Isolate CLI tests from host configuration

internal/cli/run_test.go

@@ -1173,6 +1173,15 @@ func waitForAtomicAtLeast(t *testing.T, value *int32, want int32) {
 }
 
 func TestRunProcessReportJSONSuccessIncludesNormalizationSummary(t *testing.T) {
+	// Exercise the no-config metadata contract without consulting system files.
+	t.Setenv("AUDITA_CONFIG", "")
+	if err := os.Unsetenv("AUDITA_CONFIG"); err != nil {
+		t.Fatal(err)
+	}
+	searchPaths := config.DefaultConfigSearchPaths
+	config.DefaultConfigSearchPaths = nil
+	t.Cleanup(func() { config.DefaultConfigSearchPaths = searchPaths })
+
 	var stdout bytes.Buffer
 	var stderr bytes.Buffer
 
@@ -1350,7 +1359,7 @@ func TestRunProcessReportJSONAndRunDirReportShareDiagnosticsMetadata(t *testing.
 	if externalReport.Diagnostics == nil || runDirReport.Diagnostics == nil {
 		t.Fatalf("expected diagnostics metadata in both reports")
 	}
-	if externalReport.ReportMetadata != runDirReport.ReportMetadata {
+	if !reflect.DeepEqual(externalReport.ReportMetadata, runDirReport.ReportMetadata) {
 		t.Fatalf("expected same report metadata in --report-json and run-dir report\nexternal=%+v\nrun-dir=%+v",
 			externalReport.ReportMetadata, runDirReport.ReportMetadata)
 	}