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40 lines
589 B
Go
40 lines
589 B
Go
package errors
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import (
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"fmt"
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"testing"
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F "github.com/ibm/fp-go/function"
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O "github.com/ibm/fp-go/option"
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"github.com/stretchr/testify/assert"
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)
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type MyError struct{}
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func (m *MyError) Error() string {
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return "boom"
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}
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func TestAs(t *testing.T) {
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root := &MyError{}
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err := fmt.Errorf("This is my custom error, %w", root)
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errO := F.Pipe1(
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err,
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As[*MyError](),
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)
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assert.Equal(t, O.Of(root), errO)
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}
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func TestNotAs(t *testing.T) {
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err := fmt.Errorf("This is my custom error")
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errO := F.Pipe1(
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err,
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As[*MyError](),
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)
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assert.Equal(t, O.None[*MyError](), errO)
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}
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