This is a testharness.js-based test.
PASS display: grid 
PASS display: inline-grid 
PASS grid-template-columns 
PASS grid-template-columns.initial 
PASS grid-template-columns.none 
PASS grid-template-columns.<line-names> 
PASS grid-template-columns.<track-size>.auto 
PASS grid-template-columns.<track-size>.<track-breadth>.<length> 
PASS grid-template-columns.<track-size>.<track-breadth>.<percentage> 
PASS grid-template-columns.<track-size>.<track-breadth>.<flex> 
PASS grid-template-columns.<track-size>.<track-breadth>.min-content 
PASS grid-template-columns.<track-size>.<track-breadth>.max-content 
PASS grid-template-columns.<track-size>.<track-breadth>.minmax() 
PASS grid-template-columns.reset 
PASS grid-template-rows 
PASS grid-template-rows.initial 
PASS grid-template-rows.none 
PASS grid-template-rows.<line-names> 
PASS grid-template-rows.<track-size>.auto 
PASS grid-template-rows.<track-size>.<track-breadth>.<length> 
PASS grid-template-rows.<track-size>.<track-breadth>.<percentage> 
PASS grid-template-rows.<track-size>.<track-breadth>.<flex> 
PASS grid-template-rows.<track-size>.<track-breadth>.min-content 
PASS grid-template-rows.<track-size>.<track-breadth>.max-content 
PASS grid-template-rows.<track-size>.<track-breadth>.minmax() 
PASS grid-template-rows.reset 
PASS grid-template-areas 
PASS grid-template-areas.initial 
PASS grid-template-areas.none 
PASS grid-template-areas.<string>+ 
PASS grid-template-areas.reset 
PASS grid-template 
FAIL grid-template.initial assert_equals: initial value of grid-template should be 150px / 50px 50px 50px expected "150px / 50px 50px 50px" but got "50px 50px 50px / 150px / none"
FAIL grid-template.none assert_equals: none expected "150px / 50px 50px 50px" but got "50px 50px 50px / 150px / none"
FAIL grid-template.<grid-template-rows> / <grid-template-columns> assert_equals: <grid-template-rows> / <grid-template-columns> expected "100px 100px / 200px 200px" but got ""
FAIL grid-template.<line-names> assert_equals: <line-names> expected "[a] auto [b] auto [c] / [d] auto [e] auto [f]" but got ""
FAIL grid-template.<string>+ assert_equals: <string>+ expected "\"a b\" \"a b\"" but got ""
FAIL grid-template.<string><track-size>+ assert_equals: <string><track-size>+ expected "100px / \"a b\" 50px" but got ""
FAIL grid-template.reset assert_equals: reset expected "150px / 50px 50px 50px" but got "50px 50px 50px / 150px / none"
PASS grid-auto-columns 
PASS grid-auto-columns.initial 
PASS grid-auto-columns.<track-size>.auto 
PASS grid-auto-columns.<track-size>.<track-breadth>.<length> 
PASS grid-auto-columns.<track-size>.<track-breadth>.<percentage> 
PASS grid-auto-columns.<track-size>.<track-breadth>.<flex> 
PASS grid-auto-columns.<track-size>.<track-breadth>.min-content 
PASS grid-auto-columns.<track-size>.<track-breadth>.max-content 
PASS grid-auto-columns.<track-size>.<track-breadth>.minmax() 
PASS grid-auto-columns.reset 
PASS grid-auto-rows 
PASS grid-auto-rows.initial 
PASS grid-auto-rows.<track-size>.auto 
PASS grid-auto-rows.<track-size>.<track-breadth>.<length> 
PASS grid-auto-rows.<track-size>.<track-breadth>.<percentage> 
PASS grid-auto-rows.<track-size>.<track-breadth>.<flex> 
PASS grid-auto-rows.<track-size>.<track-breadth>.min-content 
PASS grid-auto-rows.<track-size>.<track-breadth>.max-content 
PASS grid-auto-rows.<track-size>.<track-breadth>.minmax() 
PASS grid-auto-rows.reset 
PASS grid-auto-flow 
PASS grid-auto-flow.initial 
