ludic.wildlife: pin every transition of the 15 WILD_* states and the dice each draws (phase 27.2a)

Sixteen test programs under tests/*_pins_test.ludic, on today's code, each one tick from a set
state through the public step (wildlife_tick_ground / _bird / wildlife_tick, wildlife_release,
wildlife_new): the state it goes to, its timer, and how many of the package's rolls it took and
which (the next roll is read off a newborn's yaw, compared with a stream of the same seed). IDLE,
WANDER, ALERT, WARY, FLEE, CHARGE, GO_DRINK, GO_FEED, DRINK, APPROACH, EAT, TRAPPED, FLY, LAND,
PERCH; the droppings' roll before them; the newborn's seven (eight for a bird); what the step
leaves alone. tests/pin/ holds the shared step, the dice reader and two species of its own (a tame
horse, a crow that never lands on its own). Compiled, not run here: 27.2 holds to them unchanged.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

packages/ludic.wildlife/tests/approach_pins_test.ludic

@@ -0,0 +1,83 @@
+# approach_pins_test.ludic - phase 27.2a: APPROACH as it stands. Its lure gone, IDLE 2 s; within
+# 1.3 m it EATs - 14 s at food, 9 at a lure - or a snare holds it (TRAPPED where the snare is, a
+# CAUGHT fact); no roll on any of it
+import "ludic.wildlife"
+import "ludic.base"
+import "fake"
+import "pin"
+program ApproachPins {
+  numbers float
+  bind WildlifeWorld {
+    ground: fn fk_ground
+    water: fn fk_water
+    players: fn fk_players
+    player_on: fn fk_player_on
+    player_x: fn fk_x
+    player_y: fn fk_y
+    player_z: fn fk_z
+    about: fn fk_about_of
+    lures: fn fk_count
+    lure: fn fk_lure
+    present: fn fk_present
+    spot: fn pn_spot
+    taught: fn pn_taught
+  }
+
+  function coming(wildlife_st: mut WildlifeState, kind: int, lure_x: float) -> WildAnimal {
+    let a = pn_at(wildlife_st, 2, 0.0, 0.0, WILD_APPROACH, 5.0)
+    a.lure = 50
+    a.lure_kind = kind
+    a.lure_x = lure_x
+    a.lure_z = 0.0
+    a.lure_owner = 3
+    wildlife_seed(wildlife_st, 13)
+    pn_step(wildlife_st, a)
+    return a
+  }
+
+  test "APPROACH, its lure gone: IDLE 2 s, the lure let go" (wildlife_st: mut WildlifeState, wildlife_tests_fake_st: mut WildlifeTestsFakeState) {
+    pn_setup(wildlife_st, wildlife_tests_fake_st)
+    wildlife_tests_fake_st.fk_gone = 50
+    let a = coming(wildlife_st, WILD_FEED, 20.0)
+    expect_eq(a.state, WILD_IDLE)
+    expect_near(a.timer, 2.0, 0.0001)
+    expect_eq(a.lure, 0)
+    expect_eq(pn_drew(wildlife_st, 13), 0)
+  }
+
+  test "APPROACH on its way: walks at its walk, the timer untouched by arriving" (wildlife_st: mut WildlifeState, wildlife_tests_fake_st: mut WildlifeTestsFakeState) {
+    pn_setup(wildlife_st, wildlife_tests_fake_st)
+    let a = coming(wildlife_st, WILD_FEED, 20.0)
+    expect_eq(a.state, WILD_APPROACH)
+    expect_near(a.speed, 1.0, 0.0001)
+    expect_near(a.timer, 4.95, 0.0001)
+    expect_eq(pn_drew(wildlife_st, 13), 0)
+  }
+
+  test "APPROACH within 1.3 m: EAT 14 s at food, 9 s at a lure" (wildlife_st: mut WildlifeState, wildlife_tests_fake_st: mut WildlifeTestsFakeState) {
+    pn_setup(wildlife_st, wildlife_tests_fake_st)
+    let a = coming(wildlife_st, WILD_FEED, 1.0)
+    expect_eq(a.state, WILD_EAT)
+    expect_near(a.timer, 14.0, 0.0001)
+    expect_near(a.speed, 0.0, 0.00001)
+    let b = coming(wildlife_st, WILD_LURE, 1.0)
+    expect_eq(b.state, WILD_EAT)
+    expect_near(b.timer, 9.0, 0.0001)
+    expect_eq(pn_count(pn_drain(wildlife_st), WILD_FED), 0)
+    expect_eq(pn_drew(wildlife_st, 13), 0)
+  }
+
+  test "APPROACH within 1.3 m of a snare: TRAPPED on the snare, CAUGHT with the snare and its owner" (wildlife_st: mut WildlifeState, wildlife_tests_fake_st: mut WildlifeTestsFakeState) {
+    pn_setup(wildlife_st, wildlife_tests_fake_st)
+    let a = coming(wildlife_st, WILD_SNARE, 1.0)
+    expect_eq(a.state, WILD_TRAPPED)
+    expect_near(a.x, 1.0, 0.0001)
+    expect_near(a.z, 0.0, 0.0001)
+    expect_near(a.y, 10.0, 0.0001)
+    let fs = pn_drain(wildlife_st)
+    expect_eq(pn_count(fs, WILD_CAUGHT), 1)
+    expect_eq(fs[0].lure, 50)
+    expect_eq(fs[0].owner, 3)
+    expect_eq(pn_drew(wildlife_st, 13), 0)
+  }
+}