forked from TrueCloudLab/neoneo-go
68 lines
1.7 KiB
Go
68 lines
1.7 KiB
Go
package stack
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import (
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"math/big"
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"testing"
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"github.com/stretchr/testify/assert"
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)
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// A simple test to ensure that by embedding the abstract interface
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// we immediately become a stack item, with the default values set to nil
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func TestInterfaceEmbedding(t *testing.T) {
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// Create an anonymous struct that embeds the abstractItem
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a := struct {
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*abstractItem
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}{
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&abstractItem{},
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}
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// Since interface checking can be done at compile time.
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// If he abstractItem did not implement all methods of our interface `Item`
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// Then any struct which embeds it, will also not implement the Item interface.
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// This test would then give errors, at compile time.
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var Items []Item
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Items = append(Items, a)
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// Default methods should give errors
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// Here we just need to test against one of the methods in the interface
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for _, element := range Items {
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x, err := element.Integer()
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assert.Nil(t, x)
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assert.NotNil(t, err, nil)
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}
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}
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// TestIntCasting is a simple test to test that the Integer method is overwritten
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// from the abstractItem
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func TestIntMethodOverride(t *testing.T) {
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testValues := []int64{0, 10, 200, 30, 90}
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var Items []Item
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// Convert a range of int64s into Stack Integers
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// Adding them into an array of StackItems
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for _, num := range testValues {
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stackInteger, err := NewInt(big.NewInt(num))
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if err != nil {
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t.Fail()
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}
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Items = append(Items, stackInteger)
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}
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// For each item, call the Integer method on the interface
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// Which should return an integer and no error
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// as the stack integer struct overrides that method
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for i, element := range Items {
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k, err := element.Integer()
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if err != nil {
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t.Fail()
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}
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if k.val.Cmp(big.NewInt(testValues[i])) != 0 {
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t.Fail()
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}
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}
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}
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