diff --git a/app/src/main/java/info/nightscout/androidaps/interfaces/ConstraintsInterface.java b/app/src/main/java/info/nightscout/androidaps/interfaces/ConstraintsInterface.java
index aac7918bdc..471b7735cf 100644
--- a/app/src/main/java/info/nightscout/androidaps/interfaces/ConstraintsInterface.java
+++ b/app/src/main/java/info/nightscout/androidaps/interfaces/ConstraintsInterface.java
@@ -1,13 +1,13 @@
 package info.nightscout.androidaps.interfaces;
 
-import info.nightscout.androidaps.plugins.Loop.APSResult;
+import info.nightscout.androidaps.interfaces.constrains.BooleanConstraint;
 
 /**
  * Created by mike on 15.06.2016.
  */
 public interface ConstraintsInterface {
 
-    boolean isLoopEnabled();
+    void limitRunningLoop(BooleanConstraint value);
 
     boolean isClosedModeEnabled();
 
diff --git a/app/src/main/java/info/nightscout/androidaps/interfaces/constrains/BooleanConstraint.java b/app/src/main/java/info/nightscout/androidaps/interfaces/constrains/BooleanConstraint.java
new file mode 100644
index 0000000000..eda25b9d68
--- /dev/null
+++ b/app/src/main/java/info/nightscout/androidaps/interfaces/constrains/BooleanConstraint.java
@@ -0,0 +1,29 @@
+package info.nightscout.androidaps.interfaces.constrains;
+
+/**
+ * Created by mike on 19.03.2018.
+ */
+
+public class BooleanConstraint extends Constraint {
+    boolean value;
+
+    public BooleanConstraint(boolean value) {
+        this.value = value;
+    }
+
+    public boolean get() {
+        return value;
+    }
+
+    public BooleanConstraint set(boolean value) {
+        this.value = value;
+        return this;
+    }
+
+    public BooleanConstraint set(boolean value, String reason) {
+        this.value = value;
+        reason(reason);
+        return this;
+    }
+
+}
diff --git a/app/src/main/java/info/nightscout/androidaps/interfaces/constrains/Constraint.java b/app/src/main/java/info/nightscout/androidaps/interfaces/constrains/Constraint.java
new file mode 100644
index 0000000000..4cc4ef7c79
--- /dev/null
+++ b/app/src/main/java/info/nightscout/androidaps/interfaces/constrains/Constraint.java
@@ -0,0 +1,27 @@
+package info.nightscout.androidaps.interfaces.constrains;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Created by mike on 19.03.2018.
+ */
+
+public class Constraint {
+    List<String> reasons = new ArrayList<>();
+
+    public Constraint reason(String reason) {
+        reasons.add(reason);
+        return this;
+    }
+
+    public String getReasons() {
+        StringBuilder sb = new StringBuilder();
+        int count = 0;
+        for (String r: reasons) {
+            if (count++ != 0) sb.append("\n");
+            sb.append(r);
+        }
+        return sb.toString();
+    }
+}
diff --git a/app/src/main/java/info/nightscout/androidaps/interfaces/constrains/DoubleConstraint.java b/app/src/main/java/info/nightscout/androidaps/interfaces/constrains/DoubleConstraint.java
new file mode 100644
index 0000000000..211a545219
--- /dev/null
+++ b/app/src/main/java/info/nightscout/androidaps/interfaces/constrains/DoubleConstraint.java
@@ -0,0 +1,29 @@
+package info.nightscout.androidaps.interfaces.constrains;
+
+/**
+ * Created by mike on 19.03.2018.
+ */
+
+public class DoubleConstraint extends Constraint{
+    double value;
+
+    public DoubleConstraint(double value) {
+        this.value = value;
+    }
+
+    public Double getDouble() {
+        return value;
+    }
+
+    public DoubleConstraint set(double value) {
+        this.value = value;
+        return this;
+    }
+
+    public DoubleConstraint set(double value, String reason) {
+        this.value = value;
+        reason(reason);
+        return this;
+    }
+
+}
diff --git a/app/src/main/java/info/nightscout/androidaps/interfaces/constrains/IntegerConstraint.java b/app/src/main/java/info/nightscout/androidaps/interfaces/constrains/IntegerConstraint.java
new file mode 100644
index 0000000000..31d2a76e82
--- /dev/null
+++ b/app/src/main/java/info/nightscout/androidaps/interfaces/constrains/IntegerConstraint.java
@@ -0,0 +1,28 @@
+package info.nightscout.androidaps.interfaces.constrains;
+
+/**
+ * Created by mike on 19.03.2018.
+ */
+
+public class IntegerConstraint extends Constraint {
+    int value;
+
+    public IntegerConstraint(int value) {
+        this.value = value;
+    }
+
+    public int getInteger() {
+        return value;
+    }
+
+    public IntegerConstraint set(int value) {
+        this.value = value;
+        return this;
+    }
+
+    public IntegerConstraint set(int value, String reason) {
+        this.value = value;
+        reason(reason);
+        return this;
+    }
+}
diff --git a/app/src/main/java/info/nightscout/androidaps/plugins/ConfigBuilder/ConfigBuilderPlugin.java b/app/src/main/java/info/nightscout/androidaps/plugins/ConfigBuilder/ConfigBuilderPlugin.java
index e0a8155ffa..3f5283ec48 100644
--- a/app/src/main/java/info/nightscout/androidaps/plugins/ConfigBuilder/ConfigBuilderPlugin.java
+++ b/app/src/main/java/info/nightscout/androidaps/plugins/ConfigBuilder/ConfigBuilderPlugin.java
@@ -4,8 +4,6 @@ import android.content.SharedPreferences;
 import android.preference.PreferenceManager;
 import android.support.annotation.Nullable;
 
