gobot.io/x/gobot@v1.16.0/drivers/i2c/mpl115a2_driver_test.go (about)

     1  package i2c
     2  
     3  import (
     4  	"errors"
     5  	"strings"
     6  	"testing"
     7  
     8  	"gobot.io/x/gobot"
     9  	"gobot.io/x/gobot/gobottest"
    10  )
    11  
    12  var _ gobot.Driver = (*MPL115A2Driver)(nil)
    13  
    14  // --------- HELPERS
    15  func initTestMPL115A2Driver() (driver *MPL115A2Driver) {
    16  	driver, _ = initTestMPL115A2DriverWithStubbedAdaptor()
    17  	return
    18  }
    19  
    20  func initTestMPL115A2DriverWithStubbedAdaptor() (*MPL115A2Driver, *i2cTestAdaptor) {
    21  	adaptor := newI2cTestAdaptor()
    22  	return NewMPL115A2Driver(adaptor), adaptor
    23  }
    24  
    25  // --------- TESTS
    26  
    27  func TestNewMPL115A2Driver(t *testing.T) {
    28  	// Does it return a pointer to an instance of MPL115A2Driver?
    29  	var mpl interface{} = NewMPL115A2Driver(newI2cTestAdaptor())
    30  	_, ok := mpl.(*MPL115A2Driver)
    31  	if !ok {
    32  		t.Errorf("NewMPL115A2Driver() should have returned a *MPL115A2Driver")
    33  	}
    34  }
    35  
    36  // Methods
    37  func TestMPL115A2Driver(t *testing.T) {
    38  	mpl := initTestMPL115A2Driver()
    39  
    40  	gobottest.Refute(t, mpl.Connection(), nil)
    41  	gobottest.Assert(t, strings.HasPrefix(mpl.Name(), "MPL115A2"), true)
    42  }
    43  
    44  func TestMPL115A2DriverOptions(t *testing.T) {
    45  	mpl := NewMPL115A2Driver(newI2cTestAdaptor(), WithBus(2))
    46  	gobottest.Assert(t, mpl.GetBusOrDefault(1), 2)
    47  }
    48  
    49  func TestMPL115A2DriverSetName(t *testing.T) {
    50  	mpl := initTestMPL115A2Driver()
    51  	mpl.SetName("TESTME")
    52  	gobottest.Assert(t, mpl.Name(), "TESTME")
    53  }
    54  
    55  func TestMPL115A2DriverStart(t *testing.T) {
    56  	mpl, _ := initTestMPL115A2DriverWithStubbedAdaptor()
    57  
    58  	gobottest.Assert(t, mpl.Start(), nil)
    59  }
    60  
    61  func TestMPL115A2StartConnectError(t *testing.T) {
    62  	d, adaptor := initTestMPL115A2DriverWithStubbedAdaptor()
    63  	adaptor.Testi2cConnectErr(true)
    64  	gobottest.Assert(t, d.Start(), errors.New("Invalid i2c connection"))
    65  }
    66  
    67  func TestMPL115A2DriverStartWriteError(t *testing.T) {
    68  	mpl, adaptor := initTestMPL115A2DriverWithStubbedAdaptor()
    69  	adaptor.i2cWriteImpl = func([]byte) (int, error) {
    70  		return 0, errors.New("write error")
    71  	}
    72  	gobottest.Assert(t, mpl.Start(), errors.New("write error"))
    73  }
    74  
    75  func TestMPL115A2DriverReadData(t *testing.T) {
    76  	mpl, adaptor := initTestMPL115A2DriverWithStubbedAdaptor()
    77  
    78  	adaptor.i2cReadImpl = func(b []byte) (int, error) {
    79  		copy(b, []byte{0x00, 0x01, 0x02, 0x04})
    80  		return 4, nil
    81  	}
    82  	mpl.Start()
    83  
    84  	press, _ := mpl.Pressure()
    85  	temp, _ := mpl.Temperature()
    86  	gobottest.Assert(t, press, float32(50.007942))
    87  	gobottest.Assert(t, temp, float32(116.58878))
    88  }
    89  
    90  func TestMPL115A2DriverReadDataError(t *testing.T) {
    91  	mpl, adaptor := initTestMPL115A2DriverWithStubbedAdaptor()
    92  	mpl.Start()
    93  
    94  	adaptor.i2cWriteImpl = func([]byte) (int, error) {
    95  		return 0, errors.New("write error")
    96  	}
    97  	_, err := mpl.Pressure()
    98  
    99  	gobottest.Assert(t, err, errors.New("write error"))
   100  }
   101  
   102  func TestMPL115A2DriverHalt(t *testing.T) {
   103  	mpl := initTestMPL115A2Driver()
   104  
   105  	gobottest.Assert(t, mpl.Halt(), nil)
   106  }