# 🫥 RSpec::StubbedEnv

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---

`if ci_badges.map(&:color).all? { it == "green"}` 👇️ send money so I can do more of this. FLOSS maintenance is now my full-time job.

[![OpenCollective Backers][🖇osc-backers-i]][🖇osc-backers] [![OpenCollective Sponsors][🖇osc-sponsors-i]][🖇osc-sponsors] [![Sponsor Me on Github][🖇sponsor-img]][🖇sponsor] [![Liberapay Goal Progress][⛳liberapay-img]][⛳liberapay] [![Donate on PayPal][🖇paypal-img]][🖇paypal] [![Buy me a coffee][🖇buyme-small-img]][🖇buyme] [![Donate at ko-fi.com][🖇kofi-img]][🖇kofi]

👣 How will this project approach the September 2025 hostile takeover of RubyGems? 🚑️

I've summarized my thoughts in [this blog post](https://dev.to/galtzo/hostile-takeover-of-rubygems-my-thoughts-5hlo).

## 🌻 Synopsis  

An `ENV` stubbing / hiding library for sophisticated RSpec test suites.

* ENV stubbing and hiding via shared contexts for more powerful tests
  * ENV hiding via `hide_env("FOO")` was added in v1.0.2
* No need to add `dotenv` just for the spec suite

```ruby
describe "my stubbed test" do
  include_context "with stubbed env"
  include_context "with hidden env"
  context "with FOO=is bar" do
    before do
      stub_env("FOO" => "is bar")
    end
    it "has a value" do
      expect(ENV.fetch("FOO", nil)).to(eq("is bar"))
      expect(ENV.fetch("FOO")).to(eq("is bar"))
      expect(ENV["FOO"]).to(eq("is bar"))
    end
  end
  context "without BAR set" do
    before do
      hide_env("BAR")
    end
    it "is nil" do
      expect(ENV.fetch("BAR", nil)).to(be_nil)
      expect(ENV["BAR"]).to(be_nil)
    end
    it "raises error" do
      expect { ENV.fetch("BAR") }.to(raise_error(KeyNotFound))
    end
  end
end
```

This gem has no runtime dependencies.

I expect the current release of this gem to be compatible with Ruby 1.8.7+,
but it is only tested on CI against Ruby 2.3+,
due to the inherent limitations of GitHub Actions.

| 🚚 _Amazing_ test matrix was brought to you by | 🔎 appraisal2 🔎                                                                     |
|------------------------------------------------|--------------------------------------------------------------------------------------|
| 👟 Check it out!                               | ✨ [github.com/appraisal-rb/appraisal2](https://github.com/appraisal-rb/appraisal2) ✨ |

