Use %w to wrap errors (#1175)

1 files changed, 4 insertions, 4 deletions

diff --git a/brotli_test.go b/brotli_test.go
index 1ac94dd..a4efa05 100644
--- a/brotli_test.go
+++ b/brotli_test.go
@@ -42,7 +42,7 @@ func testBrotliBytesSingleCase(s string) error {
 
 	unbrotliedS, err := AppendUnbrotliBytes(prefix, brotlipedS[len(prefix):])
 	if err != nil {
-		return fmt.Errorf("unexpected error when uncompressing %q: %s", s, err)
+		return fmt.Errorf("unexpected error when uncompressing %q: %w", s, err)
 	}
 	if !bytes.Equal(unbrotliedS[:len(prefix)], prefix) {
 		return fmt.Errorf("unexpected prefix when uncompressing %q: %q. Expecting %q", s, unbrotliedS[:len(prefix)], prefix)
@@ -83,17 +83,17 @@ func testBrotliCompressSingleCase(s string) error {
 	var buf bytes.Buffer
 	zw := acquireStacklessBrotliWriter(&buf, CompressDefaultCompression)
 	if _, err := zw.Write([]byte(s)); err != nil {
-		return fmt.Errorf("unexpected error: %s. s=%q", err, s)
+		return fmt.Errorf("unexpected error: %w. s=%q", err, s)
 	}
 	releaseStacklessBrotliWriter(zw, CompressDefaultCompression)
 
 	zr, err := acquireBrotliReader(&buf)
 	if err != nil {
-		return fmt.Errorf("unexpected error: %s. s=%q", err, s)
+		return fmt.Errorf("unexpected error: %w. s=%q", err, s)
 	}
 	body, err := ioutil.ReadAll(zr)
 	if err != nil {
-		return fmt.Errorf("unexpected error: %s. s=%q", err, s)
+		return fmt.Errorf("unexpected error: %w. s=%q", err, s)
 	}
 	if string(body) != s {
 		return fmt.Errorf("unexpected string after decompression: %q. Expecting %q", body, s)