update test procedue in Makefile

Makefile

@@ -8,6 +8,12 @@ ext:
 	python setup.py build_ext --inplace
 
 test:
+	make clean
+	@echo ""
+	@echo "[Test with py_common]"
+	python -m pytest tests
+	@echo ""
+	@echo "[Test with c_common]"
 	python setup.py build_ext --inplace
 	python -m pytest tests
 

tests/test_c_common.py

@@ -1,13 +1,12 @@
-from pyModeS import c_common
+try:
+    from pyModeS import c_common
 
-
-def test_conversions():
+    def test_conversions():
         assert c_common.hex2bin("6E") == "01101110"
         assert c_common.bin2hex("01101110") == "6E"
         assert c_common.bin2hex("1101110") == "6E"
 
-
-def test_crc_decode():
+    def test_crc_decode():
 
         assert c_common.crc("8D406B902015A678D4D220AA4BDA") == 0
         assert c_common.crc("8d8960ed58bf053cf11bc5932b7d") == 0
@@ -23,28 +22,23 @@ def test_crc_decode():
         assert c_common.crc("8d4ca251204994b1c36e60a5343d") == 16
         assert c_common.crc("b0001718c65632b0a82040715b65") == 353333
 
-
-def test_crc_encode():
+    def test_crc_encode():
         parity = c_common.crc("8D406B902015A678D4D220AA4BDA", encode=True)
         assert parity == 11160538
 
-
-def test_icao():
+    def test_icao():
         assert c_common.icao("8D406B902015A678D4D220AA4BDA") == "406B90"
         assert c_common.icao("A0001839CA3800315800007448D9") == "400940"
         assert c_common.icao("A000139381951536E024D4CCF6B5") == "3C4DD2"
         assert c_common.icao("A000029CFFBAA11E2004727281F1") == "4243D0"
 
-
-def test_modes_altcode():
+    def test_modes_altcode():
         assert c_common.altcode("A02014B400000000000000F9D514") == 32300
 
-
-def test_modes_idcode():
+    def test_modes_idcode():
         assert c_common.idcode("A800292DFFBBA9383FFCEB903D01") == "1346"
 
-
-def test_graycode_to_altitude():
+    def test_graycode_to_altitude():
         assert c_common.gray2alt("00000000010") == -1000
         assert c_common.gray2alt("00000001010") == -500
         assert c_common.gray2alt("00000011011") == -100
@@ -60,3 +54,7 @@ def test_graycode_to_altitude():
         assert c_common.gray2alt("11011110100") == 73200
         assert c_common.gray2alt("10000000011") == 126600
         assert c_common.gray2alt("10000000001") == 126700
+
+
+except:
+    pass