1 files changed, 64 insertions, 0 deletions
diff --git a/date-fns/src/_lib/toInteger/test.js b/date-fns/src/_lib/toInteger/test.js
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+++ b/date-fns/src/_lib/toInteger/test.js
@@ -0,0 +1,64 @@
+// @flow
+/* eslint-env mocha */
+
+import assert from 'power-assert'
+import toInteger from '.'
+
+describe('toInteger', function () {
+  it('truncates positive numbers', function () {
+    var result = toInteger(10.99)
+    assert(result === 10)
+  })
+
+  it('truncates negative numbers', function () {
+    var result = toInteger(-5.5)
+    assert(result === -5)
+  })
+
+  it('converts convertable strings', function () {
+    var result = toInteger('-10.75')
+    assert(result === -10)
+  })
+
+  it('returns NaN for non-convertable strings', function () {
+    var result = toInteger('Foobar')
+    assert(typeof result === 'number' && isNaN(result))
+  })
+
+  it('returns NaN for false', function () {
+    var result = toInteger(false)
+    assert(typeof result === 'number' && isNaN(result))
+  })
+
+  it('returns NaN for true', function () {
+    var result = toInteger(true)
+    assert(typeof result === 'number' && isNaN(result))
+  })
+
+  it('returns NaN for null', function () {
+    var result = toInteger(null)
+    assert(typeof result === 'number' && isNaN(result))
+  })
+
+  it('returns NaN for undefined', function () {
+    var result = toInteger(undefined)
+    assert(typeof result === 'number' && isNaN(result))
+  })
+
+  it('returns NaN for NaN', function () {
+    var result = toInteger(NaN)
+    assert(typeof result === 'number' && isNaN(result))
+  })
+
+  it('converts convertable objects', function () {
+    // eslint-disable-next-line no-new-wrappers
+    var result = toInteger(new Number(123))
+    assert(result === 123)
+  })
+
+  it('returns NaN for non-convertable objects', function () {
+    // eslint-disable-next-line no-new-wrappers
+    var result = toInteger({})
+    assert(typeof result === 'number' && isNaN(result))
+  })
+})