feat(node): add isPrimitive (denoland/deno#4673)

caspervonb · Jan 31, 2021 · 50b8211 · 50b8211
1 parent 32b412a
commit 50b8211
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diff --git a/node/util.ts b/node/util.ts
@@ -46,6 +46,12 @@ export function isRegExp(value: unknown): boolean {
  return value instanceof RegExp;
 }
 
+export function isPrimitive(value: unknown): boolean {
+ return (
+ value === null || (typeof value !== "object" && typeof value !== "function")
+ );
+}
+
 export function validateIntegerRange(
  value: number,
  name: string,

diff --git a/node/util_test.ts b/node/util_test.ts
@@ -124,3 +124,27 @@ test({
  assert(!util.isArray(null));
  },
 });
+
+test({
+ name: "[util] isPrimitive",
+ fn() {
+ const stringType = "hasti";
+ const booleanType = true;
+ const integerType = 2;
+ const symbolType = Symbol("anything");
+
+ const functionType = function doBest(): void {};
+ const objectType = { name: "ali" };
+ const arrayType = [1, 2, 3];
+
+ assert(util.isPrimitive(stringType));
+ assert(util.isPrimitive(booleanType));
+ assert(util.isPrimitive(integerType));
+ assert(util.isPrimitive(symbolType));
+ assert(util.isPrimitive(null));
+ assert(util.isPrimitive(undefined));
+ assert(!util.isPrimitive(functionType));
+ assert(!util.isPrimitive(arrayType));
+ assert(!util.isPrimitive(objectType));
+ },
+});