number-error-trailing-decimal.html

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This WPT test may be referenced by the following Test IDs:
- /svg/path/parsing/number-error-trailing-decimal.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<html>

<head>

<meta charset="utf-8">

<title>SVG Path Data: Error - trailing decimal point</title>

<link rel="help" href="https://svgwg.org/svg2-draft/paths.html#PathDataBNF">

<script src="/resources/testharness.js"></script>

<script src="/resources/testharnessreport.js"></script>

</head>

<body>

<svg id="svg" width="400" height="400" xmlns="http://www.w3.org/2000/svg">

  <!-- Test: "23." is an error - path should render up to this point -->

  <path id="test1" d="M 10,10 L 50,50 L 23.,100" fill="none" stroke="black" stroke-width="2"/>

  <!-- Reference: path should only render M 10,10 L 50,50 -->

  <path id="ref1" d="M 10,10 L 50,50" fill="none" stroke="red" stroke-width="1" stroke-dasharray="2,2"/>

</svg>

<script>

test(function() {

  const testPath = document.getElementById('test1');

  const refPath = document.getElementById('ref1');

  // Path with error should render same as path without the error command

  const testLength = testPath.getTotalLength();

  const refLength = refPath.getTotalLength();

  assert_approx_equals(testLength, refLength, 0.1,

    "Path with trailing decimal should render only up to the error");

}, "Error handling: Path renders up to (not including) trailing decimal error");

test(function() {

  const testPath = document.getElementById('test1');

  const endPoint = testPath.getPointAtLength(testPath.getTotalLength());

  // Should stop at L 50,50, not continue to the invalid L 23.,100

  assert_approx_equals(endPoint.x, 50, 0.1, "Path should end at x=50");

  assert_approx_equals(endPoint.y, 50, 0.1, "Path should end at y=50");

}, "Error handling: Path ends at last valid segment before error");

test(function() {

  // Multiple trailing decimals

  const svg = document.getElementById('svg');

  const path = document.createElementNS('http://www.w3.org/2000/svg', 'path');

  path.setAttribute('d', 'M 0,0 L 10,10 L 20.,30.');

  svg.appendChild(path);

  const endPoint = path.getPointAtLength(path.getTotalLength());

  // Should render up to L 10,10

  assert_approx_equals(endPoint.x, 10, 0.1, "Should stop before first trailing decimal");

  assert_approx_equals(endPoint.y, 10, 0.1, "Should stop before first trailing decimal");

}, "Error handling: First trailing decimal stops rendering");

test(function() {

  // Trailing decimal in middle of coordinate pair

  const svg = document.getElementById('svg');

  const path = document.createElementNS('http://www.w3.org/2000/svg', 'path');

  path.setAttribute('d', 'M 0,0 L 15. 20');

  svg.appendChild(path);

  const totalLength = path.getTotalLength();

  const refPath = document.createElementNS('http://www.w3.org/2000/svg', 'path');

  refPath.setAttribute('d', 'M 0,0');

  svg.appendChild(path);

  // Should only render M 0,0, not the L command

  assert_approx_equals(totalLength, 0, 0.1,

    "Path with trailing decimal in first coordinate should not render the L command");

}, "Error handling: Trailing decimal in first coordinate of pair");

test(function() {

  // Valid path followed by error - should render valid part

  const svg = document.getElementById('svg');

  const path = document.createElementNS('http://www.w3.org/2000/svg', 'path');

  path.setAttribute('d', 'M 100,100 L 150,100 L 150,150 L 100,150 Z M 200.,200.');

  svg.appendChild(path);

  // Should render the complete square (first subpath) before the error

  const length = path.getTotalLength();

  const refPath = document.createElementNS('http://www.w3.org/2000/svg', 'path');

  refPath.setAttribute('d', 'M 100,100 L 150,100 L 150,150 L 100,150 Z');

  svg.appendChild(refPath);

  const refLength = refPath.getTotalLength();

  assert_approx_equals(length, refLength, 0.1,

    "Valid closed path before error should render completely");

}, "Error handling: Complete valid subpath renders before trailing decimal error");

</script>

</body>

</html>