1 files changed, 93 insertions, 0 deletions
diff --git a/date-fns/src/min/test.ts b/date-fns/src/min/test.ts
new file mode 100644
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+++ b/date-fns/src/min/test.ts
@@ -0,0 +1,93 @@
+// @flow
+/* eslint-env mocha */
+
+import assert from 'assert'
+import min from '.'
+
+describe('min', () => {
+  const isInvalidDate = (dirtyDate: Date): boolean => {
+    return dirtyDate instanceof Date && isNaN(dirtyDate.getDate())
+  }
+
+  it('returns the earliest date', () => {
+    const result = min([
+      new Date(1989, 6 /* Jul */, 10),
+      new Date(1987, 1 /* Feb */, 11),
+    ])
+    assert.deepStrictEqual(result, new Date(1987, 1 /* Feb */, 11))
+  })
+
+  it('accepts array with more than 2 entries', () => {
+    const result = min([
+      new Date(1987, 1 /* Feb */, 11),
+      new Date(1989, 6 /* Jul */, 10),
+      new Date(1985, 6 /* Jul */, 2),
+      new Date(1990, 0 /* Jan */, 1),
+    ])
+    assert.deepStrictEqual(result, new Date(1985, 6 /* Jul */, 2))
+  })
+
+  it('accepts timestamps', () => {
+    const result = min([
+      new Date(1989, 6 /* Jul */, 10).getTime(),
+      new Date(1987, 1 /* Feb */, 11).getTime(),
+    ])
+    assert.deepStrictEqual(result, new Date(1987, 1 /* Feb */, 11))
+  })
+
+  it('returns `Invalid Date` if any given date is invalid', () => {
+    const result = min([
+      new Date(1989, 6 /* Jul */, 10),
+      new Date(NaN),
+      new Date(1987, 1 /* Feb */, 11),
+    ])
+    assert(isInvalidDate(result))
+  })
+
+  it('returns `Invalid Date` if any given value is undefined', () => {
+    const result = min([
+      new Date(1989, 6 /* Jul */, 10),
+      // @ts-expect-error
+      undefined,
+      new Date(1987, 1 /* Feb */, 11),
+    ])
+    assert(isInvalidDate(result))
+  })
+
+  it('returns `Invalid Date` for empty array', () => {
+    const result = min([])
+    assert(isInvalidDate(result))
+  })
+
+  it('converts Array-like objects into Array', () => {
+    // @ts-expect-error
+    const result = min({
+      '0': new Date(1989, 6 /* Jul */, 10),
+      '1': new Date(1987, 1 /* Feb */, 11),
+      length: 2,
+    })
+    assert.deepStrictEqual(result, new Date(1987, 1 /* Feb */, 11))
+  })
+
+  it('converts iterable objects into Array', () => {
+    const result = min(
+      // @ts-expect-error
+      new Set([
+        new Date(1989, 6 /* Jul */, 10),
+        new Date(1987, 1 /* Feb */, 11),
+      ])
+    )
+    assert.deepStrictEqual(result, new Date(1987, 1 /* Feb */, 11))
+  })
+
+  it('returns `Invalid Date` if given a non-iterable value', () => {
+    // @ts-expect-error
+    const result = min(undefined)
+    assert(isInvalidDate(result))
+  })
+
+  it('throws TypeError exception if passed less than 1 argument', () => {
+    // @ts-expect-error
+    assert.throws(min.bind(null), TypeError)
+  })
+})