re-add set_log_hook tests

Author: ruslandoga

lib/exqlite.ex

@@ -67,7 +67,6 @@ defmodule Exqlite do
     case Nif.open(path, flags) do
       {:ok, _conn} = ok -> ok
       {:error, reason} -> {:error, Error.exception(message: reason)}
-      {:error, code, name} -> {:error, Error.exception(code: code, codename: name)}
     end
   end
 

test/exqlite_test.exs

@@ -625,4 +625,62 @@ defmodule ExqliteTest do
       refute_receive _anything
     end
   end
+
+  describe "set_log_hook/1" do
+    setup do
+      {:ok, conn} = Exqlite.open(":memory:")
+      on_exit(fn -> Exqlite.close(conn) end)
+      {:ok, conn: conn}
+    end
+
+    test "can receive errors", %{conn: conn} do
+      assert :ok = Exqlite.set_log_hook(self())
+
+      assert {:error, %Exqlite.Error{message: "near \"some\": syntax error"}} =
+               Exqlite.prepare(conn, "some invalid sql")
+
+      assert_receive {:log, rc, msg}
+      assert rc == 1
+      assert msg == "near \"some\": syntax error in \"some invalid sql\""
+      refute_receive _anything_else
+    end
+
+    test "only one pid can listen at a time", %{conn: conn} do
+      assert :ok = Exqlite.set_log_hook(self())
+
+      task =
+        Task.async(fn ->
+          :ok = Exqlite.set_log_hook(self())
+
+          assert {:error, %Exqlite.Error{message: "near \"some\": syntax error"}} =
+                   Exqlite.prepare(conn, "some invalid sql")
+
+          assert_receive {:log, rc, msg}
+          assert rc == 1
+          assert msg == "near \"some\": syntax error in \"some invalid sql\""
+          refute_receive _anything_else
+        end)
+
+      Task.await(task)
+      refute_receive _anything_else
+    end
+
+    test "receives notifications from all connections", %{conn: conn1} do
+      assert :ok = Exqlite.set_log_hook(self())
+      assert {:ok, conn2} = Exqlite.open(":memory:")
+      on_exit(fn -> Exqlite.close(conn2) end)
+
+      assert {:error, _reason} = Exqlite.prepare(conn1, "some invalid sql 1")
+      assert_receive {:log, rc, msg}
+      assert rc == 1
+      assert msg == "near \"some\": syntax error in \"some invalid sql 1\""
+      refute_receive _anything_else
+
+      assert {:error, _reason} = Exqlite.prepare(conn2, "some invalid sql 2")
+      assert_receive {:log, rc, msg}
+      assert rc == 1
+      assert msg == "near \"some\": syntax error in \"some invalid sql 2\""
+      refute_receive _anything_else
+    end
+  end
 end