ADD. adding network.py module unittests for better coverage

Author: daehan-koreapool

test/pycardano/test_network.py

@@ -0,0 +1,32 @@
+import pytest
+
+from pycardano.exception import DeserializeException
+from pycardano.network import Network
+
+
+def test_from_primitive_invalid_primitive_input():
+    value = "a string value"
+    with pytest.raises(DeserializeException):
+        Network.from_primitive(value)
+
+
+def test_from_primitive_testnet():
+    testnet_value = 0
+    network = Network.from_primitive(testnet_value)
+    assert network.value == testnet_value
+
+
+def test_from_primitive_mainnet():
+    mainnet_value = 1
+    network = Network.from_primitive(mainnet_value)
+    assert network.value == mainnet_value
+
+
+def test_to_primitive_testnet():
+    network = Network(0)
+    assert network.to_primitive() == 0
+
+
+def test_to_primitive_mainnet():
+    network = Network(1)
+    assert network.to_primitive() == 1