Update array parsing tests

Author: shulhi

jscomp/syntax/tests/parsing/grammar/expressions/array.res

@@ -5,3 +5,18 @@ let x = [1, 2, 3,]
 
 // with constrained expressions
 let x = [1 :int, (2: int), 3 : int]
+
+// spread
+let x = [4, 5, ...y]
+
+// spread anywhere
+let x = [4, 5, ...y, 7, ...y]
+
+// spread constrained expressions
+let x = [4, 5, ...y: array<int>]
+
+// spread with other variable
+let x = [4, 5, k, ...y]
+
+// the only spread
+let x = [...y]

jscomp/syntax/tests/parsing/grammar/expressions/expected/array.res.txt

@@ -1,3 +1,8 @@
 let x = [|1;2;3|]
 let x = [|1;2;3|]
-let x = [|(1 : int);(2 : int);(3 : int)|]
+let x = [|(1 : int);(2 : int);(3 : int)|]
+let x = ((Belt.Array.concatMany)[@res.spread ]) [|[|4;5|];y|]
+let x = ((Belt.Array.concatMany)[@res.spread ]) [|[|4;5|];y;[|7|];y|]
+let x = ((Belt.Array.concatMany)[@res.spread ]) [|[|4;5|];(y : int array)|]
+let x = ((Belt.Array.concatMany)[@res.spread ]) [|[|4;5;k|];y|]
+let x = ((Belt.Array.concatMany)[@res.spread ]) [|y|]