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# frozen_string_literal: true
# Released under the MIT License.
# Copyright, 2019-2024, by Samuel Williams.
require "protocol/http/middleware"
require "protocol/http/middleware/builder"
require "tempfile"
describe Protocol::HTTP::Middleware::Builder do
it "can make an app" do
app = Protocol::HTTP::Middleware.build do
run Protocol::HTTP::Middleware::HelloWorld
end
expect(app).to be_equal(Protocol::HTTP::Middleware::HelloWorld)
end
it "defaults to not found" do
app = Protocol::HTTP::Middleware.build do
end
expect(app).to be_equal(Protocol::HTTP::Middleware::NotFound)
end
it "can instantiate middleware" do
app = Protocol::HTTP::Middleware.build do
use Protocol::HTTP::Middleware
end
expect(app).to be_a(Protocol::HTTP::Middleware)
end
it "provides the builder as an argument" do
current_self = self
app = Protocol::HTTP::Middleware.build do |builder|
builder.use Protocol::HTTP::Middleware
expect(self).to be_equal(current_self)
end
expect(app).to be_a(Protocol::HTTP::Middleware)
end
it "can initialize with custom default app" do
builder = Protocol::HTTP::Middleware::Builder.new(Protocol::HTTP::Middleware::Okay)
expect(builder.to_app).to be_equal(Protocol::HTTP::Middleware::Okay)
end
it "can build without block" do
builder = Protocol::HTTP::Middleware::Builder.new
result = builder.build
expect(result).to be_equal(builder)
expect(builder.to_app).to be_equal(Protocol::HTTP::Middleware::NotFound)
end
it "can build with zero-arity block using instance_exec" do
builder = Protocol::HTTP::Middleware::Builder.new
builder.build do
use Protocol::HTTP::Middleware
end
expect(builder.to_app).to be_a(Protocol::HTTP::Middleware)
end
it "can use middleware with arguments" do
middleware_class = Class.new(Protocol::HTTP::Middleware) do
def initialize(app, argument1, argument2)
super(app)
@argument1 = argument1
@argument2 = argument2
end
attr :argument1, :argument2
end
builder = Protocol::HTTP::Middleware::Builder.new(Protocol::HTTP::Middleware::Okay)
builder.use(middleware_class, "test1", "test2")
app = builder.to_app
expect(app).to be_a(middleware_class)
expect(app.argument1).to be == "test1"
expect(app.argument2).to be == "test2"
end
it "can use middleware with options" do
middleware_class = Class.new(Protocol::HTTP::Middleware) do
def initialize(app, option1:, option2:)
super(app)
@option1 = option1
@option2 = option2
end
attr :option1, :option2
end
builder = Protocol::HTTP::Middleware::Builder.new(Protocol::HTTP::Middleware::Okay)
builder.use(middleware_class, option1: "value1", option2: "value2")
app = builder.to_app
expect(app).to be_a(middleware_class)
expect(app.option1).to be == "value1"
expect(app.option2).to be == "value2"
end
it "can use middleware with block" do
middleware_class = Class.new(Protocol::HTTP::Middleware) do
def initialize(app, &block)
super(app)
@block = block
end
attr :block
end
block_called = false
builder = Protocol::HTTP::Middleware::Builder.new(Protocol::HTTP::Middleware::Okay)
builder.use(middleware_class) do
block_called = true
end
app = builder.to_app
expect(app).to be_a(middleware_class)
expect(app.block).to be_a(Proc)
app.block.call
expect(block_called).to be == true
end
it "can run to set default app" do
builder = Protocol::HTTP::Middleware::Builder.new
builder.run(Protocol::HTTP::Middleware::Okay)
expect(builder.to_app).to be_equal(Protocol::HTTP::Middleware::Okay)
end
it "can chain multiple middleware" do
middleware1 = Class.new(Protocol::HTTP::Middleware) do
def initialize(app)
super(app)
@name = "middleware1"
end
attr :name
end
middleware2 = Class.new(Protocol::HTTP::Middleware) do
def initialize(app)
super(app)
@name = "middleware2"
end
attr :name
end
builder = Protocol::HTTP::Middleware::Builder.new(Protocol::HTTP::Middleware::Okay)
builder.use(middleware1)
builder.use(middleware2)
app = builder.to_app
# Middleware are reversed, so first added becomes outermost
expect(app).to be_a(middleware1)
expect(app.delegate).to be_a(middleware2)
expect(app.delegate.delegate).to be_equal(Protocol::HTTP::Middleware::Okay)
end
it "can convert to app directly" do
builder = Protocol::HTTP::Middleware::Builder.new(Protocol::HTTP::Middleware::HelloWorld)
app = builder.to_app
expect(app).to be_equal(Protocol::HTTP::Middleware::HelloWorld)
end
it "can load middleware from file" do
temp_file = Tempfile.new(["middleware", ".rb"])
temp_file.write(<<~RUBY)
use Protocol::HTTP::Middleware
run Protocol::HTTP::Middleware::HelloWorld
RUBY
temp_file.close
app = Protocol::HTTP::Middleware.load(temp_file.path)
expect(app).to be_a(Protocol::HTTP::Middleware)
expect(app.delegate).to be_equal(Protocol::HTTP::Middleware::HelloWorld)
ensure
temp_file&.unlink
end
it "can load middleware from file with block" do
temp_file = Tempfile.new(["middleware", ".rb"])
temp_file.write(<<~RUBY)
use Protocol::HTTP::Middleware
RUBY
temp_file.close
app = Protocol::HTTP::Middleware.load(temp_file.path) do
run Protocol::HTTP::Middleware::HelloWorld
end
expect(app).to be_a(Protocol::HTTP::Middleware)
expect(app.delegate).to be_equal(Protocol::HTTP::Middleware::HelloWorld)
ensure
temp_file&.unlink
end
end
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