Added some tests and function definition

b_asic/signal_flow_graph.py

@@ -543,6 +543,12 @@ class SFG(AbstractOperation):
         # Recreate the newly coupled SFG so that all attributes are correct.
         return sfg_copy()
 
+    def explode(self) -> Tuple[Sequence[Signal, Sequence[Signal]], Sequence[Tuple[Signal, Sequence[Signal]]]:
+    """Destroy the sfg by making it unusable in the future and 
+    return all of the intermidetry operations, the input operations and the output operations.
+    """
+    return
+
     def _evaluate_source(self, src: OutputPort, results: MutableOutputMap, registers: MutableRegisterMap, prefix: str) -> Number:
         src_prefix = prefix
         if src_prefix:

test/test_sfg.py

@@ -319,6 +319,22 @@ class TestInsertComponent:
         assert _sfg.find_by_name("bfly2")[0].input(0).signals[0].source.operation is _sfg.find_by_name("n_bfly")[0]
         assert _sfg.find_by_name("bfly2")[0].input(1).signals[0].source.operation is _sfg.find_by_name("n_bfly")[0]
 
+class TestExplode:
+    def test_correct_lengths(self, large_operation_tree):
+        sfg = SFG(outputs=[Output(large_operation_tree)])
+        operations, inputs, outputs = sfg.explode()
+        assert len(operations) == 3
+        assert len(inputs) == 4
+        assert len(outputs) == 1
+
+    def test_sfg_unusable(self, large_operation_tree):
+        sfg = SFG(outputs=[Output(large_operation_tree)])
+        sfg.explode()
+        assert sfg is None
+
+    def test_functions_of_sfg_used(self):
+        with pytest.raises(AssertionError):
+            pass
         
 class TestFindComponentsWithTypeName:
     def test_mac_components(self):