The Tor Browser: comparison layout/style/test/flexbox_layout_testcases.js

comparison: layout/style/test/flexbox_layout_testcases.js

layout/style/test/flexbox_layout_testcases.js

branch: TOR_BUG_3246
changeset 6: 8bccb770b82d

equal deleted inserted replaced

--1:000000000000
+:d82c1493ea21
+/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=2 sw=2 sts=2 et: */
+/*
+* This Source Code is subject to the terms of the Mozilla Public License
+* version 2.0 (the "License"). You can obtain a copy of the License at
+* http://mozilla.org/MPL/2.0/.
+*/
+/**
+* For the purposes of this test, flex items are specified as a hash with a
+* hash-entry for each CSS property that is to be set.  In these per-property
+* entries, the key is the property-name, and the value can be either of the
+* following:
+*  (a) the property's specified value (which indicates that we don't need to
+*      bother checking the computed value of this particular property)
+*  ...OR...
+*  (b) an array with 2-3 entries...
+*        [specifiedValue, expectedComputedValue (, epsilon) ]
+*      ...which indicates that the property's computed value should be
+*      checked.  The array's first entry (for the specified value) may be
+*      null; this means that no value should be explicitly specified for this
+*      property. The second entry is the property's expected computed
+*      value. The third (optional) entry is an epsilon value, which allows for
+*      fuzzy equality when testing the computed value.
+*
+* To allow these testcases to be re-used in both horizontal and vertical
+* flex containers, we specify "width"/"min-width"/etc. using the aliases
+* "_main-size", "_min-main-size", etc.  The test code can map these
+* placeholder names to their corresponding property-names using the maps
+* defined below -- gRowPropertyMapping, gColumnPropertyMapping, etc.
+*
+* If the testcase needs to customize its flex container at all (e.g. by
+* specifying a custom container-size), it can do so by including a hash
+* called "container_properties", with propertyName:propertyValue mappings.
+* (This hash can use aliased property-names like "_main-size" as well.)
+*/
+// The standard main-size we'll use for our flex container when setting up
+// the testcases defined below:
+var gDefaultFlexContainerSize = "200px";
+// Left-to-right versions of placeholder property-names used in
+// testcases below:
+var gRowPropertyMapping =
+{
+"_main-size":               "width",
+"_min-main-size":           "min-width",
+"_max-main-size":           "max-width",
+"_border-main-start-width": "border-left-width",
+"_border-main-end-width":   "border-right-width",
+"_padding-main-start":      "padding-left",
+"_padding-main-end":        "padding-right",
+"_margin-main-start":       "margin-left",
+"_margin-main-end":         "margin-right"
+};
+// Right-to-left versions of placeholder property-names used in
+// testcases below:
+var gRowReversePropertyMapping =
+{
+"_main-size":               "width",
+"_min-main-size":           "min-width",
+"_max-main-size":           "max-width",
+"_border-main-start-width": "border-right-width",
+"_border-main-end-width":   "border-left-width",
+"_padding-main-start":      "padding-right",
+"_padding-main-end":        "padding-left",
+"_margin-main-start":       "margin-right",
+"_margin-main-end":         "margin-left"
+};
+// Top-to-bottom versions of placeholder property-names used in
+// testcases below:
+var gColumnPropertyMapping =
+{
+"_main-size":               "height",
+"_min-main-size":           "min-height",
+"_max-main-size":           "max-height",
+"_border-main-start-width": "border-top-width",
+"_border-main-end-width":   "border-bottom-width",
+"_padding-main-start":      "padding-top",
+"_padding-main-end":        "padding-bottom",
+"_margin-main-start":       "margin-top",
+"_margin-main-end":         "margin-bottom"
+};
+// Bottom-to-top versions of placeholder property-names used in
