| <!DOCTYPE html> |
| <script src="../../resources/testharness.js"></script> |
| <script src="../../resources/testharnessreport.js"></script> |
| <style> |
| #tests_container { |
| font-size: 20px; |
| line-height: 1; |
| font-family: monospace; |
| width: 2ch; |
| } |
| inline-block { |
| display: inline-block; |
| width: 1ch; |
| height: .6em; |
| background: pink; |
| } |
| </style> |
| <body> |
| <pre id="console"></pre> |
| <div id="tests_container"></div> |
| <script> |
| let tests_container = document.getElementById('tests_container'); |
| let log_container = document.getElementById('console'); |
| |
| class LineBreakTest { |
| constructor(name, innerHTML) { |
| this.name = name; |
| let element = document.createElement('div'); |
| element.innerHTML = innerHTML; |
| tests_container.appendChild(element); |
| this.element = element; |
| } |
| |
| setWidth(width) { |
| this.element.style.width = `${width - 1}px`; |
| } |
| |
| line_count() { |
| let height = this.element.offsetHeight; |
| console.assert(height === 20 || height === 40); |
| return Math.round(height / 20); |
| } |
| } |
| |
| function run() { |
| // Collects code points to test. |
| let code_points = []; |
| for (let code_point = 0x21; code_point <= 0x7E; code_point++) |
| code_points.push(code_point); |
| code_points.push(0xA0); // NBSP |
| code_points.push(0x56FD); // CJK UNIFIED IDEOGRAPH-56FD 国 |
| |
| let tests = []; |
| for (let code_point of code_points) { |
| let name = code_point.toString(16).toUpperCase(); |
| let str = String.fromCodePoint(code_point); |
| tests.push(new LineBreakTest(`Before U+${name}`, '<inline-block></inline-block>' + str)); |
| tests.push(new LineBreakTest(`After U+${name}`, str + '<inline-block></inline-block>')); |
| } |
| |
| // Shrink by 1px so that the line does not fit. |
| for (let t of tests) { |
| console.assert(t.line_count() === 1); |
| t.width = t.element.offsetWidth; |
| } |
| for (let t of tests) |
| t.setWidth(t.width - 1); |
| |
| // Collect results. |
| let logs = []; |
| let no_break_count = 0; |
| for (let t of tests) { |
| if (t.line_count() === 1) { |
| ++no_break_count; |
| logs.push(`No break ${t.name}`); |
| } |
| } |
| logs.push(`${no_break_count} unbreakable combinations found`); |
| log_container.textContent = logs.join('\n'); |
| |
| assert_equals(no_break_count, 0); |
| } |
| |
| test(run); |
| </script> |
| </body> |
