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|
defmodule Couch.Test.Suite do
@moduledoc """
Common code to configure ExUnit runner.
It replaces the usual invocation of `ExUnit.start()` in
`test_helper.exs` related to integration tests with:
```
Couch.Test.Suite.start()
```
"""
@doc """
This helper function can be used to create `suite.elixir`
as
```
tests =
Couch.Test.Suite.list()
|> Enum.sort()
|> Couch.Test.Suite.group_by()
IO.puts(Couch.Test.Suite.pretty_print(tests))
```
"""
def list() do
test_paths = Keyword.get(Mix.Project.config(), :test_paths, [])
Enum.reduce(test_paths, [], fn directory, acc ->
list(directory) ++ acc
end)
end
@doc """
This helper function can be used to create `suite.elixir`
as
```
tests =
Couch.Test.Suite.list(["test/elixir/test"])
|> Enum.sort()
|> Couch.Test.Suite.group_by()
IO.puts(Couch.Test.Suite.pretty_print(tests))
```
"""
def list(directory) do
ensure_exunit_started()
Enum.reduce(test_files(directory), [], fn file_path, acc ->
tests_in_file(file_path) ++ acc
end)
end
@doc """
This helper function is used in a snippet to create `suite.elixir`
see list/1
"""
def group_by(tests) do
tests |> Enum.group_by(&module_name/1, &test_name/1)
end
@doc """
This helper function is used in a snippet to create `suite.elixir`
see list/1
"""
def pretty_print(tests) do
tests = Enum.join(Enum.sort(Enum.map(tests, fn {module_name, test_names} ->
test_names = test_names
|> Enum.map(fn x -> ~s("#{x}") end) |> Enum.join(",\n ")
~s( "#{module_name}": [\n #{test_names}\n ])
end)), ",\n")
"%{\n#{tests}\n}"
end
def start(exclude \\ []) do
# If build number detected assume we running on Jenkins
# and skip certain tests that fail on jenkins.
default_exclude =
case System.get_env("BUILD_NUMBER") !== nil do
true -> [:pending, :skip_on_jenkins]
false -> [:pending]
end
current_exclude = Keyword.get(ExUnit.configuration(), :exclude, [])
{ignores, current_exclude} = from_file(current_exclude)
current_include = Keyword.get(ExUnit.configuration(), :include, [])
{suite, current_include} = from_file(current_include)
only_test_ids =
case suite -- ignores do
[] ->
nil
test_ids ->
to_tests(test_ids)
end
ExUnit.configure(
exclude: Enum.uniq(default_exclude ++ current_exclude ++ exclude),
include: current_include,
formatters: [JUnitFormatter, ExUnit.CLIFormatter],
only_test_ids: only_test_ids
)
ExUnit.start()
end
# Helpers for start/0
defp split_files(opts) do
{files, opts} =
Enum.split_with(opts, fn x ->
String.ends_with?(Atom.to_string(x), ".elixir")
end)
{Enum.map(files, &Atom.to_string/1), opts}
end
defp read_from_file(file_name) do
{map, _} = Code.eval_file(file_name)
map
|> Enum.reduce([], fn {module, tests}, acc ->
Enum.map(tests, &{module, &1}) ++ acc
end)
end
defp from_file(opts) do
case split_files(opts) do
{[], opts} ->
{[], opts}
{[file_name], opts} ->
{read_from_file(file_name), opts}
{_, _} ->
throw("Only one file is supported in --exclude or --include")
end
end
defp to_tests(ids) do
MapSet.new(
Enum.map(ids, fn {module_name, test_name} ->
{String.to_atom("Elixir.#{module_name}"), String.to_atom("test #{test_name}")}
end)
)
end
# Helpers for list/0
defp ensure_exunit_started() do
if not Process.get(EXUNIT_STARTED, false) do
started? =
Application.started_applications()
|> Enum.map(&Kernel.elem(&1, 0))
|> Enum.member?(:ex_unit)
if not started? do
ExUnit.start(autorun: false)
Process.get(EXUNIT_STARTED, true)
end
end
end
defp test_files(directory) do
files = Path.wildcard(Path.join(directory, "*_test.exs"))
Enum.filter(files, &File.regular?/1)
end
def tests_in_file(file_path) do
ensure_exunit_started()
Code.compiler_options(ignore_module_conflict: true)
tests =
Enum.reduce(require_file(file_path), [], fn {module_name, _}, acc ->
if :erlang.function_exported(module_name, :__ex_unit__, 0) do
module_name.__ex_unit__().tests ++ acc
else
acc
end
end)
Code.unrequire_files([file_path])
tests
end
def require_file(file_path) do
drop_stderr(fn ->
Code.require_file(file_path)
end)
end
defp drop_stderr(fun) do
{:ok, pid} = StringIO.open("")
original_pid = Process.whereis(:standard_error)
try do
Process.unregister(:standard_error)
Process.register(pid, :standard_error)
fun.()
after
Process.unregister(:standard_error)
Process.register(original_pid, :standard_error)
StringIO.close(pid)
end
end
defp test_name(test) do
String.replace_leading(Atom.to_string(test.name), "test ", "")
end
defp module_name(test) do
test.module
|> Atom.to_string()
|> String.replace_leading("Elixir.", "")
end
end
|