246 lines
7.7 KiB
Go
246 lines
7.7 KiB
Go
// Copyright 2018 Google LLC
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//
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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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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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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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package money
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import (
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"fmt"
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"reflect"
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"testing"
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pb "github.com/GoogleCloudPlatform/microservices-demo/src/frontend/genproto"
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)
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func mmc(u int64, n int32, c string) pb.Money { return pb.Money{Units: u, Nanos: n, CurrencyCode: c} }
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func mm(u int64, n int32) pb.Money { return mmc(u, n, "") }
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func TestIsValid(t *testing.T) {
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tests := []struct {
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name string
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in pb.Money
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want bool
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}{
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{"valid -/-", mm(-981273891273, -999999999), true},
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{"invalid -/+", mm(-981273891273, +999999999), false},
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{"valid +/+", mm(981273891273, 999999999), true},
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{"invalid +/-", mm(981273891273, -999999999), false},
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{"invalid +/+overflow", mm(3, 1000000000), false},
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{"invalid +/-overflow", mm(3, -1000000000), false},
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{"invalid -/+overflow", mm(-3, 1000000000), false},
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{"invalid -/-overflow", mm(-3, -1000000000), false},
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}
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for _, tt := range tests {
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t.Run(tt.name, func(t *testing.T) {
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if got := IsValid(tt.in); got != tt.want {
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t.Errorf("IsValid(%v) = %v, want %v", tt.in, got, tt.want)
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}
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})
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}
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}
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func TestIsZero(t *testing.T) {
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tests := []struct {
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name string
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in pb.Money
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want bool
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}{
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{"zero", mm(0, 0), true},
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{"not-zero (-/+)", mm(-1, +1), false},
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{"not-zero (-/-)", mm(-1, -1), false},
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{"not-zero (+/+)", mm(+1, +1), false},
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{"not-zero (+/-)", mm(+1, -1), false},
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}
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for _, tt := range tests {
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t.Run(tt.name, func(t *testing.T) {
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if got := IsZero(tt.in); got != tt.want {
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t.Errorf("IsZero(%v) = %v, want %v", tt.in, got, tt.want)
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}
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})
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}
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}
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func TestIsPositive(t *testing.T) {
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tests := []struct {
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name string
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in pb.Money
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want bool
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}{
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{"zero", mm(0, 0), false},
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{"positive (+/+)", mm(+1, +1), true},
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{"invalid (-/+)", mm(-1, +1), false},
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{"negative (-/-)", mm(-1, -1), false},
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{"invalid (+/-)", mm(+1, -1), false},
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}
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for _, tt := range tests {
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t.Run(tt.name, func(t *testing.T) {
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if got := IsPositive(tt.in); got != tt.want {
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t.Errorf("IsPositive(%v) = %v, want %v", tt.in, got, tt.want)
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}
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})
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}
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}
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func TestIsNegative(t *testing.T) {
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tests := []struct {
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name string
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in pb.Money
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want bool
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}{
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{"zero", mm(0, 0), false},
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{"positive (+/+)", mm(+1, +1), false},
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{"invalid (-/+)", mm(-1, +1), false},
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{"negative (-/-)", mm(-1, -1), true},
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{"invalid (+/-)", mm(+1, -1), false},
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}
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for _, tt := range tests {
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t.Run(tt.name, func(t *testing.T) {
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if got := IsNegative(tt.in); got != tt.want {
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t.Errorf("IsNegative(%v) = %v, want %v", tt.in, got, tt.want)
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}
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})
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}
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}
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func TestAreSameCurrency(t *testing.T) {
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type args struct {
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l pb.Money
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r pb.Money
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}
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tests := []struct {
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name string
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args args
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want bool
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}{
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{"both empty currency", args{mmc(1, 0, ""), mmc(2, 0, "")}, false},
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{"left empty currency", args{mmc(1, 0, ""), mmc(2, 0, "USD")}, false},
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{"right empty currency", args{mmc(1, 0, "USD"), mmc(2, 0, "")}, false},
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{"mismatching", args{mmc(1, 0, "USD"), mmc(2, 0, "CAD")}, false},
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{"matching", args{mmc(1, 0, "USD"), mmc(2, 0, "USD")}, true},
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}
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for _, tt := range tests {
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t.Run(tt.name, func(t *testing.T) {
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if got := AreSameCurrency(tt.args.l, tt.args.r); got != tt.want {
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t.Errorf("AreSameCurrency([%v],[%v]) = %v, want %v", tt.args.l, tt.args.r, got, tt.want)
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}
