pkg/*: clean up a few issues

Signed-off-by: Cristian Staretu <cristian.staretu@gmail.com>

pkg/ioutils/fswriters_test.go

@@ -37,7 +37,7 @@ func TestAtomicWriteToFile(t *testing.T) {
 		t.Fatalf("Error reading from file: %v", err)
 	}
 
-	if bytes.Compare(actual, expected) != 0 {
+	if !bytes.Equal(actual, expected) {
 		t.Fatalf("Data mismatch, expected %q, got %q", expected, actual)
 	}
 
@@ -85,7 +85,7 @@ func TestAtomicWriteSetCommit(t *testing.T) {
 		t.Fatalf("Error reading from file: %v", err)
 	}
 
-	if bytes.Compare(actual, expected) != 0 {
+	if !bytes.Equal(actual, expected) {
 		t.Fatalf("Data mismatch, expected %q, got %q", expected, actual)
 	}
 

pkg/ioutils/multireader_test.go

@@ -193,7 +193,7 @@ func TestMultiReadSeekerCurAfterSet(t *testing.T) {
 func TestMultiReadSeekerSmallReads(t *testing.T) {
 	readers := []io.ReadSeeker{}
 	for i := 0; i < 10; i++ {
-		integer := make([]byte, 4, 4)
+		integer := make([]byte, 4)
 		binary.BigEndian.PutUint32(integer, uint32(i))
 		readers = append(readers, bytes.NewReader(integer))
 	}

pkg/jsonlog/jsonlogbytes.go

@@ -30,7 +30,7 @@ func (mj *JSONLogs) MarshalJSONBuf(buf *bytes.Buffer) error {
 		ffjsonWriteJSONBytesAsString(buf, mj.Log)
 	}
 	if len(mj.Stream) != 0 {
-		if first == true {
+		if first {
 			first = false
 		} else {
 			buf.WriteString(`,`)

pkg/listeners/group_unix.go

@@ -23,7 +23,7 @@ func lookupGID(name string) (int, error) {
 	if err != nil {
 		return -1, errors.Wrapf(err, "error parsing groups for %s", name)
 	}
-	if groups != nil && len(groups) > 0 {
+	if len(groups) > 0 {
 		return groups[0].Gid, nil
 	}
 	gid, err := strconv.Atoi(name)

pkg/mount/mount.go

@@ -46,10 +46,7 @@ func Mount(device, target, mType, options string) error {
 // flags.go for supported option flags.
 func ForceMount(device, target, mType, options string) error {
 	flag, data := parseOptions(options)
-	if err := mount(device, target, mType, uintptr(flag), data); err != nil {
-		return err
-	}
-	return nil
+	return mount(device, target, mType, uintptr(flag), data)
 }
 
 // Unmount will unmount the target filesystem, so long as it is mounted.

pkg/plugins/discovery_test.go

@@ -66,7 +66,7 @@ func TestFileSpecPlugin(t *testing.T) {
 			t.Fatalf("Expected plugin addr `%s`, got %s\n", c.addr, p.Addr)
 		}
 
-		if p.TLSConfig.InsecureSkipVerify != true {
+		if !p.TLSConfig.InsecureSkipVerify {
 			t.Fatalf("Expected TLS verification to be skipped")
 		}
 	}

pkg/plugins/discovery_unix_test.go

@@ -53,7 +53,7 @@ func TestLocalSocket(t *testing.T) {
 		if p.Addr != addr {
 			t.Fatalf("Expected plugin addr `%s`, got %s\n", addr, p.Addr)
 		}
-		if p.TLSConfig.InsecureSkipVerify != true {
+		if !p.TLSConfig.InsecureSkipVerify {
 			t.Fatalf("Expected TLS verification to be skipped")
 		}
 		l.Close()

pkg/progress/progressreader_test.go

@@ -14,7 +14,7 @@ func TestOutputOnPrematureClose(t *testing.T) {
 
 	pr := NewProgressReader(reader, ChanOutput(progressChan), int64(len(content)), "Test", "Read")
 
-	part := make([]byte, 4, 4)
+	part := make([]byte, 4)
 	_, err := io.ReadFull(pr, part)
 	if err != nil {
 		pr.Close()

pkg/registrar/registrar.go

@@ -100,9 +100,7 @@ func (r *Registrar) GetNames(key string) ([]string, error) {
 	}
 
 	ls := make([]string, 0, len(names))
-	for _, n := range names {
-		ls = append(ls, n)
-	}
+	ls = append(ls, names...)
 	return ls, nil
 }