Adds tests for grove temperature sensor driver

Signed-off-by: Warren Fernandes <[email protected]>

drivers/gpio/grove_temperature_sensor_driver.go

@@ -10,6 +10,7 @@ import (
 var _ gobot.Driver = (*GroveTemperatureSensorDriver)(nil)
 
 // GroveTemperatureSensorDriver represents a Temperature Sensor
+// The temperature is reported in degree Celsius
 type GroveTemperatureSensorDriver struct {
 	name        string
 	pin         string

drivers/gpio/grove_temperature_sensor_driver_test.go

@@ -1,7 +1,77 @@
 package gpio
 
 import (
+	"errors"
+	"fmt"
+	"testing"
+	"time"
+
 	"github.com/hybridgroup/gobot"
+	"github.com/wfernandes/gobot/gobottest"
 )
 
 var _ gobot.Driver = (*GroveTemperatureSensorDriver)(nil)
+
+func TestGroveTemperatureSensorDriver(t *testing.T) {
+	testAdaptor := newGpioTestAdaptor()
+	d := NewGroveTemperatureSensorDriver(testAdaptor, "123")
+	gobottest.Assert(t, d.Connection(), testAdaptor)
+	gobottest.Assert(t, d.Pin(), "123")
+	gobottest.Assert(t, d.interval, 10*time.Millisecond)
+}
+
+func TestGroveTempSensorPublishesTemperatureInCelsius(t *testing.T) {
+	sem := make(chan bool, 1)
+	d := NewGroveTemperatureSensorDriver(newGpioTestAdaptor(), "1")
+
+	testAdaptorAnalogRead = func() (val int, err error) {
+		val = 585
+		return
+	}
+	gobottest.Assert(t, len(d.Start()), 0)
+
+	d.Once(d.Event(Data), func(data interface{}) {
+		gobottest.Assert(t, fmt.Sprintf("%.2f", data.(float64)), "31.62")
+		sem <- true
+	})
+}
+
+func TestGroveTempSensorPublishesError(t *testing.T) {
+	sem := make(chan bool, 1)
+	d := NewGroveTemperatureSensorDriver(newGpioTestAdaptor(), "1")
+
+	// send error
+	testAdaptorAnalogRead = func() (val int, err error) {
+		err = errors.New("read error")
+		return
+	}
+
+	gobottest.Assert(t, len(d.Start()), 0)
+
+	// expect error
+	d.Once(d.Event(Error), func(data interface{}) {
+		gobottest.Assert(t, data.(error).Error(), "read error")
+		sem <- true
+	})
+
+	select {
+	case <-sem:
+	case <-time.After(time.Second):
+		t.Errorf("Grove Temperature Sensor Event \"Error\" was not published")
+	}
+}
+
+func TestGroveTempSensorHalt(t *testing.T) {
+	d := NewGroveTemperatureSensorDriver(newGpioTestAdaptor(), "1")
+	done := make(chan struct{})
+	go func() {
+		<-d.halt
+		close(done)
+	}()
+	gobottest.Assert(t, len(d.Halt()), 0)
+	select {
+	case <-done:
+	case <-time.After(time.Millisecond):
+		t.Errorf("Grove Temperature Sensor was not halted")
+	}
+}