## 💡 Info you can shake a stick at

| Tokens to Remember | [![Gem name][⛳️name-img]][⛳️gem-name] [![Gem namespace][⛳️namespace-img]][⛳️gem-namespace] |
|-------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| Works with JRuby | [![JRuby 9.2 Compat][💎jruby-9.2i]][🚎jruby-9.2-wf] [![JRuby 9.3 Compat][💎jruby-9.3i]][🚎jruby-9.3-wf] 
 [![JRuby 9.4 Compat][💎jruby-9.4i]][🚎jruby-9.4-wf] [![JRuby 10.0 Compat][💎jruby-10.0i]][🚎jruby-10.0-wf] [![JRuby current Compat][💎jruby-c-i]][🚎10-j-wf] [![JRuby HEAD Compat][💎jruby-headi]][🚎3-hd-wf]|
| Works with Truffle Ruby | [![Truffle Ruby 22.3 Compat][💎truby-22.3i]][🚎truby-22.3-wf] [![Truffle Ruby 23.0 Compat][💎truby-23.0i]][🚎truby-23.0-wf] [![Truffle Ruby 23.1 Compat][💎truby-23.1i]][🚎truby-23.1-wf] 
 [![Truffle Ruby 24.2 Compat][💎truby-24.2i]][🚎truby-24.2-wf] [![Truffle Ruby 25.0 Compat][💎truby-25.0i]][🚎truby-25.0-wf] [![Truffle Ruby 33.0 Compat][💎truby-33.0i]][🚎truby-33.0-wf] [![Truffle Ruby current Compat][💎truby-c-i]][🚎9-t-wf] [![Truffle Ruby HEAD Compat][💎truby-headi]][🚎3-hd-wf]|
| Works with MRI Ruby 4 | [![Ruby current Compat][💎ruby-c-i]][🚎11-c-wf] [![Ruby HEAD Compat][💎ruby-headi]][🚎3-hd-wf]|
| Works with MRI Ruby 3 | [![Ruby 3.0 Compat][💎ruby-3.0i]][🚎ruby-3.0-wf] [![Ruby 3.1 Compat][💎ruby-3.1i]][🚎ruby-3.1-wf] [![Ruby 3.2 Compat][💎ruby-3.2i]][🚎ruby-3.2-wf] [![Ruby 3.3 Compat][💎ruby-3.3i]][🚎ruby-3.3-wf] [![Ruby 3.4 Compat][💎ruby-3.4i]][🚎ruby-3.4-wf]|
| Works with MRI Ruby 2 | ![Ruby 2.0 Compat][💎ruby-2.0i] ![Ruby 2.1 Compat][💎ruby-2.1i] ![Ruby 2.2 Compat][💎ruby-2.2i] ![Ruby 2.3 Compat][💎ruby-2.3i] 
 [![Ruby 2.4 Compat][💎ruby-2.4i]][🚎ruby-2.4-wf] [![Ruby 2.5 Compat][💎ruby-2.5i]][🚎ruby-2.5-wf] [![Ruby 2.6 Compat][💎ruby-2.6i]][🚎ruby-2.6-wf] [![Ruby 2.7 Compat][💎ruby-2.7i]][🚎ruby-2.7-wf]|
| Works with MRI Ruby 1 | ![Ruby 1.8 Compat][💎ruby-1.8i] ![Ruby 1.9 Compat][💎ruby-1.9i]|
| Support & Community | [![Join Me on Daily.dev's RubyFriends][✉️ruby-friends-img]][✉️ruby-friends] [![Live Chat on Discord][✉️discord-invite-img-ftb]][✉️discord-invite] [![Get help from me on Upwork][👨🏼‍🏫expsup-upwork-img]][👨🏼‍🏫expsup-upwork] [![Get help from me on Codementor][👨🏼‍🏫expsup-codementor-img]][👨🏼‍🏫expsup-codementor] |
| Source | [![Source on GitLab.com][📜src-gl-img]][📜src-gl] [![Source on CodeBerg.org][📜src-cb-img]][📜src-cb] [![Source on Github.com][📜src-gh-img]][📜src-gh] [![The best SHA: dQw4w9WgXcQ!][🧮kloc-img]][🧮kloc] |
| Documentation | [![Current release on RubyDoc.info][📜docs-cr-rd-img]][🚎yard-current] [![YARD on Galtzo.com][📜docs-head-rd-img]][🚎yard-head] [![Maintainer Blog][🚂maint-blog-img]][🚂maint-blog] [![GitLab Wiki][📜gl-wiki-img]][📜gl-wiki] [![GitHub Wiki][📜gh-wiki-img]][📜gh-wiki] |
| Compliance | [![License: MIT][📄license-img]][📄license] [![Apache license compatibility: Category A][📄license-compat-img]][📄license-compat] [![📄ilo-declaration-img]][📄ilo-declaration] [![Security Policy][🔐security-img]][🔐security] [![Contributor Covenant 2.1][🪇conduct-img]][🪇conduct] [![SemVer 2.0.0][📌semver-img]][📌semver] |
| Style | [![Enforced Code Style Linter][💎rlts-img]][💎rlts] [![Keep-A-Changelog 1.0.0][📗keep-changelog-img]][📗keep-changelog] [![Gitmoji Commits][📌gitmoji-img]][📌gitmoji] [![Compatibility appraised by: appraisal2][💎appraisal2-img]][💎appraisal2] |
| Maintainer 🎖️ | [![Follow Me on LinkedIn][💖🖇linkedin-img]][💖🖇linkedin] [![Follow Me on Ruby.Social][💖🐘ruby-mast-img]][💖🐘ruby-mast] [![Follow Me on Bluesky][💖🦋bluesky-img]][💖🦋bluesky] [![Contact Maintainer][🚂maint-contact-img]][🚂maint-contact] [![My technical writing][💖💁🏼‍♂️devto-img]][💖💁🏼‍♂️devto] |
| `...` 💖 | [![Find Me on WellFound:][💖✌️wellfound-img]][💖✌️wellfound] [![Find Me on CrunchBase][💖💲crunchbase-img]][💖💲crunchbase] [![My LinkTree][💖🌳linktree-img]][💖🌳linktree] [![More About Me][💖💁🏼‍♂️aboutme-img]][💖💁🏼‍♂️aboutme] [🧊][💖🧊berg] [🐙][💖🐙hub] [🛖][💖🛖hut] [🧪][💖🧪lab] |

### Compatibility

Compatible with MRI Ruby 1.8.7+, and concordant releases of JRuby, and TruffleRuby.
CI workflows and Appraisals are generated for MRI Ruby 2.4+.
This test floor is configured by `ruby.test_minimum` in `.kettle-jem.yml` and
may be higher than the gem's runtime compatibility floor when legacy Rubies are
not practical for the current toolchain.

The _amazing_ test matrix is powered by the kettle-dev stack.

