1 files changed, 39 insertions, 0 deletions
diff --git a/date-fns/src/isThisHour/test.ts b/date-fns/src/isThisHour/test.ts
new file mode 100644
index 0000000..ec82710
--- /dev/null
+++ b/date-fns/src/isThisHour/test.ts
@@ -0,0 +1,39 @@
+// @flow
+/* eslint-env mocha */
+
+import assert from 'assert'
+import sinon from 'sinon'
+import isThisHour from '.'
+
+describe('isThisHour', () => {
+  let clock: sinon.SinonFakeTimers
+  beforeEach(() => {
+    clock = sinon.useFakeTimers(
+      new Date(2014, 8 /* Sep */, 25, 18, 30, 15, 500).getTime()
+    )
+  })
+
+  afterEach(() => {
+    clock.restore()
+  })
+
+  it('returns true if the given date and the current date have the same hour', () => {
+    const date = new Date(2014, 8 /* Sep */, 25, 18)
+    assert(isThisHour(date) === true)
+  })
+
+  it('returns false if the given date and the current date have different hours', () => {
+    const date = new Date(2014, 8 /* Sep */, 25, 19)
+    assert(isThisHour(date) === false)
+  })
+
+  it('accepts a timestamp', () => {
+    const date = new Date(2014, 8 /* Sep */, 25, 18, 45).getTime()
+    assert(isThisHour(date) === true)
+  })
+
+  it('throws TypeError exception if passed less than 1 argument', () => {
+    // @ts-expect-error
+    assert.throws(isThisHour.bind(null), TypeError)
+  })
+})