// Copyright (c) 2014-2016 The btcsuite developers
// Use of this source code is governed by an ISC
// license that can be found in the LICENSE file.

package chaincfg

import (
	"bytes"
	"testing"

	"github.com/davecgh/go-spew/spew"
)

// TestGenesisBlock tests the genesis block of the main network for validity by
// checking the encoded bytes and hashes.
func TestGenesisBlock(t *testing.T) {
	// Encode the genesis block to raw bytes.
	var buf bytes.Buffer
	err := MainNetParams.GenesisBlock.Serialize(&buf)
	if err != nil {
		t.Fatalf("TestGenesisBlock: %v", err)
	}

	// Check hash of the block against expected hash.
	hash := MainNetParams.GenesisBlock.BlockHash()
	if !MainNetParams.GenesisHash.IsEqual(&hash) {
		t.Fatalf("TestGenesisBlock: Genesis block hash does not "+
			"appear valid - got %v, want %v", spew.Sdump(hash),
			spew.Sdump(MainNetParams.GenesisHash))
	}
}

// TestRegTestGenesisBlock tests the genesis block of the regression test
// network for validity by checking the encoded bytes and hashes.
func TestRegTestGenesisBlock(t *testing.T) {
	// Encode the genesis block to raw bytes.
	var buf bytes.Buffer
	err := RegressionNetParams.GenesisBlock.Serialize(&buf)
	if err != nil {
		t.Fatalf("TestRegTestGenesisBlock: %v", err)
	}

	// Check hash of the block against expected hash.
	hash := RegressionNetParams.GenesisBlock.BlockHash()
	if !RegressionNetParams.GenesisHash.IsEqual(&hash) {
		t.Fatalf("TestRegTestGenesisBlock: Genesis block hash does "+
			"not appear valid - got %v, want %v", spew.Sdump(hash),
			spew.Sdump(RegressionNetParams.GenesisHash))
	}
}

// TestTestNet3GenesisBlock tests the genesis block of the test network (version
// 3) for validity by checking the encoded bytes and hashes.
func TestTestNet3GenesisBlock(t *testing.T) {
	// Encode the genesis block to raw bytes.
	var buf bytes.Buffer
	err := TestNet3Params.GenesisBlock.Serialize(&buf)
	if err != nil {
		t.Fatalf("TestTestNet3GenesisBlock: %v", err)
	}

	// Check hash of the block against expected hash.
	hash := TestNet3Params.GenesisBlock.BlockHash()
	if !TestNet3Params.GenesisHash.IsEqual(&hash) {
		t.Fatalf("TestTestNet3GenesisBlock: Genesis block hash does "+
			"not appear valid - got %v, want %v", spew.Sdump(hash),
			spew.Sdump(TestNet3Params.GenesisHash))
	}
}

// TestSimNetGenesisBlock tests the genesis block of the simulation test network
// for validity by checking the encoded bytes and hashes.
func TestSimNetGenesisBlock(t *testing.T) {
	// Encode the genesis block to raw bytes.
	var buf bytes.Buffer
	err := SimNetParams.GenesisBlock.Serialize(&buf)
	if err != nil {
		t.Fatalf("TestSimNetGenesisBlock: %v", err)
	}

	// Check hash of the block against expected hash.
	hash := SimNetParams.GenesisBlock.BlockHash()
	if !SimNetParams.GenesisHash.IsEqual(&hash) {
		t.Fatalf("TestSimNetGenesisBlock: Genesis block hash does "+
			"not appear valid - got %v, want %v", spew.Sdump(hash),
			spew.Sdump(SimNetParams.GenesisHash))
	}
}

// TestSigNetGenesisBlock tests the genesis block of the signet test network for
// validity by checking the encoded bytes and hashes.
func TestSigNetGenesisBlock(t *testing.T) {
	// Encode the genesis block to raw bytes.
	var buf bytes.Buffer
	err := SigNetParams.GenesisBlock.Serialize(&buf)
	if err != nil {
		t.Fatalf("TestSigNetGenesisBlock: %v", err)
	}

	// Check hash of the block against expected hash.
	hash := SigNetParams.GenesisBlock.BlockHash()
	if !SigNetParams.GenesisHash.IsEqual(&hash) {
		t.Fatalf("TestSigNetGenesisBlock: Genesis block hash does "+
			"not appear valid - got %v, want %v", spew.Sdump(hash),
			spew.Sdump(SigNetParams.GenesisHash))
	}
}