5 files changed, 233 insertions, 0 deletions
diff --git a/date-fns/src/differenceInMinutes/benchmark.js b/date-fns/src/differenceInMinutes/benchmark.js
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+++ b/date-fns/src/differenceInMinutes/benchmark.js
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+// @flow
+/* eslint-env mocha */
+/* global suite, benchmark */
+
+import differenceInMinutes from '.'
+import moment from 'moment'
+
+suite('differenceInMinutes', function () {
+  benchmark('date-fns', function () {
+    return differenceInMinutes(this.dateA, this.dateB)
+  })
+
+  benchmark('Moment.js', function () {
+    return this.momentA.diff(this.momentB, 'minute')
+  })
+}, {
+  setup: function () {
+    this.dateA = new Date()
+    this.momentA = moment()
+    this.dateB = new Date(this.dateA.getTime() + 604800000)
+    this.momentB = this.momentA.clone().add(7, 'days')
+  }
+})
diff --git a/date-fns/src/differenceInMinutes/index.d.ts b/date-fns/src/differenceInMinutes/index.d.ts
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index 0000000..28348fc
--- /dev/null
+++ b/date-fns/src/differenceInMinutes/index.d.ts
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+// This file is generated automatically by `scripts/build/typings.js`. Please, don't change it.
+
+import { differenceInMinutes } from 'date-fns'
+export default differenceInMinutes
diff --git a/date-fns/src/differenceInMinutes/index.js b/date-fns/src/differenceInMinutes/index.js
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+++ b/date-fns/src/differenceInMinutes/index.js
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+import differenceInMilliseconds from '../differenceInMilliseconds/index'
+import requiredArgs from '../_lib/requiredArgs/index'
+
+var MILLISECONDS_IN_MINUTE = 60000
+
+/**
+ * @name differenceInMinutes
+ * @category Minute Helpers
+ * @summary Get the number of minutes between the given dates.
+ *
+ * @description
+ * Get the signed number of full (rounded towards 0) minutes between the given dates.
+ *
+ * ### v2.0.0 breaking changes:
+ *
+ * - [Changes that are common for the whole library](https://github.com/date-fns/date-fns/blob/master/docs/upgradeGuide.md#Common-Changes).
+ *
+ * @param {Date|Number} dateLeft - the later date
+ * @param {Date|Number} dateRight - the earlier date
+ * @returns {Number} the number of minutes
+ * @throws {TypeError} 2 arguments required
+ *
+ * @example
+ * // How many minutes are between 2 July 2014 12:07:59 and 2 July 2014 12:20:00?
+ * var result = differenceInMinutes(
+ *   new Date(2014, 6, 2, 12, 20, 0),
+ *   new Date(2014, 6, 2, 12, 7, 59)
+ * )
+ * //=> 12
+ *
+ * @example
+ * // How many minutes are from 10:01:59 to 10:00:00
+ * var result = differenceInMinutes(
+ *   new Date(2000, 0, 1, 10, 0, 0),
+ *   new Date(2000, 0, 1, 10, 1, 59)
+ * )
+ * //=> -1
+ */
+export default function differenceInMinutes(dirtyDateLeft, dirtyDateRight) {
+  requiredArgs(2, arguments)
+
+  var diff =
+    differenceInMilliseconds(dirtyDateLeft, dirtyDateRight) /
+    MILLISECONDS_IN_MINUTE
+  return diff > 0 ? Math.floor(diff) : Math.ceil(diff)
+}
diff --git a/date-fns/src/differenceInMinutes/index.js.flow b/date-fns/src/differenceInMinutes/index.js.flow
new file mode 100644
index 0000000..c799819
--- /dev/null
+++ b/date-fns/src/differenceInMinutes/index.js.flow
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+// @flow
+// This file is generated automatically by `scripts/build/typings.js`. Please, don't change it.