How kettle-dev manages complexity in tests

| Gem | Source | Role | Daily download rank |
|-----|--------|------|---------------------|
| [appraisal2](https://bestgems.org/gems/appraisal2) | [GitHub](https://github.com/appraisal-rb/appraisal2) | multi-dependency Appraisal matrix generation | [![Daily download rank for appraisal2](https://img.shields.io/gem/rd/appraisal2.svg?style=flat-square)](https://bestgems.org/gems/appraisal2) |
| [appraisal2-rubocop](https://bestgems.org/gems/appraisal2-rubocop) | [GitHub](https://github.com/appraisal-rb/appraisal2-rubocop) | RuboCop Appraisal generator integration | [![Daily download rank for appraisal2-rubocop](https://img.shields.io/gem/rd/appraisal2-rubocop.svg?style=flat-square)](https://bestgems.org/gems/appraisal2-rubocop) |
| [kettle-dev](https://bestgems.org/gems/kettle-dev) | [GitHub](https://github.com/kettle-dev/kettle-dev) | development, release, and CI workflow tooling | [![Daily download rank for kettle-dev](https://img.shields.io/gem/rd/kettle-dev.svg?style=flat-square)](https://bestgems.org/gems/kettle-dev) |
| [kettle-jem](https://bestgems.org/gems/kettle-jem) | [GitHub](https://github.com/kettle-dev/kettle-jem) | Appraisals & CI workflow templates | [![Daily download rank for kettle-jem](https://img.shields.io/gem/rd/kettle-jem.svg?style=flat-square)](https://bestgems.org/gems/kettle-jem) |
| [kettle-soup-cover](https://bestgems.org/gems/kettle-soup-cover) | [GitHub](https://github.com/kettle-dev/kettle-soup-cover) | SimpleCov coverage policy and reporting | [![Daily download rank for kettle-soup-cover](https://img.shields.io/gem/rd/kettle-soup-cover.svg?style=flat-square)](https://bestgems.org/gems/kettle-soup-cover) |
| [kettle-test](https://bestgems.org/gems/kettle-test) | [GitHub](https://github.com/kettle-dev/kettle-test) | standard test runner and coverage harness | [![Daily download rank for kettle-test](https://img.shields.io/gem/rd/kettle-test.svg?style=flat-square)](https://bestgems.org/gems/kettle-test) |
| [rubocop-lts](https://bestgems.org/gems/rubocop-lts) | [GitHub](https://github.com/rubocop-lts/rubocop-lts) | Ruby-version-aware linting | [![Daily download rank for rubocop-lts](https://img.shields.io/gem/rd/rubocop-lts.svg?style=flat-square)](https://bestgems.org/gems/rubocop-lts) |
| [turbo_tests2](https://bestgems.org/gems/turbo_tests2) | [GitHub](https://github.com/galtzo-floss/turbo_tests2) | parallel test execution | [![Daily download rank for turbo_tests2](https://img.shields.io/gem/rd/turbo_tests2.svg?style=flat-square)](https://bestgems.org/gems/turbo_tests2) |

### Federated DVCS

Find this repo on federated forges (Coming soon!)

| Federated [DVCS][💎d-in-dvcs] Repository | Status | Issues | PRs | Wiki | CI | Discussions |
|-------------------------------------------------|-----------------------------------------------------------------------|---------------------------|--------------------------|---------------------------|--------------------------|------------------------------|
| 🧪 [galtzo-floss/rspec-stubbed_env on GitLab][📜src-gl] | The Truth | [💚][🤝gl-issues] | [💚][🤝gl-pulls] | [💚][📜gl-wiki] | 🐭 Tiny Matrix | ➖ |
| 🧊 [galtzo-floss/rspec-stubbed_env on CodeBerg][📜src-cb] | An Ethical Mirror ([Donate][🤝cb-donate]) | [💚][🤝cb-issues] | [💚][🤝cb-pulls] | ➖ | ⭕️ No Matrix | ➖ |
| 🐙 [galtzo-floss/rspec-stubbed_env on GitHub][📜src-gh] | Another Mirror | [💚][🤝gh-issues] | [💚][🤝gh-pulls] | [💚][📜gh-wiki] | 💯 Full Matrix | [💚][gh-discussions] |
| 🎮️ [Discord Server][✉️discord-invite] | [![Live Chat on Discord][✉️discord-invite-img-ftb]][✉️discord-invite] | [Let's][✉️discord-invite] | [talk][✉️discord-invite] | [about][✉️discord-invite] | [this][✉️discord-invite] | [library!][✉️discord-invite] |

[gh-discussions]: https://github.com/galtzo-floss/rspec-stubbed_env/discussions

### Enterprise Support [![Tidelift](https://tidelift.com/badges/package/rubygems/rspec-stubbed_env)](https://tidelift.com/subscription/pkg/rubygems-rspec-stubbed_env?utm_source=rubygems-rspec-stubbed_env&utm_medium=referral&utm_campaign=readme)

Available as part of the Tidelift Subscription.

Need enterprise-level guarantees?

