refactor(pkg): merge pkg/utils into pkg/util

Consolidate pure helper packages under pkg/util and update imports.

pkg/util/format_test.go

@@ -0,0 +1,49 @@
+package util
+
+import (
+	"testing"
+)
+
+func TestBytes2Size(t *testing.T) {
+	tests := []struct {
+		input    int64
+		expected string
+	}{
+		{0, "0 B"},
+		{500, "500 B"},
+		{1023, "1023 B"},
+		{1024, "1 KB"},
+		{2048, "2 KB"},
+		{1024 * 1024, "1 MB"},
+		{1024 * 1024 * 1024, "1.00 GB"},
+		{1024 * 1024 * 1024 * 2, "2.00 GB"},
+	}
+
+	for _, tt := range tests {
+		result := Bytes2Size(tt.input)
+		if result != tt.expected {
+			t.Errorf("Bytes2Size(%d) = %q, expected %q", tt.input, result, tt.expected)
+		}
+	}
+}
+
+func TestSeconds2Time(t *testing.T) {
+	tests := []struct {
+		input    int
+		expected string
+	}{
+		{0, "0 秒"},
+		{30, "30 秒"},
+		{60, "1 分钟 0 秒"},
+		{125, "2 分钟 5 秒"},
+		{3600, "1 小时 0 秒"},
+		{86400, "1 天 0 秒"},
+	}
+
+	for _, tt := range tests {
+		result := Seconds2Time(tt.input)
+		if result != tt.expected {
+			t.Errorf("Seconds2Time(%d) = %q, expected %q", tt.input, result, tt.expected)
+		}
+	}
+}