Add tests

Author: crbelaus

test/error_tracker/ignorer_test.exs

@@ -0,0 +1,21 @@
+defmodule ErrorTracker.IgnorerTest do
+  use ErrorTracker.Test.Case
+
+  setup_all do
+    Application.put_env(:error_tracker, :ignorer, ErrorTracker.EveryErrorIgnorer)
+  end
+
+  test "ignores errors" do
+    refute report_error(fn -> raise "[IGNORE] Sample error" end)
+    assert report_error(fn -> raise "Sample error" end)
+  end
+end
+
+defmodule ErrorTracker.EveryErrorIgnorer do
+  @behaviour ErrorTracker.Ignorer
+
+  @impl true
+  def ignore?(error, _context) do
+    String.contains?(error.reason, "[IGNORE]")
+  end
+end