 
   test "log/2 prunes bad unicode chars" do
     assert capture_log(fn ->
-      assert Logger.log(:debug, "he" <> <<185>> <> "lo") == :ok
-    end) =~ "he�lo"
+             assert Logger.log(:debug, "he" <> <<185>> <> "lo") == :ok
+           end) =~ "he�lo"
   end
 
   test "log/2 relies on sync_threshold" do


  test "set application metadata at compile time" do
    Logger.configure(compile_time_application: nil)
    defmodule SampleNoApp do
      def info do
        Logger.info "hello"
      end
    end

    assert capture_log(fn ->
      assert SampleNoApp.info == :ok
    end) =~ msg("module=LoggerTest.SampleNoApp [info]  hello")

    Logger.configure(compile_time_application: :sample_app)
    defmodule SampleApp do
      def info do
        Logger.info "hello"
      end
    end

    assert capture_log(fn ->
      assert SampleApp.info == :ok
    end) =~ msg("application=sample_app module=LoggerTest.SampleApp [info]  hello")
  after
    Logger.configure(compile_time_application: nil)
  end

  test "log/2 truncates messages" do
    Logger.configure(truncate: 4)
    assert capture_log(fn ->
      Logger.log(:debug, "hello")
    end) =~ "hell (truncated)"
  after
    Logger.configure(truncate: 8096)
  end

  test "log/2 with to_string/1 conversion" do
    Logger.configure(truncate: 4)
    assert capture_log(fn ->
      Logger.log(:debug, :hello)
    end) =~ "hell (truncated)"
  after
    Logger.configure(truncate: 8096)
  end

  end

  test "level/0" do
    assert Logger.level() == :debug
  end

  test "process metadata" do
    assert Logger.metadata(data: true) == :ok
    assert Logger.metadata() == [data: true]
    assert Logger.metadata(data: true) == :ok
    assert Logger.metadata() == [data: true]
    assert Logger.metadata(meta: 1) == :ok
    metadata = Logger.metadata()
    assert Enum.sort(metadata) == [data: true, meta: 1]
    assert Logger.metadata(data: nil) == :ok
    assert Logger.metadata() == [meta: 1]

    assert Logger.reset_metadata(meta: 2) == :ok
    assert Logger.metadata() == [meta: 2]
    assert Logger.reset_metadata(data: true, app: nil) == :ok
    assert Logger.metadata() == [data: true]
    assert Logger.reset_metadata() == :ok
    assert Logger.metadata() == []
  end

  test "metadata merge" do
    assert Logger.metadata(module: Sample) == :ok

    assert capture_log(fn ->
             assert Logger.bare_log(:info, "ok", application: nil, module: LoggerTest) == :ok
           end) =~ msg("application= module=LoggerTest [info]  ok")
  end

  test "metadata merge when the argument function returns metadata" do
    assert Logger.metadata(module: Sample) == :ok

    fun = fn -> {"ok", [module: "Function"]} end

    assert capture_log(fn ->
             assert Logger.bare_log(:info, fun, application: nil, module: LoggerTest) == :ok
           end) =~ msg("application= module=Function [info]  ok")
  end

  test "enable/1 and disable/1" do
    assert Logger.metadata([]) == :ok

    assert capture_log(fn ->
             assert Logger.debug("hello", []) == :ok
           end) =~ msg_with_meta("[debug] hello")

    assert Logger.disable(self()) == :ok

    assert capture_log(fn ->
             assert Logger.debug("hello", []) == :ok
           end) == ""

    assert Logger.metadata([]) == :ok

    assert capture_log(fn ->
             assert Logger.debug("hello", []) == :ok
           end) == ""

    assert Logger.enable(self()) == :ok

    assert capture_log(fn ->
             assert Logger.debug("hello", []) == :ok
           end) =~ msg_with_meta("[debug] hello")
  end

  test "compare_levels/2" do
    assert Logger.compare_levels(:debug, :debug) == :eq
    assert Logger.compare_levels(:debug, :info) == :lt
    assert Logger.compare_levels(:debug, :warn) == :lt
    assert Logger.compare_levels(:debug, :error) == :lt

    assert Logger.compare_levels(:info, :debug) == :gt
    assert Logger.compare_levels(:info, :info) == :eq
    assert Logger.compare_levels(:info, :warn) == :lt
    assert Logger.compare_levels(:info, :error) == :lt

    assert Logger.compare_levels(:warn, :debug) == :gt
    assert Logger.compare_levels(:warn, :info) == :gt
    assert Logger.compare_levels(:warn, :warn) == :eq
    assert Logger.compare_levels(:warn, :error) == :lt

    assert Logger.compare_levels(:error, :debug) == :gt
    assert Logger.compare_levels(:error, :info) == :gt
    assert Logger.compare_levels(:error, :warn) == :gt
    assert Logger.compare_levels(:error, :error) == :eq
  end

  test "debug/2" do
    assert capture_log(fn ->
             assert Logger.debug("hello", []) == :ok
           end) =~ msg_with_meta("[debug] hello")

    assert capture_log(:info, fn ->
             assert Logger.debug("hello", []) == :ok
           end) == ""
  end

  test "info/2" do
    assert capture_log(fn ->
             assert Logger.info("hello", []) == :ok
           end) =~ msg_with_meta("[info]  hello")

    assert capture_log(:warn, fn ->
             assert Logger.info("hello", []) == :ok
           end) == ""
  end

  test "warn/2" do
    assert capture_log(fn ->
             assert Logger.warn("hello", []) == :ok
           end) =~ msg_with_meta("[warn]  hello")

    assert capture_log(:error, fn ->
             assert Logger.warn("hello", []) == :ok
           end) == ""
  end

  test "error/2" do
    assert capture_log(fn ->
             assert Logger.error("hello", []) == :ok
           end) =~ msg_with_meta("[error] hello")
  end

  test "remove unused calls at compile time" do
