What is launching-fragments-with-fragmentscenario?

A guide to testing one Android Fragment in isolation with FragmentScenario, a tool that places the Fragment in a temporary host Activity. A Fragment is a reusable part of an Android screen.

Use it to launch a Fragment with or without a container, exercise its lifecycle, test AppCompat or Material widgets with the right theme, and diagnose missing navigation setup.

It clarifies the required test dependencies, lifecycle controls, theme setup, and the limits of testing navigation without the real host screen.

launching-fragments-with-fragmentscenario — Skill for Claude Code and

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent

npx skills add skydoves/android-testing-skills --skill launching-fragments-with-fragmentscenario

Clone the repo

git clone --depth 1 https://github.com/skydoves/android-testing-skills

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/skills/skydoves/android-testing-skills/launching-fragments-with-fragmentscenario/github.svg)](https://agentmods.dev/skills/skydoves/android-testing-skills/launching-fragments-with-fragmentscenario)

Your own site

<a href="https://agentmods.dev/skills/skydoves/android-testing-skills/launching-fragments-with-fragmentscenario"><img src="https://agentmods.dev/badge/skills/skydoves/android-testing-skills/launching-fragments-with-fragmentscenario/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/skills/skydoves/android-testing-skills/launching-fragments-with-fragmentscenario"><img src="https://agentmods.dev/badge/skills/skydoves/android-testing-skills/launching-fragments-with-fragmentscenario.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 208 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 3,790 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits

NVIDIA SkillSpector pass 7 Sept 2026

How audits are shown

Origin original No closer match found in the catalogue.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5.1	$0.00208	$0.03790
Opus 5	$0.00104	$0.01895
Sonnet 5	$0.00042	$0.00758
Haiku 4.5	$0.00021	$0.00379

Measured 13d ago against content hash cedb206234e0, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

launching-fragments-with-fragmentscenario scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 13d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

instrumentation/scenarios/launching-fragments-with-fragmentscenario/SKILL.md · 279 lines

How it starts

The opening of the file, as written. The whole thing — 279 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Launching Fragments with FragmentScenario — Test Fragments in Isolation

FragmentScenario hosts a single fragment inside an internal EmptyFragmentActivity so the fragment's onCreate / onViewCreated / lifecycle can be exercised without a real screen. Two entry points exist: launchFragmentInContainer<F>() adds the fragment to android.R.id.content (full lifecycle including view), and launchFragment<F>() attaches it with no container (headless). The default theme extends android:Theme.WithActionBar, NOT AppCompat — overriding via themeResId is required for any AppCompat widget. This skill encodes the two artifacts, the theme trap, and the navigation limitation.

When to use this skill

The user wants to test a single Fragment without launching the full host Activity.
A test crashes with IllegalArgumentException: You need to use a Theme.AppCompat theme (or descendant) with the design library and the fragment uses AppCompat / Material widgets.
A test calls findNavController() and crashes with Fragment ... does not have a NavController set.
The user wants to drive lifecycle (STARTED / RESUMED / DESTROYED) on a fragment for state-change testing.
The user wants to inject a custom FragmentFactory for a fragment that doesn't have a no-arg constructor.
The user mentions "headless fragment" or asks why onViewCreated doesn't fire.

When NOT to use this skill

The host is an Activity, not a Fragment — see ../launching-activities-with-activityscenario/SKILL.md.
The fragment requires a real navigation stack (NavHostFragment) — FragmentScenario does not provide one; use a custom test host activity that wires up NavHostFragment instead, or TestNavHostController.
The runner / dependency stack is not yet set up — start with ../../runner/running-instrumented-tests-with-androidjunit4/SKILL.md.
The fragment hosts Compose content and the test interacts via the Compose tree — see ../../../compose/setup/configuring-test-dependencies/SKILL.md.

Read the full file on GitHub · 279 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

13d ago First seen · 279 lines · 208 tokens per session scan A cedb206234e0

Subscribe to this mod's changes

launching-fragments-with-fragmentscenario is a skill published in the GitHub repository skydoves/android-testing-skills (320 stars, last pushed 3mo ago), licensed Apache-2.0. It adds 208 tokens to every session and 3,790 once invoked, about $0.0010 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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