Initial commit

tournament/.exercism/config.json

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+{
+  "blurb": "Tally the results of a small football competition.",
+  "authors": [
+    "EduardoBautista"
+  ],
+  "contributors": [
+    "andrewclarkson",
+    "ashleygwilliams",
+    "ClashTheBunny",
+    "coriolinus",
+    "cwhakes",
+    "EduardoBautista",
+    "efx",
+    "ErikSchierboom",
+    "etrepum",
+    "IanWhitney",
+    "kytrinyx",
+    "lutostag",
+    "mkantor",
+    "navossoc",
+    "nfiles",
+    "petertseng",
+    "rofrol",
+    "samcday",
+    "stringparser",
+    "xakon",
+    "ZapAnton"
+  ],
+  "files": {
+    "solution": [
+      "src/lib.rs",
+      "Cargo.toml"
+    ],
+    "test": [
+      "tests/tournament.rs"
+    ],
+    "example": [
+      ".meta/example.rs"
+    ]
+  }
+}

tournament/.exercism/metadata.json

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+{"track":"rust","exercise":"tournament","id":"aafb92c191a349b0bafd436bc2dfed05","url":"https://exercism.org/tracks/rust/exercises/tournament","handle":"ArthurDanjou","is_requester":true,"auto_approve":false}

tournament/.gitignore

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+# Generated by Cargo
+# will have compiled files and executables
+/target/
+**/*.rs.bk
+
+# Remove Cargo.lock from gitignore if creating an executable, leave it for libraries
+# More information here http://doc.crates.io/guide.html#cargotoml-vs-cargolock
+Cargo.lock

tournament/Cargo.toml

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+[package]
+edition = "2021"
+name = "tournament"
+version = "1.4.0"

tournament/HELP.md

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+# Help
+
+## Running the tests
+
+Execute the tests with:
+
+```bash
+$ cargo test
+```
+
+All but the first test have been ignored. After you get the first test to
+pass, open the tests source file which is located in the `tests` directory
+and remove the `#[ignore]` flag from the next test and get the tests to pass
+again. Each separate test is a function with `#[test]` flag above it.
+Continue, until you pass every test.
+
+If you wish to run _only ignored_ tests without editing the tests source file, use:
+
+```bash
+$ cargo test -- --ignored
+```
+
+If you are using Rust 1.51 or later, you can run _all_ tests with
+
+```bash
+$ cargo test -- --include-ignored
+```
+
+To run a specific test, for example `some_test`, you can use:
+
+```bash
+$ cargo test some_test
+```
+
+If the specific test is ignored, use:
+
+```bash
+$ cargo test some_test -- --ignored
+```
+
+To learn more about Rust tests refer to the online [test documentation][rust-tests].
+
+[rust-tests]: https://doc.rust-lang.org/book/ch11-02-running-tests.html
+
+## Submitting your solution
+
+You can submit your solution using the `exercism submit src/lib.rs Cargo.toml` command.
+This command will upload your solution to the Exercism website and print the solution page's URL.
+
+It's possible to submit an incomplete solution which allows you to:
+
+- See how others have completed the exercise
+- Request help from a mentor
+
+## Need to get help?
+
+If you'd like help solving the exercise, check the following pages:
+
+- The [Rust track's documentation](https://exercism.org/docs/tracks/rust)
+- [Exercism's support channel on gitter](https://gitter.im/exercism/support)
+- The [Frequently Asked Questions](https://exercism.org/docs/using/faqs)
+
+Should those resources not suffice, you could submit your (incomplete) solution to request mentoring.
+
+## Rust Installation
+
+Refer to the [exercism help page][help-page] for Rust installation and learning
+resources.
+
+## Submitting the solution
+
+Generally you should submit all files in which you implemented your solution (`src/lib.rs` in most cases). If you are using any external crates, please consider submitting the `Cargo.toml` file. This will make the review process faster and clearer.
+
+## Feedback, Issues, Pull Requests
+
+The GitHub [track repository][github] is the home for all of the Rust exercises. If you have feedback about an exercise, or want to help implement new exercises, head over there and create an issue. Members of the rust track team are happy to help!
+
+If you want to know more about Exercism, take a look at the [contribution guide].
+
+## Submitting Incomplete Solutions
+It's possible to submit an incomplete solution so you can see how others have completed the exercise.
+
+[help-page]: https://exercism.org/tracks/rust/learning
+[github]: https://github.com/exercism/rust
+[contribution guide]: https://exercism.org/docs/community/contributors