-import org.json.JSONException;
-import org.json.JSONObject;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -33,6 +31,7 @@ import info.nightscout.androidaps.db.Treatment;
 import info.nightscout.androidaps.events.EventAppInitialized;
 import info.nightscout.androidaps.interfaces.APSInterface;
 import info.nightscout.androidaps.interfaces.BgSourceInterface;
+import info.nightscout.androidaps.interfaces.constrains.BooleanConstraint;
 import info.nightscout.androidaps.interfaces.ConstraintsInterface;
 import info.nightscout.androidaps.interfaces.InsulinInterface;
 import info.nightscout.androidaps.interfaces.PluginBase;
@@ -43,7 +42,6 @@ import info.nightscout.androidaps.interfaces.TreatmentsInterface;
 import info.nightscout.androidaps.plugins.Loop.APSResult;
 import info.nightscout.androidaps.plugins.Loop.LoopPlugin;
 import info.nightscout.androidaps.plugins.Overview.events.EventDismissNotification;
-import info.nightscout.androidaps.plugins.Overview.events.EventNewNotification;
 import info.nightscout.androidaps.plugins.Overview.notifications.Notification;
 import info.nightscout.androidaps.plugins.PumpVirtual.VirtualPumpPlugin;
 import info.nightscout.androidaps.queue.Callback;
@@ -451,16 +449,14 @@ public class ConfigBuilderPlugin implements PluginBase, ConstraintsInterface, Tr
      * Constraints interface
      **/
     @Override
-    public boolean isLoopEnabled() {
-        boolean result = true;
+    public void limitRunningLoop(BooleanConstraint value) {
 
         ArrayList<PluginBase> constraintsPlugins = MainApp.getSpecificPluginsListByInterface(ConstraintsInterface.class);
         for (PluginBase p : constraintsPlugins) {
             ConstraintsInterface constrain = (ConstraintsInterface) p;
             if (!p.isEnabled(PluginBase.CONSTRAINTS)) continue;
-            result = result && constrain.isLoopEnabled();
+            constrain.limitRunningLoop(value);
         }
-        return result;
     }
 
     @Override
diff --git a/app/src/main/java/info/nightscout/androidaps/plugins/ConstraintsObjectives/ObjectivesPlugin.java b/app/src/main/java/info/nightscout/androidaps/plugins/ConstraintsObjectives/ObjectivesPlugin.java
index 3b0891680d..0516cdda51 100644
--- a/app/src/main/java/info/nightscout/androidaps/plugins/ConstraintsObjectives/ObjectivesPlugin.java
+++ b/app/src/main/java/info/nightscout/androidaps/plugins/ConstraintsObjectives/ObjectivesPlugin.java
@@ -10,12 +10,12 @@ import java.util.ArrayList;
 import java.util.Date;
 import java.util.List;
 
