diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..3348a20 --- /dev/null +++ b/.gitignore @@ -0,0 +1,42 @@ +.gradle +build/ +!gradle/wrapper/gradle-wrapper.jar +!**/src/main/**/build/ +!**/src/test/**/build/ + +### IntelliJ IDEA ### +.idea/modules.xml +.idea/jarRepositories.xml +.idea/compiler.xml +.idea/libraries/ +*.iws +*.iml +*.ipr +out/ +!**/src/main/**/out/ +!**/src/test/**/out/ + +### Eclipse ### +.apt_generated +.classpath +.factorypath +.project +.settings +.springBeans +.sts4-cache +bin/ +!**/src/main/**/bin/ +!**/src/test/**/bin/ + +### NetBeans ### +/nbproject/private/ +/nbbuild/ +/dist/ +/nbdist/ +/.nb-gradle/ + +### VS Code ### +.vscode/ + +### Mac OS ### +.DS_Store diff --git a/.idea/.gitignore b/.idea/.gitignore new file mode 100644 index 0000000..13566b8 --- /dev/null +++ b/.idea/.gitignore @@ -0,0 +1,8 @@ +# Default ignored files +/shelf/ +/workspace.xml +# Editor-based HTTP Client requests +/httpRequests/ +# Datasource local storage ignored files +/dataSources/ +/dataSources.local.xml diff --git a/.idea/git_toolbox_prj.xml b/.idea/git_toolbox_prj.xml new file mode 100644 index 0000000..02b915b --- /dev/null +++ b/.idea/git_toolbox_prj.xml @@ -0,0 +1,15 @@ + + + + + + + \ No newline at end of file diff --git a/.idea/gradle.xml b/.idea/gradle.xml new file mode 100644 index 0000000..6202524 --- /dev/null +++ b/.idea/gradle.xml @@ -0,0 +1,16 @@ + + + + + + \ No newline at end of file diff --git a/.idea/misc.xml b/.idea/misc.xml new file mode 100644 index 0000000..1ebec2f --- /dev/null +++ b/.idea/misc.xml @@ -0,0 +1,10 @@ + + + + + + + + + + \ No newline at end of file diff --git a/.idea/uiDesigner.xml b/.idea/uiDesigner.xml new file mode 100644 index 0000000..2b63946 --- /dev/null +++ b/.idea/uiDesigner.xml @@ -0,0 +1,124 @@ + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + \ No newline at end of file diff --git a/.idea/vcs.xml b/.idea/vcs.xml new file mode 100644 index 0000000..94a25f7 --- /dev/null +++ b/.idea/vcs.xml @@ -0,0 +1,6 @@ + + + + + + \ No newline at end of file diff --git a/README.md b/README.md index 1747e79..409d1f8 100644 --- a/README.md +++ b/README.md @@ -1,2 +1,10 @@ # simple-calculator 계산기 기능 구현 + +## 요구사항 +- 산술 연산을 진행할 수 있다. +- 숫자를 입력한 뒤, 한칸씩 띄어써야 구분을 할 수 있다. +- 최소 2개의 숫자와 1개의 산술 연산이 들어가야 한다. +- '-'를 숫자에 포함할 수 있다. +- 숫자와 '+', '-' , '/', '*' , 'Q' 만 사용할 수 있다. +- 'Q' 를 누르면 종료할 수 있다. diff --git a/build.gradle b/build.gradle new file mode 100644 index 0000000..46c588a --- /dev/null +++ b/build.gradle @@ -0,0 +1,21 @@ +plugins { + id 'java' +} + +group = 'com.yscp' +version = '1.0-SNAPSHOT' + +repositories { + mavenCentral() +} + +dependencies { + testImplementation platform('org.junit:junit-bom:5.10.0') + testImplementation 'org.junit.jupiter:junit-jupiter' + + testImplementation 'org.assertj:assertj-core:3.27.2' +} + +test { + useJUnitPlatform() +} diff --git a/gradle/wrapper/gradle-wrapper.jar b/gradle/wrapper/gradle-wrapper.jar new file mode 100644 index 0000000..249e583 Binary files /dev/null and b/gradle/wrapper/gradle-wrapper.jar differ diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties new file mode 100644 index 0000000..f62669b --- /dev/null +++ b/gradle/wrapper/gradle-wrapper.properties @@ -0,0 +1,6 @@ +#Sun Jan 12 23:16:28 KST 2025 +distributionBase=GRADLE_USER_HOME +distributionPath=wrapper/dists +distributionUrl=https\://services.gradle.org/distributions/gradle-8.5-bin.zip +zipStoreBase=GRADLE_USER_HOME +zipStorePath=wrapper/dists diff --git a/gradlew b/gradlew new file mode 100755 index 0000000..1b6c787 --- /dev/null +++ b/gradlew @@ -0,0 +1,234 @@ +#!/bin/sh + +# +# Copyright © 2015-2021 the original authors. +# +# Licensed under the Apache License, Version 2.0 (the "License"); +# you may not use this file except in compliance with the License. +# You may obtain a copy of the License at +# +# https://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. +# + +############################################################################## +# +# Gradle start up script for POSIX generated by Gradle. +# +# Important for running: +# +# (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is +# noncompliant, but you have some other compliant shell such as ksh or +# bash, then to run this script, type that shell name before the whole +# command line, like: +# +# ksh Gradle +# +# Busybox and similar reduced shells will NOT work, because this script +# requires all of these POSIX shell features: +# * functions; +# * expansions «$var», «${var}», «${var:-default}», «${var+SET}», +# «${var#prefix}», «${var%suffix}», and «$( cmd )»; +# * compound commands having a testable exit status, especially «case»; +# * various built-in commands including «command», «set», and «ulimit». +# +# Important for patching: +# +# (2) This script targets any POSIX shell, so it avoids extensions provided +# by Bash, Ksh, etc; in particular arrays are avoided. +# +# The "traditional" practice of packing multiple parameters into a +# space-separated string is a well documented source of bugs and security +# problems, so this is (mostly) avoided, by progressively accumulating +# options in "$@", and eventually passing that to Java. +# +# Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS, +# and GRADLE_OPTS) rely on word-splitting, this is performed explicitly; +# see the in-line comments for details. +# +# There are tweaks for specific operating systems such as AIX, CygWin, +# Darwin, MinGW, and NonStop. +# +# (3) This script is generated from the Groovy template +# https://github.com/gradle/gradle/blob/master/subprojects/plugins/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt +# within the Gradle project. +# +# You can find Gradle at https://github.com/gradle/gradle/. +# +############################################################################## + +# Attempt to set APP_HOME + +# Resolve links: $0 may be a link +app_path=$0 + +# Need this for daisy-chained symlinks. +while + APP_HOME=${app_path%"${app_path##*/}"} # leaves a trailing /; empty if no leading path + [ -h "$app_path" ] +do + ls=$( ls -ld "$app_path" ) + link=${ls#*' -> '} + case $link in #( + /*) app_path=$link ;; #( + *) app_path=$APP_HOME$link ;; + esac +done + +APP_HOME=$( cd "${APP_HOME:-./}" && pwd -P ) || exit + +APP_NAME="Gradle" +APP_BASE_NAME=${0##*/} + +# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script. +DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"' + +# Use the maximum available, or set MAX_FD != -1 to use that value. +MAX_FD=maximum + +warn () { + echo "$*" +} >&2 + +die () { + echo + echo "$*" + echo + exit 1 +} >&2 + +# OS specific support (must be 'true' or 'false'). +cygwin=false +msys=false +darwin=false +nonstop=false +case "$( uname )" in #( + CYGWIN* ) cygwin=true ;; #( + Darwin* ) darwin=true ;; #( + MSYS* | MINGW* ) msys=true ;; #( + NONSTOP* ) nonstop=true ;; +esac + +CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar + + +# Determine the Java command to use to start the JVM. +if [ -n "$JAVA_HOME" ] ; then + if [ -x "$JAVA_HOME/jre/sh/java" ] ; then + # IBM's JDK on AIX uses strange locations for the executables + JAVACMD=$JAVA_HOME/jre/sh/java + else + JAVACMD=$JAVA_HOME/bin/java + fi + if [ ! -x "$JAVACMD" ] ; then + die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME + +Please set the JAVA_HOME variable in your environment to match the +location of your Java installation." + fi +else + JAVACMD=java + which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. + +Please set the JAVA_HOME variable in your environment to match the +location of your Java installation." +fi + +# Increase the maximum file descriptors if we can. +if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then + case $MAX_FD in #( + max*) + MAX_FD=$( ulimit -H -n ) || + warn "Could not query maximum file descriptor limit" + esac + case $MAX_FD in #( + '' | soft) :;; #( + *) + ulimit -n "$MAX_FD" || + warn "Could not set maximum file descriptor limit to $MAX_FD" + esac +fi + +# Collect all arguments for the java command, stacking in reverse order: +# * args from the command line +# * the main class name +# * -classpath +# * -D...appname settings +# * --module-path (only if needed) +# * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables. + +# For Cygwin or MSYS, switch paths to Windows format before running java +if "$cygwin" || "$msys" ; then + APP_HOME=$( cygpath --path --mixed "$APP_HOME" ) + CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" ) + + JAVACMD=$( cygpath --unix "$JAVACMD" ) + + # Now convert the arguments - kludge to limit ourselves to /bin/sh + for arg do + if + case $arg in #( + -*) false ;; # don't mess with options #( + /?