Migrate cross-package ride test fixtures to the ridetest DSL

Replace raw FromColumns 4-array blocks in official_climb, mountain_pass
and web test rides with ridetest.MustRide strings. Add a Heading option to
ridetest for routes whose points are spaced differently per kilometer
(e.g. the mountain_pass expanded-bounds route at 0.1 degrees/km).

Lap, direction and cluster tests in official_climb keep FromColumns: the
DSL generates monotonic northeast coords and cannot express per-point
loops or reversals.

1 files changed, 11 insertions, 0 deletions

diff --git a/internal/ridetest/ride_test.go b/internal/ridetest/ride_test.go
index 69c084d..65483f2 100644
--- a/internal/ridetest/ride_test.go
+++ b/internal/ridetest/ride_test.go
@@ -53,6 +53,17 @@ func TestRideStartCoordHeading(t *testing.T) {
 	assert.InDelta(t, 5.12, r.Coords()[2].Lon, 1e-9)
 }
 
+func TestRideHeadingOption(t *testing.T) {
+	r, err := Ride("1km at 0%", StartCoord(43.0, 5.0), Heading(0.1, 0.1), Sampling(1000))
+	require.NoError(t, err)
+
+	// A single kilometer at 0.1°/km ends at (43.1, 5.1), matching rides whose
+	// points are spaced 0.1° apart over a kilometer.
+	require.Len(t, r.Coords(), 2)
+	assert.InDelta(t, 43.1, r.Coords()[1].Lat, 1e-9)
+	assert.InDelta(t, 5.1, r.Coords()[1].Lon, 1e-9)
+}
+
 func TestRideStartTime(t *testing.T) {
 	start := time.Date(2026, 8, 1, 10, 0, 0, 0, time.UTC)
 	r, err := Ride("1km at 0%", StartTime(start), Sampling(500))