1 files changed, 48 insertions, 0 deletions
diff --git a/date-fns/src/nextFriday/test.ts b/date-fns/src/nextFriday/test.ts
new file mode 100644
index 0000000..ee9ece0
--- /dev/null
+++ b/date-fns/src/nextFriday/test.ts
@@ -0,0 +1,48 @@
+// @flow
+/* eslint-env mocha */
+
+import assert from 'power-assert'
+import nextFriday from '.'
+
+describe('nextFriday', () => {
+  it('returns the following Friday given various dates before the same', () => {
+    assert.deepStrictEqual(
+      nextFriday(new Date(2020, 2 /* Mar */, 23)),
+      new Date(2020, 2 /* Mar */, 27)
+    )
+
+    assert.deepStrictEqual(
+      nextFriday(new Date(2020, 2 /* Mar */, 22)),
+      new Date(2020, 2 /* Mar */, 27)
+    )
+
+    assert.deepStrictEqual(
+      nextFriday(new Date(2020, 2 /* Mar */, 21)),
+      new Date(2020, 2 /* Mar */, 27)
+    )
+
+    assert.deepStrictEqual(
+      nextFriday(new Date(2020, 2 /* Mar */, 20)),
+      new Date(2020, 2 /* Mar */, 27)
+    )
+
+    assert.deepStrictEqual(
+      nextFriday(new Date(2020, 2 /* Mar */, 19)),
+      new Date(2020, 2 /* Mar */, 20)
+    )
+
+    assert.deepStrictEqual(
+      nextFriday(new Date(2020, 2 /* Mar */, 18)),
+      new Date(2020, 2 /* Mar */, 20)
+    )
+
+    assert.deepStrictEqual(
+      nextFriday(new Date(2020, 2 /* Mar */, 17)),
+      new Date(2020, 2 /* Mar */, 20)
+    )
+  })
+
+  it('returns `Invalid Date` if the given date is invalid', () => {
+    assert(nextFriday(new Date(NaN)) instanceof Date)
+  })
+})