*) t=${arg#/} t=/${t%%/*} # looks like a POSIX filepath + [ -e "$t" ] ;; #( + *) false ;; + esac + then + arg=$( cygpath --path --ignore --mixed "$arg" ) + fi + # Roll the args list around exactly as many times as the number of + # args, so each arg winds up back in the position where it started, but + # possibly modified. + # + # NB: a `for` loop captures its iteration list before it begins, so + # changing the positional parameters here affects neither the number of + # iterations, nor the values presented in `arg`. + shift # remove old arg + set -- "$@" "$arg" # push replacement arg + done +fi + +# Collect all arguments for the java command; +# * $DEFAULT_JVM_OPTS, $JAVA_OPTS, and $GRADLE_OPTS can contain fragments of +# shell script including quotes and variable substitutions, so put them in +# double quotes to make sure that they get re-expanded; and +# * put everything else in single quotes, so that it's not re-expanded. + +set -- \ + "-Dorg.gradle.appname=$APP_BASE_NAME" \ + -classpath "$CLASSPATH" \ + org.gradle.wrapper.GradleWrapperMain \ + "$@" + +# Use "xargs" to parse quoted args. +# +# With -n1 it outputs one arg per line, with the quotes and backslashes removed. +# +# In Bash we could simply go: +# +# readarray ARGS < <( xargs -n1 <<<"$var" ) && +# set -- "${ARGS[@]}" "$@" +# +# but POSIX shell has neither arrays nor command substitution, so instead we +# post-process each arg (as a line of input to sed) to backslash-escape any +# character that might be a shell metacharacter, then use eval to reverse +# that process (while maintaining the separation between arguments), and wrap +# the whole thing up as a single "set" statement. +# +# This will of course break if any of these variables contains a newline or +# an unmatched quote. +# + +eval "set -- $( + printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" | + xargs -n1 | + sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' | + tr '\n' ' ' + )" '"$@"' + +exec "$JAVACMD" "$@" diff --git a/gradlew.bat b/gradlew.bat new file mode 100644 index 0000000..107acd3 --- /dev/null +++ b/gradlew.bat @@ -0,0 +1,89 @@ +@rem +@rem Copyright 2015 the original author or authors. +@rem +@rem Licensed under the Apache License, Version 2.0 (the "License"); +@rem you may not use this file except in compliance with the License. +@rem You may obtain a copy of the License at +@rem +@rem https://www.apache.org/licenses/LICENSE-2.0 +@rem +@rem Unless required by applicable law or agreed to in writing, software +@rem distributed under the License is distributed on an "AS IS" BASIS, +@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +@rem See the License for the specific language governing permissions and +@rem limitations under the License. +@rem + +@if "%DEBUG%" == "" @echo off +@rem ########################################################################## +@rem +@rem Gradle startup script for Windows +@rem +@rem ########################################################################## + +@rem Set local scope for the variables with windows NT shell +if "%OS%"=="Windows_NT" setlocal + +set DIRNAME=%~dp0 +if "%DIRNAME%" == "" set DIRNAME=. +set APP_BASE_NAME=%~n0 +set APP_HOME=%DIRNAME% + +@rem Resolve any "." and ".." in APP_HOME to make it shorter. +for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi + +@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script. +set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m" + +@rem Find java.exe +if defined JAVA_HOME goto findJavaFromJavaHome + +set JAVA_EXE=java.exe +%JAVA_EXE% -version >NUL 2>&1 +if "%ERRORLEVEL%" == "0" goto execute + +echo. +echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. +echo. +echo Please set the JAVA_HOME variable in your environment to match the +echo location of your Java installation. + +goto fail + +:findJavaFromJavaHome +set JAVA_HOME=%JAVA_HOME:"=% +set JAVA_EXE=%JAVA_HOME%/bin/java.exe + +if exist "%JAVA_EXE%" goto execute + +echo. +echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% +echo. +echo Please set the JAVA_HOME variable in your environment to match the +echo location of your Java installation. + +goto fail + +:execute +@rem Setup the command line + +set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar + + +@rem Execute Gradle +"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %* + +:end +@rem End local scope for the variables with windows NT shell +if "%ERRORLEVEL%"=="0" goto mainEnd + +:fail +rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of +rem the _cmd.exe /c_ return code! +if not "" == "%GRADLE_EXIT_CONSOLE%" exit 1 +exit /b 1 + +:mainEnd +if "%OS%"=="Windows_NT" endlocal + +:omega diff --git a/settings.gradle b/settings.gradle new file mode 100644 index 0000000..90d6f9f --- /dev/null +++ b/settings.gradle @@ -0,0 +1,2 @@ +rootProject.name = 'simple-calculator' + diff --git a/src/main/java/com/yscp/Main.java b/src/main/java/com/yscp/Main.java new file mode 100644 index 0000000..312134d --- /dev/null +++ b/src/main/java/com/yscp/Main.java @@ -0,0 +1,38 @@ +package com.yscp; + +import