+// testcases below:
+var gColumnReversePropertyMapping =
+{
+"_main-size":               "height",
+"_min-main-size":           "min-height",
+"_max-main-size":           "max-height",
+"_border-main-start-width": "border-bottom-width",
+"_border-main-end-width":   "border-top-width",
+"_padding-main-start":      "padding-bottom",
+"_padding-main-end":        "padding-top",
+"_margin-main-start":       "margin-bottom",
+"_margin-main-end":         "margin-top"
+};
+// The list of actual testcase definitions:
+var gFlexboxTestcases =
+[
+// No flex properties specified --> should just use 'width' for sizing
+{
+items:
+[
+{ "_main-size": [ "40px", "40px" ] },
+{ "_main-size": [ "65px", "65px" ] },
+]
+},
+// flex-basis is specified:
+{
+items:
+[
+{ "flex-basis": "50px",
+"_main-size": [ null,  "50px" ]
+},
+{
+"flex-basis": "20px",
+"_main-size": [ null, "20px" ]
+},
+]
+},
+// flex-basis is *large* -- sum of flex-basis values is > flex container size:
+// (w/ 0 flex-shrink so we don't shrink):
+{
+items:
+[
+{
+"flex": "0 0 150px",
+"_main-size": [ null, "150px" ]
+},
+{
+"flex": "0 0 90px",
+"_main-size": [ null, "90px" ]
+},
+]
+},
+// flex-basis is *large* -- each flex-basis value is > flex container size:
+// (w/ 0 flex-shrink so we don't shrink):
+{
+items:
+[
+{
+"flex": "0 0 250px",
+"_main-size": [ null, "250px" ]
+},
+{
+"flex": "0 0 400px",
+"_main-size": [ null, "400px" ]
+},
+]
+},
+// flex-basis has percentage value:
+{
+items:
+[
+{
+"flex-basis": "30%",
+"_main-size": [ null, "60px" ]
+},
+{
+"flex-basis": "45%",
+"_main-size": [ null, "90px" ]
+},
+]
+},
+// flex-basis has calc(percentage) value:
+{
+items:
+[
+{
+"flex-basis": "calc(20%)",
+"_main-size": [ null, "40px" ]
+},
+{
+"flex-basis": "calc(80%)",
+"_main-size": [ null, "160px" ]
+},
+]
+},
+// flex-basis has calc(percentage +/- length) value:
+{
+items:
+[
+{
+"flex-basis": "calc(10px + 20%)",
+"_main-size": [ null, "50px" ]
+},
+{
+"flex-basis": "calc(60% - 1px)",
+"_main-size": [ null, "119px" ]
+},
+]
+},
+// flex-grow is specified:
+{
+items:
+[
+{
+"flex": "1",
+"_main-size": [ null,  "60px" ]
+},
+{
+"flex": "2",
+"_main-size": [ null, "120px" ]
+},
+{
+"flex": "0 20px",
+"_main-size": [ null, "20px" ]
+}
+]
+},
+// Same ratio as prev. testcase; making sure we handle float inaccuracy
+{
+items:
+[
+{
+"flex": "100000",
+"_main-size": [ null,  "60px" ]
+},
+{
+"flex": "200000",
+"_main-size": [ null, "120px" ]
+},
+{
+"flex": "0.000001 20px",
+"_main-size": [ null,  "20px" ]
+}
+]
+},
+// Same ratio as prev. testcase, but with items cycled and w/
+// "flex: none" & explicit size instead of "flex: 0 20px"
+{
+items:
+[
+{
+"flex": "none",
+"_main-size": [ "20px", "20px" ]
+},
+{
+"flex": "1",
+"_main-size": [ null,   "60px" ]
+},
+{
+"flex": "2",
+"_main-size": [ null,  "120px" ]
+}
+]
+},
+// ...and now with flex-grow:[huge] to be sure we handle infinite float values
+// gracefully.
+{
+items:
+[
+{
+"flex": "9999999999999999999999999999999999999999999999999999999",
+"_main-size": [ null,  "200px" ]
+},
+]
+},
+{
+items:
+[
+{
+"flex": "9999999999999999999999999999999999999999999999999999999",
+"_main-size": [ null,  "50px" ]
+},
+{
+"flex": "9999999999999999999999999999999999999999999999999999999",
+"_main-size": [ null,  "50px" ]
+},
+{
+"flex": "9999999999999999999999999999999999999999999999999999999",
+"_main-size": [ null,  "50px" ]
+},
+{
+"flex": "9999999999999999999999999999999999999999999999999999999",
+"_main-size": [ null,  "50px" ]
+},
+]
+},
+{
+items:
+[
+{
+"flex": "99999999999999999999999999999999999",
+"_main-size": [ null,  "50px" ]
+},
+{
+"flex": "99999999999999999999999999999999999",
+"_main-size": [ null,  "50px" ]
+},
+{
+"flex": "99999999999999999999999999999999999",
+"_main-size": [ null,  "50px" ]
+},
+{
+"flex": "99999999999999999999999999999999999",
+"_main-size": [ null,  "50px" ]
+},
+]
+},
+// And now, some testcases to check that we handle float accumulation error
+// gracefully.
