erik/cryptoprice
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Erik C. Thauvin 2021-05-08 01:35:55 -07:00
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.gitattributes vendored Normal file
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# Set the default behavior, in case people don't have core.autocrlf set.
* text=auto
# batch files are specific to windows and always crlf
*.bat eol=crlf

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!.vscode/extensions.json
!.vscode/launch.json
!.vscode/settings.json
!.vscode/tasks.json
*.class
*.code-workspace
*.ctxt
*.iws
*.log
*.nar
*.rar
*.sublime-*
*.tar.gz
*.zip
.DS_Store
.classpath
.gradle
.history
.kobalt
.mtj.tmp/
.mvn/timing.properties
.mvn/wrapper/maven-wrapper.jar
.nb-gradle
.project
.scannerwork
.settings
.vscode/*
/**/.idea/$CACHE_FILE$
/**/.idea/$PRODUCT_WORKSPACE_FILE$
/**/.idea/**/caches/build_file_checksums.ser
/**/.idea/**/contentModel.xml
/**/.idea/**/dataSources.ids
/**/.idea/**/dataSources.local.xml
/**/.idea/**/dataSources/
/**/.idea/**/dbnavigator.xml
/**/.idea/**/dictionaries
/**/.idea/**/dynamic.xml
/**/.idea/**/gradle.xml
/**/.idea/**/httpRequests
/**/.idea/**/libraries
/**/.idea/**/mongoSettings.xml
/**/.idea/**/replstate.xml
/**/.idea/**/shelf
/**/.idea/**/shelf/
/**/.idea/**/sqlDataSources.xml
/**/.idea/**/tasks.xml
/**/.idea/**/uiDesigner.xml
/**/.idea/**/usage.statistics.xml
/**/.idea/**/workspace.xml
/**/.idea_modules/
Thumbs.db
__pycache__
atlassian-ide-plugin.xml
bin/
build/
cmake-build-*/
com_crashlytics_export_strings.xml
crashlytics-build.properties
crashlytics.properties
dependency-reduced-pom.xml
deploy/
dist/
ehthumbs.db
fabric.properties
gen/
gradle.properties
hs_err_pid*
kobaltBuild
kobaltw*-test
lib/kotlin*
libs/
local.properties
out/
pom.xml.asc
pom.xml.next
pom.xml.releaseBackup
pom.xml.tag
pom.xml.versionsBackup
proguard-project.txt
project.properties
release.properties
target/
test-output
venv

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LICENSE.txt Normal file
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Copyright (c) 2021, Erik C. Thauvin (erik@thauvin.net)
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
* Redistributions of source code must retain the above copyright notice, this
list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright notice,
this list of conditions and the following disclaimer in the documentation
and/or other materials provided with the distribution.
* Neither the name of this project nor the names of its contributors may be
used to endorse or promote products derived from this software without
specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

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baseline.xml Normal file
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<?xml version="1.0" ?>
<SmellBaseline>
<ManuallySuppressedIssues></ManuallySuppressedIssues>
<CurrentIssues>
<ID>ThrowsCount:CryptoPrice.kt$CryptoPrice.Companion$ @JvmStatic @JvmOverloads @Throws(CryptoException::class) fun apiCall(paths: List&lt;String&gt;, params: Map&lt;String, String&gt; = emptyMap()): String</ID>
<ID>UtilityClassWithPublicConstructor:CryptoPrice.kt$CryptoPrice</ID>
</CurrentIssues>
</SmellBaseline>

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build.gradle.kts Normal file
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plugins {
id("com.github.ben-manes.versions") version "0.38.0"
id("io.gitlab.arturbosch.detekt") version "1.17.0-RC1"
kotlin("jvm") version "1.5.0"
application
}
defaultTasks(ApplicationPlugin.TASK_RUN_NAME)
repositories {
mavenCentral()
maven { url = uri("https://oss.sonatype.org/content/repositories/snapshots") }
}
dependencies {
implementation(platform("org.jetbrains.kotlin:kotlin-bom"))
implementation("org.jetbrains.kotlin:kotlin-stdlib-jdk8")
implementation("com.squareup.okhttp3:okhttp:4.9.1")
implementation("org.json:json:20210307")
testImplementation("org.jetbrains.kotlin:kotlin-test")
testImplementation("org.jetbrains.kotlin:kotlin-test-junit")
}
application {
mainClassName = "net.thauvin.erik.crypto.CryptoPrice"
}
detekt {
toolVersion = "main-SNAPSHOT"
}

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gradle/wrapper/gradle-wrapper.jar vendored Normal file
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gradle/wrapper/gradle-wrapper.properties vendored Normal file
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distributionBase=GRADLE_USER_HOME
distributionPath=wrapper/dists
distributionUrl=https\://services.gradle.org/distributions/gradle-7.0-bin.zip
zipStoreBase=GRADLE_USER_HOME
zipStorePath=wrapper/dists

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#!/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=`expr $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"
exec "$JAVACMD" "$@"

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@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

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/*
* 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/7.0/userguide/multi_project_builds.html
*/
rootProject.name = "CryptoPrice"