tournament/README.md

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+# Tournament
+
+Welcome to Tournament on Exercism's Rust Track.
+If you need help running the tests or submitting your code, check out `HELP.md`.
+
+## Instructions
+
+Tally the results of a small football competition.
+
+Based on an input file containing which team played against which and what the
+outcome was, create a file with a table like this:
+
+```text
+Team                           | MP |  W |  D |  L |  P
+Devastating Donkeys            |  3 |  2 |  1 |  0 |  7
+Allegoric Alaskans             |  3 |  2 |  0 |  1 |  6
+Blithering Badgers             |  3 |  1 |  0 |  2 |  3
+Courageous Californians        |  3 |  0 |  1 |  2 |  1
+```
+
+What do those abbreviations mean?
+
+- MP: Matches Played
+- W: Matches Won
+- D: Matches Drawn (Tied)
+- L: Matches Lost
+- P: Points
+
+A win earns a team 3 points. A draw earns 1. A loss earns 0.
+
+The outcome should be ordered by points, descending. In case of a tie, teams are ordered alphabetically.
+
+## Input
+
+Your tallying program will receive input that looks like:
+
+```text
+Allegoric Alaskans;Blithering Badgers;win
+Devastating Donkeys;Courageous Californians;draw
+Devastating Donkeys;Allegoric Alaskans;win
+Courageous Californians;Blithering Badgers;loss
+Blithering Badgers;Devastating Donkeys;loss
+Allegoric Alaskans;Courageous Californians;win
+```
+
+The result of the match refers to the first team listed. So this line:
+
+```text
+Allegoric Alaskans;Blithering Badgers;win
+```
+
+means that the Allegoric Alaskans beat the Blithering Badgers.
+
+This line:
+
+```text
+Courageous Californians;Blithering Badgers;loss
+```
+
+means that the Blithering Badgers beat the Courageous Californians.
+
+And this line:
+
+```text
+Devastating Donkeys;Courageous Californians;draw
+```
+
+means that the Devastating Donkeys and Courageous Californians tied.
+
+## Source
+
+### Created by
+
+- @EduardoBautista
+
+### Contributed to by
+
+- @andrewclarkson
+- @ashleygwilliams
+- @ClashTheBunny
+- @coriolinus
+- @cwhakes
+- @EduardoBautista
+- @efx
+- @ErikSchierboom
+- @etrepum
+- @IanWhitney
+- @kytrinyx
+- @lutostag
+- @mkantor
+- @navossoc
+- @nfiles
+- @petertseng
+- @rofrol
+- @samcday
+- @stringparser
+- @xakon
+- @ZapAnton

tournament/src/lib.rs

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+extern crate core;
+
+use std::collections::HashMap;
+
+const HEADER: &str = "Team                           | MP |  W |  D |  L |  P";
+
+#[derive(Default, Eq, PartialEq)]
+struct Team {
+    name: String,
+    matches: u8,
+    wins: u8,
+    draws: u8,
+    losses: u8,
+    points: u8
+}
+
+impl Team {
+    fn new(name: String) -> Self {
+        Self {
+            name,
+            ..Default::default()
+        }
+    }
+
+    fn win(&mut self) {
+        self.wins += 1;
+        self.matches += 1;
+        self.points += 3;
+    }
+
+    fn draw(&mut self) {
+        self.draws += 1;
+        self.matches += 1;
+        self.points += 1;
+    }
+
+    fn lose(&mut self) {
+        self.losses += 1;
+        self.matches += 1;
+    }
+
+    fn add_match(&mut self, result: &MatchResult) {
+        match result {
+            MatchResult::Win => self.win(),
+            MatchResult::Draw => self.draw(),
+            MatchResult::Loss => self.lose()
+        }
+    }
+}
+
+impl From<&Team> for String {
+    fn from(team: &Team) -> String {
+        format!(
+            "{:<30} | {:>2} | {:>2} | {:>2} | {:>2} | {:>2}",
+            team.name, team.matches, team.wins, team.draws, team.losses, team.points
+        )
+    }
+}
+
+enum MatchResult {
+    Win,
+    Draw,
+    Loss
+}
+
+impl From<&str> for MatchResult {
+    fn from(result: &str) -> Self {
+        match result {
+            "win" => MatchResult::Win,
+            "draw" => MatchResult::Draw,
+            "loss" => MatchResult::Loss,
+            _ => panic!()
+        }
+    }
+}
+
+impl MatchResult {
+    fn reverse(&self) -> Self {
+        match self {
+            MatchResult::Win => MatchResult::Loss,
+            MatchResult::Draw => MatchResult::Draw,
+            MatchResult::Loss => MatchResult::Win
+        }
+    }
+}
+
+pub fn tally(match_results: &str) -> String {
+    let mut scores: HashMap<String, Team> = HashMap::new();
+    match_results.lines().for_each(|line| {
+        let frags: Vec<&str> = line.split(";").collect();
+        let home = frags[0];
+        let away = frags[1];
+        let result = frags[2].into();
+        scores
+            .entry(home.into())
+            .or_insert(Team::new(home.into()))
+            .add_match(&result);
+        scores
+            .entry(away.into())
+            .or_insert(Team::new(away.into()))
+            .add_match(&result.reverse());
+    });
+
+    let mut score_values: Vec<&Team> = scores.values().collect();
+    score_values.sort_by(|a, b| b.points.cmp(&a.points).then_with(|| a.name.cmp(&b.name)));
+
+    vec![String::from(HEADER)]
+        .into_iter()
+        .chain(score_values.into_iter().map(|t| t.into()))
+        .collect::<Vec<String>>()
+        .join("\n")
+}

tournament/tests/tournament.rs

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+#[test]
+fn just_the_header_if_no_input() {
+    let input = "";
+    let expected = "Team                           | MP |  W |  D |  L |  P";
+
+    assert_eq!(tournament::tally(input), expected);
+}
+
+#[test]
+#[ignore]
+fn a_win_is_three_points_a_loss_is_zero_points() {
+    let input = "Allegoric Alaskans;Blithering Badgers;win";
+    let expected = "".to_string()
+        + "Team                           | MP |  W |  D |  L |  P\n"
+        + "Allegoric Alaskans             |  1 |  1 |  0 |  0 |  3\n"
+        + "Blithering Badgers             |  1 |  0 |  0 |  1 |  0";
+
+    assert_eq!(tournament::tally(input), expected);
+}
+
+#[test]
+#[ignore]
+fn a_win_can_also_be_expressed_as_a_loss() {
+    let input = "Blithering Badgers;Allegoric Alaskans;loss";
+    let expected = "".to_string()
+        + "Team                           | MP |  W |  D |  L |  P\n"
+        + "Allegoric Alaskans             |  1 |  1 |  0 |  0 |  3\n"
+        + "Blithering Badgers             |  1 |  0 |  0 |  1 |  0";
+
+    assert_eq!(tournament::tally(input), expected);
+}
+
+#[test]
+#[ignore]
+fn a_different_team_can_win() {
+    let input = "Blithering Badgers;Allegoric Alaskans;win";
+    let expected = "".to_string()
+        + "Team                           | MP |  W |  D |  L |  P\n"
+        + "Blithering Badgers             |  1 |  1 |  0 |  0 |  3\n"
+        + "Allegoric Alaskans             |  1 |  0 |  0 |  1 |  0";
+
+    assert_eq!(tournament::tally(input), expected);
+}
+
+#[test]
+#[ignore]
+fn there_can_be_more_than_one_match() {
+    let input = "Allegoric Alaskans;Blithering Badgers;win\n".to_string()
+        + "Allegoric Alaskans;Blithering Badgers;win";
+    let expected = "".to_string()
+        + "Team                           | MP |  W |  D |  L |  P\n"
+        + "Allegoric Alaskans             |  2 |  2 |  0 |  0 |  6\n"
+        + "Blithering Badgers             |  2 |  0 |  0 |  2 |  0";
+
+    assert_eq!(tournament::tally(&input), expected);
+}
+
+#[test]
+#[ignore]
+fn a_draw_is_one_point_each() {
+    let input = "Allegoric Alaskans;Blithering Badgers;draw\n".to_string()
+        + "Allegoric Alaskans;Blithering Badgers;win";
+    let expected = "".to_string()
+        + "Team                           | MP |  W |  D |  L |  P\n"
+        + "Allegoric Alaskans             |  2 |  1 |  1 |  0 |  4\n"
+        + "Blithering Badgers             |  2 |  0 |  1 |  1 |  1";
+
+    assert_eq!(tournament::tally(&input), expected);
+}
+
+#[test]
+#[ignore]
+fn there_can_be_more_than_one_winner() {
+    let input = "Allegoric Alaskans;Blithering Badgers;loss\n".to_string()
+        + "Allegoric Alaskans;Blithering Badgers;win";
+    let expected = "".to_string()
+        + "Team                           | MP |  W |  D |  L |  P\n"
+        + "Allegoric Alaskans             |  2 |  1 |  0 |  1 |  3\n"
+        + "Blithering Badgers             |  2 |  1 |  0 |  1 |  3";
+
+    assert_eq!(tournament::tally(&input), expected);
+}
+
+#[test]
+#[ignore]
+fn there_can_be_more_than_two_teams() {
