<!DOCTYPE html><!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. --><metacharset="UTF-8"><title>Canvas test: 2d.text.drawing.style.letterSpacing.measure</title><scriptsrc="/resources/testharness.js"></script><scriptsrc="/resources/testharnessreport.js"></script><scriptsrc="/html/canvas/resources/canvas-tests.js"></script><linkrel="stylesheet"href="/html/canvas/resources/canvas-tests.css"><bodyclass="show_output"><h1>2d.text.drawing.style.letterSpacing.measure</h1><pclass="desc">Testing letter spacing with different length units</p><pclass="output">Actual output:</p><canvasid="c"class="output"width="100"height="50"><pclass="fallback">FAIL (fallback content)</p></canvas><ulid="d"></ul><script>vart=async_test("Testing letter spacing with different length units");_addTest(function(canvas,ctx){_assertSame(ctx.letterSpacing,'0px',"ctx.letterSpacing","'0px'");_assertSame(ctx.wordSpacing,'0px',"ctx.wordSpacing","'0px'");varwidth_normal=ctx.measureText('Hello World').width;functiontest_letter_spacing(value,difference_spacing,epsilon){ctx.letterSpacing=value;_assertSame(ctx.letterSpacing,value,"ctx.letterSpacing","value");_assertSame(ctx.wordSpacing,'0px',"ctx.wordSpacing","'0px'");width_with_letter_spacing=ctx.measureText('Hello World').width;assert_approx_equals(width_with_letter_spacing,width_normal+difference_spacing,epsilon,"letter spacing doesn't work.");}// The first value is the letter Spacing to be set, the second value the// change in length of string 'Hello World', note that there are 11 letters// in 'hello world', so the length difference is always letterSpacing * 11.// and the third value is the acceptable differencee for the length change,// note that unit such as 1cm/1mm doesn't map to an exact pixel value.test_cases=[['3px',33,0.1],['5px',55,0.1],['-2px',-22,0.1],['1em',110,0.1],['-0.1em',-11,0.1],['1in',1056,0.1],['-0.1cm',-41.65,0.2],['-0.6mm',-24,95,0.2]]for(consttest_caseoftest_cases){test_letter_spacing(test_case[0],test_case[1],test_case[2]);}});</script>
