[CSS Grid Layout] Flex tracks sizing alg must handle 0fr values

third_party/WebKit/LayoutTests/fast/css-grid-layout/resources/grid-columns-rows-get-set.js

 description('Test that setting and getting grid-template-columns and grid-template-rows works as expected');
 
 debug("Test getting grid-template-columns and grid-template-rows set through CSS");
 testGridDefinitionsValues(document.getElementById("gridWithNoneElement"), "none", "none");
 testGridDefinitionsValues(document.getElementById("gridWithFixedElement"), "10px", "15px");
 testGridDefinitionsValues(document.getElementById("gridWithPercentElement"), "400px", "150px");
 testGridDefinitionsValues(document.getElementById("gridWithPercentWithoutSize"), "0px", "0px");
 testGridDefinitionsValues(document.getElementById("gridWithPercentWithoutSizeWithChildren"), "7px", "11px");
 testGridDefinitionsValues(document.getElementById("gridWithAutoElement"), "0px", "0px");
 testGridDefinitionsValues(document.getElementById("gridWithAutoWithoutSizeElement"), "0px", "0px");
@@ skipping 44 matching lines @@
 testGridDefinitionsSetJSValues("minmax(min-content, 8vh)", "minmax(10vw, min-content)", "48px", "80px");
 testGridDefinitionsSetJSValues("minmax(22em, max-content)", "minmax(max-content, 5em)", "220px", "50px");
 testGridDefinitionsSetJSValues("minmax(min-content, max-content)", "minmax(max-content, min-content)", "0px", "0px");
 testGridDefinitionsSetJSValues("minmax(auto, max-content)", "minmax(10vw, auto)", "0px", "80px");
 // Unit comparison should be case-insensitive.
 testGridDefinitionsSetJSValues("3600Fr", "154fR", "800px", "600px", "3600fr", "154fr");
 // Float values are allowed.
 testGridDefinitionsSetJSValues("3.1459fr", "2.718fr", "800px", "600px");
 // A leading '+' is allowed.
 testGridDefinitionsSetJSValues("+3fr", "+4fr", "800px", "600px", "3fr", "4fr");
+// Flex factor values can be zero.
+testGridDefinitionsSetJSValues("0fr", ".0fr", "0px", "0px", "0fr", "0fr");
+testGridDefinitionsSetJSValues("minmax(0fr, 0fr)", "minmax(.0fr, .0fr)", "0px", "0px", "minmax(0fr, 0fr)", "minmax(0fr, 0fr)");
 
 debug("");
 debug("Test getting and setting grid-template-columns and grid-template-rows to calc() values through JS");
 testGridDefinitionsSetJSValues("calc(150px)", "calc(75px)", "150px", "75px");
 testGridDefinitionsSetJSValues("calc(50% - 30px)", "calc(75px + 10%)", "370px", "135px");
 testGridDefinitionsSetJSValues("minmax(25%, calc(30px))", "minmax(calc(75%), 40px)", "200px", "450px", "minmax(25%, calc(30px))", "minmax(calc(75%), 40px)");
 testGridDefinitionsSetJSValues("minmax(10%, calc(30px + 10%))", "minmax(calc(25% - 50px), 200px)", "110px", "200px", "minmax(10%, calc(30px + 10%))", "minmax(calc(25% - 50px), 200px)");
 
 debug("");
 debug("Test setting grid-template-columns and grid-template-rows to bad values through JS");
 // No comma and only 1 argument provided.
 testGridDefinitionsSetBadJSValues("minmax(10px 20px)", "minmax(10px)")
 // Nested minmax and only 2 arguments are allowed.
 testGridDefinitionsSetBadJSValues("minmax(minmax(10px, 20px), 20px)", "minmax(10px, 20px, 30px)");
 // No breadth value and no comma.
 testGridDefinitionsSetBadJSValues("minmax()", "minmax(30px 30% 30em)");
 testGridDefinitionsSetBadJSValues("-2fr", "3ffr");
 testGridDefinitionsSetBadJSValues("-2.05fr", "+-3fr");
-testGridDefinitionsSetBadJSValues("0fr", "1r");
+testGridDefinitionsSetBadJSValues("1f", "1r");
 // A dimension doesn't allow spaces between the number and the unit.
-testGridDefinitionsSetBadJSValues(".0000fr", "13 fr");
+testGridDefinitionsSetBadJSValues(".1 fr", "13 fr");
 testGridDefinitionsSetBadJSValues("7.-fr", "-8,0fr");
 // Negative values are not allowed.
 testGridDefinitionsSetBadJSValues("-1px", "-6em");
 testGridDefinitionsSetBadJSValues("minmax(-1%, 32%)", "minmax(2vw, -6em)");
 // Invalid expressions with calc
 testGridDefinitionsSetBadJSValues("calc(16px 30px)", "calc(25px + auto)");
 testGridDefinitionsSetBadJSValues("minmax(min-content, calc())", "calc(10%(");
 // Forward slash not allowed if not part of a shorthand
 testGridDefinitionsSetBadJSValues("10px /", "15px /");
 
@@ skipping 40 matching lines @@
     element.style.gridTemplateColumns = "initial";
     element.style.gridTemplateRows = "initial";
     shouldBe("getComputedStyle(element, '').getPropertyValue('grid-template-columns')", "'none'");
     shouldBe("getComputedStyle(element, '').getPropertyValue('grid-template-rows')", "'none'");
 
     document.body.removeChild(element);
 }
 debug("");
 debug("Test setting grid-template-columns and grid-template-rows to 'initial' through JS");
 testInitial();