Reword the Molecule scenario comments

They were hard-wrapped at 80 characters, broke mid-parenthesis, and spent lines
restating what the code below them does.

Rewrapped at natural boundaries instead, with the narration dropped and only the
reasons, gotchas and surprises kept. Section dividers stay - they delineate long
plays rather than narrate them.

Comments only; no scenario behaviour changes.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01SEH3vxYSQ5SV4N5z61eyGT
This commit is contained in:
Slavi Pantaleev
2026-08-27 18:02:53 +03:00
co-authored by Claude Opus 5
parent e2d3be504e
commit c447e1528b
32 changed files with 458 additions and 641 deletions
@@ -29,67 +29,57 @@ provisioner:
all:
matrix_bridge_hookshot_container_network: hookshot-molecule
# The stub prepare.yml stands up. Hookshot contacts it while starting;
# it is not a real homeserver and nothing is asserted about it.
# The stub prepare.yml stands up. Not a real homeserver, and nothing is asserted
# about it.
matrix_bridge_hookshot_homeserver_address: http://matrix.molecule.local:8008
# Appservice tokens. These are what Hookshot and the homeserver would
# authenticate to each other with; here they only have to reach the
# rendered configuration and the registration file.
# Here these only have to reach the rendered configuration and the registration.
matrix_bridge_hookshot_appservice_token: molecule_as_token_4f2a91
matrix_bridge_hookshot_homeserver_token: molecule_hs_token_9b3e77
# Deliberately different from the role's default (`hookshot`), so the
# registration's sender_localpart can only have come from the role.
# prepare.yml tells the homeserver stub to claim this same user id.
# Different from the role's default, so the registration's sender_localpart can only
# have come from the role. prepare.yml tells the stub to claim this same user id.
matrix_bridge_hookshot_bot_localpart: molecule-hookshot
# Hookshot's HTTP surface is the point of this scenario. Every port
# below differs from BOTH the role's default and Hookshot's own, so an
# answer on one of them can only mean the role's configuration reached
# the process. verify.yml also asserts that nothing answers on the
# defaults these replace (9993 appservice, 9000 webhooks, 9001 metrics).
# Hookshot's HTTP surface is the point of this scenario. Every port below differs
# from BOTH the role's default and Hookshot's own, so an answer can only mean the
# role's configuration reached the process. verify.yml also asserts nothing answers
# on the defaults these replace.
matrix_bridge_hookshot_appservice_port: 9772
matrix_bridge_hookshot_webhook_port: 9741
# Off in the role's defaults. Enabling it makes the role render a second
# entry in Hookshot's `listeners` list, which is the cheapest listener to
# assert *content* on: /metrics answers in a format nothing else would.
# Off in the role's defaults. Enabling it renders a second entry in the `listeners`
# list, and /metrics is the cheapest listener to assert *content* on.
matrix_bridge_hookshot_metrics_enabled: true
matrix_bridge_hookshot_metrics_port: 9752
# On in the role's defaults. Turned off here so that the absence of a
# listener can be asserted too - the widgets port staying closed is what
# tells "the role rendered the listener list" apart from "Hookshot binds
# everything anyway".
# On in the role's defaults. Off here so the absence of a listener can be asserted:
# the widgets port staying closed is what tells "the role rendered the listener list"
# apart from "Hookshot binds everything anyway".
matrix_bridge_hookshot_widgets_enabled: false
# No third-party service is configured in this scenario - see the header
# of verify.yml. GitLab is the one the role enables by default, so it is
# explicitly switched off and its absence from the rendered config and
# registration is asserted.
# No third-party service is configured here; see the header of verify.yml.
# GitLab is the one the role enables by default, so it is explicitly switched off.
matrix_bridge_hookshot_gitlab_enabled: false
# The generic webhooks listener is the only part of Hookshot that needs
# no account anywhere, so it is what this scenario exercises live. The
# prefix differs from the role's default (`_webhooks_`).
# The generic webhooks listener needs no account anywhere, so it is what this
# scenario exercises live. The prefix differs from the role's default.
matrix_bridge_hookshot_generic_userIdPrefix: _molecule_hook_ # noqa var-naming
# Neither the role's default (600) nor Hookshot's own (600).
matrix_bridge_hookshot_feeds_pollIntervalSeconds: 907 # noqa var-naming
# The role defaults to `warn`; Hookshot itself defaults to `info`. This
# is a third value, so finding it in config.yml cannot be a coincidence.
# The role defaults to `warn`, Hookshot itself to `info`. A third value, so finding
# it in config.yml cannot be a coincidence.
matrix_bridge_hookshot_logging_level: debug
# Traefik is not deployed here, so the labels the role would render for
# it are switched off and their absence is asserted instead.
# Traefik is not deployed here, so the labels the role would render for it are
# switched off and their absence is asserted instead.
matrix_bridge_hookshot_container_labels_traefik_enabled: false
