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paginator_test.go
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paginator_test.go
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// Copyright 2022 The Gitea Authors.
// Copyright 2015 https://github.com/unknwon. Licensed under the Apache License, Version 2.0
// SPDX-License-Identifier: Apache-2.0
package paginator
import (
"testing"
"github.com/stretchr/testify/assert"
)
func TestPaginator(t *testing.T) {
t.Run("Basic logics", func(t *testing.T) {
p := New(0, -1, -1, 0)
assert.Equal(t, 1, p.PagingNum())
assert.True(t, p.IsFirst())
assert.False(t, p.HasPrevious())
assert.Equal(t, 1, p.Previous())
assert.False(t, p.HasNext())
assert.Equal(t, 1, p.Next())
assert.True(t, p.IsLast())
assert.Equal(t, 0, p.Total())
p = New(1, 10, 2, 0)
assert.Equal(t, 10, p.PagingNum())
assert.True(t, p.IsFirst())
assert.False(t, p.HasPrevious())
assert.False(t, p.HasNext())
assert.True(t, p.IsLast())
p = New(10, 10, 1, 0)
assert.Equal(t, 10, p.PagingNum())
assert.True(t, p.IsFirst())
assert.False(t, p.HasPrevious())
assert.False(t, p.HasNext())
assert.True(t, p.IsLast())
p = New(11, 10, 1, 0)
assert.Equal(t, 10, p.PagingNum())
assert.True(t, p.IsFirst())
assert.False(t, p.HasPrevious())
assert.True(t, p.HasNext())
assert.Equal(t, 2, p.Next())
assert.False(t, p.IsLast())
p = New(11, 10, 2, 0)
assert.Equal(t, 10, p.PagingNum())
assert.False(t, p.IsFirst())
assert.True(t, p.HasPrevious())
assert.Equal(t, 1, p.Previous())
assert.False(t, p.HasNext())
assert.True(t, p.IsLast())
p = New(20, 10, 2, 0)
assert.Equal(t, 10, p.PagingNum())
assert.False(t, p.IsFirst())
assert.True(t, p.HasPrevious())
assert.False(t, p.HasNext())
assert.True(t, p.IsLast())
p = New(25, 10, 2, 0)
assert.Equal(t, 10, p.PagingNum())
assert.False(t, p.IsFirst())
assert.True(t, p.HasPrevious())
assert.True(t, p.HasNext())
assert.False(t, p.IsLast())
})
t.Run("Generate pages", func(t *testing.T) {
p := New(0, 10, 1, 0)
pages := p.Pages()
assert.Empty(t, pages)
})
t.Run("Only current page", func(t *testing.T) {
p := New(0, 10, 1, 1)
pages := p.Pages()
assert.Len(t, pages, 1)
assert.Equal(t, 1, pages[0].Num())
assert.True(t, pages[0].IsCurrent())
p = New(1, 10, 1, 1)
pages = p.Pages()
assert.Len(t, pages, 1)
assert.Equal(t, 1, pages[0].Num())
assert.True(t, pages[0].IsCurrent())
})
t.Run("Total page number is less or equal", func(t *testing.T) {
p := New(1, 10, 1, 2)
pages := p.Pages()
assert.Len(t, pages, 1)
assert.Equal(t, 1, pages[0].Num())
assert.True(t, pages[0].IsCurrent())
p = New(11, 10, 1, 2)
pages = p.Pages()
assert.Len(t, pages, 2)
assert.Equal(t, 1, pages[0].Num())
assert.True(t, pages[0].IsCurrent())
assert.Equal(t, 2, pages[1].Num())
assert.False(t, pages[1].IsCurrent())
p = New(11, 10, 2, 2)
pages = p.Pages()
assert.Len(t, pages, 2)
assert.Equal(t, 1, pages[0].Num())
assert.False(t, pages[0].IsCurrent())
assert.Equal(t, 2, pages[1].Num())
