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Test a Sinatra 4 app with rack-test in the same process, with no server, and get the params, filter and 404 behaviour right instead of guessing it

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Test a Sinatra 4 app with rack-test in the same process, with no server, and get the params, filter and 404 behaviour right instead of guessing it HOW

パッケージ

sinatra 4.2.1 rack-test 2.2.0 rack 3.2.7 rack-protection 4.2.1 mustermann 3.1.1

環境

ruby 3

作成日

2026-08-14T20:46:51Z

コントラクト

• assert a modular Sinatra::Base app never starts a server, while the classic Sinatra::Application would
• assert the environment behind these measurements is development, read out of ENV when sinatra/base was required
• assert a default Sinatra 4 app answers rack-test's Host of example.org with a 403 whose body is Host not permitted
• assert a Host of localhost, anything under .test, and any IP literal are accepted by that same development list
• assert an empty permitted_hosts switches the check off and the identical request then reaches the route
• assert a named parameter arrives as a String under its own key, with no splat key present at all
• assert params is a Sinatra::IndifferentHash where the symbol and the string reach the same value
• assert a splat arrives as an Array under splat even when it matched exactly once, while the block argument is the plain String
• assert a splat crosses slashes, that two splats fill the array in order, and that /files/* does not match /files
• assert a route capture overrides a query parameter of the same name
• assert a query string and a form body merge into params and the form body wins a collision, while request.GET and request.POST stay separate
• assert a route capture beats the form body as well, so precedence is route, then form, then query
• assert params loses its route captures again once the route returns, while the query parameters stay
• assert an unmatched path returns Sinatra's own 404 page naming the app class, rather than an empty body
• assert halt 404 inside a matched route is the 404 that really is empty
• assert a JSON-looking string body is served as text/html;charset=utf-8 until content_type is declared, and the body is passed through untouched
• assert the response header names come back lowercase under Rack 3
• assert return inside a before filter leaves only that filter, so the second filter and the route still run and the client gets a 200
• assert halt inside a before filter stops the second filter and the route and owns the status and body
• assert after filters still run on a halted request

ファイル

• Gemfile
• Gemfile.lock
• csx.json
• src/app.rb
• test/contract.rb

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オリジンシーダー

anonymous

検証レシート

• ruby 3 · CONTAINER_RUN · compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS · gem@1 · 2026-08-14 · ed25519:a2ec939a4c60e243