Parse FIT Course files as rides

1 files changed, 74 insertions, 0 deletions

diff --git a/ride/fit_test.go b/ride/fit_test.go
new file mode 100644
index 0000000..9e9e0a3
--- /dev/null
+++ b/ride/fit_test.go
@@ -0,0 +1,74 @@
+package ride_test
+
+import (
+	"bytes"
+	"encoding/binary"
+	"testing"
+	"time"
+
+	"github.com/martinlehoux/biking_home/ride"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+	"github.com/tormoder/fit"
+)
+
+func encodeFIT(t *testing.T, fileType fit.FileType, records []*fit.RecordMsg) []byte {
+	t.Helper()
+	file, err := fit.NewFile(fileType, fit.NewHeader(fit.V20, true))
+	require.NoError(t, err)
+	file.FileId.Manufacturer = fit.ManufacturerGarmin
+	file.FileId.Type = fileType
+	file.FileId.TimeCreated = time.Date(2026, 8, 1, 7, 30, 0, 0, time.UTC)
+	switch fileType {
+	case fit.FileTypeCourse:
+		course, err := file.Course()
+		require.NoError(t, err)
+		course.Records = records
+	case fit.FileTypeActivity:
+		activity, err := file.Activity()
+		require.NoError(t, err)
+		activity.Records = records
+	}
+	var buf bytes.Buffer
+	require.NoError(t, fit.Encode(&buf, file, binary.LittleEndian))
+	return buf.Bytes()
+}
+
+func fitRecord(lat, lon, elevationM float64, ts time.Time) *fit.RecordMsg {
+	rec := fit.NewRecordMsg()
+	rec.Timestamp = ts
+	rec.PositionLat = fit.NewLatitudeDegrees(lat)
+	rec.PositionLong = fit.NewLongitudeDegrees(lon)
+	rec.Altitude = uint16((elevationM + 500) * 5)
+	rec.HeartRate = 0xFF
+	rec.Cadence = 0xFF
+	rec.Power = 0xFFFF
+	return rec
+}
+
+func TestFITRideParserParsesCourseFile(t *testing.T) {
+	base := time.Date(2026, 8, 1, 7, 30, 0, 0, time.UTC)
+	data := encodeFIT(t, fit.FileTypeCourse, []*fit.RecordMsg{
+		fitRecord(43.0, 5.0, 100, base),
+		fitRecord(43.0, 5.0, 101, base.Add(5*time.Second)), // stationary: skipped
+		fitRecord(43.001, 5.001, 200, base.Add(10*time.Second)),
+	})
+
+	parsed, err := (ride.FITRideParser{}).Parse(bytes.NewReader(data))
+	require.NoError(t, err)
+	require.Equal(t, 2, parsed.Len())
+	assert.Equal(t, 0.0, parsed.Distances[0])
+	assert.Greater(t, parsed.Distances[1], 0.0)
+	assert.Equal(t, []float64{100, 200}, parsed.Elevations)
+	assert.Equal(t, []time.Time{base, base.Add(10 * time.Second)}, parsed.Timestamps())
+	_, hasHR := parsed.HeartRates()
+	assert.False(t, hasHR, "course records carry no telemetry")
+}
+
+func TestFITRideParserRejectsFileWithoutTrack(t *testing.T) {
+	data := encodeFIT(t, fit.FileTypeSettings, nil)
+
+	_, err := (ride.FITRideParser{}).Parse(bytes.NewReader(data))
+	require.Error(t, err)
+	assert.Equal(t, "fit file type is Settings, not Activity or Course", err.Error())
+}