commit 234c26f377614b2a9815bdb42731950427a6d2f5 Author: Anton Lydike Date: Mon Aug 3 21:52:38 2020 +0200 initial commit diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..41f9a27 --- /dev/null +++ b/.gitignore @@ -0,0 +1,138 @@ + +# Created by https://www.toptal.com/developers/gitignore/api/kotlin,intellij+all,gradle +# Edit at https://www.toptal.com/developers/gitignore?templates=kotlin,intellij+all,gradle + +### Intellij+all ### +# Covers JetBrains IDEs: IntelliJ, RubyMine, PhpStorm, AppCode, PyCharm, CLion, Android Studio, WebStorm and Rider +# Reference: https://intellij-support.jetbrains.com/hc/en-us/articles/206544839 + +# User-specific stuff +.idea/**/workspace.xml +.idea/**/tasks.xml +.idea/**/usage.statistics.xml +.idea/**/dictionaries +.idea/**/shelf + +# Generated files +.idea/**/contentModel.xml + +# Sensitive or high-churn files +.idea/**/dataSources/ +.idea/**/dataSources.ids +.idea/**/dataSources.local.xml +.idea/**/sqlDataSources.xml +.idea/**/dynamic.xml +.idea/**/uiDesigner.xml +.idea/**/dbnavigator.xml + +# Gradle +.idea/**/gradle.xml +.idea/**/libraries + +# Gradle and Maven with auto-import +# When using Gradle or Maven with auto-import, you should exclude module files, +# since they will be recreated, and may cause churn. Uncomment if using +# auto-import. +# .idea/artifacts +# .idea/compiler.xml +# .idea/jarRepositories.xml +# .idea/modules.xml +# .idea/*.iml +# .idea/modules +# *.iml +# *.ipr + +# CMake +cmake-build-*/ + +# Mongo Explorer plugin +.idea/**/mongoSettings.xml + +# File-based project format +*.iws + +# IntelliJ +out/ + +# mpeltonen/sbt-idea plugin +.idea_modules/ + +# JIRA plugin +atlassian-ide-plugin.xml + +# Cursive Clojure plugin +.idea/replstate.xml + +# Crashlytics plugin (for Android Studio and IntelliJ) +com_crashlytics_export_strings.xml +crashlytics.properties +crashlytics-build.properties +fabric.properties + +# Editor-based Rest Client +.idea/httpRequests + +# Android studio 3.1+ serialized cache file +.idea/caches/build_file_checksums.ser + +### Intellij+all Patch ### +# Ignores the whole .idea folder and all .iml files +# See https://github.com/joeblau/gitignore.io/issues/186 and https://github.com/joeblau/gitignore.io/issues/360 + +.idea/ + +# Reason: https://github.com/joeblau/gitignore.io/issues/186#issuecomment-249601023 + +*.iml +modules.xml +.idea/misc.xml +*.ipr + +# Sonarlint plugin +.idea/sonarlint + +### Kotlin ### +# Compiled class file +*.class + +# Log file +*.log + +# BlueJ files +*.ctxt + +# Mobile Tools for Java (J2ME) +.mtj.tmp/ + +# Package Files # +*.jar +*.war +*.nar +*.ear +*.zip +*.tar.gz +*.rar + +# virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml +hs_err_pid* + +### Gradle ### +.gradle +build/ + +# Ignore Gradle GUI config +gradle-app.setting + +# Avoid ignoring Gradle wrapper jar file (.jar files are usually ignored) +!gradle-wrapper.jar + +# Cache of project +.gradletasknamecache + +# # Work around https://youtrack.jetbrains.com/issue/IDEA-116898 +# gradle/wrapper/gradle-wrapper.properties + +### Gradle Patch ### +**/build/ + +# End of https://www.toptal.com/developers/gitignore/api/kotlin,intellij+all,gradle diff --git a/README.md b/README.md new file mode 100644 index 0000000..1bd5882 --- /dev/null +++ b/README.md @@ -0,0 +1,3 @@ +# Music + +A fun project to learn kotlin and to make some god darn music \ No newline at end of file diff --git a/build.gradle.kts b/build.gradle.kts new file mode 100644 index 0000000..a169ea6 --- /dev/null +++ b/build.gradle.kts @@ -0,0 +1,40 @@ +/* + * This file was generated by the Gradle 'init' task. + * + * This generated file contains a sample Kotlin application project to get you started. + */ + +plugins { + // Apply the Kotlin JVM plugin to add support for Kotlin. + id("org.jetbrains.kotlin.jvm") version "1.3.41" + + // Apply the application plugin to add support for building a CLI application. + application +} + +repositories { + // Use jcenter for resolving dependencies. + // You can declare any Maven/Ivy/file repository here. + jcenter() + + mavenCentral() +} + +dependencies { + // Align versions of all Kotlin components + implementation(platform("org.jetbrains.kotlin:kotlin-bom")) + + // Use the Kotlin JDK 8 standard library. + implementation("org.jetbrains.kotlin:kotlin-stdlib-jdk8") + + // Use the Kotlin test library. + testImplementation("org.jetbrains.kotlin:kotlin-test") + + // Use the Kotlin JUnit integration. + testImplementation("org.jetbrains.kotlin:kotlin-test-junit") +} + +application { + // Define the main class for the application + mainClassName = "music.MainKt" +} diff --git a/gradle/wrapper/gradle-wrapper.jar b/gradle/wrapper/gradle-wrapper.jar new file mode 100644 index 0000000..5c2d1cf 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..5028f28 --- /dev/null +++ b/gradle/wrapper/gradle-wrapper.properties @@ -0,0 +1,5 @@ +distributionBase=GRADLE_USER_HOME +distributionPath=wrapper/dists +distributionUrl=https\://services.gradle.org/distributions/gradle-5.6.4-bin.zip +zipStoreBase=GRADLE_USER_HOME +zipStorePath=wrapper/dists diff --git a/gradlew b/gradlew new file mode 100755 index 0000000..83f2acf --- /dev/null +++ b/gradlew @@ -0,0 +1,188 @@ +#!/usr/bin/env sh + +# +# Copyright 2015 the original author or 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 UN*X +## +############################################################################## + +# Attempt to set APP_HOME +# Resolve links: $0 may be a link +PRG="$0" +# Need this for relative symlinks. +while [ -h "$PRG" ] ; do + ls=`ls -ld "$PRG"` + link=`expr "$ls" : '.*-> \(.*\)$'` + if expr "$link" : '/.*' > /dev/null; then + PRG="$link" + else + PRG=`dirname "$PRG"`"/$link" + fi +done +SAVED="`pwd`" +cd "`dirname \"$PRG\"`/" >/dev/null +APP_HOME="`pwd -P`" +cd "$SAVED" >/dev/null + +APP_NAME="Gradle" +APP_BASE_NAME=`basename "$0"` + +# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script. +DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"' + +# Use the maximum available, or set MAX_FD != -1 to use that value. +MAX_FD="maximum" + +warn () { + echo "$*" +} + +die () { + echo + echo "$*" + echo + exit 1 +} + +# OS specific support (must be 'true' or 'false'). +cygwin=false +msys=false +darwin=false +nonstop=false +case "`uname`" in + CYGWIN* ) + cygwin=true + ;; + Darwin* ) + darwin=true + ;; + MINGW* ) + msys=true + ;; + NONSTOP* ) + nonstop=true + ;; +esac + +CLASSPATH=$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" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then + MAX_FD_LIMIT=`ulimit -H -n` + if [ $? -eq 0 ] ; then + if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then + MAX_FD="$MAX_FD_LIMIT" + fi + ulimit -n $MAX_FD + if [ $? -ne 0 ] ; then + warn "Could not set maximum file descriptor limit: $MAX_FD" + fi + else + warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT" + fi +fi + +# For Darwin, add options to specify how the application appears in the dock +if $darwin; then + GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\"" +fi + +# For Cygwin or MSYS, switch paths to Windows format before running java +if [ "$cygwin" = "true" -o "$msys" = "true" ] ; then + APP_HOME=`cygpath --path --mixed "$APP_HOME"` + CLASSPATH=`cygpath --path --mixed "$CLASSPATH"` + JAVACMD=`cygpath --unix "$JAVACMD"` + + # We build the pattern for arguments to be converted via cygpath + ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null` + SEP="" + for dir in $ROOTDIRSRAW ; do + ROOTDIRS="$ROOTDIRS$SEP$dir" + SEP="|" + done + OURCYGPATTERN="(^($ROOTDIRS))" + # Add a user-defined pattern to the cygpath arguments + if [ "$GRADLE_CYGPATTERN" != "" ] ; then + OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)" + fi + # Now convert the arguments - kludge to limit ourselves to /bin/sh + i=0 + for arg in "$@" ; do + CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -` + CHECK2=`echo "$arg"|egrep -c "^-"` ### Determine if an option + + if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then ### Added a condition + eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"` + else + eval `echo args$i`="\"$arg\"" + fi + i=$((i+1)) + done + case $i in + (0) set -- ;; + (1) set -- "$args0" ;; + (2) set -- "$args0" "$args1" ;; + (3) set -- "$args0" "$args1" "$args2" ;; + (4) set -- "$args0" "$args1" "$args2" "$args3" ;; + (5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;; + (6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;; + (7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;; + (8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;; + (9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;; + esac +fi + +# Escape application args +save () { + for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done + echo " " +} +APP_ARGS=$(save "$@") + +# Collect all arguments for the java command, following the shell quoting and substitution rules +eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS" + +# by default we should be in the correct project dir, but when run from Finder on Mac, the cwd is wrong +if [ "$(uname)" = "Darwin" ] && [ "$HOME" = "$PWD" ]; then + cd "$(dirname "$0")" +fi + +exec "$JAVACMD" "$@" diff --git a/gradlew.bat b/gradlew.bat new file mode 100644 index 0000000..24467a1 --- /dev/null +++ b/gradlew.bat @@ -0,0 +1,100 @@ +@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 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 init + +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 init + +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 + +:init +@rem Get command-line arguments, handling Windows variants + +if not "%OS%" == "Windows_NT" goto win9xME_args + +:win9xME_args +@rem Slurp the command line arguments. +set CMD_LINE_ARGS= +set _SKIP=2 + +:win9xME_args_slurp +if "x%~1" == "x" goto execute + +set CMD_LINE_ARGS=%* + +: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 %CMD_LINE_ARGS% + +: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.kts b/settings.gradle.kts new file mode 100644 index 0000000..c4cdce1 --- /dev/null +++ b/settings.gradle.kts @@ -0,0 +1,10 @@ +/* + * This file was generated by the Gradle 'init' task. + * + * The settings file is used to specify which projects to include in your build. + * + * Detailed information about configuring a multi-project build in Gradle can be found + * in the user manual at https://docs.gradle.org/5.6.4/userguide/multi_project_builds.html + */ + +rootProject.name = "music" diff --git a/src/main/kotlin/music/Filter/Filter.kt b/src/main/kotlin/music/Filter/Filter.kt