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1 files changed, 47 insertions, 0 deletions

diff --git a/date-fns/src/nextTuesday/test.ts b/date-fns/src/nextTuesday/test.ts
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+++ b/date-fns/src/nextTuesday/test.ts
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+// @flow
+/* eslint-env mocha */
+
+import assert from 'power-assert'
+import nextTuesday from '.'
+
+describe('nextTuesday', function () {
+  it('returns the following Tuesday given various dates before the same', function () {
+    assert.deepStrictEqual(
+      nextTuesday(new Date(2020, 2 /* Mar */, 23)),
+      new Date(2020, 2 /* Mar */, 24)
+    )
+
+    assert.deepStrictEqual(
+      nextTuesday(new Date(2020, 2 /* Mar */, 22)),
+      new Date(2020, 2 /* Mar */, 24)
+    )
+
+    assert.deepStrictEqual(
+      nextTuesday(new Date(2020, 3 /* Apr */, 11)),
+      new Date(2020, 3 /* Apr */, 14)
+    )
+
+    assert.deepStrictEqual(
+      nextTuesday(new Date(2020, 2 /* Mar */, 20)),
+      new Date(2020, 2 /* Mar */, 24)
+    )
+
+    assert.deepStrictEqual(
+      nextTuesday(new Date(2020, 2 /* Mar */, 19)),
+      new Date(2020, 2 /* Mar */, 24)
+    )
+
+    assert.deepStrictEqual(
+      nextTuesday(new Date(2020, 2 /* Mar */, 18)),
+      new Date(2020, 2 /* Mar */, 24)
+    )
+
+    assert.deepStrictEqual(
+      nextTuesday(new Date(2020, 2 /* Mar */, 17)),
+      new Date(2020, 2 /* Mar */, 24)
+    )
+  })
+  it('returns `Invalid Date` if the given date is invalid', function () {
+    assert(nextTuesday(new Date(NaN)) instanceof Date)
+  })
+})