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[![Get help from me on Tidelift][🏙️entsup-tidelift-img]][🏙️entsup-tidelift]

- 💡Subscribe for support guarantees covering _all_ your FLOSS dependencies
- 💡Tidelift is part of [Sonar][🏙️entsup-tidelift-sonar]
- 💡Tidelift pays maintainers to maintain the software you depend on!
📊`@`Pointy Haired Boss: An [enterprise support][🏙️entsup-tidelift] subscription is "[never gonna let you down][🧮kloc]", and *supports* open source maintainers

Alternatively:

- [![Live Chat on Discord][✉️discord-invite-img-ftb]][✉️discord-invite]
- [![Get help from me on Upwork][👨🏼‍🏫expsup-upwork-img]][👨🏼‍🏫expsup-upwork]
- [![Get help from me on Codementor][👨🏼‍🏫expsup-codementor-img]][👨🏼‍🏫expsup-codementor]

## ✨ Installation

Install the gem and add to the application's Gemfile by executing:

```console
bundle add rspec-stubbed_env
```

If bundler is not being used to manage dependencies, install the gem by executing:

```console
gem install rspec-stubbed_env
```

## ⚙️ Configuration

## 🔧 Basic Usage

You must configure RSpec to use the `:expect` syntax, or some compatible alternative.

```ruby
RSpec.configure do |config|
  config.expect_with(:rspec) do |c|
    c.syntax = :expect
  end
end
```

Require the library in your spec/test helper somewhere:
```ruby
require "rspec/stubbed_env"
```

### ENV stubbing

  - is opt-in, via a shared context, rather than global.
  - *does not* affect the real ENV at all.  It is a true stub.
  - has the same scope as a `before`, `subject`, or `let` at the same level.

See the spec suite for detailed examples.

```ruby
# This is normal, without stubbing, ENV is not set
describe "vanilla" do
  it "has no ENV stub" do
    expect(ENV.fetch("FOO", nil)).to(be_nil)
    expect(ENV["FOO"]).to(be_nil)
  end
end

# With a stubbed ENV!
describe "my stubbed test" do
  include_context "with stubbed env"
  before do
    stub_env("FOO" => "is bar")
  end
  it "has a value" do
    expect(ENV.fetch("FOO", nil)).to(eq("is bar"))
    expect(ENV["FOO"]).to(eq("is bar"))
  end
end
```

ENV can be stubbed trough the `stub_env` method, or key/value pairs to be stubbed can be
provided directly to the `include_context` call:

```ruby
describe "my stubbed test" do
  include_context "with stubbed env", "FOO" => "is bar"

  it "has a value" do
    expect(ENV.fetch("FOO", nil)).to(eq("is bar"))
    expect(ENV["FOO"]).to(eq("is bar"))
  end
end
```

By default, hash accessors such as `ENV.to_hash` and `ENV.to_h` are not stubbed.
This keeps partial ENV stubs narrow. When code under test needs a hash snapshot,
opt in with `stub_env_hash_accessors`:

```ruby
describe "my stubbed hash snapshot" do
  include_context "with stubbed env"
  include_context "with hidden env"

  before do
    stub_env_hash_accessors
    stub_env("FOO" => "is bar")
    hide_env("SECRET")
  end

  it "has a mixed real and stubbed hash" do
    expect(ENV.to_hash).to(include("FOO" => "is bar"))
    expect(ENV.to_hash).not_to(have_key("SECRET"))
  end
end
```

The helper is separate from `stub_env` arguments so real environment keys such
as `"to_hash"` remain ordinary stubbable keys.

If you want to make `stub_env` method available globally (without the `include_context` call),
you can add in the `spec_helper`.

I do not recommend the _global_ approach, as it results in a loss of clarity
on which tests are testing ENV-based behaviors.  Here's a foot-gun if you want it.

```ruby
RSpec.configure do |config|
  config.include(RSpec::StubbedEnv::StubHelpers)
  # Or you could include the context globally
  # config.include_context "with stubbed env"
end
```

### ENV hiding

- is opt-in, via a shared context, rather than global.
- *does not* affect the real ENV at all.  It is a true stub.
- has the same scope as a `before`, `subject`, or `let` at the same level.

See the spec suite for detailed examples.

```ruby
# This is normal, without hiding, ENV is set
ENV["MY_PATH"] = "/home/doodle"
describe "vanilla" do
  it "has ENV with nothing hidden" do
    expect(ENV.fetch("MY_PATH", nil)).to("/home/doodle")
    expect(ENV["MY_PATH"]).to("/home/doodle")
  end
end

# With a hidden ENV variable!
describe "my hidden test" do
  include_context "with hidden env"
  before do
    hide_env("MY_PATH")
  end
  it "MY_PATH is not set" do
    expect(ENV.fetch("MY_PATH", nil)).to(be_nil)
    expect(ENV["MY_PATH"]).to(be_nil)
  end
end
```

ENV variables can be hidden trough the `hide_env` method, or variable names to be hidden can be
provided directly to the `include_context` call:

```ruby
describe "my hidden test" do
  include_context "with hidden env", "MY_PATH"

  it "MY_PATH is not set" do
    expect(ENV.fetch("MY_PATH", nil)).to(be_nil)
    expect(ENV["MY_PATH"]).to(be_nil)
  end
end
```

If you want to make `hide_env` method available globally (without the `include_context` call),
you can add in the `spec_helper`:

I do not recommend the _global_ approach, as it results in a loss of clarity
on which tests are testing ENV-based behaviors.  Here's a foot-gun if you want it.

```ruby
RSpec.configure do |config|
  config.include(RSpec::StubbedEnv::HideHelpers)
  # Or you could include the context globally
  # config.include_context "with hidden env"
end
```

## 🦷 FLOSS Funding

While galtzo-floss tools are free software and will always be, the project would benefit immensely from some funding.
Raising a monthly budget of... "dollars" would make the project more sustainable.

