Added new tests for NetworkcacheClient class.

This is the first version has only basic tests.

The new test class aims to test the behavior of NetworkcacheClient
class. And it is forbidden to change any behavior of
NetworkcacheClient without writting/editing the tests.

NOTE: still WIP...

slapos/libnetworkcachetests.py

@@ -81,3 +81,59 @@ class GenerateSignatureScriptTest(LibNetworkCacheMixin):
     '''
     self.assertTrue(os.path.exists(self.signature_certificate_file))
     self.assertTrue(os.path.exists(self.signature_private_key_file))
+
+
+class TestNetworkcacheClient(LibNetworkCacheMixin):
+  """
+    Class to test the NetworkcacheClient implementation.
+  """
+
+  def setUp(self):
+    """ Setup the test. """
+    LibNetworkCacheMixin.setUp(self)
+    self.host = 'localhost'
+    self.port = 8000
+    self.shacache_path = '/shacache'
+    self.shadir_path = '/shadir'
+    url = 'http://%s:%s' % (self.host, self.port)
+    self.shacache_url = url + self.shacache_path
+    self.shadir_url = url + self.shadir_path
+    self.nc = NetworkcacheClient(shacache=self.shacache_url,
+                                 shadir=self.shadir_url)
+
+  def test_init_method_normal_http_url(self):
+    """
+      Check if the init method is setting the attributes correctly.
+    """
+    self.assertEquals({'Content-Type': 'application/json'}, \
+                          self.nc.shacache_header_dict)
+    self.assertEquals(self.host, self.nc.shacache_host)
+    self.assertEquals(self.shacache_path, self.nc.shacache_path)
+    self.assertEquals(self.port, self.nc.shacache_port)
+    self.assertEquals(self.shacache_url, self.nc.shacache_url)
+
+    self.assertEquals({'Content-Type': 'application/json'}, \
+                         self.nc.shadir_header_dict)
+    self.assertEquals(self.host, self.nc.shadir_host)
+    self.assertEquals(self.shadir_path, self.nc.shadir_path)
+    self.assertEquals(self.port, self.nc.shadir_port)
+
+  def test_signature_creation_without_private_key_file(self):
+    """
+      Without the private key file, it is not possible to create the 
+      signature so it must 
+    """
+    nc = NetworkcacheClient(
+                   shacache=self.shacache_url,
+                   shadir=self.shadir_url)
+    self.assertEquals('', nc._getSignatureString())
+
+  def test_signature_creation_with_private_key_file(self):
+    """
+      Check if the signature creation does not have any error.
+    """
+    nc = NetworkcacheClient(
+                   shacache=self.shacache_url,
+                   shadir=self.shadir_url,
+                   signature_private_key_file=self.signature_private_key_file)
+    self.assertNotEquals('', nc._getSignatureString())