ported SketchWithFakeFunctionPointer from legacy into integration test

internal/integrationtest/compile_4/compile_test.go

@@ -112,6 +112,7 @@ func TestCompileOfProblematicSketches(t *testing.T) {
 		{"SketchWithMultilinePrototypes", testBuilderSketchWithMultilinePrototypes},
 		{"SketchWithExternCMultiline", testBuilderSketchWithExternCMultiline},
 		{"SketchWithMultilineTemplate", testBuilderSketchWithMultilineTemplate},
+		{"SketchWithFakeFunctionPointer", testBuilderSketchWithFakeFunctionPointer},
 	}.Run(t, env, cli)
 }
 
@@ -725,6 +726,21 @@ func testBuilderSketchWithMultilineTemplate(t *testing.T, env *integrationtest.E
 	})
 }
 
+func testBuilderSketchWithFakeFunctionPointer(t *testing.T, env *integrationtest.Environment, cli *integrationtest.ArduinoCLI) {
+	t.Run("Build", func(t *testing.T) {
+		// Build
+		_, err := tryBuild(t, env, cli, "arduino:avr:leonardo")
+		require.NoError(t, err)
+	})
+
+	t.Run("Preprocess", func(t *testing.T) {
+		// Preprocess
+		sketchPath, preprocessedSketch, err := tryPreprocess(t, env, cli, "arduino:avr:leonardo")
+		require.NoError(t, err)
+		comparePreprocessGoldenFile(t, sketchPath, preprocessedSketch)
+	})
+}
+
 type builderOutput struct {
 	CompilerOut   string `json:"compiler_out"`
 	CompilerErr   string `json:"compiler_err"`

internal/integrationtest/compile_4/testdata/SketchWithFakeFunctionPointer/SketchWithFakeFunctionPointer.preprocessed.txt

@@ -0,0 +1,27 @@
+#include <Arduino.h>
+#line 1 "{{QuoteCppString .sketchMainFile}}"
+template< uint16_t nBuffSize >
+  class Foo{
+    public: 
+
+    template< uint16_t N >
+      Foo &operator +=( const Foo<N> &ref ){
+        //...
+        return *this;
+    }
+};
+
+Foo<64> a;
+Foo<32> b;
+
+#line 15 "{{QuoteCppString .sketchMainFile}}"
+void setup();
+#line 19 "{{QuoteCppString .sketchMainFile}}"
+void loop();
+#line 15 "{{QuoteCppString .sketchMainFile}}"
+void setup(){
+  a += b;
+}
+
+void loop(){}
+

legacy/builder/test/try_build_of_problematic_sketch_test.go

@@ -29,10 +29,6 @@ import (
 
 // TODO add them in the compile_4
 
-func TestTryBuild042(t *testing.T) {
-	tryBuild(t, paths.New("sketch_with_fake_function_pointer", "sketch_with_fake_function_pointer.ino"))
-}
-
 func TestTryBuild036(t *testing.T) {
 	ctx := makeDefaultContext()
 	tryBuildWithContext(t, ctx, "arduino:samd:arduino_zero_native", paths.New("sketch_fastleds", "sketch_fastleds.ino"))