<?php
 
// [[$a, $b, $c], $expected]
$tests = [
  [[1, 2, 3], false], // a < b < c, erro!
  [[1, 3, 2], false], // a < b > c, erro!
  [[2, 1, 3], false], // a > b < c, erro!
  [[3, 2, 1], true],  // a > b > c, ok!
  [[1, 1, 1], false], // a = b = c, erro!
  [[2, 2, 1], false], // a = b > c, erro!
  [[2, 1, 1], false], // a > b = c, erro!
  [[2, 1, 2], false]  // a > b < c, erro!
];
 
foreach($tests as $i => $test)
{
  list($curva_a, $curva_b, $curva_c) = $test[0];
  $expected = $test[1];
 
  assert(($curva_a <= $curva_b || $curva_b <= $curva_c) == !$expected, "Erro no teste {$i}");
}

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