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package vlog
import (
"bytes"
"fmt"
"os"
"testing"
)
func captureStdout(f func()) string {
old := os.Stdout
r, w, _ := os.Pipe()
os.Stdout = w
f()
w.Close()
os.Stdout = old
var buf bytes.Buffer
buf.ReadFrom(r)
return buf.String()
}
func TestPrintfVerbose(t *testing.T) {
VERBOSE = true
defer func() { VERBOSE = false }()
output := captureStdout(func() {
Printf("hello %s", "world")
})
expected := fmt.Sprintf("hello %s", "world")
if output != expected {
t.Errorf("expected %q, got %q", expected, output)
}
}
func TestPrintfSilent(t *testing.T) {
VERBOSE = false
output := captureStdout(func() {
Printf("hello %s", "world")
})
if output != "" {
t.Errorf("expected empty output when not verbose, got %q", output)
}
}
func TestPrintlnVerbose(t *testing.T) {
VERBOSE = true
defer func() { VERBOSE = false }()
output := captureStdout(func() {
Println("hello", "world")
})
expected := fmt.Sprintln("hello", "world")
if output != expected {
t.Errorf("expected %q, got %q", expected, output)
}
}
func TestPrintlnSilent(t *testing.T) {
VERBOSE = false
output := captureStdout(func() {
Println("hello", "world")
})
if output != "" {
t.Errorf("expected empty output when not verbose, got %q", output)
}
}
func TestInit(t *testing.T) {
// init() sets VERBOSE to false
if VERBOSE != false {
t.Error("VERBOSE should default to false")
}
}
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