1 files changed, 65 insertions, 0 deletions
diff --git a/date-fns/src/setQuarter/test.ts b/date-fns/src/setQuarter/test.ts
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+++ b/date-fns/src/setQuarter/test.ts
@@ -0,0 +1,65 @@
+// @flow
+/* eslint-env mocha */
+
+import assert from 'power-assert'
+import setQuarter from '.'
+
+describe('setQuarter', function() {
+  it('sets the quarter of the year', function() {
+    const result = setQuarter(new Date(2014, 6 /* Jul */, 2), 1)
+    assert.deepEqual(result, new Date(2014, 0 /* Jan */, 2))
+  })
+
+  it('sets the last day of the month if the original date was the last day of a longer month', function() {
+    const result = setQuarter(new Date(2014, 10 /* Nov */, 30), 1)
+    assert.deepEqual(result, new Date(2014, 1 /* Feb */, 28))
+  })
+
+  it('accepts a timestamp', function() {
+    const result = setQuarter(new Date(2014, 6 /* Jul */, 1).getTime(), 4)
+    assert.deepEqual(result, new Date(2014, 9 /* Oct */, 1))
+  })
+
+  it('converts a fractional number to an integer', function() {
+    const result = setQuarter(new Date(2014, 6 /* Jul */, 2), 1.951)
+    assert.deepEqual(result, new Date(2014, 0 /* Jan */, 2))
+  })
+
+  it('implicitly converts number arguments', function() {
+    // @ts-expect-error
+    const result = setQuarter(new Date(2014, 6 /* Jul */, 2), '1')
+    assert.deepEqual(result, new Date(2014, 0 /* Jan */, 2))
+  })
+
+  it('does not mutate the original date', function() {
+    const date = new Date(2014, 6 /* Jul */, 1)
+    setQuarter(date, 2)
+    assert.deepEqual(date, new Date(2014, 6 /* Jul */, 1))
+  })
+
+  it('handles dates before 100 AD', function() {
+    const initialDate = new Date(0)
+    initialDate.setFullYear(0, 10 /* Nov */, 30)
+    initialDate.setHours(0, 0, 0, 0)
+    const expectedResult = new Date(0)
+    expectedResult.setFullYear(0, 1 /* Feb */, 29)
+    expectedResult.setHours(0, 0, 0, 0)
+    const result = setQuarter(initialDate, 1)
+    assert.deepEqual(result, expectedResult)
+  })
+
+  it('returns `Invalid Date` if the given date is invalid', function() {
+    const result = setQuarter(new Date(NaN), 1)
+    assert(result instanceof Date && isNaN(result.getTime()))
+  })
+
+  it('returns `Invalid Date` if the given amount is NaN', function() {
+    const result = setQuarter(new Date(2014, 6 /* Jul */, 2), NaN)
+    assert(result instanceof Date && isNaN(result.getTime()))
+  })
+
+  it('throws TypeError exception if passed less than 2 arguments', function() {
+    assert.throws(setQuarter.bind(null), TypeError)
+    assert.throws(setQuarter.bind(null, 1), TypeError)
+  })
+})