--- /dev/null
+var test = require("tape")
+
+var isString = require("../index")
+
+test("isString is a function", function (assert) {
+ assert.equal(typeof isString, "function")
+ assert.end()
+})
+
+test("string literal is truthy", function (assert) {
+ assert.equal(isString("hello"), true)
+ assert.end()
+})
+
+test("empty string is truthy", function (assert) {
+ assert.equal(isString(""), true)
+ assert.end()
+})
+
+test("string object is truthy", function (assert) {
+ assert.equal(isString(new String("hello")), true)
+ assert.end()
+})
+
+test("number is falsey", function (assert) {
+ assert.equal(isString(9), false)
+ assert.end()
+})
+
+test("boolean is falsey", function (assert) {
+ assert.equal(isString(true), false)
+ assert.end()
+})
+
+test("date is falsey", function (assert) {
+ assert.equal(isString(new Date()), false)
+ assert.end()
+})
+
+test("object is falsey", function (assert) {
+ assert.equal(isString({}), false)
+ assert.end()
+})
+test("null is falsey", function (assert) {
+ assert.equal(isString(null), false)
+ assert.end()
+})
+test("undefined is falsey", function (assert) {
+ assert.equal(isString(undefined), false)
+ assert.end()
+})