Support graphql ListType (#2061)

src/printer-graphql.js

@@ -250,6 +250,14 @@ function genericPrint(path, options, print) {
       ]);
     }
 
+    case "ListType": {
+      return concat([
+        "[",
+        path.call(print, "type"),
+        "]"
+      ])
+    }
+
     default:
       throw new Error("unknown graphql type: " + JSON.stringify(n.kind));
   }

tests/graphql_variable_definitions/__snapshots__/jsfmt.spec.js.snap

@@ -10,6 +10,14 @@ $bar: String = "Long string here", $arg: String = "Hello world!",,,,,
 $nonNull: String!) {
   hello
 }
+
+query lists($foo: [Int  ], $bar:    [Int!], $arg: [ Int! ]!) {
+  ok
+}
+
+query listslong($foo: [String  ], $bar:    [String!], $arg: [ Int! ]!, $veryLongName: [ Int! ]) {
+  ok
+}
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 query short($foo: ComplexType, $site: Site = MOBILE, $nonNull: Int!) {
   hello
@@ -24,4 +32,17 @@ query long(
 ) {
   hello
 }
+
+query lists($foo: [Int], $bar: [Int!], $arg: [Int!]!) {
+  ok
+}
+
+query listslong(
+  $foo: [String],
+  $bar: [String!],
+  $arg: [Int!]!,
+  $veryLongName: [Int!]
+) {
+  ok
+}
 `;

tests/graphql_variable_definitions/variable_definitions.graphql

@@ -7,3 +7,11 @@ $bar: String = "Long string here", $arg: String = "Hello world!",,,,,
 $nonNull: String!) {
   hello
 }
+
+query lists($foo: [Int  ], $bar:    [Int!], $arg: [ Int! ]!) {
+  ok
+}
+
+query listslong($foo: [String  ], $bar:    [String!], $arg: [ Int! ]!, $veryLongName: [ Int! ]) {
+  ok
+}