assert.True(t, pages[1].IsCurrent())
p = New(25, 10, 2, 3)
pages = p.Pages()
assert.Len(t, pages, 3)
assert.Equal(t, 1, pages[0].Num())
assert.False(t, pages[0].IsCurrent())
assert.Equal(t, 2, pages[1].Num())
assert.True(t, pages[1].IsCurrent())
assert.Equal(t, 3, pages[2].Num())
assert.False(t, pages[2].IsCurrent())
})
t.Run("Has more previous pages ", func(t *testing.T) {
// ... 2
p := New(11, 10, 2, 1)
pages := p.Pages()
assert.Len(t, pages, 2)
assert.Equal(t, -1, pages[0].Num())
assert.False(t, pages[0].IsCurrent())
assert.Equal(t, 2, pages[1].Num())
assert.True(t, pages[1].IsCurrent())
// ... 2 3
p = New(21, 10, 2, 2)
pages = p.Pages()
assert.Len(t, pages, 3)
assert.Equal(t, -1, pages[0].Num())
assert.False(t, pages[0].IsCurrent())
assert.Equal(t, 2, pages[1].Num())
assert.True(t, pages[1].IsCurrent())
assert.Equal(t, 3, pages[2].Num())
assert.False(t, pages[2].IsCurrent())
// ... 2 3 4
p = New(31, 10, 3, 3)
pages = p.Pages()
assert.Len(t, pages, 4)
assert.Equal(t, -1, pages[0].Num())
assert.False(t, pages[0].IsCurrent())
assert.Equal(t, 2, pages[1].Num())
assert.False(t, pages[1].IsCurrent())
assert.Equal(t, 3, pages[2].Num())
assert.True(t, pages[2].IsCurrent())
assert.Equal(t, 4, pages[3].Num())
assert.False(t, pages[3].IsCurrent())
// ... 3 4 5
p = New(41, 10, 4, 3)
pages = p.Pages()
assert.Len(t, pages, 4)
assert.Equal(t, -1, pages[0].Num())
assert.False(t, pages[0].IsCurrent())
assert.Equal(t, 3, pages[1].Num())
assert.False(t, pages[1].IsCurrent())
assert.Equal(t, 4, pages[2].Num())
assert.True(t, pages[2].IsCurrent())
assert.Equal(t, 5, pages[3].Num())
assert.False(t, pages[3].IsCurrent())
// ... 4 5 6 7 8 9 10
p = New(100, 10, 9, 7)
pages = p.Pages()
assert.Len(t, pages, 8)
assert.Equal(t, -1, pages[0].Num())
assert.False(t, pages[0].IsCurrent())
assert.Equal(t, 4, pages[1].Num())
assert.False(t, pages[1].IsCurrent())
assert.Equal(t, 5, pages[2].Num())
assert.False(t, pages[2].IsCurrent())
assert.Equal(t, 6, pages[3].Num())
assert.False(t, pages[3].IsCurrent())
assert.Equal(t, 7, pages[4].Num())
assert.False(t, pages[4].IsCurrent())
assert.Equal(t, 8, pages[5].Num())
assert.False(t, pages[5].IsCurrent())
assert.Equal(t, 9, pages[6].Num())
assert.True(t, pages[6].IsCurrent())
assert.Equal(t, 10, pages[7].Num())
assert.False(t, pages[7].IsCurrent())
})
t.Run("Has more next pages", func(t *testing.T) {
// 1 ...
p := New(21, 10, 1, 1)
pages := p.Pages()
assert.Len(t, pages, 2)
assert.Equal(t, 1, pages[0].Num())
assert.True(t, pages[0].IsCurrent())
assert.Equal(t, -1, pages[1].Num())
assert.False(t, pages[1].IsCurrent())
// 1 2 ...
p = New(21, 10, 1, 2)
pages = p.Pages()
assert.Len(t, pages, 3)
assert.Equal(t, 1, pages[0].Num())
assert.True(t, pages[0].IsCurrent())
assert.Equal(t, 2, pages[1].Num())
assert.False(t, pages[1].IsCurrent())
assert.Equal(t, -1, pages[2].Num())
assert.False(t, pages[2].IsCurrent())
// 1 2 3 ...