com.yscp.domain.CalculatorGame; +import com.yscp.domain.Number; +import com.yscp.domain.strategy.BasicStrategy; + +import java.util.Scanner; + +public class Main { + public static void main(String[] args) { + CalculatorGame calculatorGame = new CalculatorGame(new BasicStrategy()); + Scanner scanner = new Scanner(System.in); + + String input; + + do { + System.out.println("계산식을 입력해주세요 q 또는 Q 를 입력하면 종료됩니다."); + input = scanner.nextLine(); + if (input == null || input.isBlank()) { + break; + } + + if (input.contains("Q") || input.contains("q")) { + break; + } + + try { + Number result = calculatorGame.calculate(input); + System.out.println("result :: " + result.value()); + } catch (Exception e) { + scanner.close(); + } + + } while (true); + + scanner.close(); + } +} diff --git a/src/main/java/com/yscp/domain/Calculator.java b/src/main/java/com/yscp/domain/Calculator.java new file mode 100644 index 0000000..84e1a2c --- /dev/null +++ b/src/main/java/com/yscp/domain/Calculator.java @@ -0,0 +1,27 @@ +package com.yscp.domain; + +import com.yscp.domain.operator.Operator; +import com.yscp.domain.operator.OperatorType; + +import java.util.List; + +public class Calculator { + private List operators; + + public Calculator(List operators) { + this.operators = operators; + } + + + public Number calculate(Number number1, OperatorType operatorType, Number number2) { + return findByOperatorType(operatorType) + .operate(number1, number2); + } + + private Operator findByOperatorType(OperatorType operatorType) { + return operators.stream() + .filter(operator -> operator.isMatch(operatorType)) + .findFirst() + .orElseThrow(() -> new IllegalArgumentException("invalid operator type: " + operatorType)); + } +} diff --git a/src/main/java/com/yscp/domain/CalculatorGame.java b/src/main/java/com/yscp/domain/CalculatorGame.java new file mode 100644 index 0000000..80b5027 --- /dev/null +++ b/src/main/java/com/yscp/domain/CalculatorGame.java @@ -0,0 +1,15 @@ +package com.yscp.domain; + +import com.yscp.domain.strategy.CalculatorStrategy; + +public class CalculatorGame { + private final CalculatorStrategy calculatorStrategy; + + public CalculatorGame(CalculatorStrategy calculatorStrategy) { + this.calculatorStrategy = calculatorStrategy; + } + + public Number calculate(String input) { + return calculatorStrategy.calculate(input); + } +} diff --git a/src/main/java/com/yscp/domain/Number.java b/src/main/java/com/yscp/domain/Number.java new file mode 100644 index 0000000..402f0f1 --- /dev/null +++ b/src/main/java/com/yscp/domain/Number.java @@ -0,0 +1,47 @@ +package com.yscp.domain; + +import java.util.Objects; + +public class Number { + private final Integer value; + + public Number(String numberString) { + this(Integer.parseInt(numberString)); + } + + public Number(Integer value) { + this.value = value; + } + + public Integer value() { + return value; + } + + public Number minus(Number other) { + return new Number(value - other.value); + } + + public Number mod(Number other) { + return new Number(value / other.value); + } + + public Number plus(Number other) { + return new Number(value + other.value); + } + + public Number multiply(Number other) { + return new Number(value * other.value); + } + + @Override + public boolean equals(Object object) { + if (this == object) return true; + if (!(object instanceof Number number)) return false; + return Objects.equals(value, number.value); + } + + @Override + public int hashCode() { + return Objects.hashCode(value); + } +} diff --git a/src/main/java/com/yscp/domain/operator/MinusOperator.java b/src/main/java/com/yscp/domain/operator/MinusOperator.java new file mode 100644 index 0000000..6516bd6 --- /dev/null +++ b/src/main/java/com/yscp/domain/operator/MinusOperator.java @@ -0,0 +1,18 @@ +package com.yscp.domain.operator; + +import com.yscp.domain.Number; + +import java.util.Objects; + +public class MinusOperator implements Operator { + @Override + public boolean isMatch(OperatorType operatorType) { + return Objects.equals(OperatorType.MINUS, operatorType); + } + + + @Override + public Number operate(Number number1, Number number2) { + return number1.minus(number2); + } +} diff --git a/src/main/java/com/yscp/domain/operator/ModOperator.java b/src/main/java/com/yscp/domain/operator/ModOperator.java new file mode 100644 index 0000000..68d41f8 --- /dev/null +++ b/src/main/java/com/yscp/domain/operator/ModOperator.java @@ -0,0 +1,17 @@ +package com.yscp.domain.operator; + +import com.yscp.domain.Number; + +import java.util.Objects; + +public class ModOperator implements Operator { + @Override + public boolean isMatch(OperatorType operatorType) { + return Objects.equals(OperatorType.MOD, operatorType); + } + + @Override + public Number operate(Number number1, Number number2) { + return number1.mod(number2); + } +} diff --git a/src/main/java/com/yscp/domain/operator/MultiplyOperator.java b/src/main/java/com/yscp/domain/operator/MultiplyOperator.java new file mode 100644 index 0000000..df5e3e6 --- /dev/null +++ b/src/main/java/com/yscp/domain/operator/MultiplyOperator.java @@ -0,0 +1,17 @@ +package com.yscp.domain.operator; + +import com.yscp.domain.Number; + +import java.util.Objects; + +public class MultiplyOperator implements Operator { + @Override + public boolean isMatch(OperatorType operatorType) { + return Objects.equals(OperatorType.MULTIPLY, operatorType); + } + + @Override + public Number operate(Number number1, Number number2) { + return number1.multiply(number2); + } +} diff --git a/src/main/java/com/yscp/domain/operator/Operator.java b/src/main/java/com/yscp/domain/operator/Operator.java new file mode 100644 index 0000000..55c79f0 --- /dev/null +++ b/src/main/java/com/yscp/domain/operator/Operator.java @@ -0,0 +1,9 @@ +package com.yscp.domain.operator; + +import com.yscp.domain.Number; + +public interface Operator { + boolean isMatch(OperatorType operatorType); + + Number operate(Number number1, Number number2); +} diff --git a/src/main/java/com/yscp/domain/operator/OperatorType.java b/src/main/java/com/yscp/domain/operator/OperatorType.java new file mode 100644 index 0000000..6055698 --- /dev/null +++ b/src/main/java/com/yscp/domain/operator/OperatorType.java @@ -0,0 +1,44 @@ +package com.yscp.domain.operator; + +import java.util.Arrays; +import java.util.HashMap; +import java.util.Map; +import java.util.Optional; + +public enum OperatorType { + + PLUS("+"), + MINUS("-"), + MULTIPLY("*"), + MOD("/"), + ; + + private final String type; + private static final Map MAPPINGS = new HashMap<>(); + + static { + Arrays.stream(OperatorType.values()) + .forEach(operatorType -> MAPPINGS.put(operatorType.type, operatorType)); + } + + OperatorType(String type) { + this.type = type; + } + + public static OperatorType from(String requestType) { + if (requestType == null || requestType.isBlank()) { + throw new IllegalArgumentException("Request must not be null "); + } + + return Optional.ofNullable(MAPPINGS.get(requestType)) + .orElseThrow(() -> new IllegalArgumentException("Unknown operator type: " + requestType)); + } + + public boolean isPlusOrMinus() { + return this.equals(PLUS) || this.equals(MINUS); + } + + public boolean isMultiplyOrMod() { + return this.equals(MULTIPLY) || this.equals(MOD); + } +} diff --git a/src/main/java/com/yscp/domain/operator/PlusOperator.java b/src/main/java/com/yscp/domain/operator/PlusOperator.java new file mode 100644 index 0000000..7a19aa9 --- /dev/null +++ b/src/main/java/com/yscp/domain/operator/PlusOperator.java @@ -0,0 +1,17 @@ +package com.yscp.domain.operator; + +import com.yscp.domain.Number; + +public class PlusOperator implements Operator { + + @Override + public boolean isMatch(OperatorType operatorType) { + return OperatorType.PLUS.equals(operatorType); + } + + @Override + public Number operate(Number number1, Number number2) { + return number1.plus(number2); + } + +} diff --git a/src/main/java/com/yscp/domain/strategy/BasicStrategy.java b/src/main/java/com/yscp/domain/strategy/BasicStrategy.java new file mode 100644 index 0000000..fd5ad64 --- /dev/null +++ b/src/main/java/com/yscp/domain/strategy/BasicStrategy.java @@ -0,0 +1,77 @@ +package com.yscp.domain.strategy; + +import com.yscp.domain.Calculator; +import com.yscp.domain.Number; +import com.yscp.domain.operator.*; + +import java.util.List; + +public class BasicStrategy implements CalculatorStrategy { + private static final Calculator calculators; + + public BasicStrategy() { + } + + static { + List operators = List.of(new PlusOperator(), + new MinusOperator(), + new MultiplyOperator(), + new ModOperator()); + + calculators = new Calculator(operators); + } + + + @Override + public Number calculate(String input) { + String[] splitString = splitGap(input); + + Number[] numbers = numberSplit(splitString); + + OperatorType[] operatorString = operatorSplit(splitString); + int operatorSize = operatorString.length; + + Number result = calculators.calculate(numbers[0], operatorString[0], numbers[1]); + + for (int i = 1; i < operatorSize; i++) { + if (i + 1 < operatorSize && + (operatorString[i].isPlusOrMinus()) && + (operatorString[i + 1].isMultiplyOrMod())) { + numbers[i + 