From edd3307a9a4340268dcddfce12daee8b15d178f4 Mon Sep 17 00:00:00 2001 From: Alvin Sng Date: Thu, 17 Dec 2020 17:35:29 -0800 Subject: [PATCH] Create HelloWorld test program --- .gitignore | 5 + README.md | 18 +- eng-debugging/hello_world_java/README.md | 24 + eng-debugging/hello_world_java/pom.xml | 37 + .../src/main/java/HelloWorld.java | 27 + .../src/main/resources/input/test_1.txt | 1 + .../src/main/resources/input/test_2.txt | 1 + .../src/test/java/HelloWorldTest.java | 25 + .../hello_world_javascript/README.md | 10 + .../hello_world_javascript/input/test_1.txt | 1 + .../hello_world_javascript/input/test_2.txt | 1 + .../hello_world_javascript/lib/index.js | 19 + .../hello_world_javascript/package-lock.json | 737 ++++++++++++++++++ .../hello_world_javascript/package.json | 19 + .../specs/index.spec.js | 16 + eng-debugging/hello_world_python/README.md | 13 + .../hello_world_python/input/test_1.txt | 1 + .../hello_world_python/input/test_2.txt | 1 + .../hello_world_python/lib/__init__.py | 0 eng-debugging/hello_world_python/lib/index.py | 11 + .../test/hello_world_test.py | 13 + 21 files changed, 978 insertions(+), 2 deletions(-) create mode 100644 .gitignore create mode 100644 eng-debugging/hello_world_java/README.md create mode 100644 eng-debugging/hello_world_java/pom.xml create mode 100644 eng-debugging/hello_world_java/src/main/java/HelloWorld.java create mode 100644 eng-debugging/hello_world_java/src/main/resources/input/test_1.txt create mode 100644 eng-debugging/hello_world_java/src/main/resources/input/test_2.txt create mode 100644 eng-debugging/hello_world_java/src/test/java/HelloWorldTest.java create mode 100644 eng-debugging/hello_world_javascript/README.md create mode 100644 eng-debugging/hello_world_javascript/input/test_1.txt create mode 100644 eng-debugging/hello_world_javascript/input/test_2.txt create mode 100644 eng-debugging/hello_world_javascript/lib/index.js create mode 100644 eng-debugging/hello_world_javascript/package-lock.json create mode 100644 eng-debugging/hello_world_javascript/package.json create mode 100644 eng-debugging/hello_world_javascript/specs/index.spec.js create mode 100755 eng-debugging/hello_world_python/README.md create mode 100755 eng-debugging/hello_world_python/input/test_1.txt create mode 100755 eng-debugging/hello_world_python/input/test_2.txt create mode 100644 eng-debugging/hello_world_python/lib/__init__.py create mode 100755 eng-debugging/hello_world_python/lib/index.py create mode 100755 eng-debugging/hello_world_python/test/hello_world_test.py diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..d86fe4d --- /dev/null +++ b/.gitignore @@ -0,0 +1,5 @@ +target/ +node_modules/ +__pycache__/ +.pytest_cache/ +.DS_Store diff --git a/README.md b/README.md index 8a768ea..a36d8d4 100644 --- a/README.md +++ b/README.md @@ -1,2 +1,16 @@ -# public-interview -Public interview files for candidates +# Brex Eng Debugging Interview Sample +This "Hello World" program is provided for upcoming Brex candidates to verify their local development setup works before their debugging interview. + +## Languages +We currently support 3 programming languages (Java, Python & Javascript) for this interview. You should pick the language you are most comfortable with. For each language folder, you'll find a README.md with setup instructions on how to install the necessary programs to run the code. You will be allowed to lookup online documentation for help on language syntax during the interview. + +## The "Hello World" program +The "Hello World" program reads a file and returns it to caller. The program will has 2 unit tests (1 passing, 1 failing). You should check that both unit tests run and that you're able to fix the 2nd unit test. + +## Preparing for your interview +On the day of your interview, your interviewer