cosmos-sdk/types/coin_test.go

package types

import (
	"fmt"
	"testing"

	"github.com/stretchr/testify/assert"
)

func TestCoins(t *testing.T) {
	assert := assert.New(t)

	//Define the coins to be used in tests
	good := Coins{
		Coin{"GAS", 1},
		Coin{"MINERAL", 1},
		Coin{"TREE", 1},
	}
	neg := good.Negative()
	sum := good.Plus(neg)
	empty := Coins{
		Coin{"GOLD", 0},
	}
	badSort1 := Coins{
		Coin{"TREE", 1},
		Coin{"GAS", 1},
		Coin{"MINERAL", 1},
	}
	badSort2 := Coins{ // both are after the first one, but the second and third are in the wrong order
		Coin{"GAS", 1},
		Coin{"TREE", 1},
		Coin{"MINERAL", 1},
	}
	badAmt := Coins{
		Coin{"GAS", 1},
		Coin{"TREE", 0},
		Coin{"MINERAL", 1},
	}
	dup := Coins{
		Coin{"GAS", 1},
		Coin{"GAS", 1},
		Coin{"MINERAL", 1},
	}

	assert.True(good.IsValid(), "Coins are valid")
	assert.True(good.IsPositive(), fmt.Sprintf("Expected coins to be positive: %v", good))
	assert.True(good.IsGTE(empty), fmt.Sprintf("Expected %v to be >= %v", good, empty))
	assert.False(neg.IsPositive(), fmt.Sprintf("Expected neg coins to not be positive: %v", neg))
	assert.Zero(len(sum), "Expected 0 coins")
	assert.False(badSort1.IsValid(), "Coins are not sorted")
	assert.False(badSort2.IsValid(), "Coins are not sorted")
	assert.False(badAmt.IsValid(), "Coins cannot include 0 amounts")
	assert.False(dup.IsValid(), "Duplicate coin")

}