Fix test failures

hdc302x/hdc302x.go

@@ -159,7 +159,7 @@ var writeHighAlertThresholds = devCommand{0x61, 0x1d}
 var writeLowClearThresholds = devCommand{0x61, 0x0b}
 var writeHighClearThresholds = devCommand{0x61, 0x16}
 
-var invalidCRCError = errors.New("hdc302x: invalid crc")
+var errInvalidCRC = errors.New("hdc302x: invalid crc")
 
 const (
 	// Magic numbers for count to value conversions.
@@ -252,7 +252,7 @@ func (dev *Dev) Sense(env *physic.Env) error {
 		return fmt.Errorf("hdc302x: %w", err)
 	}
 	if crc8(res[:2]) != res[2] || crc8(res[3:5]) != res[5] {
-		return invalidCRCError
+		return errInvalidCRC
 	}
 	env.Temperature = countToTemperature(res)
 	env.Humidity = countToHumidity(res[3:])
@@ -359,7 +359,7 @@ func (dev *Dev) readAlertValues(cfg *Configuration) error {
 			return err
 		}
 		if crc8(r[:2]) != r[2] {
-			return invalidCRCError
+			return errInvalidCRC
 		}
 		wValue := uint16(r[0])<<8 | uint16(r[1])
 		// The alert value is returned as a 16 bit words, where bits 0-8 are the
@@ -382,7 +382,7 @@ func (dev *Dev) readOffsets(cfg *Configuration) error {
 		return fmt.Errorf("hdc302x: %w", err)
 	}
 	if crc8(r[:2]) != r[2] {
-		return invalidCRCError
+		return errInvalidCRC
 	}
 
 	// The result comes back as the humidity offset, followed by
@@ -425,7 +425,7 @@ func (dev *Dev) ReadStatus() (StatusWord, error) {
 		return 0, err
 	}
 	if crc8(r[:2]) != r[2] {
-		return 0, invalidCRCError
+		return 0, errInvalidCRC
 	}
 	_ = dev.d.Tx(clearStatus, nil)
 	return StatusWord(r[0])<<8 | StatusWord(r[1]), nil

hdc302x/hdc302x_test.go

@@ -8,6 +8,7 @@ import (
 	"fmt"
 	"math"
 	"os"
+	"sync"
 	"sync/atomic"
 	"testing"
 	"time"
@@ -391,6 +392,8 @@ func TestSenseContinuous(t *testing.T) {
 
 	counter := atomic.Int32{}
 	tEnd := time.Now().UnixMilli() + int64(readCount+2)*1000
+	wg := sync.WaitGroup{}
+	wg.Add(1)
 	go func() {
 		for {
 			time.Sleep(100 * time.Millisecond)
@@ -401,6 +404,7 @@ func TestSenseContinuous(t *testing.T) {
 				if err != nil {
 					t.Error(err)
 				}
+				wg.Done()
 				return
 			}
 		}
@@ -413,6 +417,7 @@ func TestSenseContinuous(t *testing.T) {
 	if counter.Load() != readCount {
 		t.Errorf("expected %d readings. received %d", readCount, counter.Load())
 	}
+	wg.Wait()
 }
 
 func TestConfiguration(t *testing.T) {
@@ -590,8 +595,8 @@ func TestHeater(t *testing.T) {
 	t.Logf("initial temperature: %s Humidity: %s", env.Temperature, env.Humidity)
 	err = dev.SetHeater(PowerFull)
 	defer func() {
-		if err := dev.SetHeater(PowerOff); err != nil {
-			t.Error(err)
+		if errOff := dev.SetHeater(PowerOff); errOff != nil {
+			t.Error(errOff)
 		}
 	}()
 	if err != nil {