will be sending you a zip file that contains the code for the buggy program. You'll be using your own computer to run the program and fix it. You may use any text editor or IDE to assist in solving the bugs. You can add print statements or change the code to help with finding the bug. + +You can also use a debugger as well to set breakpoints to further debug the program. However, it is not recommended to use a debugger if you're new to it. The program can be solved with just using print statements. + +## Questions +If you have any other questions about this interview, feel free to reach out to your recruiter. diff --git a/eng-debugging/hello_world_java/README.md b/eng-debugging/hello_world_java/README.md new file mode 100644 index 0000000..9e21ea1 --- /dev/null +++ b/eng-debugging/hello_world_java/README.md @@ -0,0 +1,24 @@ +### Setup +1. If you don't have JDK 8+ installed, run `brew cask install adoptopenjdk8`/`sudo apt-get install openjdk-8-jre`/`sudo yum install java-1.8.0-openjdk-devel`. Verify using `java -version`. If you get an error `Error: Cask 'adoptopenjdk8' is unavailable: No Cask with this name exists.`, first run `brew update` followed by `brew tap adoptopenjdk/openjdk` (more on mac installation [here](https://mkyong.com/java/how-to-install-java-on-mac-osx/)) +2. Install Maven using `brew install maven`/`sudo apt install maven`/`sudo yum install maven`. Verify using `mvn -version`. +3. run `mvn install` inside this folder. This will run the tests too. +4. run `mvn test` to run all unit tests. +5. You can use a Java IDE of your choice to run and debug the tests. + +--------------------------------------- + +#### IDE/Windows-specific bugs (skip unless you're having problems on Windows or with your IDE): +Make sure you have completed setup before proceeding! + +IntelliJ: +- Error: `java: package org.apache.commons.lang3 does not exist` + - Right-click `pom.xml` in the directory window > "Add as Maven Project"; this should reload the project with `org.apache.commons:commons-lang3:3.10` as a dependency now. +- Error: `java: cannot access ` + - File > Invalidate Caches / Restart... + +Visual Studio Code/Windows: +- `JAVA_HOME` not updating + - Quit ALL VSCode windows, otherwise machine might not pick up updated `JAVA_HOME` +- VSCode Maven extension is not enough + - Install in your home subdirectory - instructions: https://maven.apache.org/install.html + - Update Windows PATH to include that subdirectory diff --git a/eng-debugging/hello_world_java/pom.xml b/eng-debugging/hello_world_java/pom.xml new file mode 100644 index 0000000..e91ffff --- /dev/null +++ b/eng-debugging/hello_world_java/pom.xml @@ -0,0 +1,37 @@ + + + 4.0.0 + + org.brexhq + hello_world_java + 1.0-SNAPSHOT + + + + org.apache.maven.plugins + maven-compiler-plugin + + 8 + 8 + + + + + + + + junit + junit + 4.13 + test + + + org.apache.commons + commons-lang3 + 3.10 + + + + diff --git a/eng-debugging/hello_world_java/src/main/java/HelloWorld.java b/eng-debugging/hello_world_java/src/main/java/HelloWorld.java new file mode 100644 index 0000000..c90c4ff --- /dev/null +++ b/eng-debugging/hello_world_java/src/main/java/HelloWorld.java @@ -0,0 +1,27 @@ +import java.io.File; +import java.io.IOException; +import java.net.URL; +import java.nio.charset.StandardCharsets; +import java.nio.file.Files; +import java.nio.file.Paths; +import java.util.List; + +public class HelloWorld { + private final String filePath; + + HelloWorld(String filePath) { + this.filePath = filePath; + } + + public String loadFile() throws IOException { + URL file = this.getClass().getClassLoader().getResource(filePath); + String path = new File(file.getPath()).getAbsolutePath(); + return new String(Files.readAllBytes(Paths.get(path)), StandardCharsets.UTF_8); + } + + public String run() throws IOException { + String contents = loadFile(); + // To fix test case 2, change the line below. + return contents.replace('_', ' '); + } +} diff --git a/eng-debugging/hello_world_java/src/main/resources/input/test_1.txt b/eng-debugging/hello_world_java/src/main/resources/input/test_1.txt new file mode 100644 index 0000000..3b18e51 --- /dev/null +++ b/eng-debugging/hello_world_java/src/main/resources/input/test_1.txt @@ -0,0 +1 @@ +hello world diff --git a/eng-debugging/hello_world_java/src/main/resources/input/test_2.txt b/eng-debugging/hello_world_java/src/main/resources/input/test_2.txt new file mode 100644 index 0000000..242c034 --- /dev/null +++ b/eng-debugging/hello_world_java/src/main/resources/input/test_2.txt @@ -0,0 +1 @@ +hello_world diff --git a/eng-debugging/hello_world_java/src/test/java/HelloWorldTest.java b/eng-debugging/hello_world_java/src/test/java/HelloWorldTest.java new file mode 100644 index 0000000..3a4e8da --- /dev/null +++ b/eng-debugging/hello_world_java/src/test/java/HelloWorldTest.java @@ -0,0 +1,25 @@ +import org.junit.Test; + +import java.io.IOException; +import java.util.Arrays; +import java.util.List; + +import static org.junit.Assert.assertEquals; + +public class HelloWorldTest { + @Test + public void testCase1() throws IOException { + // This test case is passing + HelloWorld helloWorld = new HelloWorld("input/test_1.txt"); + String actualOutput = helloWorld.run(); + assertEquals("hello world\n", actualOutput); + } + + @Test + public void testCase2() throws IOException { + // This test case is failing + HelloWorld helloWorld = new HelloWorld("input/test_2.txt"); + String actualOutput = helloWorld.run(); + assertEquals("hello-world\n", actualOutput); + } +} diff --git a/eng-debugging/hello_world_javascript/README.md b/eng-debugging/hello_world_javascript/README.md new file mode 100644 index 0000000..de464fc --- /dev/null +++ b/eng-debugging/hello_world_javascript/README.md @@ -0,0 +1,10 @@ +### Setup +1. If you don't have nodejs installed, run `brew install node` for Mac. See https://nodejs.org/en/download/ for other OS +2. run `npm install` inside this folder +3. run `npm test` to run all unit tests +4. run `npm run test-only 1` to just run the first test + + +## Tested on +node v12.6.0 +npm v6.13.2 diff --git a/eng-debugging/hello_world_javascript/input/test_1.txt b/eng-debugging/hello_world_javascript/input/test_1.txt new file mode 100644 index 0000000..3b18e51 --- /dev/null +++ b/eng-debugging/hello_world_javascript/input/test_1.txt @@ -0,0 +1 @@ +hello world diff --git a/eng-debugging/hello_world_javascript/input/test_2.txt b/eng-debugging/hello_world_javascript/input/test_2.txt new file mode 100644 index 0000000..242c034 --- /dev/null +++ b/eng-debugging/hello_world_javascript/input/test_2.txt @@ -0,0 +1 @@ +hello_world diff --git a/eng-debugging/hello_world_javascript/lib/index.js b/eng-debugging/hello_world_javascript/lib/index.js new file mode 100644 index 0000000..06869f3 --- /dev/null +++ b/eng-debugging/hello_world_javascript/lib/index.js @@ -0,0 +1,19 @@ +const fs = require('fs'); + +class HelloWorld { + constructor(filePath) { + this.filePath = filePath; + } + + loadFile(cb) { + return fs.readFileSync(this.filePath, 'utf8'); + } + + run() { + const contents = this.loadFile(); + // to fix test case 2, fix line below: + return contents.replace('_', ' '); + } +} + +module.exports = HelloWorld; diff --git a/eng-debugging/hello_world_javascript/package-lock.json b/eng-debugging/hello_world_javascript/package-lock.json new file mode 100644 index 0000000..f2d0266 --- /dev/null +++ b/eng-debugging/hello_world_javascript/package-lock.json @@ -0,0 +1,737 @@ +{ + "name": "javascript", + "version": "1.1.3", + "lockfileVersion": 