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|
package dstream
import (
"bytes"
"fmt"
"os"
"strings"
"testing"
)
func TestStreamCSV1(t *testing.T) {
x1 := []interface{}{
[]float64{1, 2, 3},
[]float64{4, 5},
}
x2 := []interface{}{
[]float64{34, 19, 45},
[]float64{46, 44},
}
x3 := []interface{}{
[]string{"Argentina", "Canada", "India"},
[]string{"Mexico", "Egypt"},
}
dat := [][]interface{}{x1, x2, x3}
na := []string{"Id", "Age", "Country"}
ex := NewFromArrays(dat, na)
var bbuf bytes.Buffer
bbuf.Write([]byte("Id,Country,Pop,Age\n"))
bbuf.Write([]byte("1,Argentina,29,34\n"))
bbuf.Write([]byte("2,Canada,17,19\n"))
bbuf.Write([]byte("3,India,234,45\n"))
bbuf.Write([]byte("4,Mexico,94,46\n"))
bbuf.Write([]byte("5,Egypt,89,44\n"))
rdr := bytes.NewReader(bbuf.Bytes())
// Test that it works in a different order, and omitting a column
types := []VarType{
{"Id", Float64},
{"Age", Float64},
{"Country", String},
}
da := FromCSV(rdr).SetTypes(types).ChunkSize(3).HasHeader().Done()
// Check first read
if !EqualReport(ex, da, true) {
t.Fail()
}
// Make sure reset/reread works
da.Reset()
if !EqualReport(ex, da, true) {
t.Fail()
}
if da.NumObs() != 5 {
t.Fail()
}
if da.NumVar() != 3 {
t.Fail()
}
// Make sure we can get variables by name and by position.
f, msg := checkPosName(da)
if !f {
print(msg)
t.Fail()
}
}
func TestStreamCSV2(t *testing.T) {
x1 := []interface{}{
[]float64{1, 2, 3},
[]float64{4, 5},
}
x2 := []interface{}{
[]float64{34, 19, 45},
[]float64{46, 44},
}
dat := [][]interface{}{x1, x2}
na := []string{"Id", "Age"}
ex := NewFromArrays(dat, na)
var bbuf bytes.Buffer
bbuf.Write([]byte("Id,Age\n"))
bbuf.Write([]byte("1,34\n"))
bbuf.Write([]byte("2,19\n"))
bbuf.Write([]byte("3,45\n"))
bbuf.Write([]byte("4,46\n"))
bbuf.Write([]byte("5,44\n"))
rdr := bytes.NewReader(bbuf.Bytes())
types := []VarType{
{"Id", Float64},
{"Age", Float64},
}
da := FromCSV(rdr).SetTypes(types).ChunkSize(3).HasHeader().Done()
// Check first read
if !EqualReport(ex, da, true) {
t.Fail()
}
// Make sure reset/reread works
da.Reset()
if !EqualReport(ex, da, true) {
t.Fail()
}
if da.NumObs() != 5 {
msg := fmt.Sprintf("Incorrect number of observations (found %d, expected 3)\n", da.NumObs())
os.Stderr.WriteString(msg)
t.Fail()
}
if da.NumVar() != 2 {
msg := fmt.Sprintf("Incorrect number of variables (found %d, expected 3)\n", da.NumVar())
os.Stderr.WriteString(msg)
t.Fail()
}
// Make sure we can get variables by name and by position.
f, msg := checkPosName(da)
if !f {
print(msg)
t.Fail()
}
}
func TestStreamCSV3(t *testing.T) {
x1 := []interface{}{
[]string{"1", "2", "3"},
[]string{"4", "5"},
}
x2 := []interface{}{
[]string{"34", "19", "45"},
[]string{"46", "44"},
}
dat := [][]interface{}{x1, x2}
na := []string{"Id", "Age"}
ex := NewFromArrays(dat, na)
var bbuf bytes.Buffer
bbuf.Write([]byte("Id,Age\n"))
bbuf.Write([]byte("1,34\n"))
bbuf.Write([]byte("2,19\n"))
bbuf.Write([]byte("3,45\n"))
bbuf.Write([]byte("4,46\n"))
bbuf.Write([]byte("5,44\n"))
rdr := bytes.NewReader(bbuf.Bytes())
types := []VarType{
{"Id", String},
{"Age", String},
}
da := FromCSV(rdr).SetTypes(types).ChunkSize(3).HasHeader().Done()
// Check first read
if !EqualReport(ex, da, true) {
t.Fail()
}
// Make sure reset/reread works
da.Reset()
if !EqualReport(ex, da, true) {
t.Fail()
}
if da.NumObs() != 5 {
msg := fmt.Sprintf("Incorrect number of observations (found %d, expected 3)\n", da.NumObs())
os.Stderr.WriteString(msg)
t.Fail()
}
if da.NumVar() != 2 {
msg := fmt.Sprintf("Incorrect number of variables (found %d, expected 3)\n", da.NumVar())
os.Stderr.WriteString(msg)
t.Fail()
}
// Make sure we can get variables by name and by position.
f, msg := checkPosName(da)
if !f {
print(msg)
t.Fail()
}
}
func TestCSVWriter1(t *testing.T) {
data1 := `id,v1,v2,v3
1,2,3,4
1,3,4,5
2,4,5,6
3,5,6,7
3,99,99,99
3,100,101,102
4,200,201,202
`
r := strings.NewReader(data1)
types := []VarType{
{"id", Float64},
{"v1", Float64},
{"v2", Float64},
{"v3", Float64},
}
ds := FromCSV(r).SetTypes(types).ChunkSize(2).HasHeader().Done()
var buf bytes.Buffer
fm := map[string]string{"v1": "%.1f"}
err := ToCSV(ds).SetWriter(&buf).FloatFmt("%.0f").Formats(fm).Done()
if err != nil {
panic(err)
}
es := `id,v1,v2,v3
1,2.0,3,4
1,3.0,4,5
2,4.0,5,6
3,5.0,6,7
3,99.0,99,99
3,100.0,101,102
4,200.0,201,202
`
if es != buf.String() {
t.Fail()
}
}
|
