fix: don't expect specific FS error (not portable)

appveyor.yml

@@ -34,4 +34,4 @@ deploy: false
 
 test_script:
   - go build github.com/pact-foundation/pact-go
-  - for /f "" %%G in ('go list github.com/pact-foundation/pact-go/... ^| find /i /v "/vendor/"') do ( go test %%G & IF ERRORLEVEL == 1 EXIT 1)
+  - for /f "" %%G in ('go list github.com/pact-foundation/pact-go/... ^| find /i /v "/vendor/"') do ( go test -v %%G & IF ERRORLEVEL == 1 EXIT 1)

daemon/mock_service.go

@@ -20,6 +20,7 @@ func (m *MockService) NewService(args []string) (int, Service) {
 	log.Println("[DEBUG] starting mock service on port:", port)
 
 	m.Args = []string{
+		"service",
 		"--port",
 		fmt.Sprintf("%d", port),
 	}

dsl/publish_test.go

@@ -175,7 +175,7 @@ func TestPublish_validate(t *testing.T) {
 	}
 
 	err = p.validate()
-	if err != nil {
+	if err == nil {
 		t.Fatal("Expected error but got none")
 	}