1 files changed, 51 insertions, 0 deletions
diff --git a/date-fns/src/isEqual/test.ts b/date-fns/src/isEqual/test.ts
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+++ b/date-fns/src/isEqual/test.ts
@@ -0,0 +1,51 @@
+// @flow
+/* eslint-env mocha */
+
+import assert from 'power-assert'
+import isEqual from '.'
+
+describe('isEqual', function() {
+  it('returns true if the given dates are equal', function() {
+    const result = isEqual(
+      new Date(1987, 1 /* Feb */, 11),
+      new Date(1987, 1 /* Feb */, 11)
+    )
+    assert(result === true)
+  })
+
+  it('returns false if the given dates are not equal', function() {
+    const result = isEqual(
+      new Date(1989, 6 /* Jul */, 10),
+      new Date(1987, 1 /* Feb */, 11)
+    )
+    assert(result === false)
+  })
+
+  it('accepts a timestamp', function() {
+    const result = isEqual(
+      new Date(1987, 1 /* Feb */, 11).getTime(),
+      new Date(1987, 1 /* Feb */, 11).getTime()
+    )
+    assert(result === true)
+  })
+
+  it('returns false if the first date is `Invalid Date`', function() {
+    const result = isEqual(new Date(NaN), new Date(1989, 6 /* Jul */, 10))
+    assert(result === false)
+  })
+
+  it('returns false if the second date is `Invalid Date`', function() {
+    const result = isEqual(new Date(1987, 1 /* Feb */, 11), new Date(NaN))
+    assert(result === false)
+  })
+
+  it('returns false if the both dates are `Invalid Date`', function() {
+    const result = isEqual(new Date(NaN), new Date(NaN))
+    assert(result === false)
+  })
+
+  it('throws TypeError exception if passed less than 2 arguments', function() {
+    assert.throws(isEqual.bind(null), TypeError)
+    assert.throws(isEqual.bind(null, 1), TypeError)
+  })
+})