Graham McIntire
2f09b590e2
- Add ex_slop credo plugin with all 40 checks - Remove DualKeyAccess patterns across codebase — atom-only access - Fix LengthInGuard, LengthComparison, ListLast, ReduceMapPut in lib/ - Disable LengthComparison for test files - Remove obvious comments and narrator comments (~50) - Add missing aliases for fully-qualified modules - Rewrite boilerplate docs in test/support - Add normalize_keys helpers at API boundaries
78 lines
2.1 KiB
Elixir
78 lines
2.1 KiB
Elixir
defmodule Aprsme.DataCase do
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@moduledoc """
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Test case for data-layer tests.
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Imports Ecto helpers (`Ecto`, `Ecto.Changeset`, `Ecto.Query`) and
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provides utilities like `errors_on/1` for validating changesets.
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When the test case interacts with the database, the SQL sandbox is enabled
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so changes are reverted at the end of every test. PostgreSQL users can
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run database tests asynchronously by setting `use Aprsme.DataCase, async: true`.
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"""
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use ExUnit.CaseTemplate
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alias Ecto.Adapters.SQL.Sandbox
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using do
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quote do
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import Aprsme.DataCase
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# Import conveniences for testing with connections
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import Ecto
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import Ecto.Changeset
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import Ecto.Query
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# and other functionality to make calls such as:
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# import Aprsme.DataCase
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# Aprsme.DataCase.errors_on(MySchema.changeset(%MySchema{}, %{}))
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# The default import for Repo
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alias Aprsme.Repo
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end
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end
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setup tags do
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Aprsme.DataCase.setup_sandbox(tags)
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# Only seed devices for tests that need them
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if tags[:needs_devices] do
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Aprsme.DevicesSeeder.seed_from_json()
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end
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:ok
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end
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@doc """
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A helper that transforms changeset errors into a map of messages.
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errors_on(MySchema.changeset(%MySchema{}, %{field: bad_value}))
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%{field: ["has invalid value"]}
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"""
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def errors_on(changeset) do
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Ecto.Changeset.traverse_errors(changeset, &translate_error/1)
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end
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@doc """
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Sets up the sandbox and allows the test case
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to be run asynchronously.
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"""
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def setup_sandbox(tags) do
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pid = Sandbox.start_owner!(Aprsme.Repo, shared: not tags[:async])
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on_exit(fn -> Sandbox.stop_owner(pid) end)
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end
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defp translate_error({msg, opts}) do
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# You can make use of gettext to translate error messages by
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# uncommenting and adjusting the following code:
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# if count = opts[:count] do
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# Gettext.dngettext(AprsmeWeb.Gettext, "errors", msg, msg, count, opts)
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# else
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# Gettext.dgettext(AprsmeWeb.Gettext, "errors", msg, opts)
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# end
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Enum.reduce(opts, msg, fn {key, value}, acc ->
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String.replace(acc, "%{#{key}}", fn _ -> to_string(value) end)
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end)
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end
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end
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