Add parser tests for accepting non keywords, take 2

src/language/__tests__/parser.js

@@ -119,6 +119,34 @@ fragment MissingOn Type
     expect(() => parse(kitchenSink)).to.not.throw();
   });
 
+  it('allows non-keywords anywhere a Name is allowed', () => {
+    const nonKeywords = [
+      'on',
+      'fragment',
+      'query',
+      'mutation',
+      'true',
+      'false'
+    ];
+    nonKeywords.forEach((keyword) => {
+      let fragmentName = keyword;
+      // You can't define or reference a fragment named `on`.
+      if (keyword === 'on') {
+        fragmentName = 'a';
+      }
+      expect(() => {
+        parse(`query ${keyword} {
+  ... ${fragmentName}
+  ... on ${keyword} { field }
+}
+fragment ${fragmentName} on Type {
+  ${keyword}(${keyword}: $${keyword}) @${keyword}(${keyword}: ${keyword})
+}`
+        );
+      }).to.not.throw();
+    });
+  });
+
   it('parse creates ast', () => {
 
     var source = new Source(`{