From 927b950dec46afb22cad80821a09c89654315be8 Mon Sep 17 00:00:00 2001
From: Erki <erki@sullnet.me>
Date: Mon, 12 Dec 2022 00:12:07 +0200
Subject: [PATCH] Utility: update filter unit tests with decoupling test.

---
 Tests/filters.cpp               | 13 +++++++++++++
 Utility/Inc/utility_ifilter.hpp |  2 +-
 2 files changed, 14 insertions(+), 1 deletion(-)

diff --git a/Tests/filters.cpp b/Tests/filters.cpp
index 8acd908..d1c4049 100644
--- a/Tests/filters.cpp
+++ b/Tests/filters.cpp
@@ -123,6 +123,19 @@ TEST_CASE("Two filters can be linked together.")
       REQUIRE(high_pass.currentValue() == 46);
     }
   }
+
+  SECTION("Decoupling filters works as expected.")
+  {
+    high_pass.update(60);
+    REQUIRE(high_pass.currentValue() == 0);
+
+    high_pass.clearPrecedingFilter();
+    high_pass.update(60);
+    REQUIRE(high_pass.currentValue() == 60);
+
+    high_pass.update(30);
+    REQUIRE(high_pass.currentValue() == 60);
+  }
 }
 
 TEST_CASE("Median filter works as expected.")
diff --git a/Utility/Inc/utility_ifilter.hpp b/Utility/Inc/utility_ifilter.hpp
index b321832..2c454ce 100644
--- a/Utility/Inc/utility_ifilter.hpp
+++ b/Utility/Inc/utility_ifilter.hpp
@@ -12,7 +12,7 @@ template<typename T>
 class IFilter
 {
 public:
-  virtual ~IFilter() {}
+  virtual ~IFilter() = default;
 
   void assignPrecedingFilter(IFilter<T>& filter)
   {