package diagnostics_test
// note: clangd doesn't support pull diagnostics (textdocument/diagnostic)
// see: https://github.com/clangd/clangd/issues/2108
import (
"context"
"path/filepath"
"strings"
"testing"
"time"
"github.com/isaacphi/mcp-language-server/integrationtests/tests/clangd/internal"
"github.com/isaacphi/mcp-language-server/integrationtests/tests/common"
"github.com/isaacphi/mcp-language-server/internal/tools"
)
// TestDiagnostics tests diagnostics functionality with the Clangd language server
func TestDiagnostics(t *testing.T) {
// Helper function to open all files and wait for indexing
openAllFilesAndWait := func(suite *common.TestSuite, ctx context.Context) {
// Open one file so that clangd loads compiles commands and begins indexing
filesToOpen := []string{
"src/main.cpp",
}
for _, file := range filesToOpen {
filePath := filepath.Join(suite.WorkspaceDir, file)
err := suite.Client.OpenFile(ctx, filePath)
if err != nil {
// Don't fail the test, some files might not exist in certain tests
t.Logf("Note: Failed to open %s: %v", file, err)
}
}
// Wait for indexing to complete. clangd won't index files until they are opened.
time.Sleep(10 * time.Second)
}
// Test with a clean file
t.Run("CleanFile", func(t *testing.T) {
// Get a test suite with clean code
suite := internal.GetTestSuite(t)
ctx, cancel := context.WithTimeout(suite.Context, 10*time.Second)
defer cancel()
// Open all files and wait for clangd to index them
openAllFilesAndWait(suite, ctx)
filePath := filepath.Join(suite.WorkspaceDir, "src/clean.cpp")
result, err := tools.GetDiagnosticsForFile(ctx, suite.Client, filePath, 2, true)
if err != nil {
t.Fatalf("GetDiagnosticsForFile failed: %v", err)
}
// Verify we have no diagnostics
if !strings.Contains(result, "No diagnostics found") {
t.Errorf("Expected no diagnostics but got: %s", result)
}
common.SnapshotTest(t, "clangd", "diagnostics", "clean", result)
})
// Test with a file containing an error
t.Run("FileWithError", func(t *testing.T) {
// Get a test suite with code that contains errors
suite := internal.GetTestSuite(t)
ctx, cancel := context.WithTimeout(suite.Context, 10*time.Second)
defer cancel()
// Open all files and wait for clangd to index them
openAllFilesAndWait(suite, ctx)
filePath := filepath.Join(suite.WorkspaceDir, "src/main.cpp")
result, err := tools.GetDiagnosticsForFile(ctx, suite.Client, filePath, 2, true)
if err != nil {
t.Fatalf("GetDiagnosticsForFile failed: %v", err)
}
// Verify we have diagnostics about unreachable code
if strings.Contains(result, "No diagnostics found") {
t.Errorf("Expected diagnostics but got none")
}
if !strings.Contains(result, "unreachable") {
t.Errorf("Expected unreachable code error but got: %s", result)
}
common.SnapshotTest(t, "clangd", "diagnostics", "unreachable", result)
})
}