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src/main/kotlin/net/thauvin/erik/crypto/CryptoException.kt Normal file
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/*
* CryptoExtension.kt
*
* Copyright (c) 2021, Erik C. Thauvin (erik@thauvin.net)
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* Neither the name of this project nor the names of its contributors may be
* used to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package net.thauvin.erik.crypto
@Suppress("EmptySecondaryConstructor")
class CryptoException : Exception {
constructor(message: String, cause: Throwable) : super(message, cause) {}
constructor(message: String) : super(message) {}
constructor(cause: Throwable) : super(cause) {}
companion object {
private const val serialVersionUID = 1L
}
}

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src/main/kotlin/net/thauvin/erik/crypto/CryptoPrice.kt Normal file
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/*
* CryptoPrice.kt
*
* Copyright (c) 2021, Erik C. Thauvin (erik@thauvin.net)
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* Neither the name of this project nor the names of its contributors may be
* used to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package net.thauvin.erik.crypto
import okhttp3.HttpUrl.Companion.toHttpUrl
import okhttp3.OkHttpClient
import okhttp3.Request
import org.json.JSONObject
import java.io.IOException
import java.net.URL
import java.time.LocalDate
data class Price(val base: String, val currency: String, val amount: Double)
open class CryptoPrice private constructor() {
companion object {
// Coinbase API URL
private const val COINBASE_API_URL = "https://api.coinbase.com/v2/"
/**
* Make an API call.
*/
@JvmStatic
@JvmOverloads
@Throws(CryptoException::class)
fun apiCall(paths: List<String>, params: Map<String, String> = emptyMap()): String {
val client = OkHttpClient()
val url = COINBASE_API_URL.toHttpUrl().newBuilder()
paths.forEach {
url.addPathSegment(it)
}
params.forEach {
url.addQueryParameter(it.key, it.value)
}
val request = Request.Builder().url(url.build()).build()
val response = client.newCall(request).execute()
val body = response.body?.string()
if (body != null) {
val json = JSONObject(body)
if (!response.isSuccessful) {
if (json.has("errors")) {
val data = json.getJSONArray("errors")
throw CryptoException(data.getJSONObject(0).getString("message"))
} else {
throw CryptoException("Invalid API response. (${response.code}")
}
} else {
return body
}
} else {
throw CryptoException("Empty API response.")
}
}
@JvmStatic
fun main(args: Array<String>) {
val price = marketPrice("BTC")
println("BTC: ${price.amount}")
}
/**
* Retrieves the current market price.
*/
@JvmStatic
@JvmOverloads
@Throws(CryptoException::class)
fun marketPrice(base: String, currency: String = "USD", date: LocalDate? = null): Price {
val params = mutableMapOf<String, String>()
if (date != null) {
params.put("date", "$date")
}
val body = apiCall(listOf("prices", "$base-$currency", "spot"), params)
val json = JSONObject(body)
if (json.has("data")) {
val data = json.getJSONObject("data")
return Price(data.getString("base"), data.getString("currency"), data.getString("amount").toDouble())
} else {
throw CryptoException("Missing JSON data.")
}
}
}
}

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src/test/kotlin/net/thauvin/erik/cryptoprice/CryptoPriceTest.kt Normal file
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package net.thauvin.erik.crypto
import net.thauvin.erik.crypto.CryptoPrice.Companion.marketPrice
import kotlin.test.Test
import kotlin.test.assertEquals
import kotlin.test.assertFailsWith
import kotlin.test.assertTrue
import java.time.LocalDate
/**
* The `CryptoPriceTest` class.
*/
class CryptoPriceTest {
@Test
@Throws(CryptoException::class)
fun testBTCPrice() {
val price = marketPrice("BTC")
assertEquals(price.base, "BTC", "BTC")
assertEquals(price.currency, "USD", "is USD")
assertTrue(price.amount > 0.00, "BTC > 0")
}
@Test
@Throws(CryptoException::class)
fun testETHPrice() {
val price = marketPrice("ETH", "EUR")
assertEquals(price.base, "ETH", "ETH")
assertEquals(price.currency, "EUR", "is EUR")
assertTrue(price.amount > 0.00, "ETH > 0")
}
@Test
@Throws(CryptoException::class)
fun testETH2Price() {
val price = marketPrice("ETH2", "GBP")
assertEquals(price.base, "ETH2", "ETH2")
assertEquals(price.currency, "GBP", "is GBP")
assertTrue(price.amount > 0.00, "GBP > 0")
}
@Test
@Throws(CryptoException::class)
fun testBCHPrice() {
val price = marketPrice("BCH", "GBP", LocalDate.now().minusDays(1))
assertEquals(price.base, "BCH", "ETH2")
assertEquals(price.currency, "GBP", "is GBP")
assertTrue(price.amount > 0.00, "BCH > 0")
}
@Test
@Throws(CryptoException::class)
fun testMarketPriceExceptions() {
assertFailsWith(
message = "FOO did not fail",
exceptionClass = CryptoException::class,
block = { marketPrice("FOO") }
)
assertFailsWith(
message = "BAR did not fail",
exceptionClass = CryptoException::class,
block = { marketPrice("BTC", "BAR") }
)
}
}