ 6/10] [step] in_transaction_step_1 ✅
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[ 7/10] [step] in_transaction_step_2 ✅
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[ 8/10] [try]
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[ 9/10] [step] might_raise 💥
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(1 more steps not shown as the execution flow was stopped before reaching them)
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OUTPUT
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end
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end
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context "when running in specs" do
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context "when a successful step is flagged as being an unexpected result" do
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before { result["result.policy.policy"]["spec.unexpected_result"] = true }
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it "adapts its output accordingly" do
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expect(output).to eq <<~OUTPUT.chomp
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[ 1/10] [options] default ✅
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[ 2/10] [model] model ✅
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[ 3/10] [policy] policy ✅ ⚠️ <= expected to return false but got true instead
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[ 4/10] [params] default ✅
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[ 5/10] [transaction]
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[ 6/10] [step] in_transaction_step_1 ✅
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[ 7/10] [step] in_transaction_step_2 ✅
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[ 8/10] [try]
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[ 9/10] [step] might_raise ✅
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[10/10] [step] final_step ✅
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OUTPUT
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end
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end
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context "when a failing step is flagged as being an unexpected result" do
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before do
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class DummyService
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def policy
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false
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end
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end
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result["result.policy.policy"]["spec.unexpected_result"] = true
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end
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it "adapts its output accordingly" do
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expect(output).to eq <<~OUTPUT.chomp
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[ 1/10] [options] default ✅
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[ 2/10] [model] model ✅
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[ 3/10] [policy] policy ❌ ⚠️ <= expected to return true but got false instead
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(7 more steps not shown as the execution flow was stopped before reaching them)
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OUTPUT
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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 "#error" do
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subject(:error) { inspector.error }
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context "when there are no errors" do
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it "returns nothing" do
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expect(error).to be_blank
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end
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end
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context "when the model step is failing" do
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context "when the model is missing" do
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before do
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class DummyService
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def fetch_model
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false
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end
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end
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end
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it "returns an error related to the model" do
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expect(error).to match(/Model not found/)
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end
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end
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context "when the model has errors" do
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before do
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class DummyService
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def fetch_model
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OpenStruct.new(invalid?: true, errors: ActiveModel::Errors.new(nil))
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end
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end
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end
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it "returns an error related to the model" do
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expect(error).to match(/ActiveModel::Errors \[\]/)
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end
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end
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end
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context "when the params step is failing" do
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let(:parameter) { nil }
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it "returns an error related to the contract" do
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expect(error).to match(/ActiveModel::Error attribute=parameter, type=blank, options={}/)
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end
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it "returns the provided paramaters" do
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expect(error).to match(/{"parameter"=>nil}/)
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end
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end
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context "when the policy step is failing" do
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before do
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class DummyService
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def policy
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false
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end
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end
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end
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context "when there is no reason provided" do
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it "returns nothing" do
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expect(error).to be_blank
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end
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end
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context "when a reason is provided" do
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before { result["result.policy.policy"][:reason] = "failed" }
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it "returns the reason" do
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expect(error).to eq "failed"
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end
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end
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end
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context "when a common step is failing" do
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before { result["result.step.final_step"].fail(error: "my error") }
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it "returns an error related to the step" do
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expect(error).to eq("my error")
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end
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end
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context "when an exception occurred inside the 'try' block" do
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before do
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class DummyService
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def might_raise
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raise "BOOM"
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end
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end
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end
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it "returns an error related to the exception" do
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expect(error).to match(/BOOM \([^(]*RuntimeError[^)]*\)/)
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end
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end
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end
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describe "#inspect" do
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let(:parameter) { nil }
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it "outputs the service class name, the steps results and the specific error" do
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expect(inspector.inspect.gsub(%r{ \(\d+\.\d+ ms\)}, "")).to eq(<<~OUTPUT)
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Inspecting DummyService result object:
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[ 1/10] [options] default ✅
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[ 2/10] [model] model ✅
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[ 3/10] [policy] policy ✅
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[ 4/10] [params] default ❌
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(6 more steps not shown as the execution flow was stopped before reaching them)
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Why it failed:
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#<ActiveModel::Errors [#<ActiveModel::Error attribute=parameter, type=blank, options={}>]>
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Provided parameters: {"parameter"=>nil}
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OUTPUT
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end
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end
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end
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