+// First, a testcase with just a custom-sized huge container, to be sure we'll
+// be able to handle content on that scale, in the subsequent more-complex
+// testcases:
+{
+container_properties:
+{
+"_main-size": "9000000px"
+},
+items:
+[
+{
+"flex": "1",
+"_main-size": [ null,  "9000000px" ]
+},
+]
+},
+// ...and now with two flex items dividing up that container's huge size:
+{
+container_properties:
+{
+"_main-size": "9000000px"
+},
+items:
+[
+{
+"flex": "2",
+"_main-size": [ null,  "6000000px" ]
+},
+{
+"flex": "1",
+"_main-size": [ null,  "3000000px" ]
+},
+]
+},
+// OK, now to actually test accumulation error. Below, we have six flex items
+// splitting up the container's size, with huge differences between flex
+// weights.  For simplicity, I've set up the weights so that they sum exactly
+// to the container's size in px. So 1 unit of flex *should* get you 1px.
+//
+// NOTE: The expected computed "_main-size" values for the flex items below
+// appear to add up to more than their container's size, which would suggest
+// that they overflow their container unnecessarily. But they don't actually
+// overflow -- this discrepancy is simply because Gecko's code for reporting
+// computed-sizes rounds to 6 significant figures (in particular, the method
+// (nsTSubstring_CharT::AppendFloat() does this).  Internally, in app-units,
+// the child frames' main-sizes add up exactly to the container's main-size,
+// as you'd hope & expect.
+{
+container_properties:
+{
+"_main-size": "9000000px"
+},
+items:
+[
+{
+"flex": "3000000",
+"_main-size": [ null,  "3000000px" ]
+},
+{
+"flex": "1",
+"_main-size": [ null,  "1px" ]
+},
+{
+"flex": "1",
+"_main-size": [ null,  "1px" ]
+},
+{
+"flex": "2999999",
+// NOTE: Expected value is off slightly, from float error when
+// resolving flexible lengths & when generating computed value string:
+"_main-size": [ null,  "3000000px" ]
+},
+{
+"flex": "2999998",
+// NOTE: Expected value is off slightly, from float error when
+// resolving flexible lengths & when generating computed value string:
+"_main-size": [ null,  "3000000px" ]
+},
+{
+"flex": "1",
+"_main-size": [ null,  "1px", 0.2 ]
+},
+]
+},
+// Same flex items as previous testcase, but now reordered such that the items
+// with tiny flex weights are all listed last:
+{
+container_properties:
+{
+"_main-size": "9000000px"
+},
+items:
+[
+{
+"flex": "3000000",
+"_main-size": [ null,  "3000000px" ]
+},
+{
+"flex": "2999999",
+// NOTE: Expected value is off slightly, from float error when
+// resolving flexible lengths & when generating computed value string:
+"_main-size": [ null,  "3000000px" ]
+},
+{
+"flex": "2999998",
+// NOTE: Expected value is off slightly, from float error when
+// resolving flexible lengths & when generating computed value string:
+"_main-size": [ null,  "3000000px" ]
+},
+{
+"flex": "1",
+"_main-size": [ null,  "1px", 0.2 ]
+},
+{
+"flex": "1",
+"_main-size": [ null,  "1px", 0.2 ]
+},
+{
+"flex": "1",
+"_main-size": [ null,  "1px", 0.2 ]
+},
+]
+},
+// Same flex items as previous testcase, but now reordered such that the items
+// with tiny flex weights are all listed first:
+{
+container_properties:
+{
+"_main-size": "9000000px"
+},
+items:
+[
+{
+"flex": "1",
+// NOTE: Expected value is off slightly, from float error when
+// resolving flexible lengths:
+"_main-size": [ null,  "1px", 0.2 ]
+},
+{
+"flex": "1",
+// NOTE: Expected value is off slightly, from float error when
+// resolving flexible lengths:
+"_main-size": [ null,  "1px", 0.2 ]
+},
+{
+"flex": "1",
+// NOTE: Expected value is off slightly, from float error when
+// resolving flexible lengths:
+"_main-size": [ null,  "1px", 0.2 ]
+},
+{
+"flex": "3000000",
+"_main-size": [ null,  "3000000px" ]
+},
+{
+"flex": "2999999",
+// NOTE: Expected value is off slightly, from float error when
+// resolving flexible lengths & when generating computed value string:
+"_main-size": [ null,  "3000000px" ]
