Function TestSyncSparseFile

test/sync_test.go:313–380

(t *testing.T)

}

func TestSyncSparseFile(t *testing.T) {
	// This test verifies that when syncing a file that consists mostly of
	// zeroes, those blocks are not transferred. It doesn't verify whether
	// the resulting file is actually *sparse* or not.

	log.Println("Cleaning...")
	err := removeAll("s1", "s12-1",
		"s2", "s12-2", "s23-2",
		"s3", "s23-3",
		"h1/index*", "h2/index*", "h3/index*")
	if err != nil {
		t.Fatal(err)
	}

	log.Println("Generating files...")

	if err := os.Mkdir("s1", 0o755); err != nil {
		t.Fatal(err)
	}

	fd, err := os.Create("s1/testfile")
	if err != nil {
		t.Fatal(err)
	}
	if _, err := fd.Write([]byte("Start")); err != nil {
		t.Fatal(err)
	}
	kib := make([]byte, 1024)
	for i := 0; i < 8192; i++ {
		if _, err := fd.Write(kib); err != nil {
			t.Fatal(err)
		}
	}
	if _, err := fd.Write([]byte("End")); err != nil {
		t.Fatal(err)
	}
	fd.Close()

	// Start the syncers

	log.Println("Syncing...")

	p0 := startInstance(t, 1)
	defer checkedStop(t, p0)
	p1 := startInstance(t, 2)
	defer checkedStop(t, p1)

	p0.ResumeAll()
	p1.ResumeAll()

	rc.AwaitSync("default", p0, p1)

	log.Println("Comparing...")

	if err := compareDirectories("s1", "s2"); err != nil {
		t.Fatal(err)
	}