b2a01d4d94
Provides fast transformations of int64 scaled values with overflow to inf.Dec as needed. Attempts to reduce allocations and expensive operations in the critical path. Alters the public signature of Quantity to encourage more efficient use
112 lines
3.2 KiB
Go
112 lines
3.2 KiB
Go
/*
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Copyright 2014 The Kubernetes Authors All rights reserved.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package resource
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import (
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"testing"
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)
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func TestInt64AmountAsInt64(t *testing.T) {
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for _, test := range []struct {
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value int64
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scale Scale
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result int64
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ok bool
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}{
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{100, 0, 100, true},
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{100, 1, 1000, true},
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{100, -5, 0, false},
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{100, 100, 0, false},
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} {
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r, ok := int64Amount{value: test.value, scale: test.scale}.AsInt64()
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if r != test.result {
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t.Errorf("%v: unexpected result: %d", test, r)
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}
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if ok != test.ok {
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t.Errorf("%v: unexpected ok: %t", test, ok)
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}
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}
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}
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func TestInt64AmountAdd(t *testing.T) {
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for _, test := range []struct {
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a, b, c int64Amount
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ok bool
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}{
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{int64Amount{value: 100, scale: 1}, int64Amount{value: 10, scale: 2}, int64Amount{value: 200, scale: 1}, true},
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{int64Amount{value: 100, scale: 1}, int64Amount{value: 1, scale: 2}, int64Amount{value: 110, scale: 1}, true},
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{int64Amount{value: 100, scale: 1}, int64Amount{value: 1, scale: 100}, int64Amount{value: 1, scale: 100}, false},
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{int64Amount{value: -5, scale: 2}, int64Amount{value: 50, scale: 1}, int64Amount{value: 0, scale: 1}, true},
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{int64Amount{value: -5, scale: 2}, int64Amount{value: 5, scale: 2}, int64Amount{value: 0, scale: 2}, true},
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{int64Amount{value: mostPositive, scale: -1}, int64Amount{value: 1, scale: -1}, int64Amount{value: 0, scale: -1}, false},
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{int64Amount{value: mostPositive, scale: -1}, int64Amount{value: 0, scale: -1}, int64Amount{value: mostPositive, scale: -1}, true},
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{int64Amount{value: mostPositive / 10, scale: 1}, int64Amount{value: 10, scale: 0}, int64Amount{value: mostPositive, scale: -1}, false},
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} {
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c := test.a
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ok := c.Add(test.b)
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if ok != test.ok {
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t.Errorf("%v: unexpected ok: %t", test, ok)
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}
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if ok {
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if c != test.c {
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t.Errorf("%v: unexpected result: %d", test, c)
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}
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} else {
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if c != test.a {
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t.Errorf("%v: overflow addition mutated source: %d", test, c)
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}
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}
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// addition is commutative
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c = test.b
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if ok := c.Add(test.a); ok != test.ok {
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t.Errorf("%v: unexpected ok: %t", test, ok)
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}
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if ok {
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if c != test.c {
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t.Errorf("%v: unexpected result: %d", test, c)
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}
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} else {
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if c != test.b {
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t.Errorf("%v: overflow addition mutated source: %d", test, c)
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}
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}
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}
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}
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func TestInt64AsCanonicalString(t *testing.T) {
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for _, test := range []struct {
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value int64
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scale Scale
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result string
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exponent int32
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}{
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{100, 0, "100", 0},
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{100, 1, "1", 3},
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{100, -1, "10", 0},
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{10800, -10, "1080", -9},
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} {
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r, exp := int64Amount{value: test.value, scale: test.scale}.AsCanonicalBytes(nil)
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if string(r) != test.result {
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t.Errorf("%v: unexpected result: %s", test, r)
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}
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if exp != test.exponent {
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t.Errorf("%v: unexpected exponent: %d", test, exp)
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}
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}
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}
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