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})
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}
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}
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func TestAreEquals(t *testing.T) {
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type args struct {
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l pb.Money
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r pb.Money
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}
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tests := []struct {
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name string
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args args
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want bool
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}{
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{"equals", args{mmc(1, 2, "USD"), mmc(1, 2, "USD")}, true},
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{"mismatching currency", args{mmc(1, 2, "USD"), mmc(1, 2, "CAD")}, false},
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{"mismatching units", args{mmc(10, 20, "USD"), mmc(1, 20, "USD")}, false},
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{"mismatching nanos", args{mmc(1, 2, "USD"), mmc(1, 20, "USD")}, false},
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{"negated", args{mmc(1, 2, "USD"), mmc(-1, -2, "USD")}, false},
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}
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for _, tt := range tests {
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t.Run(tt.name, func(t *testing.T) {
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if got := AreEquals(tt.args.l, tt.args.r); got != tt.want {
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t.Errorf("AreEquals([%v],[%v]) = %v, want %v", tt.args.l, tt.args.r, got, tt.want)
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}
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})
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}
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}
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func TestNegate(t *testing.T) {
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tests := []struct {
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name string
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in pb.Money
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want pb.Money
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}{
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{"zero", mm(0, 0), mm(0, 0)},
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{"negative", mm(-1, -200), mm(1, 200)},
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{"positive", mm(1, 200), mm(-1, -200)},
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{"carries currency code", mmc(0, 0, "XXX"), mmc(0, 0, "XXX")},
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}
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for _, tt := range tests {
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t.Run(tt.name, func(t *testing.T) {
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if got := Negate(tt.in); !AreEquals(got, tt.want) {
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t.Errorf("Negate([%v]) = %v, want %v", tt.in, got, tt.want)
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}
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})
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}
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}
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func TestMust_pass(t *testing.T) {
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v := Must(mm(2, 3), nil)
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if !AreEquals(v, mm(2, 3)) {
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t.Errorf("returned the wrong value: %v", v)
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}
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}
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func TestMust_panic(t *testing.T) {
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defer func() {
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if r := recover(); r != nil {
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t.Logf("panic captured: %v", r)
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}
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}()
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Must(mm(2, 3), fmt.Errorf("some error"))
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t.Fatal("this should not have executed due to the panic above")
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}
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func TestSum(t *testing.T) {
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type args struct {
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l pb.Money
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r pb.Money
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}
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tests := []struct {
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name string
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args args
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want pb.Money
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wantErr error
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}{
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{"0+0=0", args{mm(0, 0), mm(0, 0)}, mm(0, 0), nil},
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{"Error: currency code on left", args{mmc(0, 0, "XXX"), mm(0, 0)}, mm(0, 0), ErrMismatchingCurrency},
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{"Error: currency code on right", args{mm(0, 0), mmc(0, 0, "YYY")}, mm(0, 0), ErrMismatchingCurrency},
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{"Error: currency code mismatch", args{mmc(0, 0, "AAA"), mmc(0, 0, "BBB")}, mm(0, 0), ErrMismatchingCurrency},
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{"Error: invalid +/-", args{mm(+1, -1), mm(0, 0)}, mm(0, 0), ErrInvalidValue},
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{"Error: invalid -/+", args{mm(0, 0), mm(-1, +2)}, mm(0, 0), ErrInvalidValue},
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{"Error: invalid nanos", args{mm(0, 1000000000), mm(1, 0)}, mm(0, 0), ErrInvalidValue},
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{"both positive (no carry)", args{mm(2, 200000000), mm(2, 200000000)}, mm(4, 400000000), nil},
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{"both positive (nanos=max)", args{mm(2, 111111111), mm(2, 888888888)}, mm(4, 999999999), nil},
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{"both positive (carry)", args{mm(2, 200000000), mm(2, 900000000)}, mm(5, 100000000), nil},
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{"both negative (no carry)", args{mm(-2, -200000000), mm(-2, -200000000)}, mm(-4, -400000000), nil},
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{"both negative (carry)", args{mm(-2, -200000000), mm(-2, -900000000)}, mm(-5, -100000000), nil},
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{"mixed (larger positive, just decimals)", args{mm(11, 0), mm(-2, 0)}, mm(9, 0), nil},
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{"mixed (larger negative, just decimals)", args{mm(-11, 0), mm(2, 0)}, mm(-9, 0), nil},
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{"mixed (larger positive, no borrow)", args{mm(11, 100000000), mm(-2, -100000000)}, mm(9, 0), nil},
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{"mixed (larger positive, with borrow)", args{mm(11, 100000000), mm(-2, -9000000 /*.09*/)}, mm(9, 91000000 /*.091*/), nil},
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{"mixed (larger negative, no borrow)", args{mm(-11, -100000000), mm(2, 100000000)}, mm(-9, 0), nil},
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{"mixed (larger negative, with borrow)", args{mm(-11, -100000000), mm(2, 9000000 /*.09*/)}, mm(-9, -91000000 /*.091*/), nil},
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{"0+negative", args{mm(0, 0), mm(-2, -100000000)}, mm(-2, -100000000), nil},
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{"negative+0", args{mm(-2, -100000000), mm(0, 0)}, mm(-2, -100000000), nil},
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}
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for _, tt := range tests {
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t.Run(tt.name, func(t *testing.T) {
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got, err := Sum(tt.args.l, tt.args.r)
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if err != tt.wantErr {
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t.Errorf("Sum([%v],[%v]): expected err=\"%v\" got=\"%v\"", tt.args.l, tt.args.r, tt.wantErr, err)
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}
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if !reflect.DeepEqual(got, tt.want) {
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t.Errorf("Sum([%v],[%v]) = %v, want %v", tt.args.l, tt.args.r, got, tt.want)
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}
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})
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}
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}
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