package zfs

import (
	"github.com/stretchr/testify/assert"
	"testing"
)

func TestZFSListHandlesProducesZFSErrorOnNonZeroExit(t *testing.T) {
	var err error

	ZFS_BINARY = "./test_helpers/zfs_failer.sh"

	_, err = ZFSList([]string{"fictionalprop"}, "nonexistent/dataset")

	assert.Error(t, err)
	zfsError, ok := err.(ZFSError)
	assert.True(t, ok)
	assert.Equal(t, "error: this is a mock\n", string(zfsError.Stderr))
}

func TestDatasetPathTrimNPrefixComps(t *testing.T) {
	p, err := NewDatasetPath("foo/bar/a/b")
	assert.Nil(t, err)
	p.TrimNPrefixComps(2)
	assert.True(t, p.Equal(toDatasetPath("a/b")))
	p.TrimNPrefixComps((2))
	assert.True(t, p.Empty())
	p.TrimNPrefixComps((1))
	assert.True(t, p.Empty(), "empty trimming shouldn't do harm")
}