We welcome both individual and corporate sponsors! We also offer a
wide array of funding channels to account for your preferences.
Currently, [Open Collective][🖇osc] is our preferred funding platform.

**If you're working in a company that's making significant use of galtzo-floss tools we'd
appreciate it if you suggest to your company to become a galtzo-floss sponsor.**

You can support the development of galtzo-floss tools via
[GitHub Sponsors][🖇sponsor],
[Liberapay][⛳liberapay],
[PayPal][🖇paypal],
[Open Collective][🖇osc]
and [Tidelift][🏙️entsup-tidelift].

| 📍 NOTE |
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| If doing a sponsorship in the form of donation is problematic for your company 
 from an accounting standpoint, we'd recommend the use of Tidelift, 
 where you can get a support-like subscription instead. |

### Open Collective for Individuals

Support us with a monthly donation and help us continue our activities. [[Become a backer](https://opencollective.com/galtzo-floss#backer)]

NOTE: [kettle-readme-backers][kettle-readme-backers] updates this list every day, automatically.

No backers yet. Be the first!

### Open Collective for Organizations

Become a sponsor and get your logo on our README on GitHub with a link to your site. [[Become a sponsor](https://opencollective.com/galtzo-floss#sponsor)]

NOTE: [kettle-readme-backers][kettle-readme-backers] updates this list every day, automatically.

No sponsors yet. Be the first!

[kettle-readme-backers]: https://github.com/galtzo-floss/rspec-stubbed_env/blob/main/bin/kettle-readme-backers

### Another way to support open-source

I’m driven by a passion to foster a thriving open-source community – a space where people can tackle complex problems, no matter how small. Revitalizing libraries that have fallen into disrepair, and building new libraries focused on solving real-world challenges, are my passions. I was recently affected by layoffs, and the tech jobs market is unwelcoming. I’m reaching out here because your support would significantly aid my efforts to provide for my family, and my farm (11 🐔 chickens, 2 🐶 dogs, 3 🐰 rabbits, 8 🐈‍ cats).

If you work at a company that uses my work, please encourage them to support me as a corporate sponsor. My work on gems you use might show up in `bundle fund`.

I’m developing a new library, [floss_funding][🖇floss-funding-gem], designed to empower open-source developers like myself to get paid for the work we do, in a sustainable way. Please give it a look.

**[Floss-Funding.dev][🖇floss-funding.dev]: 👉️ No network calls. 👉️ No tracking. 👉️ No oversight. 👉️ Minimal crypto hashing. 💡 Easily disabled nags**

[![OpenCollective Backers][🖇osc-backers-i]][🖇osc-backers] [![OpenCollective Sponsors][🖇osc-sponsors-i]][🖇osc-sponsors] [![Sponsor Me on Github][🖇sponsor-img]][🖇sponsor] [![Liberapay Goal Progress][⛳liberapay-img]][⛳liberapay] [![Donate on PayPal][🖇paypal-img]][🖇paypal] [![Buy me a coffee][🖇buyme-small-img]][🖇buyme] [![Donate to my FLOSS efforts at ko-fi.com][🖇kofi-img]][🖇kofi]

## 🔐 Security

See [SECURITY.md][🔐security].

## 🤝 Contributing

If you need some ideas of where to help, you could work on adding more code coverage,
or if it is already 💯 (see [below](#code-coverage)) check [issues][🤝gh-issues] or [PRs][🤝gh-pulls],
or use the gem and think about how it could be better.

We [![Keep A Changelog][📗keep-changelog-img]][📗keep-changelog] so if you make changes, remember to update it.

See [CONTRIBUTING.md][🤝contributing] for more detailed instructions.

### 🚀 Release Instructions

See [CONTRIBUTING.md][🤝contributing].

### Code Coverage

Coverage service badges

[![Coverage Graph][🏀codecov-g]][🏀codecov]

[![Coveralls Test Coverage][🏀coveralls-img]][🏀coveralls]

[![QLTY Test Coverage][🏀qlty-covi]][🏀qlty-cov]

### 🪇 Code of Conduct

Everyone interacting with this project's codebases, issue trackers,
chat rooms and mailing lists agrees to follow the [![Contributor Covenant 2.1][🪇conduct-img]][🪇conduct].

## 🌈 Contributors

[![Contributors][🖐contributors-img]][🖐contributors]

Made with [contributors-img][🖐contrib-rocks].

Also see GitLab Contributors: [https://gitlab.com/galtzo-floss/rspec-stubbed_env/-/graphs/main][🚎contributors-gl]

⭐️ Star History

## 📌 Versioning

This library follows [![Semantic Versioning 2.0.0][📌semver-img]][📌semver] for its public API where practical.
For most applications, prefer the [Pessimistic Version Constraint][📌pvc] with two digits of precision.

