chore(tests): Mock LLM in tests for PRs

This saves time when testing on CPU which is the only sensible thing
to do on GitHub CI for PRs. For releases or once the commit is merged
we could use an external runner with GPU or just wait.

Signed-off-by: Richard Palethorpe <io@richiejp.com>

core/agent/agent_suite_test.go

@@ -1,6 +1,7 @@
 package agent_test
 
 import (
+	"net/url"
 	"os"
 	"testing"
 
@@ -13,15 +14,19 @@ func TestAgent(t *testing.T) {
 	RunSpecs(t, "Agent test suite")
 }
 
-var testModel = os.Getenv("LOCALAGI_MODEL")
-var apiURL = os.Getenv("LOCALAI_API_URL")
-var apiKeyURL = os.Getenv("LOCALAI_API_KEY")
+var (
+	testModel      = os.Getenv("LOCALAGI_MODEL")
+	apiURL         = os.Getenv("LOCALAI_API_URL")
+	apiKey         = os.Getenv("LOCALAI_API_KEY")
+	useRealLocalAI bool
+	clientTimeout  = "10m"
+)
+
+func isValidURL(u string) bool {
+	parsed, err := url.ParseRequestURI(u)
+	return err == nil && parsed.Scheme != "" && parsed.Host != ""
+}
 
 func init() {
-	if testModel == "" {
-		testModel = "hermes-2-pro-mistral"
-	}
-	if apiURL == "" {
-		apiURL = "http://192.168.68.113:8080"
-	}
+	useRealLocalAI = isValidURL(apiURL) && apiURL != "" && testModel != ""
 }