Add alias and null value (#2017)

Add kitchen sink test case

src/printer-graphql.js

@@ -74,6 +74,7 @@ function genericPrint(path, options, print) {
     case "Field": {
       return group(
         concat([
+          n.alias ? concat([path.call(print, "alias"), ": "]) : "",
           path.call(print, "name"),
           n.arguments.length > 0
             ? group(
@@ -113,6 +114,9 @@ function genericPrint(path, options, print) {
     case "BooleanValue": {
       return n.value ? "true" : "false";
     }
+    case "NullValue": {
+      return "null";
+    }
     case "Variable": {
       return concat(["$", path.call(print, "name")]);
     }

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

@@ -0,0 +1,113 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`kitchen_sink.graphql 1`] = `
+query queryName($foo: ComplexType, $site: Site = MOBILE) {
+  whoever123is: node(id: [123, 456]) {
+    id ,
+    ... on User @defer {
+      field2 {
+        id ,
+        alias: field1(first:10, after:$foo,) @include(if: $foo) {
+          id,
+          ...frag
+        }
+      }
+    }
+    ... @skip(unless: $foo) {
+      id
+    }
+    ... {
+      id
+    }
+  }
+}
+
+mutation likeStory {
+  like(story: 123) @defer {
+    story {
+      id
+    }
+  }
+}
+
+subscription StoryLikeSubscription($input: StoryLikeSubscribeInput) {
+  storyLikeSubscribe(input: $input) {
+    story {
+      likers {
+        count
+      }
+      likeSentence {
+        text
+      }
+    }
+  }
+}
+
+fragment frag on Friend {
+  foo(size: $size, bar: $b, obj: {key: "value"})
+}
+
+{
+  unnamed(truthy: true, falsey: false, nullish: null),
+  query
+}
+
+query {
+  field
+}
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+query queryName($foo: ComplexType, $site: Site = MOBILE) {
+  whoever123is: node(id: [123, 456]) {
+    id
+    ... on User @defer {
+      field2 {
+        id
+        alias: field1(first: 10, after: $foo) @include(if: $foo) {
+          id
+          ...frag
+        }
+      }
+    }
+    ... @skip(unless: $foo) {
+      id
+    }
+    ... {
+      id
+    }
+  }
+}
+
+mutation likeStory {
+  like(story: 123) @defer {
+    story {
+      id
+    }
+  }
+}
+
+subscription StoryLikeSubscription($input: StoryLikeSubscribeInput) {
+  storyLikeSubscribe(input: $input) {
+    story {
+      likers {
+        count
+      }
+      likeSentence {
+        text
+      }
+    }
+  }
+}
+
+fragment frag on Friend {
+  foo(size: $size, bar: $b, obj: { key: "value" })
+}
+
+{
+  unnamed(truthy: true, falsey: false, nullish: null)
+  query
+}
+
+query {
+  field
+}
+`;

tests/graphql_kitchen_sink/jsfmt.spec.js

@@ -0,0 +1 @@
+run_spec(__dirname, { parser: "graphql" });

tests/graphql_kitchen_sink/kitchen_sink.graphql

@@ -0,0 +1,54 @@
+query queryName($foo: ComplexType, $site: Site = MOBILE) {
+  whoever123is: node(id: [123, 456]) {
+    id ,
+    ... on User @defer {
+      field2 {
+        id ,
+        alias: field1(first:10, after:$foo,) @include(if: $foo) {
+          id,
+          ...frag
+        }
+      }
+    }
+    ... @skip(unless: $foo) {
+      id
+    }
+    ... {
+      id
+    }
+  }
+}
+
+mutation likeStory {
+  like(story: 123) @defer {
+    story {
+      id
+    }
+  }
+}
+
+subscription StoryLikeSubscription($input: StoryLikeSubscribeInput) {
+  storyLikeSubscribe(input: $input) {
+    story {
+      likers {
+        count
+      }
+      likeSentence {
+        text
+      }
+    }
+  }
+}
+
+fragment frag on Friend {
+  foo(size: $size, bar: $b, obj: {key: "value"})
+}
+
+{
+  unnamed(truthy: true, falsey: false, nullish: null),
+  query
+}
+
+query {
+  field
+}