1, + "requires": true, + "dependencies": { + "ansi-colors": { + "version": "3.2.3", + "resolved": "https://registry.npmjs.org/ansi-colors/-/ansi-colors-3.2.3.tgz", + "integrity": "sha512-LEHHyuhlPY3TmuUYMh2oz89lTShfvgbmzaBcxve9t/9Wuy7Dwf4yoAKcND7KFT1HAQfqZ12qtc+DUrBMeKF9nw==" + }, + "ansi-regex": { + 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'specs/index.spec.js' -f", + "test-solution": "NODE_ENV=test SOLUTION_MODE=1 mocha 'specs/index.spec.js'" + }, + "author": "", + "license": "ISC", + "dependencies": { + "chai": "^4.2.0", + "mocha": "^6.2.2" + } +} diff --git a/eng-debugging/hello_world_javascript/specs/index.spec.js b/eng-debugging/hello_world_javascript/specs/index.spec.js new file mode 100644 index 0000000..2d45017 --- /dev/null +++ b/eng-debugging/hello_world_javascript/specs/index.spec.js @@ -0,0 +1,16 @@ +const expect = require('chai').expect +let HelloWorld = require('../lib/index.js'); + +describe('HelloWorld', () => { + it('passes case 1', () => { + // this test is passing + const helloWorld = new HelloWorld('./input/test_1.txt'); + expect(helloWorld.run()).to.eql("hello world\n"); + }); + + it('passes case 2', () => { + // this test is failing + const helloWorld = new HelloWorld('./input/test_2.txt'); + expect(helloWorld.run()).to.eql("hello-world\n"); + }); +}); diff --git a/eng-debugging/hello_world_python/README.md b/eng-debugging/hello_world_python/README.md new file mode 100755 index 0000000..2ed6e1f --- /dev/null +++ b/eng-debugging/hello_world_python/README.md @@ -0,0 +1,13 @@ +### Setup +1. If you don't have Python 3 installed, run `brew install python` (for Mac) +2. Run `pip3 install pytest` if you don't have pytest already installed. +3. Run `PYTHONPATH=. pytest test -vv` to run all tests +4. Run `PYTHONPATH=. pytest test -vv -k 'test_case_one'` to run just the first test + +**Windows instructions** +If using the Command Prompt (CMD), then set the PYTHONPATH with `set PYTHONPATH=%PYTHONPATH%;.` +If using Powershell, then set the PYTHONPATH with `$env:PYTHONPATH = "."` +After setting the path, run tests with `pytest test -vv` + +## Tested on +Python 3.7.4 diff --git a/eng-debugging/hello_world_python/input/test_1.txt b/eng-debugging/hello_world_python/input/test_1.txt new file mode 100755 index 0000000..3b18e51 --- /dev/null +++ b/eng-debugging/hello_world_python/input/test_1.txt @@ -0,0 +1 @@ +hello world diff --git a/eng-debugging/hello_world_python/input/test_2.txt b/eng-debugging/hello_world_python/input/test_2.txt new file mode 100755 index 0000000..242c034 --- /dev/null +++ b/eng-debugging/hello_world_python/input/test_2.txt @@ -0,0 +1 @@ +hello_world diff --git a/eng-debugging/hello_world_python/lib/__init__.py b/eng-debugging/hello_world_python/lib/__init__.py new file mode 100644 index 0000000..e69de29 diff --git a/eng-debugging/hello_world_python/lib/index.py b/eng-debugging/hello_world_python/lib/index.py new file mode 100755 index 0000000..51e6be0 --- /dev/null +++ b/eng-debugging/hello_world_python/lib/index.py @@ -0,0 +1,11 @@ +class HelloWorld: + def __init__(self, file_path: str): + self.file_path = file_path + + def _load_file(self): + with open(self.file_path, "r", encoding="utf8") as f: + return f.read() + + def run(self): + contents = self._load_file() + return contents.replace("_", " ") diff --git a/eng-debugging/hello_world_python/test/hello_world_test.py b/eng-debugging/hello_world_python/test/hello_world_test.py new file mode 100755 index 0000000..1bc96b2 --- /dev/null +++ b/eng-debugging/hello_world_python/test/hello_world_test.py @@ -0,0 +1,13 @@ +import pytest +import os +from lib.index import HelloWorld +input_folder = "input/" + +def test_case_one(): + hello_world = HelloWorld(input_folder + "test_1.txt") + assert hello_world.run() == "hello world\n" + + +def test_case_two(): + hello_world = HelloWorld(input_folder + "test_2.txt") + assert hello_world.run() == "hello-world\n"