Added test for DNC in value and in Config

tests/board_samples/kibom-test-rep.sch

@@ -75,4 +75,27 @@ F 4 "" H 2900 3600 50  0001 C CNN "Config"
 	5    2900 3600
 	1    0    0    -1  
 $EndComp
+$Comp
+L Device:R R1
+U 1 1 5F331BEB
+P 4200 2000
+F 0 "R1" H 4270 2046 50  0000 L CNN
+F 1 "DNC" H 4270 1955 50  0000 L CNN
+F 2 "" V 4130 2000 50  0001 C CNN
+F 3 "~" H 4200 2000 50  0001 C CNN
+	1    4200 2000
+	1    0    0    -1  
+$EndComp
+$Comp
+L Device:R R2
+U 1 1 5F3321E0
+P 4200 2350
+F 0 "R2" H 4270 2396 50  0000 L CNN
+F 1 "100" H 4270 2305 50  0000 L CNN
+F 2 "" V 4130 2350 50  0001 C CNN
+F 3 "~" H 4200 2350 50  0001 C CNN
+F 4 "DNF, DNC" H 4200 2350 50  0001 C CNN "Config"
+	1    4200 2350
+	1    0    0    -1  
+$EndComp
 $EndSCHEMATC

tests/test_plot/test_int_bom.py

@@ -31,7 +31,6 @@ Tests of Internal BoM files
 
 Missing:
 - Variants
-- test_regex
 - number_boards
 - hide_headers
 - hide_pcb_info
@@ -540,7 +539,10 @@ def test_int_bom_repeat_csv():
     out = prj + '-bom.' + ext
     rows, header = ctx.load_csv(out)
     assert header == KIBOM_TEST_HEAD
-    check_kibom_test_netlist(rows, header.index(REF_COLUMN_NAME), 1, [], ['U1'])
+    ref_column = header.index(REF_COLUMN_NAME)
+    qty_column = header.index(QTY_COLUMN_NAME)
+    check_kibom_test_netlist(rows, ref_column, 2, ['R2'], ['U1', 'R1'])
+    check_dnc(rows, 'R1', ref_column, qty_column)
     ctx.clean_up()