# verify.yml runs as its own play, where role defaults are out of scope,
# so what it reads is pinned here. These two match the role's own
# defaults on purpose - they name things (a path, a container) rather
# than configure them, and nothing is asserted *about* them.
# verify.yml runs as its own play, where role defaults are out of scope, so what it
# reads is pinned here. These two match the role's own defaults on purpose: they name
# things rather than configure them, and nothing is asserted *about* them.
matrix_bridge_hookshot_base_path: /matrix/hookshot
matrix_bridge_hookshot_identifier: matrix-hookshot
env:
@@ -31,9 +31,8 @@
docker_daemon_options:
storage-driver: fuse-overlayfs
# The role's file tasks set owner/group by name and Ansible resolves those
# through the passwd database, so they have to exist first. matrix-base
# creates them in a real deployment.
# The role's file tasks set owner/group by name, which Ansible resolves through the
# passwd database, so they have to exist first. `matrix-base` creates them for real.
- name: Ensure the matrix group exists
ansible.builtin.group:
name: "{{ matrix_group_name }}"
@@ -3,15 +3,14 @@
# SPDX-License-Identifier: AGPL-3.0-or-later
---
# What this proves: Hookshot starts, accepts the config.yml and registration.yml
# the role rendered, and opens exactly the HTTP listeners that configuration
# described - on the ports the role put there, and not on the ones it did not.
# Proves Hookshot starts on the config.yml and registration.yml the role rendered,
# and opens exactly the HTTP listeners that configuration described - on the ports
# the role put there, and not on the ones it did not.
#
# What it deliberately does NOT do: configure GitHub, GitLab, Jira or Figma.
# Every one of those needs an account and a credential on a third-party service,
# which is the line where a scenario stops testing this repository and starts
# testing a fake (see docs/molecule-testing.md). The generic webhooks listener
# needs no credential from anyone, so it is the one that gets exercised live.
# Deliberately does NOT configure GitHub, GitLab, Jira or Figma. Each needs an account
# and a credential on a third-party service, which is where a scenario stops testing this
# repository and starts testing a fake (see docs/molecule-testing.md). The generic webhooks
# listener needs no credential from anyone, so it is the one exercised live.
- name: Verify hookshot
hosts: all
become: true
@@ -21,11 +20,10 @@
gather_facts: false
tasks:
# Read from the role's own defaults rather than pinned in molecule.yml, so
# the version assertion below compares the running image against what the
# role ships instead of against the scenario itself. The default ports come
# from here for the same reason: the "these ports stay closed" assertion is
# only meaningful against the ports the role would otherwise have used.
# From the role's own defaults rather than pinned in molecule.yml, so the version
# assertion compares the running image against what the role ships, not against the
# scenario. The default ports come from here for the same reason: "these ports stay
# closed" is only meaningful against the ports the role would otherwise have used.
- name: Load the role's defaults under a separate name
ansible.builtin.include_vars:
file: "{{ lookup('env', 'MOLECULE_PROJECT_DIRECTORY') }}/defaults/main.yml"
@@ -40,10 +38,9 @@
delay: 5
failed_when: false
# `Restart=always` means a bridge crash-looping on a configuration it cannot
# read still reports `active`, so the restart counter is checked too. It is
# asserted `is defined` because `| int` turns a missing property into 0 and
# would pass vacuously.
# `Restart=always` means a bridge crash-looping on unreadable config still reports
# `active`, so the restart counter is checked too. Asserted `is defined` because
# `| int` turns a missing property into 0 and would pass vacuously.
- name: Assert the service is active and has not been restarting
ansible.builtin.assert:
that:
@@ -70,9 +67,8 @@
ansible.builtin.set_fact:
hookshot_config: "{{ hookshot_config_file.content | b64decode | from_yaml }}"
# Each of these differs from what Hookshot would use on its own AND from
# what the role defaults to, so finding them here means the role's
# configuration is what Hookshot is running on rather than a coincidence.
# Each differs from what Hookshot would use on its own AND from the role's defaults,
# so finding them here rules out a coincidence.
- name: Assert the rendered configuration carries this scenario's values
ansible.builtin.assert:
that:
@@ -86,10 +82,9 @@
fail_msg: "The rendered configuration does not carry the scenario's values"
success_msg: "The rendered configuration carries the scenario's values"
# Hookshot's `listeners` list is the role's own construction: it decides
# which resources get a port at all, from a handful of independent switches.
# Getting this wrong is invisible in a "did it start" test, which is why it
# is asserted as a whole rather than key by key.
# The `listeners` list is the role's own construction, assembled from a handful of
# independent switches. Getting it wrong is invisible in a "did it start" test,
# hence asserting the whole shape rather than key by key.
- name: Assert the role rendered exactly the listeners the scenario asked for
ansible.builtin.assert:
that:
@@ -103,9 +98,8 @@
vars:
hookshot_listener_ports: "{{ hookshot_config.listeners | map(attribute='port') | map('int') | list }}"
