feat: add $objectKeys expression

orioro · Feb 23, 2021 · e8930cf · e8930cf
1 parent 55e873e
commit e8930cf
Show file tree

Hide file tree

Showing 3 changed files with 30 additions and 0 deletions.
diff --git a/src/__snapshots__/index.spec.ts.snap b/src/__snapshots__/index.spec.ts.snap
@@ -106,6 +106,7 @@ Array [
   "$objectFormat",
   "$objectDefaults",
   "$objectAssign",
+  "$objectKeys",
   "OBJECT_EXPRESSIONS",
   "$string",
   "$stringStartsWith",

diff --git a/src/expressions/object.spec.ts b/src/expressions/object.spec.ts
@@ -359,3 +359,21 @@ describe('$objectAssign', () => {
     })
   })
 })
+
+test('$objectKeys', () => {
+  expect(
+    evaluate(
+      {
+        interpreters,
+        scope: {
+          $$VALUE: {
+            key1: 'value1',
+            key2: 'value2',
+            key3: 'value3',
+          },
+        },
+      },
+      ['$objectKeys']
+    )
+  ).toEqual(['key1', 'key2', 'key3'])
+})
diff --git a/src/expressions/object.ts b/src/expressions/object.ts
@@ -136,9 +136,20 @@ export const $objectAssign = interpreter(
   ['object', 'object']
 )
 
+/**
+ * @function $objectKeys
+ * @param {Object} object
+ * @returns {String[]}
+ */
+export const $objectKeys = interpreter(
+  (obj: PlainObject): string[] => Object.keys(obj),
+  ['object']
+)
+
 export const OBJECT_EXPRESSIONS = {
   $objectMatches,
   $objectFormat,
   $objectDefaults,
   $objectAssign,
+  $objectKeys,
 }