1 files changed, 58 insertions, 0 deletions
diff --git a/internal/lsp/completion_codex_path_test.go b/internal/lsp/completion_codex_path_test.go
new file mode 100644
index 0000000..65ab75a
--- /dev/null
+++ b/internal/lsp/completion_codex_path_test.go
@@ -0,0 +1,58 @@
+package lsp
+
+import (
+    "context"
+    "errors"
+    "testing"
+
+    "hexai/internal/llm"
+)
+
+// fakeCodeLLM implements both llm.Client and llm.CodeCompleter.
+type fakeCodeLLM struct{
+    codeCalls int
+    chatCalls int
+    result    string
+    codeErr   error
+}
+
+func (f *fakeCodeLLM) CodeCompletion(_ context.Context, _ string, _ string, n int, _ string, _ float64) ([]string, error) {
+    f.codeCalls++
+    if f.codeErr != nil { return nil, f.codeErr }
+    if n <= 0 { n = 1 }
+    out := make([]string, n)
+    for i := 0; i < n; i++ { out[i] = f.result }
+    return out, nil
+}
+
+func (f *fakeCodeLLM) Chat(_ context.Context, _ []llm.Message, _ ...llm.RequestOption) (string, error) {
+    f.chatCalls++
+    return "chat", nil
+}
+func (f *fakeCodeLLM) Name() string         { return "fake" }
+func (f *fakeCodeLLM) DefaultModel() string { return "m" }
+
+func TestTryLLMCompletion_PrefersCodeCompleterOverChat(t *testing.T) {
+    s := &Server{ maxTokens: 32, triggerChars: []string{"."}, compCache: make(map[string]string) }
+    fake := &fakeCodeLLM{ result: "DoThing()" }
+    s.llmClient = fake
+    line := "obj."
+    p := CompletionParams{ Position: Position{ Line: 0, Character: len(line) }, TextDocument: TextDocumentIdentifier{URI: "file://x.go"} }
+    items, ok := s.tryLLMCompletion(p, "", line, "", "", "", false, "")
+    if !ok || len(items) == 0 { t.Fatalf("expected completion items via CodeCompleter path") }
+    if fake.codeCalls == 0 { t.Fatalf("expected CodeCompletion to be called") }
+    if fake.chatCalls != 0 { t.Fatalf("did not expect Chat fallback when CodeCompletion succeeds") }
+}
+
+func TestTryLLMCompletion_FallsBackToChatOnCodeCompleterError(t *testing.T) {
+    s := &Server{ maxTokens: 32, triggerChars: []string{"."}, compCache: make(map[string]string) }
+    fake := &fakeCodeLLM{ result: "DoThing()", codeErr: errors.New("boom") }
+    s.llmClient = fake
+    line := "obj."
+    p := CompletionParams{ Position: Position{ Line: 0, Character: len(line) }, TextDocument: TextDocumentIdentifier{URI: "file://y.go"} }
+    items, ok := s.tryLLMCompletion(p, "", line, "", "", "", false, "")
+    if !ok { t.Fatalf("expected ok=true even on fallback path") }
+    if len(items) == 0 { t.Fatalf("expected some items from Chat fallback") }
+    if fake.codeCalls == 0 { t.Fatalf("expected CodeCompletion to be attempted first") }
+    if fake.chatCalls == 0 { t.Fatalf("expected Chat fallback to be called when CodeCompletion errors") }
+}