+},
+{
+"flex": "2999998",
+// NOTE: Expected value is off slightly, from float error when
+// resolving flexible lengths & when generating computed value string:
+"_main-size": [ null,  "3000000px" ]
+},
+]
+},
+// Trying "flex: auto" (== "1 1 auto") w/ a mix of flex-grow/flex-basis values
+{
+items:
+[
+{
+"flex": "auto",
+"_main-size": [ null, "45px" ]
+},
+{
+"flex": "2",
+"_main-size": [ null, "90px" ]
+},
+{
+"flex": "20px 1 0",
+"_main-size": [ null, "65px" ]
+}
+]
+},
+// Same as previous, but with items cycled & different syntax
+{
+items:
+[
+{
+"flex": "20px",
+"_main-size": [ null, "65px" ]
+},
+{
+"flex": "1",
+"_main-size": [ null, "45px" ]
+},
+{
+"flex": "2",
+"_main-size": [ null, "90px" ]
+}
+]
+},
+{
+items:
+[
+{
+"flex": "2",
+"_main-size": [ null,  "100px" ],
+"border": "0px dashed",
+"_border-main-start-width": [ "5px",  "5px" ],
+"_border-main-end-width": [ "15px", "15px" ],
+"_margin-main-start": [ "22px", "22px" ],
+"_margin-main-end": [ "8px", "8px" ]
+},
+{
+"flex": "1",
+"_main-size": [ null,  "50px" ],
+"_margin-main-start": [ "auto", "0px" ],
+"_padding-main-end": [ "auto", "0px" ],
+}
+]
+},
+// Test negative flexibility:
+// Basic testcase: just 1 item (relying on initial "flex-shrink: 1") --
+// should shrink to container size.
+{
+items:
+[
+{ "_main-size": [ "400px",  "200px" ] },
+],
+},
+// ...and now with a "flex" specification and a different flex-shrink value:
+{
+items:
+[
+{
+"flex": "4 2 250px",
+"_main-size": [ null,  "200px" ]
+},
+],
+},
+// ...and now with multiple items, which all shrink proportionally (by 50%)
+// to fit to the container, since they have the same (initial) flex-shrink val
+{
+items:
+[
+{ "_main-size": [ "80px",   "40px" ] },
+{ "_main-size": [ "40px",   "20px" ] },
+{ "_main-size": [ "30px",   "15px" ] },
+{ "_main-size": [ "250px", "125px" ] },
+]
+},
+// ...and now with positive flexibility specified. (should have no effect, so
+// everything still shrinks by the same proportion, since the flex-shrink
+// values are all the same).
+{
+items:
+[
+{
+"flex": "4 3 100px",
+"_main-size": [ null,  "80px" ]
+},
+{
+"flex": "5 3 50px",
+"_main-size": [ null,  "40px" ]
+},
+{
+"flex": "0 3 100px",
+"_main-size": [ null, "80px" ]
+}
+]
+},
+// ...and now with *different* flex-shrink values:
+{
+items:
+[
+{
+"flex": "4 2 50px",
+"_main-size": [ null,  "30px" ]
+},
+{
+"flex": "5 3 50px",
+"_main-size": [ null,  "20px" ]
+},
+{
+"flex": "0 0 150px",
+"_main-size": [ null, "150px" ]
+}
+]
+},
+// Same ratio as prev. testcase; making sure we handle float inaccuracy
+{
+items:
+[
+{
+"flex": "4 20000000 50px",
+"_main-size": [ null,  "30px" ]
+},
+{
+"flex": "5 30000000 50px",
+"_main-size": [ null,  "20px" ]
+},
+{
+"flex": "0 0.0000001 150px",
+"_main-size": [ null, "150px" ]
+}
+]
+},
+// Another "different flex-shrink values" testcase:
+{
+items:
+[
+{
+"flex": "4 2 115px",
+"_main-size": [ null,  "69px" ]
+},
+{
+"flex": "5 1 150px",
+"_main-size": [ null,  "120px" ]
+},
+{
+"flex": "1 4 30px",
+"_main-size": [ null,  "6px" ]
+},
+{
+"flex": "1 0 5px",
+"_main-size": [ null, "5px" ]
+},
+]
+},
+// ...and now with min-size (clamping the effects of flex-shrink on one item):
+{
+items:
+[
+{
+"flex": "4 5 75px",
+"_min-main-size": "50px",
+"_main-size": [ null,  "50px" ],
+},
+{
+"flex": "5 5 100px",
+"_main-size": [ null,  "62.5px" ]
+},
+{
+"flex": "0 4 125px",
+"_main-size": [ null, "87.5px" ]
+}
+]
+},
+// Test a min-size that's much larger than initial preferred size, but small
+// enough that our flexed size pushes us over it:
+{
+items:
+[
+{
+"flex": "auto",
+"_min-main-size": "110px",
+"_main-size": [ "50px",  "125px" ]
+},
+{
+"flex": "auto",
+"_main-size": [ null, "75px" ]
+}
+]
+},
+// Test a min-size that's much larger than initial preferred size, and is
+// even larger than our positively-flexed size, so that we have to increase it
+// (as a 'min violation') after we've flexed.
