func TestCSVWriterStruct(t *testing.T) {
fname := "testdata/out-struct.csv"
tbl, err := csvutil.Create(fname)
if err != nil {
t.Errorf("could not create %s: %v\n", fname, err)
}
defer tbl.Close()
tbl.Writer.Comma = ';'
// test WriteHeader w/o a trailing newline
err = tbl.WriteHeader("## a simple set of data: int64;float64;string")
if err != nil {
t.Errorf("error writing header: %v\n", err)
}
for i := 0; i < 10; i++ {
data := struct {
I int
F float64
S string
}{
I: i,
F: float64(i),
S: fmt.Sprintf("str-%d", i),
}
err = tbl.WriteRow(data)
if err != nil {
t.Errorf("error writing row %d: %v\n", i, err)
break
}
}
err = tbl.Close()
if err != nil {
t.Errorf("error closing table: %v\n", err)
}
err = diff("testdata/simple.csv", fname)
if err != nil {
t.Errorf("files differ: %v\n", err)
}
}
func TestCSVWriterArgs(t *testing.T) {
fname := "testdata/out-args.csv"
tbl, err := csvutil.Create(fname)
if err != nil {
t.Errorf("could not create %s: %v\n", fname, err)
}
defer tbl.Close()
tbl.Writer.Comma = ';'
err = tbl.WriteHeader("## a simple set of data: int64;float64;string\n")
if err != nil {
t.Errorf("error writing header: %v\n", err)
}
for i := 0; i < 10; i++ {
var (
f = float64(i)
s = fmt.Sprintf("str-%d", i)
)
err = tbl.WriteRow(i, f, s)
if err != nil {
t.Errorf("error writing row %d: %v\n", i, err)
break
}
}
err = tbl.Close()
if err != nil {
t.Errorf("error closing table: %v\n", err)
}
err = diff("testdata/simple.csv", fname)
if err != nil {
t.Errorf("files differ: %v\n", err)
}
}
func TestCSVAppend(t *testing.T) {
fname := "testdata/append-test.csv"
tbl, err := csvutil.Create(fname)
if err != nil {
t.Fatal(err)
}
defer tbl.Close()
tbl.Writer.Comma = ';'
// test WriteHeader w/o a trailing newline
err = tbl.WriteHeader("## a simple set of data: int64;float64;string")
if err != nil {
t.Errorf("error writing header: %v\n", err)
}
for i := 0; i < 10; i++ {
data := struct {
I int
F float64
S string
}{
I: i,
F: float64(i),
S: fmt.Sprintf("str-%d", i),
}
err = tbl.WriteRow(data)
if err != nil {
t.Errorf("error writing row %d: %v\n", i, err)
break
}
}
err = tbl.Close()
if err != nil {
t.Errorf("error closing table: %v\n", err)
}
// re-open to append
tbl, err = csvutil.Append(fname)
if err != nil {
t.Fatal(err)
}
defer tbl.Close()
tbl.Writer.Comma = ';'
for i := 10; i < 20; i++ {
data := struct {
I int
F float64
S string
}{
I: i,
F: float64(i),
S: fmt.Sprintf("str-%d", i),
}
err = tbl.WriteRow(data)
if err != nil {
t.Errorf("error writing row %d: %v\n", i, err)
break
}
}
err = tbl.Close()
if err != nil {
t.Fatal(err)
}
err = diff("testdata/append.csv", fname)
if err != nil {
t.Errorf("files differ: %v\n", err)
}
}