func TestDocumentGetNumberReturnsAnEmptyNumberWhenTheKeyIsNotPresent(t *testing.T) {
doc := dynago.Document{}
assert.Equal(t, dynago.Number(""), doc.GetNumber("id"))
}
func TestDocumentGetNumberPanicsIfTheUnderlyingTypeIsNotANumber(t *testing.T) {
doc := dynago.Document{"id": "not-a-dynago-number"}
assert.Panics(t, func() {
doc.GetNumber("id")
})
}
func TestDocumentGetNumberReturnsTheDynagoNumberWrappingTheValue(t *testing.T) {
doc := dynago.Document{"id": dynago.Number("12")}
assert.Equal(t, dynago.Number("12"), doc.GetNumber("id"))
}