Test has capability

plugins/commands/serve/service/guest_service.rb

@@ -102,7 +102,7 @@ module VagrantPlugins
           ServiceInfo.with_info(ctx) do |info|
             cap_name = req.args.detect { |a|
               a.type == "hashicorp.vagrant.sdk.Args.NamedCapability"
-            }&.value&.value.strip.gsub("\b", "")
+            }&.value&.value.strip.gsub("\b", "").gsub("\x05", "")
             plugin_name = info.plugin_name
             LOGGER.debug("checking for #{cap_name} capability in #{plugin_name}")
 

test/unit/plugins/commands/serve/service/guest_service_test.rb

@@ -112,4 +112,65 @@ describe VagrantPlugins::CommandServe::Service::GuestService do
       expect(d.detected).to be false
     end
   end
+
+  context "requesting has capability" do
+    before do
+      cap_guest = Class.new(Vagrant.plugin("2", :guest)) do
+        def detect?(machine)
+          true
+        end
+      end
+  
+      register_plugin do |p|
+        p.guest(:cap_guest) { cap_guest }
+        p.guest_capability(:cap_guest, :mycap) do
+          "this is a capability"
+        end
+      end
+    end
+
+    let(:named_cap_request){ 
+      Hashicorp::Vagrant::Sdk::FuncSpec::Args.new(
+        args: [
+          Hashicorp::Vagrant::Sdk::FuncSpec::Value.new(
+            name: "", 
+            type: "hashicorp.vagrant.sdk.Args.NamedCapability", 
+            value: Google::Protobuf::Any.pack(Hashicorp::Vagrant::Sdk::Args::NamedCapability.new(Capability:"mycap")))
+        ]
+      )
+    }
+
+    let(:named_cap_bad_request){ 
+      Hashicorp::Vagrant::Sdk::FuncSpec::Args.new(
+        args: [
+          Hashicorp::Vagrant::Sdk::FuncSpec::Value.new(
+            name: "", 
+            type: "hashicorp.vagrant.sdk.Args.NamedCapability", 
+            value: Google::Protobuf::Any.pack(Hashicorp::Vagrant::Sdk::Args::NamedCapability.new(Capability:"notacapability")))
+        ]
+      )
+    }
+
+    it "generates a spec" do
+      spec = subject.has_capability_spec
+      expect(spec).not_to be_nil
+    end
+
+    it "raises an error for unknown plugins" do
+      ctx = DummyContext.new("idontexisthahaha")
+      expect { subject.has_capability(test_cap_name, ctx) }.to raise_error
+    end
+
+    it "returns true for plugin with capability" do
+      ctx = DummyContext.new("cap_guest")
+      d = subject.has_capability(named_cap_request, ctx)
+      expect(d.has_capability).to be true
+    end
+
+    it "returns false for plugin without capability" do
+      ctx = DummyContext.new("cap_guest")
+      d = subject.has_capability(named_cap_bad_request, ctx)
+      expect(d.has_capability).to be false
+    end
+  end
 end