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package command
import (
"testing"
"github.com/stretchr/testify/require"
)
func TestStderrBufferSingleWrite(t *testing.T) {
tests := []struct {
name string
input string
expectedOutput string
}{
{
name: "case empty input",
input: "",
expectedOutput: "",
},
{
name: "case single short line with delimiter",
input: "12345\n",
expectedOutput: "12345\n",
},
{
name: "case single short line without delimiter",
input: "12345",
expectedOutput: "12345",
},
{
name: "case single long line with delimiter",
input: "12345678901234567890\n",
expectedOutput: "1234567890\n",
},
{
name: "case single long line without delimiter",
input: "12345678901234567890",
expectedOutput: "1234567890",
},
{
name: "case multi lines not exceeding line limit",
input: "123\n1234\n12345",
expectedOutput: "123\n1234\n12345",
},
{
name: "case multi lines exceeding line limit",
input: "123\n12345678901234567890\n12345",
expectedOutput: "123\n1234567890\n12345",
},
{
name: "case multi lines exceeding buf limit",
input: "1234567890\n1234567890\n1234567890\n1234567890",
expectedOutput: "1234567890\n1234567890\n12345678",
},
{
name: "case multi lines exceeding line limit and buf limit",
input: "12345678901234567890\n12345678901234567890\n12345678901234567890\nn12345678901234567890",
expectedOutput: "1234567890\n1234567890\n12345678",
},
{
name: "case multi lines with blank lines",
input: "1234567890\n\n\n\n\n1234567890\n1234567890",
expectedOutput: "1234567890\n\n\n\n\n1234567890\n1234",
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
buf, err := newStderrBuffer(30, 10, nil)
require.NoError(t, err)
n, err := buf.Write([]byte(tt.input))
require.NoError(t, err)
require.Equal(t, len(tt.input), n)
require.Equal(t, tt.expectedOutput, buf.String())
})
}
}
func TestStderrBufferMultiWrite(t *testing.T) {
tests := []struct {
name string
input []string
expectedOutput string
}{
{
name: "case write not exceeding limit",
input: []string{"12345\n123", "45\n12345\n"},
expectedOutput: "12345\n12345\n12345\n",
},
{
name: "case write exceeding line limit between two writes",
input: []string{"12345\n12345", "678901234567890\n12345\n"},
expectedOutput: "12345\n1234567890\n12345\n",
},
{
name: "case write exceeding limit for second write",
input: []string{"1234567890\n1234567890\n12345", "67890\n1234567890\n"},
expectedOutput: "1234567890\n1234567890\n12345678",
},
{
name: "case write exceeding limit for first write",
input: []string{"1234567890\n1234567890\n1234567890\n1234567890\n", "1234567890\n1234567890\n"},
expectedOutput: "1234567890\n1234567890\n12345678",
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
buf, err := newStderrBuffer(30, 10, nil)
require.NoError(t, err)
for _, chunk := range tt.input {
n, err := buf.Write([]byte(chunk))
require.Equal(t, len(chunk), n)
require.NoError(t, err)
}
require.Equal(t, tt.expectedOutput, buf.String())
})
}
}
func TestStderrBufferWithInvalidLimit(t *testing.T) {
bufInvalidLimit, err := newStderrBuffer(100, -1, nil)
require.Nil(t, bufInvalidLimit)
require.Error(t, err)
}
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