+
+export type Interval = {
+  start: Date | number,
+  end: Date | number,
+}
+
+export type Locale = {
+  code?: string,
+  formatDistance?: (...args: Array<any>) => any,
+  formatRelative?: (...args: Array<any>) => any,
+  localize?: {
+    ordinalNumber: (...args: Array<any>) => any,
+    era: (...args: Array<any>) => any,
+    quarter: (...args: Array<any>) => any,
+    month: (...args: Array<any>) => any,
+    day: (...args: Array<any>) => any,
+    dayPeriod: (...args: Array<any>) => any,
+  },
+  formatLong?: {
+    date: (...args: Array<any>) => any,
+    time: (...args: Array<any>) => any,
+    dateTime: (...args: Array<any>) => any,
+  },
+  match?: {
+    ordinalNumber: (...args: Array<any>) => any,
+    era: (...args: Array<any>) => any,
+    quarter: (...args: Array<any>) => any,
+    month: (...args: Array<any>) => any,
+    day: (...args: Array<any>) => any,
+    dayPeriod: (...args: Array<any>) => any,
+  },
+  options?: {
+    weekStartsOn?: 0 | 1 | 2 | 3 | 4 | 5 | 6,
+    firstWeekContainsDate?: 1 | 2 | 3 | 4 | 5 | 6 | 7,
+  },
+}
+
+export type Duration = {
+  years?: number,
+  months?: number,
+  weeks?: number,
+  days?: number,
+  hours?: number,
+  minutes?: number,
+  seconds?: number,
+}
+
+export type Day = 0 | 1 | 2 | 3 | 4 | 5 | 6
+
+declare module.exports: (
+  dateLeft: Date | number,
+  dateRight: Date | number
+) => number
diff --git a/date-fns/src/differenceInMinutes/test.js b/date-fns/src/differenceInMinutes/test.js
new file mode 100644
index 0000000..ff6a6c3
--- /dev/null
+++ b/date-fns/src/differenceInMinutes/test.js
@@ -0,0 +1,105 @@
+// @flow
+/* eslint-env mocha */
+
+import assert from 'power-assert'
+import differenceInMinutes from '.'
+
+describe('differenceInMinutes', function() {
+  it('returns the number of minutes between the given dates', function() {
+    var result = differenceInMinutes(
+      new Date(2014, 6 /* Jul */, 2, 12, 20),
+      new Date(2014, 6 /* Jul */, 2, 12, 6)
+    )
+    assert(result === 14)
+  })
+
+  it('returns a negative number if the time value of the first date is smaller', function() {
+    var result = differenceInMinutes(
+      new Date(2014, 6 /* Jul */, 2, 12, 6),
+      new Date(2014, 6 /* Jul */, 2, 12, 20)
+    )
+    assert(result === -14)
+  })
+
+  it('accepts timestamps', function() {
+    var result = differenceInMinutes(
+      new Date(2014, 8 /* Sep */, 5, 18, 45).getTime(),
+      new Date(2014, 8 /* Sep */, 5, 18, 15).getTime()
+    )
+    assert(result === 30)
+  })
+
+  describe('edge cases', function() {
+    it('the difference is less than a minute, but the given dates are in different calendar minutes', function() {
+      var result = differenceInMinutes(
+        new Date(2014, 8 /* Sep */, 5, 12, 12),
+        new Date(2014, 8 /* Sep */, 5, 12, 11, 59)
+      )
+      assert(result === 0)
+    })
+
+    it('the same for the swapped dates', function() {
+      var result = differenceInMinutes(
+        new Date(2014, 8 /* Sep */, 5, 12, 11, 59),
+        new Date(2014, 8 /* Sep */, 5, 12, 12)
+      )
+      assert(result === 0)
+    })
+
+    it('the difference is an integral number of minutes', function() {
+      var result = differenceInMinutes(
+        new Date(2014, 8 /* Sep */, 5, 12, 25),
+        new Date(2014, 8 /* Sep */, 5, 12, 15)
+      )
+      assert(result === 10)
+    })
+
+    it('the given dates are the same', function() {
+      var result = differenceInMinutes(
+        new Date(2014, 8 /* Sep */, 5, 0, 0),
+        new Date(2014, 8 /* Sep */, 5, 0, 0)
+      )
+      assert(result === 0)
+    })
+
+    it('does not return -0 when the given dates are the same', () => {
+      function isNegativeZero(x) {
+        return x === 0 && 1 / x < 0
+      }
+
+      var result = differenceInMinutes(
+        new Date(2014, 8 /* Sep */, 5, 0, 0),
+        new Date(2014, 8 /* Sep */, 5, 0, 0)
+      )
+
+      var resultIsNegative = isNegativeZero(result)
+      assert(resultIsNegative === false)
+    })
+  })
+
+  it('returns NaN if the first date is `Invalid Date`', function() {
+    var result = differenceInMinutes(
+      new Date(NaN),
+      new Date(2017, 0 /* Jan */, 1)
+    )
+    assert(isNaN(result))
+  })
+
+  it('returns NaN if the second date is `Invalid Date`', function() {
+    var result = differenceInMinutes(
+      new Date(2017, 0 /* Jan */, 1),
+      new Date(NaN)
+    )
+    assert(isNaN(result))
+  })
+
+  it('returns NaN if the both dates are `Invalid Date`', function() {
+    var result = differenceInMinutes(new Date(NaN), new Date(NaN))
+    assert(isNaN(result))
+  })
+
+  it('throws TypeError exception if passed less than 2 arguments', function() {
+    assert.throws(differenceInMinutes.bind(null), TypeError)
+    assert.throws(differenceInMinutes.bind(null, 1), TypeError)
+  })
+})