fix(spec): use a docker container with the original sim for testing

Author: stakach

.github/workflows/ci.yml

@@ -22,9 +22,10 @@ jobs:
       # Label used to access the service container
       snmpd:
         # Docker Hub image
-        image: polinux/snmpd
-        options: >-
-          -p 4000:161/udp
+        image: tandrup/snmpsim
+        # Not sure how to configure this correctly...
+        # env:
+        #   EXTRA_FLAGS="--v3-user=usr-md5-none --v3-auth-key=authkey1 --v3-auth-proto=MD5"
 
     steps:
     - uses: actions/checkout@v2

spec/client_spec.cr

@@ -2,22 +2,20 @@ require "./helper"
 
 describe SNMP::Client do
   it "should perform a walk" do
-    client = SNMP::Client.new(TEST_SNMP_SERVER, port: 4000)
+    client = SNMP::Client.new(TEST_SNMP_SERVER)
     client.should_not be_nil
     messages = client.walk("1.3.6.1.2.1.1.9.1.3")
     messages.should be_a(Array(SNMP::Message))
     messages.empty?.should be_false
-    messages.size.should eq 10
   end
 
   it "should perform a walk using a block" do
-    client = SNMP::Client.new(TEST_SNMP_SERVER, port: 4000)
+    client = SNMP::Client.new(TEST_SNMP_SERVER)
     client.should_not be_nil
     messages = [] of SNMP::Message
     client.walk("1.3.6.1.2.1.1.9.1.3") do |message|
       messages << message
     end
     messages.empty?.should be_false
-    messages.size.should eq 10
   end
 end

spec/snmp_spec.cr

@@ -268,11 +268,11 @@ describe SNMP do
   end
 
   it "should be able to query SNMPLabs with MD5 auth" do
-    pending!("need a replacement for snmpsim https://github.com/inexio/snmpsim")
+    pending!("not sure how to configure SNMPv3 on the simulator")
 
     # Connect to server
     socket = UDPSocket.new
-    socket.connect("demo.snmplabs.com", 161)
+    socket.connect(TEST_SNMP_SERVER, 161)
     socket.sync = false
     socket.read_timeout = 3
 
@@ -295,11 +295,11 @@ describe SNMP do
   end
 
   it "should be able to query SNMPLabs with MD5 and AES auth" do
-    pending!("need a replacement for snmpsim https://github.com/inexio/snmpsim")
+    pending!("not sure how to configure SNMPv3 on the simulator")
 
     # Connect to server
     socket = UDPSocket.new
-    socket.connect("demo.snmplabs.com", 161)
+    socket.connect(TEST_SNMP_SERVER, 161)
     socket.sync = false
     socket.read_timeout = 3
 
@@ -322,11 +322,11 @@ describe SNMP do
   end
 
   it "should be able to query SNMPLabs with MD5 and DES auth" do
-    pending!("need a replacement for snmpsim https://github.com/inexio/snmpsim")
+    pending!("not sure how to configure SNMPv3 on the simulator")
 
     # Connect to server
     socket = UDPSocket.new
-    socket.connect("demo.snmplabs.com", 161)
+    socket.connect(TEST_SNMP_SERVER, 161)
     socket.sync = false
     socket.read_timeout = 3
 
@@ -351,7 +351,7 @@ describe SNMP do
   it "should be able to query SNMPLabs with SNMPv2" do
     # Connect to server
     socket = UDPSocket.new
-    socket.connect(TEST_SNMP_SERVER, 4000)
+    socket.connect(TEST_SNMP_SERVER, 161)
     socket.sync = false
     socket.read_timeout = 3
 
@@ -362,16 +362,14 @@ describe SNMP do
 
     # Process response
     response = session.parse(socket.read_bytes(ASN1::BER))
-    response.value.get_string.should start_with("Root <root@localhost>")
+    response.value.get_string.should start_with("SNMP Laboratories")
   end
 
   it "should be able to set an OID on SNMPLabs with SNMPv2" do
-    pending!("need a replacement for snmpsim https://github.com/inexio/snmpsim")
-
     # Connect to server
     socket = UDPSocket.new
     # socket.connect("localhost", 32771)
-    socket.connect("demo.snmplabs.com", 161)
+    socket.connect(TEST_SNMP_SERVER, 161)
     socket.sync = false
     socket.read_timeout = 3