You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: time_test.go
    path of file: ./repos/gitkube/vendor/google.golang.org/appengine/datastore
    
    the code of the file until where you have to start completion: // Copyright 2012 Google Inc. All Rights Reserved.
// Use of this source code is governed by the Apache 2.0
// license that can be found in the LICENSE file.

package datastore

import (
	"testing"
	"time"
)

func TestUnixMicro(t *testing.T) {
	// Test that all these time.Time values survive a round trip to unix micros.
	testCases := []time.Time{
		{},
		time.Date(2, 1, 1, 0, 0, 0, 0, time.UTC),
		time.Date(23, 1, 1, 0, 0, 0, 0, time.UTC),
		time.Date(234, 1, 1, 0, 0, 0, 0, time.UTC),
		time.Date(1000, 1, 1, 0, 0, 0, 0, time.UTC),
		time.Date(1600, 1, 1, 0, 0, 0, 0, time.UTC),
		time.Date(1700, 1, 1, 0, 0, 0, 0, time.UTC),
		tim
    
func TestUnixMicro(t *testing.T) {
	// Test that all these time.Time values survive a round trip to unix micros.
	testCases := []time.Time{
		{},
		time.Date(2, 1, 1, 0, 0, 0, 0, time.UTC),
		time.Date(23, 1, 1, 0, 0, 0, 0, time.UTC),
		time.Date(234, 1, 1, 0, 0, 0, 0, time.UTC),
		time.Date(1000, 1, 1, 0, 0, 0, 0, time.UTC),
		time.Date(1600, 1, 1, 0, 0, 0, 0, time.UTC),
		time.Date(1700, 1, 1, 0, 0, 0, 0, time.UTC),
		time.Date(1800, 1, 1, 0, 0, 0, 0, time.UTC),
		time.Date(1900, 1, 1, 0, 0, 0, 0, time.UTC),
		time.Unix(-1e6, -1000),
		time.Unix(-1e6, 0),
		time.Unix(-1e6, +1000),
		time.Unix(-60, -1000),
		time.Unix(-60, 0),
		time.Unix(-60, +1000),
		time.Unix(-1, -1000),
		time.Unix(-1, 0),
		time.Unix(-1, +1000),
		time.Unix(0, -3000),
		time.Unix(0, -2000),
		time.Unix(0, -1000),
		time.Unix(0, 0),
		time.Unix(0, +1000),
		time.Unix(0, +2000),
		time.Unix(+60, -1000),
		time.Unix(+60, 0),
		time.Unix(+60, +1000),
		time.Unix(+1e6, -1000),
		time.Unix(+1e6, 0),
		time.Unix(+1e6, +1000),
		time.Date(1999, 12, 31, 23, 59, 59, 999000, time.UTC),
		time.Date(2000, 1, 1, 0, 0, 0, 0, time.UTC),
		time.Date(2006, 1, 2, 15, 4, 5, 678000, time.UTC),
		time.Date(2009, 11, 10, 23, 0, 0, 0, time.UTC),
		time.Date(3456, 1, 1, 0, 0, 0, 0, time.UTC),
	}
	for _, tc := range testCases {
		got := fromUnixMicro(toUnixMicro(tc))
		if !got.Equal(tc) {
			t.Errorf("got %q, want %q", got, tc)
		}
	}

	// Test that a time.Time that isn't an integral number of microseconds
	// is not perfectly reconstructed after a round trip.
	t0 := time.Unix(0, 123)
	t1 := fromUnixMicro(toUnixMicro(t0))
	if t1.Nanosecond()%1000 != 0 || t0.Nanosecond()%1000 == 0 {
		t.Errorf("quantization to Âµs: got %q with %d ns, started with %d ns", t1, t1.Nanosecond(), t0.Nanosecond())
	}
}