Add missing valid tests using exact Flow objects

Author: jomasti

tests/lib/rules/prefer-exact-props.js

@@ -67,6 +67,23 @@ ruleTester.run('prefer-exact-props', rule, {
       }
     `,
     parser: 'babel-eslint'
+  }, {
+    code: `
+      type Props = {|
+        foo: string
+      |}
+      function Component(props: Props) {
+        return <div />;
+      }
+    `,
+    parser: 'babel-eslint'
+  }, {
+    code: `
+      function Component(props: {| foo : string |}) {
+        return <div />;
+      }
+    `,
+    parser: 'babel-eslint'
   }, {
     code: `
       type Props = {}