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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") }
}
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