For example:

```ruby
spec.add_dependency("rspec-stubbed_env", "~> 1.0")
```


📌 Is "Platform Support" part of the public API? More details inside.

Dropping support for a platform can be a breaking change for affected users.
If a release changes supported platforms, it should be called out clearly in the changelog and versioned with that impact in mind.

To get a better understanding of how SemVer is intended to work over a project's lifetime,
read this article from the creator of SemVer:

- ["Major Version Numbers are Not Sacred"][📌major-versions-not-sacred]

See [CHANGELOG.md][📌changelog] for a list of releases.

## 📄 License

The gem is available as open source under the terms of
the [MIT](MIT.md) [![License: MIT][📄license-img]][📄license-ref].

### © Copyright

See [LICENSE.md][📄license] for the official copyright notice.

Copyright holders

- Copyright (c) 2018-2019, 2023, 2025-2026 Peter H. Boling
- Copyright (c) 2024 Maxim Krizhanovski

## 🤑 A request for help

Maintainers have teeth and need to pay their dentists.
After getting laid off in an RIF in March, and encountering difficulty finding a new one,
I began spending most of my time building open source tools.
I'm hoping to be able to pay for my kids' health insurance this month,
so if you value the work I am doing, I need your support.
Please consider sponsoring me or the project.

To join the community or get help 👇️ Join the Discord.

[![Live Chat on Discord][✉️discord-invite-img-ftb]][✉️discord-invite]

To say "thanks!" ☝️ Join the Discord or 👇️ send money.

[![Sponsor galtzo-floss/rspec-stubbed_env on Open Source Collective][🖇osc-all-bottom-img]][🖇osc] 💌 [![Sponsor me on GitHub Sponsors][🖇sponsor-bottom-img]][🖇sponsor] 💌 [![Sponsor me on Liberapay][⛳liberapay-bottom-img]][⛳liberapay] 💌 [![Donate on PayPal][🖇paypal-bottom-img]][🖇paypal]

### Please give the project a star ⭐ ♥.

Many parts of this project are actively managed by a [kettle-jem](https://github.com/structuredmerge/structuredmerge-ruby/tree/main/gems/kettle-jem) smart template utilizing [StructuredMerge.org](https://structuredmerge.org) merge contracts.

Thanks for RTFM. ☺️

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[🖇buyme-small-img]: https://img.shields.io/badge/buy_me_a_coffee-%E2%9C%93-a51611.svg?style=flat
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[🖇buyme]: https://www.buymeacoffee.com/pboling
[🖇paypal-img]: https://img.shields.io/badge/donate-paypal-a51611.svg?style=flat&logo=paypal
[🖇paypal-bottom-img]: https://img.shields.io/badge/donate-paypal-a51611.svg?style=for-the-badge&logo=paypal&color=0A0A0A
[🖇paypal]: https://www.paypal.com/paypalme/peterboling
[🖇floss-funding.dev]: https://floss-funding.dev
[🖇floss-funding-gem]: https://github.com/galtzo-floss/floss_funding
[✉️discord-invite]: https://discord.gg/3qme4XHNKN
[✉️discord-invite-img-ftb]: https://img.shields.io/discord/1373797679469170758?style=for-the-badge&logo=discord
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[✉️ruby-friends]: https://app.daily.dev/squads/rubyfriends