+{
+items:
+[
+{
+"flex": "auto",
+"_min-main-size": "150px",
+"_main-size": [ "50px",  "150px" ]
+},
+{
+"flex": "auto",
+"_main-size": [ null, "50px" ]
+}
+]
+},
+// Test min-size on multiple items simultaneously:
+{
+items:
+[
+{
+"flex": "auto",
+"_min-main-size": "20px",
+"_main-size": [ null,  "20px" ]
+},
+{
+"flex": "9 auto",
+"_min-main-size": "150px",
+"_main-size": [ "50px",  "180px" ]
+},
+]
+},
+{
+items:
+[
+{
+"flex": "1 1 0px",
+"_min-main-size": "90px",
+"_main-size": [ null, "90px" ]
+},
+{
+"flex": "1 1 0px",
+"_min-main-size": "80px",
+"_main-size": [ null, "80px" ]
+},
+{
+"flex": "1 1 40px",
+"_main-size": [ null, "30px" ]
+}
+]
+},
+// Test a case where _min-main-size will be violated on different items in
+// successive iterations of the "resolve the flexible lengths" loop
+{
+items:
+[
+{
+"flex": "1 2 100px",
+"_min-main-size": "90px",
+"_main-size": [ null, "90px" ]
+},
+{
+"flex": "1 1 100px",
+"_min-main-size": "70px",
+"_main-size": [ null, "70px" ]
+},
+{
+"flex": "1 1 100px",
+"_main-size": [ null, "40px" ]
+}
+]
+},
+// Test some cases that have a min-size violation on one item and a
+// max-size violation on another:
+// Here, both items initially grow to 100px. That violates both
+// items' sizing constraints (it's smaller than the min-size and larger than
+// the max-size), so we clamp both of them and sum the clamping-differences:
+//
+//   (130px - 100px) + (50px - 100px) = (30px) + (-50px) = -20px
+//
+// This sum is negative, so (per spec) we freeze the item that had its
+// max-size violated (the second one) and restart the algorithm.  This time,
+// all the available space (200px - 50px = 150px) goes to the not-yet-frozen
+// first item, and that puts it above its min-size, so all is well.
+{
+items:
+[
+{
+"flex": "auto",
+"_min-main-size": "130px",
+"_main-size": [ null, "150px" ]
+},
+{
+"flex": "auto",
+"_max-main-size": "50px",
+"_main-size": [ null,  "50px" ]
+},
+]
+},
+// As above, both items initially grow to 100px, and that violates both items'
+// constraints. However, now the sum of the clamping differences is:
+//
+//   (130px - 100px) + (80px - 100px) = (30px) + (-20px) = 10px
+//
+// This sum is positive, so (per spec) we freeze the item that had its
+// min-size violated (the first one) and restart the algorithm. This time,
+// all the available space (200px - 130px = 70px) goes to the not-yet-frozen
+// second item, and that puts it below its max-size, so all is well.
+{
+items:
+[
+{
+"flex": "auto",
+"_min-main-size": "130px",
+"_main-size": [ null, "130px" ]
+},
+{
+"flex": "auto",
+"_max-main-size": "80px",
+"_main-size": [ null,  "70px" ]
+},
+]
+},
+// As above, both items initially grow to 100px, and that violates both items'
+// constraints. So we clamp both items and sum the clamping differences to
+// see what to do next.  The sum is:
+//
+//   (80px - 100px) + (120px - 100px) = (-20px) + (20px) = 0px
+//
+// Per spec, if the sum is 0, we're done -- we leave both items at their
+// clamped sizes.
+{
+items:
+[
+{
+"flex": "auto",
+"_max-main-size": "80px",
+"_main-size": [ null,  "80px" ]
+},
+{
+"flex": "auto",
+"_min-main-size": "120px",
+"_main-size": [ null, "120px" ]
+},
+]
+},
+];