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package ride_test
import (
"testing"
"github.com/martinlehoux/biking_home/ride"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
)
func TestDetectElevationOutliers_TunnelSpike(t *testing.T) {
// Simulate ride 754 tunnel: steady then spike 46m over 7m (grade 657%), then normal.
distances := []float64{0, 10, 20, 27, 34} // 7m gap at idx 3
elevations := []float64{100, 101, 102, 148, 149}
outliers := ride.DetectElevationOutliers(distances, elevations, 0.5)
require.Len(t, outliers, 1)
assert.Equal(t, 2, outliers[0].StartIdx) // expanded by 1
assert.Equal(t, 4, outliers[0].EndIdx)
assert.Greater(t, outliers[0].MaxGrade, 5.0)
}
func TestDetectElevationOutliers_IgnoresSmallJitter(t *testing.T) {
distances := []float64{0, 0.5, 1.0, 1.5}
elevations := []float64{100, 100.3, 100.6, 100.9} // 0.3m over 0.5m =60% but abs de <1.5
outliers := ride.DetectElevationOutliers(distances, elevations, 0.5)
assert.Empty(t, outliers)
}
func TestDetectElevationOutliers_IgnoresGentleSlope(t *testing.T) {
distances := []float64{0, 10, 20, 30}
elevations := []float64{100, 102, 104, 106} // 20% grade
outliers := ride.DetectElevationOutliers(distances, elevations, 0.5)
assert.Empty(t, outliers)
}
func TestLinearFix_Interpolates(t *testing.T) {
distances := []float64{0, 10, 20, 30, 40}
elevations := []float64{100, 110, 999, 130, 140}
zones := []ride.FixZone{{StartIdx: 1, EndIdx: 3, StartKm: 0.01, EndKm: 0.03}}
n := ride.LinearFix(distances, elevations, zones)
assert.Equal(t, 1, n)
assert.InDelta(t, 120, elevations[2], 0.01)
}
func TestResolveIndex_ByKm(t *testing.T) {
distances := []float64{0, 1000, 2000, 3000}
idx, err := ride.ResolveIndex(distances, "1.5km")
require.NoError(t, err)
// nearest to 1500 is idx 1 or 2 (both 500 away, picks first)
assert.Contains(t, []int{1, 2}, idx)
}
func TestResolveIndex_ByIndex(t *testing.T) {
distances := []float64{0, 1000, 2000}
idx, err := ride.ResolveIndex(distances, "2")
require.NoError(t, err)
assert.Equal(t, 2, idx)
}
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