# No third-party service is configured here, so none of their sections may
# appear. GitLab is the interesting one: the role turns it ON by default, so
# its absence is what proves the scenario's switch reached the template.
# GitLab is the interesting one: the role turns it ON by default, so its absence
# proves the scenario's switch reached the template.
- name: Assert no third-party service section was rendered
ansible.builtin.assert:
that:
@@ -131,9 +125,8 @@
# The rendered registration
# ------------------------------------------------------------------
# The registration file is the half of the appservice handshake the
# homeserver reads. The role generates it, Hookshot only consumes it, so it
# is worth checking on its own.
# The role generates the registration; Hookshot only consumes it. Worth checking
# on its own, as it is the half of the handshake the homeserver reads.
- name: Read the appservice registration the role rendered
ansible.builtin.slurp:
src: "{{ matrix_bridge_hookshot_base_path }}/registration.yml"
@@ -143,9 +136,8 @@
ansible.builtin.set_fact:
hookshot_registration: "{{ hookshot_registration_file.content | b64decode | from_yaml }}"
# `url` is where the homeserver would push transactions, and the role builds
# it out of the container name and the appservice port. It has to agree with
# `bridge.port` in config.yml or the two halves would silently disagree.
# `url` is built from the container name and the appservice port. It has to agree
# with `bridge.port` in config.yml, or the two halves silently disagree.
- name: Assert the registration carries the scenario's tokens, bot and callback URL
ansible.builtin.assert:
that:
@@ -156,9 +148,9 @@
fail_msg: "The appservice registration does not carry the scenario's tokens, bot and callback URL"
success_msg: "The appservice registration carries the scenario's tokens, bot and callback URL"
# The user namespace is derived from the generic webhook prefix, and the
# GitLab namespace is conditional on the service being enabled - so this
# checks that the two switches reach the registration, not just config.yml.
# The user namespace derives from the generic webhook prefix, and the GitLab namespace
# is conditional on that service being enabled. Checks both switches reach the
# registration, not just config.yml.
- name: Assert the registration namespaces follow the enabled services
ansible.builtin.assert:
that:
@@ -176,8 +168,8 @@
# The listeners, live
# ------------------------------------------------------------------
# A helper container is used because the role publishes no host port, exactly
# as in a real deployment; see docs/molecule-testing.md.
# A helper container, because the role publishes no host port - exactly as in a real
# deployment. See docs/molecule-testing.md.
- name: Wait for the webhooks listener to answer on the port the role configured
ansible.builtin.command:
argv:
@@ -205,11 +197,10 @@
delay: 5
failed_when: false
# Hookshot answers an unknown webhook id from its generic-webhook handler,
# with a JSON body no other component would produce. An Express "Cannot POST"
# page here would mean the port is Hookshot's but the generic webhooks
# service was never mounted on it; a refused connection would mean the
# listener the role described was never opened at all.
# An unknown webhook id draws a JSON body from the generic-webhook handler that no
# other component would produce. An Express "Cannot POST" page would mean the port is
# Hookshot's but the generic webhooks service was never mounted on it; a refused
# connection would mean the listener was never opened at all.
- name: Assert the generic webhooks service is mounted on that listener
ansible.builtin.assert:
that:
@@ -222,9 +213,8 @@
({{ hookshot_webhooks_probe.stdout | default('no output') }})
success_msg: "The generic webhooks service answers on the port the role configured"
# Metrics are OFF in the role's defaults, so this listener exists only
# because the scenario asked for it - and /metrics answers in a format
# nothing else on that port could have produced.
# Metrics are OFF in the role's defaults, so this listener exists only because the
# scenario asked for it.
- name: Probe the metrics listener on the port the role configured
ansible.builtin.command:
argv:
@@ -253,8 +243,8 @@
metrics ({{ hookshot_metrics_probe.stdout | default('no output') | truncate(200) }})
success_msg: "The metrics listener serves Hookshot's own metrics"
# The appservice port is not in `listeners` - it comes from `bridge.port` -
# so it is a separate socket, opened by a separate part of the config.
# The appservice port is not in `listeners`; it comes from `bridge.port`.
# A separate socket, opened by a separate part of the config.
- name: Probe the appservice port the role configured
ansible.builtin.command:
argv:
@@ -284,10 +274,10 @@
({{ hookshot_appservice_probe.stdout | default('no output') }})
success_msg: "The appservice API answers on the port the role configured"
# The other half of the story. Every port above is one the scenario chose;
# these are the ones the role and Hookshot would have used if the scenario's
# configuration had never reached the process. If any of them answers, then
# a passing probe above proves much less than it looks like it does.
# The other half of the story. Every port above is one the scenario chose; these are
# the ones the role and Hookshot would have used had the scenario's configuration never
# reached the process. If any of them answers, the probes above prove much less than
# they appear to.
- name: Probe the ports the role's defaults would have used
ansible.builtin.command:
argv: