Compare commits
5 Commits
Author | SHA1 | Date | |
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61414ff5bf | ||
713f70041b | |||
a23e5f80f0 | |||
99eeeedc65 | |||
c73fa4e72b |
4
.github/workflows/build_release.yaml
vendored
4
.github/workflows/build_release.yaml
vendored
@ -17,9 +17,9 @@ jobs:
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with:
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go-version: '>=1.22.1'
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- name: release-build-windows
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run: GOOS=windows GOARCH=amd64 go build -o bin/collatz-${{ github.ref_name }}-windows-amd64.exe
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run: GOOS=windows GOARCH=amd64 go build -ldflags "-s -w" -o bin/collatz-${{ github.ref_name }}-windows-amd64.exe
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- name: release-build-linux
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run: GOOS=linux GOARCH=amd64 go build -o bin/collatz-${{ github.ref_name }}-linux-amd64
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run: GOOS=linux GOARCH=amd64 go build -ldflags "-s -w" -o bin/collatz-${{ github.ref_name }}-linux-amd64
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- name: Release
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uses: https://gitea.com/actions/release-action@main
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with:
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22
.github/workflows/run_tests.yaml
vendored
Normal file
22
.github/workflows/run_tests.yaml
vendored
Normal file
@ -0,0 +1,22 @@
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name: Run Tests
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on:
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push:
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branches: [ main ]
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pull_request:
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branches: [ main ]
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jobs:
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test:
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runs-on: ubuntu-latest
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steps:
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- name: Check out code
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uses: actions/checkout@v2
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- name: Set up Go
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uses: actions/setup-go@v2
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with:
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go-version: '^1.22.1'
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- name: Run tests
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run: go test ./...
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1
.gitignore
vendored
Normal file
1
.gitignore
vendored
Normal file
@ -0,0 +1 @@
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.idea
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1
README.md
Normal file
1
README.md
Normal file
@ -0,0 +1 @@
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Run with `go run collatz.go 1234` or download the executable and pass a number `collatz 1234`.
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30
collatz.go
30
collatz.go
@ -2,10 +2,34 @@ package main
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import (
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"collatz/collatz"
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"collatz/io"
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"collatz/parsing"
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"log"
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"strings"
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)
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func main() {
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calculator := collatz.NewCalculator(new(io.Cliargs))
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calculator.Collatz()
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sequence, err := runCollatz()
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if err != nil {
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log.Fatalf("Error calculating Collatz: %v", err)
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}
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printSequence(sequence)
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}
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func printSequence(sequence collatz.Sequence) {
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builder := new(strings.Builder)
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log.Printf("Collatz sequence with %d iterations:", sequence.Iterations)
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for i, num := range sequence.Sequence {
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if i != 0 {
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builder.WriteString("\n-> ")
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}
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builder.WriteString(num.String())
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}
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log.Println(builder.String())
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}
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func runCollatz() (collatz.Sequence, error) {
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parser := new(parsing.Cliargs)
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calculator := collatz.NewCalculator(parser)
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sequence, err := calculator.CalculateCollatz()
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return sequence, err
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}
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@ -1,53 +1,61 @@
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package collatz
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import (
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"collatz/io"
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"collatz/parsing"
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"fmt"
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"log"
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"math/big"
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)
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type Calculator struct {
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parser *io.Cliargs
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parser parsing.Parser
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three *big.Int
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two *big.Int
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one *big.Int
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sequence Sequence
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}
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type Sequence struct {
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Iterations int
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Sequence []*big.Int
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}
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func NewCalculator(parser *io.Cliargs) Calculator {
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r := Calculator{
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func NewCalculator(parser parsing.Parser) *Calculator {
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r := &Calculator{
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parser: parser,
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three: new(big.Int).SetInt64(3),
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two: new(big.Int).SetInt64(2),
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one: new(big.Int).SetInt64(1),
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three: big.NewInt(3),
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two: big.NewInt(2),
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one: big.NewInt(1),
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}
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return r
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}
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func (o Calculator) Collatz() {
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number, err := o.parser.Parse()
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func (calc *Calculator) CalculateCollatz() (Sequence, error) {
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number, err := calc.parser.Parse()
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if err != nil {
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log.Panicf("Couldn't parse input: %s\n", err)
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return Sequence{}, fmt.Errorf("couldn't parse input: %w", err)
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}
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fmt.Print(number.Text(10))
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o.nextNumber(number)
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fmt.Println()
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calc.sequence = Sequence{Iterations: 0}
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calc.sequence.Sequence = append(calc.sequence.Sequence, new(big.Int).Set(number))
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err = calc.calculateNextCollatzNumber(*number)
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if err != nil {
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return Sequence{}, err
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}
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return calc.sequence, nil
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}
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func (o Calculator) nextNumber(in *big.Int) {
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if in.Cmp(o.one) < 0 {
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log.Panicln("Must be greater than 0")
