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el-retired/docs/experiments/instruments/instrument/plot/prove.sh
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#!/usr/bin/env bash
# prove.sh — evidence the plot instrument works. Both directions.
set -uo pipefail
D="$(cd "$(dirname "$0")" && pwd)"
python3 - "$D" <<'PY'
import sys, csv, os
D = sys.argv[1]; sys.path.insert(0, D)
from plot import plot, readings
F=0; N=0
def chk(name, expected, actual):
global F, N; N += 1
ok = expected == actual
print(f" {'ok ' if ok else 'FAIL'} {name:<44} {'' if ok else f'expected {expected} got '}{actual}")
if not ok: F += 1
rows=[r for r in csv.reader(open(f"{D}/reference/KNOWN-SERIES.tsv"), delimiter="\t") if r and not r[0].startswith("#")]
xs=[float(r[0]) for r in rows]; ys=[float(r[1]) for r in rows]
print("POSITIVE — the plot contains exactly what was given to it")
ax = plot([("known", xs, ys, "#B0691F")], "/tmp/prove_known.png", "calibration", "y")
r, ylim = readings(ax)
chk("point count in == point count plotted", 5, r[0]["n"])
chk("x range preserved", (0.0, 4.0), (r[0]["xmin"], r[0]["xmax"]))
chk("y range preserved", (5.0, 40.0), (r[0]["ymin"], r[0]["ymax"]))
chk("final point not dropped/sorted", (4.0, 5.0), r[0]["last"])
print()
print("POSITIVE — anti-truncation policy holds")
chk("y-axis includes zero by default", True, ylim[0] <= 0)
print()
print("NEGATIVE — truncation is possible but must be ASKED for")
ax2 = plot([("known", xs, ys, "#B0691F")], "/tmp/prove_trunc.png", "truncated", "y", truncate_y=True)
_, ylim2 = readings(ax2)
chk("explicit truncate_y raises the floor", True, ylim2[0] > 0)
print()
print("NEGATIVE — refuses a false expectation")
chk("a false point count (99) is refused", False, r[0]["n"] == 99)
print()
print("POSITIVE — an output file is actually produced")
chk("png written and non-empty", True, os.path.getsize("/tmp/prove_known.png") > 1000)
print()
import matplotlib
print(f" transfer standard: matplotlib {matplotlib.__version__}")
print(f" {'PROVEN' if F==0 else 'NOT PROVEN'} — {N} checks, {F} failed")
sys.exit(F)
PY