From 7f18a66e9840d5713b43cf344531e239716a30f8 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jan=20L=C3=B6wenstrom?= <jan.loewenstrom@web.de>
Date: Thu, 12 Dec 2019 00:20:38 +0100
Subject: [PATCH] add random policy test

---
 .gitignore                               |  4 ++
 gradle/wrapper/gradle-wrapper.properties |  3 +-
 src/test/java/DummyAction.java           |  6 +++
 src/test/java/PolicyTest.java            | 50 ++++++++++++++++++++++++
 4 files changed, 62 insertions(+), 1 deletion(-)
 create mode 100644 src/test/java/DummyAction.java
 create mode 100644 src/test/java/PolicyTest.java

diff --git a/.gitignore b/.gitignore
index 5c3489b..25d1e1c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,7 @@
+.idea/refo.iml
+.idea/misc.xml
+.idea/modules.xml
+
 # Created by .ignore support plugin (hsz.mobi)
 ### JetBrains template
 # Covers JetBrains IDEs: IntelliJ, RubyMine, PhpStorm, AppCode, PyCharm, CLion, Android Studio and WebStorm
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index 44e7c4d..39329ec 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,5 +1,6 @@
+#Wed Dec 11 23:10:59 CET 2019
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-5.2.1-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-5.2.1-all.zip
diff --git a/src/test/java/DummyAction.java b/src/test/java/DummyAction.java
new file mode 100644
index 0000000..c804165
--- /dev/null
+++ b/src/test/java/DummyAction.java
@@ -0,0 +1,6 @@
+public enum DummyAction {
+    UP,
+    DOWN,
+    RIGHT,
+    LEFT
+}
diff --git a/src/test/java/PolicyTest.java b/src/test/java/PolicyTest.java
new file mode 100644
index 0000000..5dfda16
--- /dev/null
+++ b/src/test/java/PolicyTest.java
@@ -0,0 +1,50 @@
+import core.RNG;
+import core.policy.RandomPolicy;
+import org.junit.Test;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+public class PolicyTest {
+
+    private Map<DummyAction, Double> createActionValueMap(){
+        Map<DummyAction, Double> actionValues = new HashMap<>();
+        actionValues.put(DummyAction.UP, 1d);
+        actionValues.put(DummyAction.DOWN, 2d);
+        actionValues.put(DummyAction.LEFT, 3d);
+        actionValues.put(DummyAction.RIGHT, 4d);
+
+        return actionValues;
+    }
+
+    /**
+     * Test if the random policy generates true random results
+     * based upon the static RNG class.
+     */
+    @Test
+    public void RandomPolicyTest(){
+        RandomPolicy<DummyAction> randomPolicy =  new RandomPolicy<>();
+        Map<DummyAction, Double> dummyActionValues = createActionValueMap();
+
+        // dummy action space to choose an action from
+        List<DummyAction> actionList = new ArrayList<>(dummyActionValues.keySet());
+        // list of 100 random selected actions in a row
+        List<DummyAction> chosenActions = new ArrayList<>();
+
+        // randomly selecting an action based upon an index generated from RNG class
+        RNG.setSeed(123);
+        for(int i = 0; i < 100; ++i){
+            int randomPos = RNG.getRandom().nextInt(actionList.size());
+            chosenActions.add(actionList.get(randomPos));
+        }
+
+        // check if all randomly chosen action in the implementation rely
+        // on RNG static class
+        RNG.setSeed(123);
+        for(DummyAction action : chosenActions){
+            assert (action == randomPolicy.chooseAction(dummyActionValues));
+        }
+    }
+}