+    let input = "Allegoric Alaskans;Blithering Badgers;win\n".to_string()
+        + "Blithering Badgers;Courageous Californians;win\n"
+        + "Courageous Californians;Allegoric Alaskans;loss";
+    let expected = "".to_string()
+        + "Team                           | MP |  W |  D |  L |  P\n"
+        + "Allegoric Alaskans             |  2 |  2 |  0 |  0 |  6\n"
+        + "Blithering Badgers             |  2 |  1 |  0 |  1 |  3\n"
+        + "Courageous Californians        |  2 |  0 |  0 |  2 |  0";
+
+    assert_eq!(tournament::tally(&input), expected);
+}
+
+#[test]
+#[ignore]
+fn typical_input() {
+    let input = "Allegoric Alaskans;Blithering Badgers;win\n".to_string()
+        + "Devastating Donkeys;Courageous Californians;draw\n"
+        + "Devastating Donkeys;Allegoric Alaskans;win\n"
+        + "Courageous Californians;Blithering Badgers;loss\n"
+        + "Blithering Badgers;Devastating Donkeys;loss\n"
+        + "Allegoric Alaskans;Courageous Californians;win";
+    let expected = "".to_string()
+        + "Team                           | MP |  W |  D |  L |  P\n"
+        + "Devastating Donkeys            |  3 |  2 |  1 |  0 |  7\n"
+        + "Allegoric Alaskans             |  3 |  2 |  0 |  1 |  6\n"
+        + "Blithering Badgers             |  3 |  1 |  0 |  2 |  3\n"
+        + "Courageous Californians        |  3 |  0 |  1 |  2 |  1";
+
+    assert_eq!(tournament::tally(&input), expected);
+}
+
+#[test]
+#[ignore]
+fn incomplete_competition_not_all_pairs_have_played() {
+    let input = "Allegoric Alaskans;Blithering Badgers;loss\n".to_string()
+        + "Devastating Donkeys;Allegoric Alaskans;loss\n"
+        + "Courageous Californians;Blithering Badgers;draw\n"
+        + "Allegoric Alaskans;Courageous Californians;win";
+    let expected = "".to_string()
+        + "Team                           | MP |  W |  D |  L |  P\n"
+        + "Allegoric Alaskans             |  3 |  2 |  0 |  1 |  6\n"
+        + "Blithering Badgers             |  2 |  1 |  1 |  0 |  4\n"
+        + "Courageous Californians        |  2 |  0 |  1 |  1 |  1\n"
+        + "Devastating Donkeys            |  1 |  0 |  0 |  1 |  0";
+
+    assert_eq!(tournament::tally(&input), expected);
+}
+
+#[test]
+#[ignore]
+fn ties_broken_alphabetically() {
+    let input = "Courageous Californians;Devastating Donkeys;win\n".to_string()
+        + "Allegoric Alaskans;Blithering Badgers;win\n"
+        + "Devastating Donkeys;Allegoric Alaskans;loss\n"
+        + "Courageous Californians;Blithering Badgers;win\n"
+        + "Blithering Badgers;Devastating Donkeys;draw\n"
+        + "Allegoric Alaskans;Courageous Californians;draw";
+    let expected = "".to_string()
+        + "Team                           | MP |  W |  D |  L |  P\n"
+        + "Allegoric Alaskans             |  3 |  2 |  1 |  0 |  7\n"
+        + "Courageous Californians        |  3 |  2 |  1 |  0 |  7\n"
+        + "Blithering Badgers             |  3 |  0 |  1 |  2 |  1\n"
+        + "Devastating Donkeys            |  3 |  0 |  1 |  2 |  1";
+
+    assert_eq!(tournament::tally(&input), expected);
+}