90 lines
1.9 KiB
Go
90 lines
1.9 KiB
Go
package tail
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import (
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"testing"
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"time"
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"os"
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"io/ioutil"
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_ "fmt"
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)
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func init() {
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err := os.RemoveAll(".test")
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if err != nil {
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panic(err)
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}
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}
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// Test Config.MustExist
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func TestMissingFile(t *testing.T) {
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tail, err := TailFile("/no/such/file", Config{Follow: true, MustExist: true})
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if err == nil {
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t.Error("MustExist:true is violated")
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tail.Stop()
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}
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tail, err = TailFile("/no/such/file", Config{Follow: true, MustExist: false})
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if err != nil {
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t.Error("MustExist:false is violated")
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}
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tail.Stop()
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_, err = TailFile("README.md", Config{Follow: true, MustExist: true})
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if err != nil {
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t.Error("MustExist:true on an existing file is violated")
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}
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tail.Stop()
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}
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func TestLocationMinusOne(t *testing.T) {
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fix := NewFixture("simple")
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err := ioutil.WriteFile(fix.path + "/test.txt", []byte("hello\nworld\n"), 0777)
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if err != nil {
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t.Error(err)
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}
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tail, err := TailFile(fix.path + "/test.txt", Config{Follow: true, Location: -1})
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if err != nil {
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t.Error(err)
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}
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go CompareTailWithLines(t, tail, []string{"hello", "world"})
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// delete after 1 second, to give tail sufficient time to read all lines.
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<-time.After(1 * time.Second)
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err = os.Remove(fix.path + "/test.txt")
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if err != nil {
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t.Error(err)
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}
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tail.Stop()
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}
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type Fixture struct {
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Name string
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path string
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}
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func NewFixture(name string) Fixture {
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fix := Fixture{name, ".test/" + name}
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os.MkdirAll(fix.path, os.ModeTemporary | 0700)
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return fix
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}
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func CompareTailWithLines(t *testing.T, tail *Tail, lines []string) {
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for _, line := range lines {
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tailedLine, ok := <-tail.Lines
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if !ok {
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t.Error("insufficient lines from tail")
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return
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}
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if tailedLine == nil {
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t.Errorf("tail.Lines returned nil; not possible")
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return
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}
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if tailedLine.Text != line {
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t.Errorf("mismatch; %s != %s", tailedLine.Text, line)
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return
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}
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}
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line, ok := <-tail.Lines
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if ok {
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t.Errorf("more content from tail: %s", line.Text)
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}
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}
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