83 lines
2.6 KiB
Elixir
83 lines
2.6 KiB
Elixir
defmodule Blogex.MutationConfigTest do
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# The mutation sensor is opt-in: a dependency and two aliases, deliberately
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# absent from `make verify`'s VERIFY_SENSORS. These pins keep the wiring
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# honest (dev/test only, never runtime) and keep the aliases reading the
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# scope files rather than duplicating a list in mix.exs.
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use ExUnit.Case
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test "muex is a dev/test-only, non-runtime dependency" do
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deps = Mix.Project.config()[:deps]
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assert {:muex, requirement, opts} = dep!(deps, :muex)
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assert requirement =~ "0.12"
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assert opts[:only] == [:dev, :test]
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assert opts[:runtime] == false
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end
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test "mutate and mutate.fast aliases are defined" do
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aliases = Mix.Project.config()[:aliases]
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assert is_function(aliases[:mutate], 1)
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assert is_function(aliases[:"mutate.fast"], 1)
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end
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test "mutation args always include the scope, the curated mutators and --fail-at 0" do
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args = Blogex.MixProject.mutation_args("mutation_scope_fast.txt", [])
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scope = Blogex.MixProject.read_mutation_scope("mutation_scope_fast.txt")
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assert "--fail-at" in args
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assert Enum.at(args, Enum.find_index(args, &(&1 == "--fail-at")) + 1) == "0"
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assert files_arg(args) == Enum.join(scope, ",")
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mutators = Enum.at(args, Enum.find_index(args, &(&1 == "--mutators")) + 1)
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assert mutators ==
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"arithmetic,boolean,comparison,conditional,function_call,literal,return_value"
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end
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test "extra CLI args pass through so a single file can be targeted" do
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args =
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Blogex.MixProject.mutation_args("mutation_scope_fast.txt", ["--files", "lib/blogex/seo.ex"])
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assert args
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|> Enum.chunk_every(2, 1, :discard)
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|> Enum.any?(fn
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["--files", "lib/blogex/seo.ex"] -> true
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_ -> false
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end)
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end
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test "an empty scope fails loudly instead of running over nothing" do
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path =
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Path.join(System.tmp_dir!(), "muex-empty-scope-#{System.unique_integer([:positive])}.txt")
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File.write!(path, "\n \n")
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on_exit(fn -> File.rm(path) end)
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assert_raise Mix.Error, ~r/empty/, fn ->
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Blogex.MixProject.read_mutation_scope(path)
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end
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end
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defp dep!(deps, name) do
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case Enum.find(deps, fn
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{^name, _requirement} -> true
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{^name, _requirement, _opts} -> true
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_ -> false
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end) do
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{^name, requirement} -> {name, requirement, []}
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{^name, requirement, opts} -> {name, requirement, opts}
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nil -> flunk("expected #{inspect(name)} in deps/0")
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end
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end
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defp files_arg(args) do
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args
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|> Enum.chunk_every(2, 1, :discard)
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|> Enum.find_value(fn
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["--files", files] -> files
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_ -> nil
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end)
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end
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end
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