/*
Copyright (c) Emir Pasic, All rights reserved.

This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 3.0 of the License, or (at your option) any later version.

This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public
License along with this library. See the file LICENSE included
with this distribution for more information.
*/

package hashmap

import (
	"fmt"
	"testing"
)

func TestHashMap(t *testing.T) {

	m := New()

	// insertions
	m.Put(5, "e")
	m.Put(6, "f")
	m.Put(7, "g")
	m.Put(3, "c")
	m.Put(4, "d")
	m.Put(1, "x")
	m.Put(2, "b")
	m.Put(1, "a") //overwrite

	// Test Size()
	if actualValue := m.Size(); actualValue != 7 {
		t.Errorf("Got %v expected %v", actualValue, 7)
	}

	// test Keys()
	if actualValue, expactedValue := m.Keys(), []interface{}{1, 2, 3, 4, 5, 6, 7}; !sameElements(actualValue, expactedValue) {
		t.Errorf("Got %v expected %v", actualValue, expactedValue)
	}

	// test Values()
	if actualValue, expactedValue := m.Values(), []interface{}{"a", "b", "c", "d", "e", "f", "g"}; !sameElements(actualValue, expactedValue) {
		t.Errorf("Got %v expected %v", actualValue, expactedValue)
	}

	// key,expectedValue,expectedFound
	tests1 := [][]interface{}{
		{1, "a", true},
		{2, "b", true},
		{3, "c", true},
		{4, "d", true},
		{5, "e", true},
		{6, "f", true},
		{7, "g", true},
		{8, nil, false},
	}

	for _, test := range tests1 {
		// retrievals
		actualValue, actualFound := m.Get(test[0])
		if actualValue != test[1] || actualFound != test[2] {
			t.Errorf("Got %v expected %v", actualValue, test[1])
		}
	}

	// removals
	m.Remove(5)
	m.Remove(6)
	m.Remove(7)
	m.Remove(8)
	m.Remove(5)

	// test Keys()
	if actualValue, expactedValue := m.Keys(), []interface{}{1, 2, 3, 4}; !sameElements(actualValue, expactedValue) {
		t.Errorf("Got %v expected %v", actualValue, expactedValue)
	}

	// test Values()
	if actualValue, expactedValue := m.Values(), []interface{}{"a", "b", "c", "d"}; !sameElements(actualValue, expactedValue) {
		t.Errorf("Got %v expected %v", actualValue, expactedValue)
	}
	// Test Size()
	if actualValue := m.Size(); actualValue != 4 {
		t.Errorf("Got %v expected %v", actualValue, 7)
	}

	tests2 := [][]interface{}{
		{1, "a", true},
		{2, "b", true},
		{3, "c", true},
		{4, "d", true},
		{5, nil, false},
		{6, nil, false},
		{7, nil, false},
		{8, nil, false},
	}

	for _, test := range tests2 {
		// retrievals
		actualValue, actualFound := m.Get(test[0])
		if actualValue != test[1] || actualFound != test[2] {
			t.Errorf("Got %v expected %v", actualValue, test[1])
		}
	}

	// removals
	m.Remove(1)
	m.Remove(4)
	m.Remove(2)
	m.Remove(3)
	m.Remove(2)
	m.Remove(2)

	// Test Keys()
	if actualValue, expactedValue := fmt.Sprintf("", m.Keys()...), ""; actualValue != expactedValue {
		t.Errorf("Got %v expected %v", actualValue, expactedValue)
	}

	// test Values()
	if actualValue, expactedValue := fmt.Sprintf("", m.Values()...), ""; actualValue != expactedValue {
		t.Errorf("Got %v expected %v", actualValue, expactedValue)
	}

	// Test Size()
	if actualValue := m.Size(); actualValue != 0 {
		t.Errorf("Got %v expected %v", actualValue, 0)
	}

	// Test Empty()
	if actualValue := m.Empty(); actualValue != true {
		t.Errorf("Got %v expected %v", actualValue, true)
	}

	m.Put(1, "a")
	m.Put(2, "b")
	m.Clear()

	// Test Empty()
	if actualValue := m.Empty(); actualValue != true {
		t.Errorf("Got %v expected %v", actualValue, true)
	}

}

func sameElements(a []interface{}, b []interface{}) bool {
	if len(a) != len(b) {
		return false
	}
	for _, av := range a {
		found := false
		for _, bv := range b {
			if av == bv {
				found = true
				break
			}
		}
		if !found {
			return false
		}
	}
	return true
}