new file mode 100644 index 0000000..3ac22b9 --- /dev/null +++ b/src/main/kotlin/music/Filter/Filter.kt @@ -0,0 +1,38 @@ +package music.Filter + +import music.Params.SAMPLES +import music.Signal + +typealias Filter = (Signal) -> (Signal) + +object Filters { + fun easeIn(signal: Signal): Signal { + val len = kotlin.math.min(SAMPLES / 64, signal.size) + val start = signal.slice(0 until len) + val end = signal.slice(len until signal.size) + + return (start.withIndex().map { i -> (i.value * (i.index / len.toFloat())).toInt() } + end).toTypedArray(); + } + + fun easeOut(signal: Signal): Signal { + val len = kotlin.math.min(SAMPLES / 64, signal.size) + val sep = signal.size - len - 1; + val start = signal.slice(0 until sep) + val end = signal.slice(sep until signal.size) + + return (start + end.withIndex().map { i -> (i.value * ((len - i.index) / len.toFloat())).toInt() }).toTypedArray(); + } + + fun ease(signal: Signal): Signal { + val len = kotlin.math.min(SAMPLES / 64, signal.size / 2) + val sep = signal.size - len - 1; + val start = signal.slice(0 until len) + val mid = signal.slice(len until sep) + val end = signal.slice(sep until signal.size) + + return (start.withIndex().map { i -> (i.value * (i.index / len.toFloat())).toInt() } + + mid + + end.withIndex().map { i -> (i.value * ((len - i.index) / len.toFloat())).toInt() } + ).toTypedArray(); + } +} diff --git a/src/main/kotlin/music/Main.kt b/src/main/kotlin/music/Main.kt new file mode 100644 index 0000000..ebdf114 --- /dev/null +++ b/src/main/kotlin/music/Main.kt @@ -0,0 +1,39 @@ +package music + +import music.Filter.Filters +import music.Params.SAMPLES +import music.generators.Generator +import music.generators.ToneGenerator +import javax.sound.sampled.AudioFormat; +import javax.sound.sampled.AudioSystem; +import javax.sound.sampled.DataLine; +import javax.sound.sampled.SourceDataLine; + +object Params { + val SAMPLES = 44100; + val CORES = Runtime.getRuntime().availableProcessors() + val PI = kotlin.math.PI.toFloat() +} + + +fun main(args: Array) { + + val format = AudioFormat(SAMPLES.toFloat(), 16, 1, true, false) + val info = DataLine.Info( SourceDataLine::class.java, format) + val line = AudioSystem.getLine(info) as SourceDataLine + + line.open(format) + line.start() + + for (i in 0..12) { + + val gen = ToneGenerator(.2f, i, WaveformTransformations::sine) + + + + val signal = Filters.ease(gen.getWave(Samples(1))) + + line.write(signal.toBytes(), 0, signal.size * 2) + } + +} diff --git a/src/main/kotlin/music/Samples.kt b/src/main/kotlin/music/Samples.kt new file mode 100644 index 0000000..0287689 --- /dev/null +++ b/src/main/kotlin/music/Samples.kt @@ -0,0 +1,33 @@ +package music + +import music.Params.SAMPLES + +typealias Samples = Array + +fun Samples(len: Int, start: Int = 0): Samples = + Samples(len * SAMPLES) { i -> start.toFloat() + (i / SAMPLES.toFloat())} + +fun Samples.map(mapper: (Float) -> (Float)): Samples = + Array(size) { mapper(this[it]) } + +fun Samples.ceil(): Samples = + map { kotlin.math.ceil(it) } + +fun Samples.sin(): Samples = + map { kotlin.math.sin(it) } + +fun Samples.mod(num: Int): Samples = + map { it % num } + +operator fun Samples.times(scalar: Float): Samples = + if (scalar == 1f) this else map { it * scalar } + +operator fun Samples.plus(value: Float): Samples = + map { it + value } + +operator fun Samples.minus(value: Float): Samples = + map { it - value } + +operator fun Samples.div(value: Float): Samples = + map { it / value } + diff --git a/src/main/kotlin/music/Signal.kt b/src/main/kotlin/music/Signal.kt new file mode 100644 index 0000000..8a00c04 --- /dev/null +++ b/src/main/kotlin/music/Signal.kt @@ -0,0 +1,31 @@ +package music + +import music.Params.PI +import kotlin.math.pow + + +/** + * A Signal is string of Integer values which describe a curve, they go from - MAX_VAL to MAX_VAL + */ +typealias Signal = Array + +val MAX_VAL = 2f.pow(15) - 1 + +fun Signal.toBytes(): ByteArray = + Array(size * 2) { i -> (this[i/2] shr ((i % 2) * 8)).toByte() }.toByteArray() + +fun Signal(samples: Samples): Signal = + Signal(samples.size) {i -> (samples[i] * MAX_VAL).toInt() } + +object WaveformTransformations { + fun sine(samples: Samples, volume: Float): Signal + = Signal(((samples * (2f * PI)).sin()) * volume) + + fun square(samples: Samples, volume: Float): Signal + = Signal((((samples * (2f * PI)).sin() / 1f).ceil() * 2f + 1f) * volume) + + fun sawtooth(samples: Samples, volume: Float): Signal + = Signal(((samples + 1f).mod(2) - 1f) * volume) +} + +typealias WaveformTransformation = (Samples, Float) -> (Signal) diff --git a/src/main/kotlin/music/Track.kt b/src/main/kotlin/music/Track.kt new file mode 100644 index 0000000..af548c8 --- /dev/null +++ b/src/main/kotlin/music/Track.kt @@ -0,0 +1,5 @@ +package music + +class Track { + +} \ No newline at end of file diff --git a/src/main/kotlin/music/channel/Channel.kt b/src/main/kotlin/music/channel/Channel.kt new file mode 100644 index 0000000..efc53a4 --- /dev/null +++ b/src/main/kotlin/music/channel/Channel.kt @@ -0,0 +1,5 @@ +package music.channel + +class Channel { + +} \ No newline at end of file diff --git a/src/main/kotlin/music/generators/Generator.kt b/src/main/kotlin/music/generators/Generator.kt new file mode 100644 index 0000000..beadab6 --- /dev/null +++ b/src/main/kotlin/music/generators/Generator.kt @@ -0,0 +1,15 @@ +package music.generators + +import music.Samples +import music.Signal +import music.WaveformTransformation + +abstract class Generator(val volume: Float, val waveform: WaveformTransformation) { + + fun getWave(samples: Samples): Signal { + return waveform(generate(samples), volume) + } + + abstract fun generate(samples: Samples): Samples +} + diff --git a/src/main/kotlin/music/generators/ToneGenerator.kt b/src/main/kotlin/music/generators/ToneGenerator.kt new file mode 100644 index 0000000..c919d43 --- /dev/null +++ b/src/main/kotlin/music/generators/ToneGenerator.kt @@ -0,0 +1,22 @@ +package music.generators + +import music.Samples +import music.Signal +import music.WaveformTransformation +import music.times +import kotlin.math.pow + +open class ToneGenerator(volume: Float, private val tone: Int, waveform: WaveformTransformation) : Generator(volume, waveform) { + override fun generate(samples: Samples): Samples = + samples * getFreqOfTone(tone) + + protected fun getFreqOfTone(tone: Float): Float = + F0 * 2f.pow(tone / 12f) + + protected fun getFreqOfTone(tone: Int): Float = + F0 * 2f.pow(tone / 12f) + + companion object { + private const val F0: Float = 440f; + } +} \ No newline at end of file diff --git a/src/test/kotlin/music/AppTest.kt b/src/test/kotlin/music/AppTest.kt new file mode 100644 index 0000000..d99a4f5 --- /dev/null +++ b/src/test/kotlin/music/AppTest.kt @@ -0,0 +1,13 @@ +/* + * This Kotlin source file was generated by the Gradle 'init' task. + */ +package music + +import kotlin.test.Test +import kotlin.test.assertNotNull + +class AppTest { + @Test fun testAppHasAGreeting() { + + } +}