package errors import ( "errors" "testing" "github.com/stretchr/testify/assert" ) func TestErrorHeight(t *testing.T) { e1 := ErrHeightMismatch(2, 3) e1.Error() assert.True(t, IsHeightMismatchErr(e1)) e2 := errors.New("foobar") assert.False(t, IsHeightMismatchErr(e2)) assert.False(t, IsHeightMismatchErr(nil)) }