1] = calculators.calculate(numbers[i + 1], operatorString[i + 1], numbers[i + 2]); + numbers[i + 2] = new Number(1); + } + + result = calculators.calculate(result, operatorString[i], numbers[i + 1]); + } + + return result; + } + + private OperatorType[] operatorSplit(String[] splitString) { + int size = (splitString.length / 2); + OperatorType[] operatorSplit = new OperatorType[size]; + + int temp = 0; + + for (int i = 1; temp < size; i += 2) { + operatorSplit[temp] = OperatorType.from(splitString[i]); + temp += 1; + } + + return operatorSplit; + } + + private Number[] numberSplit(String[] splitString) { + int size = (splitString.length / 2) + 1; + Number[] numberStrings = new Number[size]; + for (int i = 0; i < size; i++) { + numberStrings[i] = new Number(splitString[2 * i]); + } + + return numberStrings; + } + + private String[] splitGap(String input) { + return input.split(" "); + } +} diff --git a/src/main/java/com/yscp/domain/strategy/CalculatorStrategy.java b/src/main/java/com/yscp/domain/strategy/CalculatorStrategy.java new file mode 100644 index 0000000..82d76b4 --- /dev/null +++ b/src/main/java/com/yscp/domain/strategy/CalculatorStrategy.java @@ -0,0 +1,7 @@ +package com.yscp.domain.strategy; + +import com.yscp.domain.Number; + +public interface CalculatorStrategy { + Number calculate(String input); +} diff --git a/src/test/java/com/yscp/domain/MinusOperatorTest.java b/src/test/java/com/yscp/domain/MinusOperatorTest.java new file mode 100644 index 0000000..b2d4559 --- /dev/null +++ b/src/test/java/com/yscp/domain/MinusOperatorTest.java @@ -0,0 +1,28 @@ +package com.yscp.domain; + +import com.yscp.domain.operator.MinusOperator; +import com.yscp.domain.operator.Operator; +import org.assertj.core.api.Assertions; +import org.junit.jupiter.api.BeforeEach; +import org.junit.jupiter.api.DisplayName; +import org.junit.jupiter.params.ParameterizedTest; +import org.junit.jupiter.params.provider.CsvSource; + +@DisplayName("MinusOperator") +class MinusOperatorTest { + + Operator operator; + + @BeforeEach + void setUp() { + operator = new MinusOperator(); + } + + @ParameterizedTest + @DisplayName("Number1 에서 Number2를 뺄 수 있다.") + @CsvSource(value = {"1,-1,2", "1,1,0", "-1,-1,0"}) + void minusNumber2FromNumber1(Integer number1, Integer number2, Integer result) { + Number resultNumber = new Number(result); + Assertions.assertThat(operator.operate(new Number(number1), new Number(number2))).isEqualTo(resultNumber); + } +} diff --git a/src/test/java/com/yscp/domain/ModOperatorTest.java b/src/test/java/com/yscp/domain/ModOperatorTest.java new file mode 100644 index 0000000..410dbbd --- /dev/null +++ b/src/test/java/com/yscp/domain/ModOperatorTest.java @@ -0,0 +1,31 @@ +package com.yscp.domain; + +import com.yscp.domain.operator.ModOperator; +import com.yscp.domain.operator.Operator; +import org.assertj.core.api.Assertions; +import org.junit.jupiter.api.BeforeEach; +import org.junit.jupiter.api.DisplayName; +import org.junit.jupiter.params.ParameterizedTest; +import org.junit.jupiter.params.provider.Arguments; +import org.junit.jupiter.params.provider.CsvSource; +import org.junit.jupiter.params.provider.MethodSource; + +import java.util.stream.Stream; + +@DisplayName("ModOperator ") +class ModOperatorTest { + private Operator operator; + + @BeforeEach + void setUp() { + operator = new ModOperator(); + } + + @ParameterizedTest + @DisplayName("두 숫자를 나눌 수 있다.") + @CsvSource(value = {"4,1,4", "4,4,1", "4,-2,-2"}) + void itReturnsModResult(Integer number1, Integer number2, Integer result) { + Number resultNumber = new Number(result); + Assertions.assertThat(operator.operate(new Number(number1), new Number(number2))).isEqualTo(resultNumber); + } +} diff --git a/src/test/java/com/yscp/domain/MultiplyOperatorTest.java b/src/test/java/com/yscp/domain/MultiplyOperatorTest.java new file mode 100644 index 0000000..d190c5b --- /dev/null +++ b/src/test/java/com/yscp/domain/MultiplyOperatorTest.java @@ -0,0 +1,32 @@ +package com.yscp.domain; + +import com.yscp.domain.operator.MultiplyOperator; +import com.yscp.domain.operator.Operator; +import org.assertj.core.api.Assertions; +import org.junit.jupiter.api.BeforeEach; +import org.junit.jupiter.api.DisplayName; +import org.junit.jupiter.params.ParameterizedTest; +import org.junit.jupiter.params.provider.Arguments; +import org.junit.jupiter.params.provider.CsvSource; +import org.junit.jupiter.params.provider.MethodSource; + +import java.util.stream.Stream; + +@DisplayName("MultiplyOperator") +class MultiplyOperatorTest { + + private Operator operator; + + @BeforeEach + void setUp() { + operator = new MultiplyOperator(); + } + + @ParameterizedTest + @DisplayName("두 숫자를 곱할 수 있다.") + @CsvSource(value = {"4,-4,-16", "2,2,4", "-4,-4,16"}) + void itReturnsMultiplyNumber(Integer number1, Integer number2, Integer result) { + Number resultNumber = new Number(result); + Assertions.assertThat(operator.operate(new Number(number1), new Number(number2))).isEqualTo(resultNumber); + } +} diff --git a/src/test/java/com/yscp/domain/NumberTest.java b/src/test/java/com/yscp/domain/NumberTest.java new file mode 100644 index 0000000..034bd7e --- /dev/null +++ b/src/test/java/com/yscp/domain/NumberTest.java @@ -0,0 +1,81 @@ +package com.yscp.domain; + +import org.assertj.core.api.Assertions; +import org.junit.jupiter.api.DisplayName; +import org.junit.jupiter.params.ParameterizedTest; +import org.junit.jupiter.params.provider.CsvSource; +import org.junit.jupiter.params.provider.NullAndEmptySource; + +import static org.junit.jupiter.api.Assertions.*; + +@DisplayName("Number") +class NumberTest { + + @ParameterizedTest + @DisplayName("생성자는 유효한 숫자 문자를 받았을 경우 숫자 고유 객체를 생성한다.") + @CsvSource(value = {"1,1", "-1,-1", "0,0"}) + void constructorWithValidParameter(String numberString, Integer result) { + Number number = new Number(numberString); + Assertions.assertThat(number.value()).isEqualTo(result); + } + + @ParameterizedTest + @DisplayName("숫자가 아닌 문자인 경우 예외를 던진다.") + @CsvSource(value = {"a", "&", "*"}) + void itThrowExceptionWhenNotNumberString(String numberString) { + Assertions.assertThatThrownBy(() -> new Number(numberString)); + } + + @ParameterizedTest + @DisplayName("빈 문자열 공백인 경우 예외를 던진다.") + @NullAndEmptySource + void itThrowExceptionWhenNullOrEmptyString(String numberString) { + Assertions.assertThatThrownBy(() -> new Number(numberString)); + } + + + @ParameterizedTest + @DisplayName("숫자를 나눌 수 있다.") + @CsvSource(value = {"9,3,3", "4,2,2", "4,5,0"}) + void mod(Integer number1, Integer number2, Integer result) { + Number number = new Number(number1); + Number otherNumber = new Number(number2); + + Number resultNumber = new Number(result); + Assertions.assertThat(number.mod(otherNumber)).isEqualTo(resultNumber); + } + + @ParameterizedTest + @DisplayName("숫자를 더할 수 있다.") + @CsvSource(value = {"9,3,12", "4,2,6", "4,5,9"}) + void plus(Integer number1, Integer number2, Integer result) { + Number number = new Number(number1); + Number otherNumber = new Number(number2); + + Number resultNumber = new Number(result); + Assertions.assertThat(number.plus(otherNumber)).isEqualTo(resultNumber); + } + + @ParameterizedTest + @DisplayName("숫자를 뺄 수 있다.") + @CsvSource(value = {"9,3,6", "4,2,2", "4,5,-1"}) + void minus(Integer number1, Integer number2, Integer result) { + Number number = new Number(number1); + Number otherNumber = new Number(number2); + + Number resultNumber = new Number(result); + Assertions.assertThat(number.minus(otherNumber)).isEqualTo(resultNumber); + } + + @ParameterizedTest + @DisplayName("숫자를 곱할 수 있다.") + @CsvSource(value = {"9,3,27", "4,2,8", "4,5,20"}) + void multiply(Integer number1, Integer number2, Integer result) { + Number number = new Number(number1); + Number otherNumber = new Number(number2); + + Number resultNumber = new Number(result); + Assertions.assertThat(number.multiply(otherNumber)).isEqualTo(resultNumber); + } + +} diff --git a/src/test/java/com/yscp/domain/PlusOperatorTest.java b/src/test/java/com/yscp/domain/PlusOperatorTest.java new file mode 100644 index 0000000..07812f2 --- /dev/null +++ b/src/test/java/com/yscp/domain/PlusOperatorTest.java @@ -0,0 +1,34 @@ +package com.yscp.domain; + +import com.yscp.domain.operator.Operator; +import com.yscp.domain.operator.PlusOperator; +import org.assertj.core.api.Assertions; +import org.junit.jupiter.api.BeforeEach; +import org.junit.jupiter.api.DisplayName; +import org.junit.jupiter.params.ParameterizedTest; +import org.junit.jupiter.params.provider.Arguments; +import org.junit.jupiter.params.provider.CsvSource; +import org.junit.jupiter.params.provider.MethodSource; + +import java.util.stream.Stream; + + +@DisplayName("PlusOperator ") +class PlusOperatorTest { + + private Operator operator; + + @BeforeEach + void setUp() { + operator = new PlusOperator(); + } + + @ParameterizedTest + @DisplayName("숫자 2개를 더할 수 있다.") + @CsvSource(value = {"0,1,1", "1,-1,0"}) + void itReturnsSumNumber1AndNumber2(int number1, int number2, int result) { + Number resultNumber = new Number(result); + Assertions.assertThat(operator.operate(new Number(number1), new Number(number2))).isEqualTo(resultNumber); + } + +} diff --git