1 files changed, 31 insertions, 0 deletions
diff --git a/date-fns/src/isWeekend/test.ts b/date-fns/src/isWeekend/test.ts
new file mode 100644
index 0000000..750ecaa
--- /dev/null
+++ b/date-fns/src/isWeekend/test.ts
@@ -0,0 +1,31 @@
+// @flow
+/* eslint-env mocha */
+
+import assert from 'power-assert'
+import isWeekend from '.'
+
+describe('isWeekend', function () {
+  it('returns true if the given date is in a weekend', function () {
+    const result = isWeekend(new Date(2014, 9 /* Oct */, 5))
+    assert(result === true)
+  })
+
+  it('returns false if the given date is not in a weekend', function () {
+    const result = isWeekend(new Date(2014, 9 /* Oct */, 6))
+    assert(result === false)
+  })
+
+  it('accepts a timestamp', function () {
+    const result = isWeekend(new Date(2014, 9 /* Oct */, 5).getTime())
+    assert(result === true)
+  })
+
+  it('returns false if the given date is `Invalid Date`', function () {
+    const result = isWeekend(new Date(NaN))
+    assert(result === false)
+  })
+
+  it('throws TypeError exception if passed less than 1 argument', function () {
+    assert.throws(isWeekend.bind(null), TypeError)
+  })
+})