Print description of enum and input for GraphQL (#3633)

src/language-graphql/printer-graphql.js

@@ -374,6 +374,8 @@ function genericPrint(path, options, print) {
 
     case "EnumValueDefinition": {
       return concat([
+        path.call(print, "description"),
+        n.description ? hardline : "",
         path.call(print, "name"),
         printDirectives(path, print, n)
       ]);
@@ -381,6 +383,8 @@ function genericPrint(path, options, print) {
 
     case "InputValueDefinition": {
       return concat([
+        path.call(print, "description"),
+        n.description ? (n.description.block ? hardline : line) : "",
         path.call(print, "name"),
         ": ",
         path.call(print, "type"),

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

@@ -29,6 +29,26 @@ of the \`one\` field.
 """
   one: Type
 }
+
+type Foo {
+q("docs" field: String): Type
+q("A long string of description of the field parameter to make this break" field: String): Type
+q("""docs""" field: String): Type
+}
+
+enum Enum {
+"""
+Description of \`one\`
+"""
+one
+}
+
+input Input {
+"""
+Description of \`one\`
+"""
+one: string
+}
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 query X($a: Int) @relay(meta: "{\\"lowPri\\": true}") {
   a
@@ -65,4 +85,32 @@ type Foo {
   one: Type
 }
 
+type Foo {
+  q("docs" field: String): Type
+  q(
+    "A long string of description of the field parameter to make this break"
+    field: String
+  ): Type
+  q(
+    """
+    docs
+    """
+    field: String
+  ): Type
+}
+
+enum Enum {
+  """
+  Description of \`one\`
+  """
+  one
+}
+
+input Input {
+  """
+  Description of \`one\`
+  """
+  one: string
+}
+
 `;

tests/graphql_string/string.graphql

@@ -26,3 +26,23 @@ of the `one` field.
 """
   one: Type
 }
+
+type Foo {
+q("docs" field: String): Type
+q("A long string of description of the field parameter to make this break" field: String): Type
+q("""docs""" field: String): Type
+}
+
+enum Enum {
+"""
+Description of `one`
+"""
+one
+}
+
+input Input {
+"""
+Description of `one`
+"""
+one: string
+}