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diff --git a/date-fns/src/eachMinuteOfInterval/test.ts b/date-fns/src/eachMinuteOfInterval/test.ts
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+// @flow
+/* eslint-env mocha */
+
+import assert from 'power-assert'
+
+import eachMinuteOfInterval from '.'
+
+describe('eachMinuteOfInterval', () => {
+  it('should return an array of Date objects containing a Date for each minute between the interval', () => {
+    const result = eachMinuteOfInterval({
+      start: new Date(2020, 10, 14, 13, 0),
+      end: new Date(2020, 10, 14, 13, 5)
+    })
+
+    assert.deepEqual(result, [
+      new Date(2020, 10, 14, 13, 0),
+      new Date(2020, 10, 14, 13, 1),
+      new Date(2020, 10, 14, 13, 2),
+      new Date(2020, 10, 14, 13, 3),
+      new Date(2020, 10, 14, 13, 4),
+      new Date(2020, 10, 14, 13, 5)
+    ])
+  })
+
+  it('should handle all the minutes that are not in the begining', () => {
+    const result = eachMinuteOfInterval({
+      start: new Date(2020, 10, 14, 13, 0, 33),
+      end: new Date(2020, 10, 14, 13, 2)
+    })
+
+    assert.deepEqual(result[0], new Date(2020, 10, 14, 13))
+    assert.deepEqual(result[2], new Date(2020, 10, 14, 13, 2))
+  })
+
+  it('should accept timestamps', () => {
+    const start = new Date(2020, 10, 14, 13, 0).getTime()
+    const end = new Date(2020, 10, 14, 13, 2).getTime()
+
+    const result = eachMinuteOfInterval({
+      start,
+      end
+    })
+
+    assert.deepEqual(result, [
+      new Date(2020, 10, 14, 13, 0),
+      new Date(2020, 10, 14, 13, 1),
+      new Date(2020, 10, 14, 13, 2)
+    ])
+  })
+
+  it('throws an exception if the start date is after the end date', () => {
+    const block = eachMinuteOfInterval.bind(null, {
+      start: new Date(2014, 10, 14, 10),
+      end: new Date(2014, 10, 14, 5)
+    })
+    assert.throws(block, RangeError)
+  })
+
+  describe('options.step', () => {
+    const interval = {
+      start: new Date(2020, 9, 14, 13, 1),
+      end: new Date(2020, 9, 14, 13, 7)
+    }
+
+    const stepError = /^RangeError: `options.step` must be a number equal or greater than 1$/
+
+    it('returns an array with starts of hours from the hour of the start date to the hour of the end date with the given step', () => {
+      const result = eachMinuteOfInterval(interval, { step: 3 })
+      assert.deepEqual(result, [
+        new Date(2020, 9, 14, 13, 1),
+        new Date(2020, 9, 14, 13, 4),
+        new Date(2020, 9, 14, 13, 7)
+      ])
+    })
+
+    it('throws TypeError error if `options.step` is less than 1', () => {
+      assert.throws(
+        () => eachMinuteOfInterval(interval, { step: 0 }),
+        stepError
+      )
+      assert.throws(
+        () => eachMinuteOfInterval(interval, { step: -3 }),
+        stepError
+      )
+    })
+
+    it('throws TypeError error if `options.step` is NaN', () => {
+      // $ExpectedMistake
+      assert.throws(
+        () => eachMinuteOfInterval(interval, { step: 'w' }),
+        stepError
+      )
+      assert.throws(
+        () => eachMinuteOfInterval(interval, { step: NaN }),
+        stepError
+      )
+    })
+  })
+})