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// Copyright 2020 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package maps
import (
"math"
"sort"
"testing"
"slices"
)
var m1 = map[int]int{1: 2, 2: 4, 4: 8, 8: 16}
var m2 = map[int]string{1: "2", 2: "4", 4: "8", 8: "16"}
func TestKeys(t *testing.T) {
want := []int{1, 2, 4, 8}
got1 := Keys(m1)
sort.Ints(got1)
if !slices.Equal(got1, want) {
t.Errorf("Keys(%v) = %v, want %v", m1, got1, want)
}
got2 := Keys(m2)
sort.Ints(got2)
if !slices.Equal(got2, want) {
t.Errorf("Keys(%v) = %v, want %v", m2, got2, want)
}
}
func TestValues(t *testing.T) {
got1 := Values(m1)
want1 := []int{2, 4, 8, 16}
sort.Ints(got1)
if !slices.Equal(got1, want1) {
t.Errorf("Values(%v) = %v, want %v", m1, got1, want1)
}
got2 := Values(m2)
want2 := []string{"16", "2", "4", "8"}
sort.Strings(got2)
if !slices.Equal(got2, want2) {
t.Errorf("Values(%v) = %v, want %v", m2, got2, want2)
}
}
func TestEqual(t *testing.T) {
if !Equal(m1, m1) {
t.Errorf("Equal(%v, %v) = false, want true", m1, m1)
}
if Equal(m1, nil) {
t.Errorf("Equal(%v, nil) = true, want false", m1)
}
if Equal(nil, m1) {
t.Errorf("Equal(nil, %v) = true, want false", m1)
}
if !Equal[int, int](nil, nil) {
t.Error("Equal(nil, nil) = false, want true")
}
if ms := map[int]int{1: 2}; Equal(m1, ms) {
t.Errorf("Equal(%v, %v) = true, want false", m1, ms)
}
// Comparing NaN for equality is expected to fail.
mf := map[int]float64{1: 0, 2: math.NaN()}
if Equal(mf, mf) {
t.Errorf("Equal(%v, %v) = true, want false", mf, mf)
}
}
func TestCopy(t *testing.T) {
m2 := Copy(m1)
if !Equal(m1, m2) {
t.Errorf("Copy(%v) = %v, want %v", m1, m2, m1)
}
m2[16] = 32
if Equal(m1, m2) {
t.Errorf("Equal(%v, %v) = true, want false", m1, m2)
}
}
func TestAdd(t *testing.T) {
mc := Copy(m1)
Add(mc, mc)
if !Equal(mc, m1) {
t.Errorf("Add(%v, %v) = %v, want %v", m1, m1, mc, m1)
}
Add(mc, map[int]int{16: 32})
want := map[int]int{1: 2, 2: 4, 4: 8, 8: 16, 16: 32}
if !Equal(mc, want) {
t.Errorf("Add result = %v, want %v", mc, want)
}
}
func TestSub(t *testing.T) {
mc := Copy(m1)
Sub(mc, mc)
if len(mc) > 0 {
t.Errorf("Sub(%v, %v) = %v, want empty map", m1, m1, mc)
}
mc = Copy(m1)
Sub(mc, map[int]int{1: 0})
want := map[int]int{2: 4, 4: 8, 8: 16}
if !Equal(mc, want) {
t.Errorf("Sub result = %v, want %v", mc, want)
}
}
func TestIntersect(t *testing.T) {
mc := Copy(m1)
Intersect(mc, mc)
if !Equal(mc, m1) {
t.Errorf("Intersect(%v, %v) = %v, want %v", m1, m1, mc, m1)
}
Intersect(mc, map[int]int{1: 0, 2: 0})
want := map[int]int{1: 2, 2: 4}
if !Equal(mc, want) {
t.Errorf("Intersect result = %v, want %v", mc, want)
}
}
func TestFilter(t *testing.T) {
mc := Copy(m1)
Filter(mc, func(int, int) bool { return true })
if !Equal(mc, m1) {
t.Errorf("Filter(%v, true) = %v, want %v", m1, mc, m1)
}
Filter(mc, func(k, v int) bool { return k < 3 })
want := map[int]int{1: 2, 2: 4}
if !Equal(mc, want) {
t.Errorf("Filter result = %v, want %v", mc, want)
}
}
func TestTransformValues(t *testing.T) {
mc := Copy(m1)
TransformValues(mc, func(i int) int { return i / 2 })
want := map[int]int{1: 1, 2: 2, 4: 4, 8: 8}
if !Equal(mc, want) {
t.Errorf("TransformValues result = %v, want %v", mc, want)
}
}
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