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package nmea
import (
"fmt"
"strconv"
"strings"
"testing"
"github.com/stretchr/testify/assert"
)
type TestZZZ struct {
BaseSentence
NumberValue int
StringValue string
}
var customparsetests = []struct {
name string
raw string
err string
msg interface{}
}{
{
name: "yyy sentence",
raw: "$AAYYY,20,one,*13",
msg: TestZZZ{
BaseSentence: BaseSentence{
Talker: "AA",
Type: "YYY",
Fields: []string{"20", "one", ""},
Checksum: "13",
Raw: "$AAYYY,20,one,*13",
},
NumberValue: 20,
StringValue: "one",
},
},
{
name: "zzz sentence",
raw: "$AAZZZ,30,two,*19",
msg: TestZZZ{
BaseSentence: BaseSentence{
Talker: "AA",
Type: "ZZZ",
Fields: []string{"30", "two", ""},
Checksum: "19",
Raw: "$AAZZZ,30,two,*19",
},
NumberValue: 30,
StringValue: "two",
},
},
{
name: "zzz sentence type",
raw: "$INVALID,123,123,*7D",
err: "nmea: sentence prefix 'INVALID' not supported",
},
{
name: "still works",
raw: "$GPZDA,172809.456,12,07,1996,00,00*57",
msg: ZDA{
BaseSentence: BaseSentence{
Talker: "GP",
Type: "ZDA",
Fields: []string{"172809.456", "12", "07", "1996", "00", "00"},
Checksum: "57",
Raw: "$GPZDA,172809.456,12,07,1996,00,00*57",
},
Time: Time{Valid: true, Hour: 17, Minute: 28, Second: 9, Millisecond: 456},
Day: 12,
Month: 7,
Year: 1996,
OffsetHours: 0,
OffsetMinutes: 0,
},
},
}
func init() {
// Register some custom parsers
MustRegisterParser("YYY", func(s BaseSentence) (Sentence, error) {
// Somewhat error prone parser without deps
fields := strings.Split(s.Raw, ",")
checksum := Checksum(s.Raw[1 : len(s.Raw)-3])
checksumRaw := s.Raw[len(s.Raw)-2:]
if checksum != checksumRaw {
return nil, fmt.Errorf("nmea: sentence checksum mismatch [%s != %s]", checksum, checksumRaw)
}
nummericValue, _ := strconv.Atoi(fields[1])
return TestZZZ{
BaseSentence: s,
NumberValue: nummericValue,
StringValue: fields[2],
}, nil
})
MustRegisterParser("ZZZ", func(s BaseSentence) (Sentence, error) {
// Somewhat error prone parser
p := NewParser(s)
numberVal := int(p.Int64(0, "number"))
stringVal := p.String(1, "str")
return TestZZZ{
BaseSentence: s,
NumberValue: numberVal,
StringValue: stringVal,
}, p.Err()
})
}
func TestCustomParser(t *testing.T) {
for _, tt := range customparsetests {
t.Run(tt.name, func(t *testing.T) {
m, err := Parse(tt.raw)
if tt.err != "" {
assert.EqualError(t, err, tt.err)
} else {
assert.NoError(t, err)
assert.Equal(t, tt.msg, m)
}
})
}
}
func TestWillReturnErrorOnDuplicateRegistration(t *testing.T) {
err := RegisterParser("XXX", func(s BaseSentence) (Sentence, error) {
return BaseSentence{}, nil
})
assert.NoError(t, err)
err = RegisterParser("XXX", func(s BaseSentence) (Sentence, error) {
return BaseSentence{}, nil
})
assert.Error(t, err)
}
func TestWillPanicOnDuplicateMustRegister(t *testing.T) {
MustRegisterParser("AAA", func(s BaseSentence) (Sentence, error) {
return BaseSentence{}, nil
})
assert.PanicsWithError(t, "nmea: parser for sentence type '\"AAA\"' already exists", func() {
MustRegisterParser("AAA", func(s BaseSentence) (Sentence, error) {
return BaseSentence{}, nil
})
})
}
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