func TestDocumentGetTimeReturnsNilWhenTheKeyDoesNotExist(t *testing.T) {
doc := dynago.Document{}
assert.Nil(t, doc.GetTime("time"))
}
func TestDocumentGetTimePanicsWhenFormatIsNotIso8601(t *testing.T) {
doc := dynago.Document{"time": "Foo"}
assert.Panics(t, func() { doc.GetTime("time") })
}
func TestDocumentGetTimeReturnsTheTimeValueFromISO8601(t *testing.T) {
doc := dynago.Document{"time": "1990-04-16T00:00:00Z"}
val, _ := time.Parse("2006-01-02T15:04:05Z", "1990-04-16T00:00:00Z")
assert.Equal(t, &val, doc.GetTime("time"))
}