Make nonEmpty easier to use

package.json

@@ -1,6 +1,6 @@
 {
   "name": "idonttrustlikethat",
-  "version": "2.0.1",
+  "version": "2.0.2",
   "sideEffects": false,
   "description": "Validation for TypeScript",
   "license": "MIT",

src/validation.ts

@@ -650,7 +650,9 @@ type HasSize =
   | Map<unknown, unknown>
   | Set<unknown>
 
-export function minSize<T extends HasSize>(minSize: number) {
+export function minSize<T extends HasSize>(
+  minSize: number
+): (value: T) => Result<string, T> {
   return (value: T) => {
     const size =
       typeof value === 'string'
@@ -667,4 +669,7 @@ export function minSize<T extends HasSize>(minSize: number) {
   }
 }
 
-export const nonEmpty = <T extends HasSize>() => minSize<T>(1)
+// Note: this a fully fledged function so that inference on T will work.
+export function nonEmpty<T extends HasSize>(value: T): Result<string, T> {
+  return minSize<T>(1)(value)
+}

test/test.ts

@@ -840,24 +840,26 @@ describe('validation core', () => {
     printErrorMessage(notOkValidation3)
   })
 
-  it('returns the correct type for nonEmpty', () => {
+  it('can validate that a container is not empty', () => {
     const array = [1, 2, 3]
     type ArrayType = typeof array
-    const okValidation = v.array(v.number).and(nonEmpty()).validate(array)
+    const okValidation = v.array(v.number).and(nonEmpty).validate(array)
+
     const obj = { a: 'a' }
     type ObjType = typeof obj
-    const okValidation2 = v
-      .object({ a: v.string })
-      .and(nonEmpty())
-      .validate(obj)
+    const okValidation2 = v.object({ a: v.string }).and(nonEmpty).validate(obj)
+
+    const notOkValidation = v.object({ a: v.string }).and(nonEmpty).validate({})
 
     if (okValidation.ok && okValidation2.ok) {
-      // Check assignation/type
+      // Type assertion.
       const _arrayType: ArrayType = okValidation.value
       const _objType: ObjType = okValidation2.value
     } else {
       throw new Error()
     }
+
+    expect(notOkValidation.ok).toBe(false)
   })
 })