mirror of
https://github.com/AthanorLabs/atomic-swap.git
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48 lines
1.2 KiB
Go
48 lines
1.2 KiB
Go
// Copyright 2023 The AthanorLabs/atomic-swap Authors
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// SPDX-License-Identifier: LGPL-3.0-only
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package coins
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import (
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"math"
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"testing"
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"github.com/cockroachdb/apd/v3"
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"github.com/stretchr/testify/assert"
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"github.com/stretchr/testify/require"
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)
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func Test_increaseExponent(t *testing.T) {
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n := apd.New(2, 0) // 2.00
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increaseExponent(n, 2)
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assert.Equal(t, "200", n.Text('f'))
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}
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func Test_increaseExponent_overflowPanics(t *testing.T) {
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n := apd.New(2, math.MaxInt32)
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defer func() {
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require.NotNil(t, recover()) // if recover returns nil, we didn't panic
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}()
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increaseExponent(n, 1)
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}
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func Test_decreaseExponent(t *testing.T) {
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n := apd.New(300, 0) // 300
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decreaseExponent(n, 3)
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// Right now the string value would be 0.300, because trailing zeros in the
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// coefficient are printed. Next line will strip trailing zeros from the
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// coefficient and add them to the exponent making the string value 0.3.
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_, _ = n.Reduce(n)
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assert.Equal(t, "0.3", n.Text('f'))
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}
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func Test_decreaseExponent_underflowPanics(t *testing.T) {
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n := apd.New(2, math.MinInt32)
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defer func() {
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require.NotNil(t, recover()) // if recover returns nil, we didn't panic
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}()
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decreaseExponent(n, 1)
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}
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