a/src/test/java/com/yscp/domain/operator/CalculatorTest.java b/src/test/java/com/yscp/domain/operator/CalculatorTest.java new file mode 100644 index 0000000..7399c31 --- /dev/null +++ b/src/test/java/com/yscp/domain/operator/CalculatorTest.java @@ -0,0 +1,43 @@ +package com.yscp.domain.operator; + +import com.yscp.domain.Calculator; +import com.yscp.domain.Number; +import org.assertj.core.api.Assertions; +import org.junit.jupiter.api.BeforeEach; +import org.junit.jupiter.api.DisplayName; +import org.junit.jupiter.params.ParameterizedTest; +import org.junit.jupiter.params.provider.Arguments; +import org.junit.jupiter.params.provider.MethodSource; + +import java.util.List; +import java.util.stream.Stream; + +@DisplayName("Calculators") +class CalculatorTest { + + private Calculator calculators; + + @BeforeEach + void setUp() { + List operators = List.of(new PlusOperator(), + new MinusOperator(), + new MultiplyOperator(), + new ModOperator()); + calculators = new Calculator(operators); + } + + public static Stream validRequest() { + return Stream.of(Arguments.of(new Number(1), OperatorType.from("+"), new Number(2), new Number(3)), + Arguments.of(new Number(1), OperatorType.from("-"), new Number(2), new Number(-1)), + Arguments.of(new Number(1), OperatorType.from("*"), new Number(2), new Number(2)), + Arguments.of(new Number(1), OperatorType.from("/"), new Number(2), new Number(0)) + ); + } + + @ParameterizedTest + @DisplayName("유효한 파라미터가 들어올 경우 계산을 할 수 있다.") + @MethodSource("validRequest") + void calculateWithValidNumbers(Number number1, OperatorType operator, Number number2, Number expected) { + Assertions.assertThat(calculators.calculate(number1, operator, number2)).isEqualTo(expected); + } +} diff --git a/src/test/java/com/yscp/domain/operator/OperatorTypeTest.java b/src/test/java/com/yscp/domain/operator/OperatorTypeTest.java new file mode 100644 index 0000000..5729da9 --- /dev/null +++ b/src/test/java/com/yscp/domain/operator/OperatorTypeTest.java @@ -0,0 +1,50 @@ +package com.yscp.domain.operator; + +import org.assertj.core.api.Assertions; +import org.junit.jupiter.api.DisplayName; +import org.junit.jupiter.api.Test; +import org.junit.jupiter.params.ParameterizedTest; +import org.junit.jupiter.params.provider.Arguments; +import org.junit.jupiter.params.provider.CsvSource; +import org.junit.jupiter.params.provider.MethodSource; +import org.junit.jupiter.params.provider.NullAndEmptySource; + +import java.util.stream.Stream; + +import static org.junit.jupiter.api.Assertions.*; + +@DisplayName("OperatorType") +class OperatorTypeTest { + + @ParameterizedTest + @DisplayName("문자열에 해당하는 산술 타입을 조회할 수 있다.") + @MethodSource("operatorRequestAndResult") + void itReturnsOperatorType(String requestType, OperatorType operatorType) { + Assertions.assertThat(OperatorType.from(requestType)).isEqualTo(operatorType); + } + + + public static Stream operatorRequestAndResult() { + return Stream.of(Arguments.of("+", OperatorType.PLUS), + Arguments.of("-", OperatorType.MINUS), + Arguments.of("*", OperatorType.MULTIPLY), + Arguments.of("/", OperatorType.MOD) + ); + } + + @DisplayName("요청이 null 값 또는 빈값일 경우 예외를 던진다.") + @ParameterizedTest + @NullAndEmptySource + void itThrowExceptionWhenNullOrEmptyRequest(String request) { + Assertions.assertThatThrownBy(() -> OperatorType.from(request)) + .isInstanceOf(IllegalArgumentException.class); + } + + @DisplayName("존재하지 않는 String 값일 경우 예외를 던진다.") + @ParameterizedTest + @CsvSource(value = {"++", "--", "aa"}) + void itThrowExceptionWhenInvalidString(String request) { + Assertions.assertThatThrownBy(() -> OperatorType.from(request)) + .isInstanceOf(IllegalArgumentException.class); + } +} diff --git a/src/test/java/com/yscp/domain/strategy/BasicStrategyTest.java b/src/test/java/com/yscp/domain/strategy/BasicStrategyTest.java new file mode 100644 index 0000000..a058972 --- /dev/null +++ b/src/test/java/com/yscp/domain/strategy/BasicStrategyTest.java @@ -0,0 +1,21 @@ +package com.yscp.domain.strategy; + +import com.yscp.domain.Number; +import org.assertj.core.api.Assertions; +import org.junit.jupiter.api.DisplayName; +import org.junit.jupiter.params.ParameterizedTest; +import org.junit.jupiter.params.provider.CsvSource; + +class BasicStrategyTest { + + + @ParameterizedTest + @DisplayName("곱셈 나눗셈 우선순위를 둔 일방적인 계산기능을 수행할 수 있다.") + @CsvSource(value = {"1 - 2 + 3 * 4 / 2, 5"}) + void calculate(String input, Integer result) { + + CalculatorStrategy basicStrategy = new BasicStrategy(); + Number resultNumber = new Number(result); + Assertions.assertThat(basicStrategy.calculate(input)).isEqualTo(resultNumber); + } +}