PASS grid-auto-flow.row 
PASS grid-auto-flow.column 
PASS grid-auto-flow.dense 
PASS grid-auto-flow.row dense 
PASS grid-auto-flow.column dense 
PASS grid-auto-flow.reset 
PASS grid-row-start 
PASS grid-row-start.initial 
PASS grid-row-start.auto 
PASS grid-row-start.<custom-ident> 
PASS grid-row-start.<integer> 
PASS grid-row-start.<integer> <ident> 
PASS grid-row-start.span <integer> 
PASS grid-row-start.span <custom-ident> 
PASS grid-row-start.span <integer> <custom-ident> 
PASS grid-row-start.reset 
PASS grid-column-start 
PASS grid-column-start.initial 
PASS grid-column-start.auto 
PASS grid-column-start.<custom-ident> 
PASS grid-column-start.<integer> 
PASS grid-column-start.<integer> <ident> 
PASS grid-column-start.span <integer> 
PASS grid-column-start.span <custom-ident> 
PASS grid-column-start.span <integer> <custom-ident> 
PASS grid-column-start.reset 
PASS grid-row-end 
PASS grid-row-end.initial 
PASS grid-row-end.auto 
PASS grid-row-end.<custom-ident> 
PASS grid-row-end.<integer> 
PASS grid-row-end.<integer> <ident> 
PASS grid-row-end.span <integer> 
PASS grid-row-end.span <custom-ident> 
PASS grid-row-end.span <integer> <custom-ident> 
PASS grid-row-end.reset 
PASS grid-column-end 
PASS grid-column-end.initial 
PASS grid-column-end.auto 
PASS grid-column-end.<custom-ident> 
PASS grid-column-end.<integer> 
PASS grid-column-end.<integer> <ident> 
PASS grid-column-end.span <integer> 
PASS grid-column-end.span <custom-ident> 
PASS grid-column-end.span <integer> <custom-ident> 
PASS grid-column-end.reset 
PASS grid-column 
FAIL grid-column.initial assert_equals: initial value of grid-column should be auto expected "auto" but got "auto / auto"
FAIL grid-column.auto assert_equals: auto expected "auto" but got "auto / auto"
PASS grid-column.<custom-ident> 
FAIL grid-column.<integer> start assert_equals: <integer> start expected "1" but got "1 / auto"
PASS grid-column.<integer> 
PASS grid-column.<integer> <ident> 
PASS grid-column.span <integer> 
PASS grid-column.span <custom-ident> 
PASS grid-column.span <integer> <custom-ident> 
FAIL grid-column.reset assert_equals: reset expected "auto" but got "auto / auto"
PASS grid-row 
FAIL grid-row.initial assert_equals: initial value of grid-row should be auto expected "auto" but got "auto / auto"
FAIL grid-row.auto assert_equals: auto expected "auto" but got "auto / auto"
PASS grid-row.<custom-ident> 
FAIL grid-row.<integer> start assert_equals: <integer> start expected "1" but got "1 / auto"
PASS grid-row.<integer> 
PASS grid-row.<integer> <ident> 
PASS grid-row.span <integer> 
PASS grid-row.span <custom-ident> 
PASS grid-row.span <integer> <custom-ident> 
FAIL grid-row.reset assert_equals: reset expected "auto" but got "auto / auto"
PASS grid-area 
FAIL grid-area.initial assert_equals: initial value of grid-area should be auto expected "auto" but got "auto / auto / auto / auto"
FAIL grid-area.auto assert_equals: auto expected "auto" but got "auto / auto / auto / auto"
PASS grid-area.<custom-ident> 
FAIL grid-area.<integer> start assert_equals: <integer> start expected "1 / 2" but got "1 / 2 / auto / auto"
PASS grid-area.<integer> 
PASS grid-area.<integer> <ident> 
PASS grid-area.span <integer> 
PASS grid-area.span <custom-ident> 
PASS grid-area.span <integer> <custom-ident> 
FAIL grid-area.reset assert_equals: reset expected "auto" but got "auto / auto / auto / auto"
Harness: the test ran to completion.