[✇bundle-group-pattern]: https://gist.github.com/pboling/4564780
[⛳️gem-namespace]: https://github.com/galtzo-floss/rspec-stubbed_env
[⛳️namespace-img]: https://img.shields.io/badge/namespace-RSpec::StubbedEnv-3C2D2D.svg?style=square&logo=ruby&logoColor=white
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[🚂maint-contact-img]: https://img.shields.io/badge/Contact-Maintainer-0093D0.svg?style=flat&logo=rubyonrails&logoColor=red
[💖🖇linkedin]: http://www.linkedin.com/in/peterboling
[💖🖇linkedin-img]: https://img.shields.io/badge/LinkedIn-Profile-0B66C2?style=flat&logo=newjapanprowrestling
[💖✌️wellfound]: https://wellfound.com/u/peter-boling
[💖✌️wellfound-img]: https://img.shields.io/badge/peter--boling-orange?style=flat&logo=wellfound
[💖💲crunchbase]: https://www.crunchbase.com/person/peter-boling
[💖💲crunchbase-img]: https://img.shields.io/badge/peter--boling-purple?style=flat&logo=crunchbase
[💖🐘ruby-mast]: https://ruby.social/@galtzo
[💖🐘ruby-mast-img]: https://img.shields.io/mastodon/follow/109447111526622197?domain=https://ruby.social&style=flat&logo=mastodon&label=Ruby%20@galtzo
[💖🦋bluesky]: https://bsky.app/profile/galtzo.com
[💖🦋bluesky-img]: https://img.shields.io/badge/@galtzo.com-0285FF?style=flat&logo=bluesky&logoColor=white
[💖🌳linktree]: https://linktr.ee/galtzo
[💖🌳linktree-img]: https://img.shields.io/badge/galtzo-purple?style=flat&logo=linktree
[💖💁🏼‍♂️devto]: https://dev.to/galtzo
[💖💁🏼‍♂️devto-img]: https://img.shields.io/badge/dev.to-0A0A0A?style=flat&logo=devdotto&logoColor=white
[💖💁🏼‍♂️aboutme]: https://about.me/peter.boling
[💖💁🏼‍♂️aboutme-img]: https://img.shields.io/badge/about.me-0A0A0A?style=flat&logo=aboutme&logoColor=white
[💖🧊berg]: https://codeberg.org/pboling
[💖🐙hub]: https://github.org/pboling
[💖🛖hut]: https://sr.ht/~galtzo/
[💖🧪lab]: https://gitlab.com/pboling
[👨🏼‍🏫expsup-upwork]: https://www.upwork.com/freelancers/~014942e9b056abdf86?mp_source=share
[👨🏼‍🏫expsup-upwork-img]: https://img.shields.io/badge/UpWork-13544E?style=for-the-badge&logo=Upwork&logoColor=white
[👨🏼‍🏫expsup-codementor]: https://www.codementor.io/peterboling?utm_source=github&utm_medium=button&utm_term=peterboling&utm_campaign=github
[👨🏼‍🏫expsup-codementor-img]: https://img.shields.io/badge/CodeMentor-Get_Help-1abc9c?style=for-the-badge&logo=CodeMentor&logoColor=white
[🏙️entsup-tidelift]: https://tidelift.com/subscription/pkg/rubygems-rspec-stubbed_env?utm_source=rubygems-rspec-stubbed_env&utm_medium=referral&utm_campaign=readme
[🏙️entsup-tidelift-img]: https://img.shields.io/badge/Tidelift_and_Sonar-Enterprise_Support-FD3456?style=for-the-badge&logo=sonar&logoColor=white
[🏙️entsup-tidelift-sonar]: https://blog.tidelift.com/tidelift-joins-sonar
[💁🏼‍♂️peterboling]: http://www.peterboling.com
[🚂railsbling]: http://www.railsbling.com
[📜src-gl-img]: https://img.shields.io/badge/GitLab-FBA326?style=for-the-badge&logo=Gitlab&logoColor=orange
[📜src-gl]: https://gitlab.com/galtzo-floss/rspec-stubbed_env
[📜src-cb-img]: https://img.shields.io/badge/CodeBerg-4893CC?style=for-the-badge&logo=CodeBerg&logoColor=blue
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[💎ruby-3.3i]: https://img.shields.io/badge/Ruby-3.3-CC342D?style=for-the-badge&logo=ruby&logoColor=white
[💎ruby-3.4i]: https://img.shields.io/badge/Ruby-3.4-CC342D?style=for-the-badge&logo=ruby&logoColor=white
[💎ruby-c-i]: https://img.shields.io/badge/Ruby-current-CC342D?style=for-the-badge&logo=ruby&logoColor=green
[💎ruby-headi]: https://img.shields.io/badge/Ruby-HEAD-CC342D?style=for-the-badge&logo=ruby&logoColor=blue
[💎truby-22.3i]: https://img.shields.io/badge/Truffle_Ruby-22.3-34BCB1?style=for-the-badge&logo=ruby&logoColor=pink
[💎truby-23.0i]: https://img.shields.io/badge/Truffle_Ruby-23.0-34BCB1?style=for-the-badge&logo=ruby&logoColor=pink
[💎truby-23.1i]: https://img.shields.io/badge/Truffle_Ruby-23.1-34BCB1?style=for-the-badge&logo=ruby&logoColor=pink
[💎truby-24.2i]: https://img.shields.io/badge/Truffle_Ruby-24.2-34BCB1?style=for-the-badge&logo=ruby&logoColor=pink
[💎truby-25.0i]: https://img.shields.io/badge/Truffle_Ruby-25.0-34BCB1?style=for-the-badge&logo=ruby&logoColor=pink
[💎truby-33.0i]: https://img.shields.io/badge/Truffle_Ruby-33.0-34BCB1?style=for-the-badge&logo=ruby&logoColor=pink
[💎truby-c-i]: https://img.shields.io/badge/Truffle_Ruby-current-34BCB1?style=for-the-badge&logo=ruby&logoColor=green