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func (calc *Calculator) calculateNextCollatzNumber(in big.Int) error {
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if in.Cmp(calc.one) < 0 {
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return fmt.Errorf("must be greater than 0")
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}
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if in.Cmp(o.one) == 0 {
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return
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if in.Cmp(calc.one) == 0 {
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return nil
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}
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var newNumber *big.Int
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if new(big.Int).And(in, o.one).Cmp(o.one) == 0 {
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newNumber = new(big.Int).Add(new(big.Int).Mul(in, o.three), o.one)
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if new(big.Int).And(&in, calc.one).Cmp(calc.one) == 0 {
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newNumber = new(big.Int).Add(new(big.Int).Mul(&in, calc.three), calc.one)
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} else {
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newNumber = new(big.Int).Div(in, o.two)
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newNumber = new(big.Int).Div(&in, calc.two)
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}
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fmt.Printf(" -> %s", newNumber.Text(10))
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o.nextNumber(newNumber)
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calc.sequence.Iterations++
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calc.sequence.Sequence = append(calc.sequence.Sequence, newNumber)
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return calc.calculateNextCollatzNumber(*newNumber)
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}
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48
collatz/calculator_test.go
Normal file
48
collatz/calculator_test.go
Normal file
@ -0,0 +1,48 @@
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package collatz
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import (
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"math/big"
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"testing"
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)
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type MockParser struct {
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value *big.Int
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}
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func (m *MockParser) Parse() (*big.Int, error) {
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return m.value, nil
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}
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func TestNewCalculator(t *testing.T) {
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parser := &MockParser{}
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calculator := NewCalculator(parser)
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if calculator.parser != parser {
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t.Errorf("Expected parser to be %v, got %v", parser, calculator.parser)
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}
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if calculator.one.Cmp(big.NewInt(1)) != 0 {
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t.Errorf("Expected one to be 1, got %v", calculator.one)
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}
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if calculator.two.Cmp(big.NewInt(2)) != 0 {
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t.Errorf("Expected two to be 2, got %v", calculator.two)
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}
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if calculator.three.Cmp(big.NewInt(3)) != 0 {
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t.Errorf("Expected three to be 3, got %v", calculator.three)
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}
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}
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func TestCalculateCollatz(t *testing.T) {
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parser := &MockParser{value: big.NewInt(6)}
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calculator := NewCalculator(parser)
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sequence, err := calculator.CalculateCollatz()
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if err != nil {
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t.Errorf("Expected no error, got %v", err)
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}
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if sequence.Iterations != 8 {
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t.Errorf("Expected 8 iterations, got %v", sequence.Iterations)
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}
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}
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@ -1,4 +1,4 @@
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package io
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package parsing
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import (
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"errors"
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@ -7,7 +7,6 @@ import (
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)
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type Cliargs struct {
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value *big.Int
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}
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func (arg *Cliargs) Parse() (*big.Int, error) {
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@ -19,10 +18,5 @@ func (arg *Cliargs) Parse() (*big.Int, error) {
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if !success {
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return nil, errors.New("argument is not an integer")
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}
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arg.value = num
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return num, nil
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}
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func (arg *Cliargs) GetNumber() *big.Int {
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return arg.value
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}
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44
parsing/cliargs_test.go
Normal file
44
parsing/cliargs_test.go
Normal file
@ -0,0 +1,44 @@
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package parsing
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import (
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"math/big"
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"os"
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"testing"
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)
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func TestCliargs_Parse(t *testing.T) {
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tests := []struct {
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name string
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args []string
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want *big.Int
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wantErr bool
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}{
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{
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name: "Test with valid integer",
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args: []string{"", "10"}, // the first argument is the program name
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want: big.NewInt(10),
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wantErr: false,
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},
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{
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name: "Test with non-integer",
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args: []string{"", "abc"}, // the first argument is the program name
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want: nil,
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wantErr: true,
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},
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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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os.Args = tt.args
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parser := &Cliargs{}
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got, err := parser.Parse()
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if (err != nil) != tt.wantErr {
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t.Errorf("Parse() error = %v, wantErr %v", err, tt.wantErr)
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return
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}
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if !tt.wantErr && got.Cmp(tt.want) != 0 {
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t.Errorf("Parse() = %v, want %v", got, tt.want)
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}
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})
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}
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}
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7
parsing/interface.go
Normal file
7
parsing/interface.go
Normal file
@ -0,0 +1,7 @@
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package parsing
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import "math/big"
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type Parser interface {
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Parse() (*big.Int, error)
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}
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Loading…
Reference in New Issue
Block a user