textfile: set windows_exporter_collector_success to 0, if errors occurs

Signed-off-by: Jan-Otto Kröpke <[email protected]>

internal/collector/textfile/textfile_test_test.go

@@ -26,6 +26,7 @@ import (
 	"github.com/prometheus-community/windows_exporter/pkg/collector"
 	"github.com/prometheus/client_golang/prometheus"
 	dto "github.com/prometheus/client_model/go"
+	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
 )
 
@@ -105,15 +106,8 @@ func TestDuplicateFileName(t *testing.T) {
 	}()
 
 	err := textFileCollector.Collect(metrics)
-	if err != nil {
-		t.Errorf("Unexpected error %s", err)
-	}
+	require.ErrorContains(t, err, "duplicate filename detected")
 
-	if !strings.Contains(got, "file") {
-		t.Errorf("Unexpected output  %q", got)
-	}
-
-	if strings.Contains(got, "sub_file") {
-		t.Errorf("Unexpected output  %q", got)
-	}
+	assert.Contains(t, got, "file")
+	assert.NotContains(t, got, "sub_file")
 }