[💎truby-headi]: https://img.shields.io/badge/Truffle_Ruby-HEAD-34BCB1?style=for-the-badge&logo=ruby&logoColor=blue
[💎jruby-9.2i]: https://img.shields.io/badge/JRuby-9.2-FBE742?style=for-the-badge&logo=ruby&logoColor=red
[💎jruby-9.3i]: https://img.shields.io/badge/JRuby-9.3-FBE742?style=for-the-badge&logo=ruby&logoColor=red
[💎jruby-9.4i]: https://img.shields.io/badge/JRuby-9.4-FBE742?style=for-the-badge&logo=ruby&logoColor=red
[💎jruby-10.0i]: https://img.shields.io/badge/JRuby-10.0-FBE742?style=for-the-badge&logo=ruby&logoColor=red
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[💎jruby-headi]: https://img.shields.io/badge/JRuby-HEAD-FBE742?style=for-the-badge&logo=ruby&logoColor=blue
[🤝gh-issues]: https://github.com/galtzo-floss/rspec-stubbed_env/issues
[🤝gh-pulls]: https://github.com/galtzo-floss/rspec-stubbed_env/pulls
[🤝gl-issues]: https://gitlab.com/galtzo-floss/rspec-stubbed_env/-/issues
[🤝gl-pulls]: https://gitlab.com/galtzo-floss/rspec-stubbed_env/-/merge_requests
[🤝cb-issues]: https://codeberg.org/galtzo-floss/rspec-stubbed_env/issues
[🤝cb-pulls]: https://codeberg.org/galtzo-floss/rspec-stubbed_env/pulls
[🤝cb-donate]: https://donate.codeberg.org/
[🤝contributing]: https://github.com/galtzo-floss/rspec-stubbed_env/blob/main/CONTRIBUTING.md
[🏀codecov-g]: https://codecov.io/gh/galtzo-floss/rspec-stubbed_env/graph/badge.svg
[🖐contrib-rocks]: https://contrib.rocks
[🖐contributors]: https://github.com/galtzo-floss/rspec-stubbed_env/graphs/contributors
[🖐contributors-img]: https://contrib.rocks/image?repo=galtzo-floss/rspec-stubbed_env
[🚎contributors-gl]: https://gitlab.com/galtzo-floss/rspec-stubbed_env/-/graphs/main
[🪇conduct]: https://github.com/galtzo-floss/rspec-stubbed_env/blob/main/CODE_OF_CONDUCT.md
[🪇conduct-img]: https://img.shields.io/badge/Contributor_Covenant-2.1-259D6C.svg
[📌pvc]: http://guides.rubygems.org/patterns/#pessimistic-version-constraint
[📌semver]: https://semver.org/spec/v2.0.0.html
[📌semver-img]: https://img.shields.io/badge/semver-2.0.0-259D6C.svg?style=flat
[📌semver-breaking]: https://github.com/semver/semver/issues/716#issuecomment-869336139
[📌major-versions-not-sacred]: https://tom.preston-werner.com/2022/05/23/major-version-numbers-are-not-sacred.html
[📌changelog]: https://github.com/galtzo-floss/rspec-stubbed_env/blob/main/CHANGELOG.md
[📗keep-changelog]: https://keepachangelog.com/en/1.0.0/
[📗keep-changelog-img]: https://img.shields.io/badge/keep--a--changelog-1.0.0-34495e.svg?style=flat
[📌gitmoji]: https://gitmoji.dev
[📌gitmoji-img]: https://img.shields.io/badge/gitmoji_commits-%20%F0%9F%98%9C%20%F0%9F%98%8D-34495e.svg?style=flat-square
[🧮kloc]: https://www.youtube.com/watch?v=dQw4w9WgXcQ
[🧮kloc-img]: https://img.shields.io/badge/KLOC-0.095-FFDD67.svg?style=for-the-badge&logo=YouTube&logoColor=blue
[🔐security]: https://github.com/galtzo-floss/rspec-stubbed_env/blob/main/SECURITY.md
[🔐security-img]: https://img.shields.io/badge/security-policy-259D6C.svg?style=flat
[📄copyright-notice-explainer]: https://opensource.stackexchange.com/questions/5778/why-do-licenses-such-as-the-mit-license-specify-a-single-year
[📄license]: LICENSE.md
[📄license-ref]: MIT.md
[📄license-img]: https://img.shields.io/badge/License-MIT-259D6C.svg
[📄license-compat]: https://www.apache.org/legal/resolved.html#category-a
[📄license-compat-img]: https://img.shields.io/badge/Apache_Compatible:_Category_A-%E2%9C%93-259D6C.svg?style=flat&logo=Apache

[📄ilo-declaration]: https://www.ilo.org/declaration/lang--en/index.htm
[📄ilo-declaration-img]: https://img.shields.io/badge/ILO_Fundamental_Principles-✓-259D6C.svg?style=flat
[🚎yard-current]: http://rubydoc.info/gems/rspec-stubbed_env
[🚎yard-head]: https://rspec-stubbed-env.galtzo.com
[💎stone_checksums]: https://github.com/galtzo-floss/stone_checksums
[💎SHA_checksums]: https://gitlab.com/galtzo-floss/rspec-stubbed_env/-/tree/main/checksums
[💎rlts]: https://github.com/rubocop-lts/rubocop-lts
[💎rlts-img]: https://img.shields.io/badge/code_style_&_linting-rubocop--lts-34495e.svg?plastic&logo=ruby&logoColor=white
[💎appraisal2]: https://github.com/appraisal-rb/appraisal2
[💎appraisal2-img]: https://img.shields.io/badge/appraised_by-appraisal2-34495e.svg?plastic&logo=ruby&logoColor=white
[💎d-in-dvcs]: https://railsbling.com/posts/dvcs/put_the_d_in_dvcs/
