test: add general test cases

tests/array.spec.ts

@@ -12,7 +12,7 @@ import {
   shuffle,
   sum,
   sumBy,
-} from '../src'
+} from '../src/array'
 
 it('uniq', () => {
   const arr = uniq([1, 2, 2, 3, 4, 4])

tests/general.spec.ts

@@ -1,7 +1,53 @@
 import { it, expect } from 'vitest'
-import { isNonEmptyArray } from '../src'
+import { isNonEmptyArray, isString, isBoolean, isNumber, toTypeString } from '../src/general'
 
 it('isNonEmptyArray', () => {
   expect(isNonEmptyArray([])).toBe(false)
+
   expect(isNonEmptyArray([1, 2])).toBe(true)
 })
+
+it('toTypeString', () => {
+  expect(toTypeString([])).toBe('[object Array]')
+  expect(toTypeString({})).toBe('[object Object]')
+  expect(toTypeString(1)).toBe('[object Number]')
+  expect(toTypeString('')).toBe('[object String]')
+  expect(toTypeString(false)).toBe('[object Boolean]')
+  expect(toTypeString(null)).toBe('[object Null]')
+  expect(toTypeString(undefined)).toBe('[object Undefined]')
+})
+
+it('isString', () => {
+  expect(isString([])).toBe(false)
+  expect(isString(false)).toBe(false)
+  expect(isString(1)).toBe(false)
+  expect(isString(null)).toBe(false)
+  expect(isString(undefined)).toBe(false)
+  expect(isString({})).toBe(false)
+
+  expect(isString('')).toBe(true)
+})
+
+it('isBoolean', () => {
+  expect(isBoolean([])).toBe(false)
+  expect(isBoolean(1)).toBe(false)
+  expect(isBoolean(null)).toBe(false)
+  expect(isBoolean(undefined)).toBe(false)
+  expect(isBoolean({})).toBe(false)
+  expect(isBoolean('')).toBe(false)
+
+  expect(isBoolean(false)).toBe(true)
+  expect(isBoolean(true)).toBe(true)
+})
+
+it('isNumber', () => {
+  expect(isNumber([])).toBe(false)
+  expect(isNumber(false)).toBe(false)
+  expect(isNumber(null)).toBe(false)
+  expect(isNumber(undefined)).toBe(false)
+  expect(isNumber({})).toBe(false)
+  expect(isNumber('')).toBe(false)
+
+  expect(isNumber(1)).toBe(true)
+  expect(isNumber(NaN)).toBe(true)
+})