only validate Literals in accessibilityState (#112)

Author: jpdriver

__tests__/src/rules/has-valid-accessibility-state-test.js

@@ -62,6 +62,27 @@ ruleTester.run('has-valid-accessibility-state', rule, {
               <TouchableHighlight accessibilityState={{ selected: itemChecked }} />
             </>`,
     },
+    {
+      code: `const isFirst = () => {
+              return something === "example";
+            }
+
+            <TouchableOpacity
+              accessible
+              accessibilityState={{ disabled: isFirst() }}
+              disabled={isFirst()}
+            />`,
+    },
+    {
+      code: `const myObj = {
+              myBool: true
+            };
+
+            <TouchableOpacity
+              accessible
+              accessibilityState={{ checked: myObj.myBool }}
+            />`,
+    },
   ].map(parserOptionsMapper),
   invalid: [
     {

src/rules/has-valid-accessibility-state.js

@@ -42,10 +42,10 @@ module.exports = {
               // $FlowFixMe
               (f) => f.key.name === key
             );
-            // we can't determine the associated value type of an Identifier expression
+            // we can't determine the associated value type of non-Literal expressions
             // treat these cases as though they are valid
             // $FlowFixMe
-            if (astObjectProp && astObjectProp.value.type !== 'Identifier') {
+            if (astObjectProp && astObjectProp.value.type === 'Literal') {
               if (validKeys.indexOf(key) < 0) {
                 error(`accessibilityState object: "${key}" is not a valid key`);
               } else if (