p = New(31, 10, 2, 3)
pages = p.Pages()
assert.Len(t, pages, 4)
assert.Equal(t, 1, pages[0].Num())
assert.False(t, pages[0].IsCurrent())
assert.Equal(t, 2, pages[1].Num())
assert.True(t, pages[1].IsCurrent())
assert.Equal(t, 3, pages[2].Num())
assert.False(t, pages[2].IsCurrent())
assert.Equal(t, -1, pages[3].Num())
assert.False(t, pages[3].IsCurrent())
// 1 2 3 ...
p = New(41, 10, 2, 3)
pages = p.Pages()
assert.Len(t, pages, 4)
assert.Equal(t, 1, pages[0].Num())
assert.False(t, pages[0].IsCurrent())
assert.Equal(t, 2, pages[1].Num())
assert.True(t, pages[1].IsCurrent())
assert.Equal(t, 3, pages[2].Num())
assert.False(t, pages[2].IsCurrent())
assert.Equal(t, -1, pages[3].Num())
assert.False(t, pages[3].IsCurrent())
// 1 2 3 4 5 6 7 ...
p = New(100, 10, 1, 7)
pages = p.Pages()
assert.Len(t, pages, 8)
assert.Equal(t, 1, pages[0].Num())
assert.True(t, pages[0].IsCurrent())
assert.Equal(t, 2, pages[1].Num())
assert.False(t, pages[1].IsCurrent())
assert.Equal(t, 3, pages[2].Num())
assert.False(t, pages[2].IsCurrent())
assert.Equal(t, 4, pages[3].Num())
assert.False(t, pages[3].IsCurrent())
assert.Equal(t, 5, pages[4].Num())
assert.False(t, pages[4].IsCurrent())
assert.Equal(t, 6, pages[5].Num())
assert.False(t, pages[5].IsCurrent())
assert.Equal(t, 7, pages[6].Num())
assert.False(t, pages[6].IsCurrent())
assert.Equal(t, -1, pages[7].Num())
assert.False(t, pages[7].IsCurrent())
// 1 2 3 4 5 6 7 ...
p = New(100, 10, 2, 7)
pages = p.Pages()
assert.Len(t, pages, 8)
assert.Equal(t, 1, pages[0].Num())
assert.False(t, pages[0].IsCurrent())
assert.Equal(t, 2, pages[1].Num())
assert.True(t, pages[1].IsCurrent())
assert.Equal(t, 3, pages[2].Num())
assert.False(t, pages[2].IsCurrent())
assert.Equal(t, 4, pages[3].Num())
assert.False(t, pages[3].IsCurrent())
assert.Equal(t, 5, pages[4].Num())
assert.False(t, pages[4].IsCurrent())
assert.Equal(t, 6, pages[5].Num())
assert.False(t, pages[5].IsCurrent())
assert.Equal(t, 7, pages[6].Num())
assert.False(t, pages[6].IsCurrent())
assert.Equal(t, -1, pages[7].Num())
assert.False(t, pages[7].IsCurrent())
})
t.Run("Has both more previous and next pages", func(t *testing.T) {
// ... 2 3 ...
p := New(35, 10, 2, 2)
pages := p.Pages()
assert.Len(t, pages, 4)
assert.Equal(t, -1, pages[0].Num())
assert.False(t, pages[0].IsCurrent())
assert.Equal(t, 2, pages[1].Num())
assert.True(t, pages[1].IsCurrent())
assert.Equal(t, 3, pages[2].Num())
assert.False(t, pages[2].IsCurrent())
assert.Equal(t, -1, pages[3].Num())
assert.False(t, pages[3].IsCurrent())
// ... 2 3 4 ...
p = New(49, 10, 3, 3)
pages = p.Pages()
assert.Len(t, pages, 5)
assert.Equal(t, -1, pages[0].Num())
assert.False(t, pages[0].IsCurrent())
assert.Equal(t, 2, pages[1].Num())
assert.False(t, pages[1].IsCurrent())
assert.Equal(t, 3, pages[2].Num())
assert.True(t, pages[2].IsCurrent())
assert.Equal(t, 4, pages[3].Num())
assert.False(t, pages[3].IsCurrent())
assert.Equal(t, -1, pages[4].Num())
assert.False(t, pages[4].IsCurrent())
})
}