init

tests/unit/pagination_test.go

@@ -0,0 +1,128 @@
+package unit
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/suite"
+)
+
+// PaginationTestSuite 分页测试套件
+type PaginationTestSuite struct {
+	suite.Suite
+}
+
+func TestPaginationTestSuite(t *testing.T) {
+	suite.Run(t, new(PaginationTestSuite))
+}
+
+func (s *PaginationTestSuite) SetupTest() {
+}
+
+func (s *PaginationTestSuite) TearDownTest() {
+}
+
+// paginateSlice 模拟分页函数
+func paginateSlice[T any](slice []T, page, pageSize int) ([]T, int64) {
+	total := int64(len(slice))
+	if total == 0 {
+		return []T{}, 0
+	}
+
+	start := (page - 1) * pageSize
+	end := start + pageSize
+
+	if start >= len(slice) {
+		return []T{}, total
+	}
+
+	if end > len(slice) {
+		end = len(slice)
+	}
+
+	return slice[start:end], total
+}
+
+// validatePagination 模拟分页参数验证
+func validatePagination(page, pageSize int) (int, int) {
+	if page < 1 {
+		page = 1
+	}
+	if pageSize < 1 {
+		pageSize = 10
+	}
+	const maxPageSize = 100
+	if pageSize > maxPageSize {
+		pageSize = maxPageSize
+	}
+	return page, pageSize
+}
+
+// TestPaginateSlice_EmptySlice 测试空切片
+func (s *PaginationTestSuite) TestPaginateSlice_EmptySlice() {
+	result, total := paginateSlice([]int{}, 1, 10)
+
+	s.Empty(result)
+	s.Equal(int64(0), total)
+}
+
+// TestPaginateSlice_FirstPage 测试第一页
+func (s *PaginationTestSuite) TestPaginateSlice_FirstPage() {
+	slice := []int{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}
+	result, total := paginateSlice(slice, 1, 3)
+
+	s.Equal([]int{1, 2, 3}, result)
+	s.Equal(int64(10), total)
+}
+
+// TestPaginateSlice_MiddlePage 测试中间页
+func (s *PaginationTestSuite) TestPaginateSlice_MiddlePage() {
+	slice := []int{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}
+	result, total := paginateSlice(slice, 2, 3)
+
+	s.Equal([]int{4, 5, 6}, result)
+	s.Equal(int64(10), total)
+}
+
+// TestPaginateSlice_LastPage 测试最后一页（不满）
+func (s *PaginationTestSuite) TestPaginateSlice_LastPage() {
+	slice := []int{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}
+	result, total := paginateSlice(slice, 4, 3)
+
+	s.Equal([]int{10}, result)
+	s.Equal(int64(10), total)
+}
+
+// TestPaginateSlice_OutOfRange 测试超出范围的页码
+func (s *PaginationTestSuite) TestPaginateSlice_OutOfRange() {
+	slice := []int{1, 2, 3, 4, 5}
+	result, total := paginateSlice(slice, 10, 3)
+
+	s.Empty(result)
+	s.Equal(int64(5), total)
+}
+
+// TestValidatePagination 测试分页参数验证
+func (s *PaginationTestSuite) TestValidatePagination() {
+	tests := []struct {
+		name         string
+		page         int
+		pageSize     int
+		wantPage     int
+		wantPageSize int
+	}{
+		{"正常值", 1, 10, 1, 10},
+		{"page 小于 1", 0, 10, 1, 10},
+		{"page 为负数", -5, 10, 1, 10},
+		{"pageSize 小于 1", 1, 0, 1, 10},
+		{"pageSize 超过最大值", 1, 200, 1, 100},
+		{"两者都异常", -1, -1, 1, 10},
+	}
+
+	for _, tt := range tests {
+		s.Run(tt.name, func() {
+			gotPage, gotPageSize := validatePagination(tt.page, tt.pageSize)
+			s.Equal(tt.wantPage, gotPage)
+			s.Equal(tt.wantPageSize, gotPageSize)
+		})
+	}
+}