| <!DOCTYPE html> |
| <script src='../resources/testharness.js'></script> |
| <script src='../resources/testharnessreport.js'></script> |
| |
| <script> |
| var EPSILON = 1e-6; // float epsilon |
| |
| let angleUnits = [ |
| 'deg', |
| 'rad', |
| 'grad', |
| 'turn' |
| ]; |
| |
| let fixedLengthUnits = [ |
| 'px', |
| 'in', |
| 'cm', |
| 'mm', |
| 'pt', |
| 'pc' |
| ]; |
| |
| let conversionFactors = { |
| 'deg': { |
| 'deg': 1, |
| 'rad': Math.PI / 180, |
| 'grad': 400 / 360, |
| 'turn': 1 / 360, |
| }, |
| 'rad': { |
| 'deg': 180 / Math.PI, |
| 'rad': 1, |
| 'grad': 200 / Math.PI, |
| 'turn': 0.5 / Math.PI, |
| }, |
| 'grad': { |
| 'deg': 360 / 400, |
| 'rad': Math.PI / 200, |
| 'grad': 1, |
| 'turn': 1 / 400, |
| }, |
| 'turn': { |
| 'deg': 360, |
| 'rad': 2 * Math.PI, |
| 'grad': 400, |
| 'turn': 1, |
| }, |
| // 96 px per in |
| // 2.54 cm per in |
| // 10 mm per cm |
| // 72 pt per in |
| // 6 pc per in |
| 'px': { |
| 'px': 1, |
| 'in': 1 / 96, |
| 'cm': 2.54 / 96, |
| 'mm': 25.4 / 96, |
| 'pt': 72 / 96, |
| 'pc': 6 / 96 |
| }, |
| 'in': { |
| 'px': 96, |
| 'in': 1, |
| 'cm': 2.54, |
| 'mm': 25.4, |
| 'pt': 72, |
| 'pc': 6 |
| }, |
| 'cm': { |
| 'px': 96 / 2.54, |
| 'in': 1 / 2.54, |
| 'cm': 1, |
| 'mm': 10, |
| 'pt': 72 / 2.54, |
| 'pc': 6 / 2.54 |
| }, |
| 'mm': { |
| 'px': 96 / 25.4, |
| 'in': 1 / 25.4, |
| 'cm': 1 / 10, |
| 'mm': 1, |
| 'pt': 72 / 25.4, |
| 'pc': 6 / 25.4 |
| }, |
| 'pt': { |
| 'px': 96 / 72, |
| 'in': 1 / 72, |
| 'cm': 2.54 / 72, |
| 'mm': 25.4 / 72, |
| 'pt': 1, |
| 'pc': 6 / 72, |
| }, |
| 'pc': { |
| 'px': 96 / 6, |
| 'in': 1 / 6, |
| 'cm': 2.54 / 6, |
| 'mm': 25.4 / 6, |
| 'pt': 72 / 6, |
| 'pc': 1 |
| } |
| } |
| |
| test(() => { |
| let unitValue = new CSSUnitValue(1, 'deg'); |
| assert_throws(new SyntaxError(), () => { |
| unitValue.to('bananas'); |
| }); |
| }, 'Converting to invalid unit throws'); |
| |
| test(() => { |
| let unitValue = new CSSUnitValue(1, 'deg'); |
| assert_throws(new TypeError(), () => { |
| unitValue.to('px'); |
| }); |
| }, 'Converting to a non-compatible unit throws'); |
| |
| for (let unit of angleUnits) { |
| for (let toUnit of angleUnits) { |
| test(() => { |
| let unitValue = new CSSUnitValue(1, unit); |
| let result = unitValue.to(toUnit); |
| assert_approx_equals( |
| result.value, conversionFactors[unit][toUnit], EPSILON); |
| assert_equals(result.unit, toUnit); |
| }, 'Converting angle unit ' + unit + ' to ' + toUnit); |
| } |
| } |
| |
| for (let unit of fixedLengthUnits) { |
| for (let toUnit of fixedLengthUnits) { |
| test(() => { |
| let unitValue = new CSSUnitValue(1, unit); |
| let result = unitValue.to(toUnit); |
| assert_approx_equals( |
| result.value, conversionFactors[unit][toUnit], EPSILON); |
| assert_equals(result.unit, toUnit); |
| }, 'Converting fixed length unit ' + unit + ' to ' + toUnit); |
| } |
| } |
| |
| </script> |