-import info.nightscout.androidaps.BuildConfig;
 import info.nightscout.androidaps.Config;
 import info.nightscout.androidaps.MainApp;
 import info.nightscout.androidaps.R;
 import info.nightscout.androidaps.db.DatabaseHelper;
 import info.nightscout.androidaps.interfaces.APSInterface;
+import info.nightscout.androidaps.interfaces.constrains.BooleanConstraint;
 import info.nightscout.androidaps.interfaces.ConstraintsInterface;
 import info.nightscout.androidaps.interfaces.PluginBase;
 import info.nightscout.androidaps.plugins.ConfigBuilder.ConfigBuilderPlugin;
@@ -294,8 +294,9 @@ public class ObjectivesPlugin implements PluginBase, ConstraintsInterface {
      * Constraints interface
      **/
     @Override
-    public boolean isLoopEnabled() {
-        return objectives.get(0).started.getTime() > 0;
+    public void limitRunningLoop(BooleanConstraint value) {
+        if (objectives.get(0).started.getTime() == 0)
+            value.set(false, MainApp.gs(R.string.objective1notstarted));
     }
 
     @Override
diff --git a/app/src/main/java/info/nightscout/androidaps/plugins/ConstraintsSafety/SafetyPlugin.java b/app/src/main/java/info/nightscout/androidaps/plugins/ConstraintsSafety/SafetyPlugin.java
index 41a7c1eb00..4062836c48 100644
--- a/app/src/main/java/info/nightscout/androidaps/plugins/ConstraintsSafety/SafetyPlugin.java
+++ b/app/src/main/java/info/nightscout/androidaps/plugins/ConstraintsSafety/SafetyPlugin.java
@@ -11,6 +11,7 @@ import info.nightscout.androidaps.Constants;
 import info.nightscout.androidaps.MainApp;
 import info.nightscout.androidaps.R;
 import info.nightscout.androidaps.data.Profile;
+import info.nightscout.androidaps.interfaces.constrains.BooleanConstraint;
 import info.nightscout.androidaps.interfaces.ConstraintsInterface;
 import info.nightscout.androidaps.interfaces.PluginBase;
 import info.nightscout.androidaps.plugins.ConfigBuilder.ConfigBuilderPlugin;
@@ -93,8 +94,9 @@ public class SafetyPlugin implements PluginBase, ConstraintsInterface {
     }
 
     @Override
-    public boolean isLoopEnabled() {
-        return ConfigBuilderPlugin.getActivePump().getPumpDescription().isTempBasalCapable;
+    public void limitRunningLoop(BooleanConstraint value) {
+        if (!ConfigBuilderPlugin.getActivePump().getPumpDescription().isTempBasalCapable)
+            value.set(false, MainApp.gs(R.string.pumpisnottempbasalcapable));
     }
 
     /**
diff --git a/app/src/main/java/info/nightscout/androidaps/plugins/Loop/LoopPlugin.java b/app/src/main/java/info/nightscout/androidaps/plugins/Loop/LoopPlugin.java
index 5846140b1e..a1ca643adc 100644
--- a/app/src/main/java/info/nightscout/androidaps/plugins/Loop/LoopPlugin.java
+++ b/app/src/main/java/info/nightscout/androidaps/plugins/Loop/LoopPlugin.java
@@ -23,11 +23,10 @@ import info.nightscout.androidaps.MainApp;
 import info.nightscout.androidaps.R;
 import info.nightscout.androidaps.data.Profile;
 import info.nightscout.androidaps.data.PumpEnactResult;
-import info.nightscout.androidaps.db.BgReading;
 import info.nightscout.androidaps.events.EventNewBG;
 import info.nightscout.androidaps.events.EventTreatmentChange;
 import info.nightscout.androidaps.interfaces.APSInterface;
-import info.nightscout.androidaps.interfaces.ConstraintsInterface;
+import info.nightscout.androidaps.interfaces.constrains.BooleanConstraint;
 import info.nightscout.androidaps.interfaces.PluginBase;
 import info.nightscout.androidaps.interfaces.PumpInterface;
 import info.nightscout.androidaps.plugins.ConfigBuilder.ConfigBuilderPlugin;
@@ -260,10 +259,13 @@ public class LoopPlugin implements PluginBase {
         try {
             if (Config.logFunctionCalls)
                 log.debug("invoke from " + initiator);
-            ConstraintsInterface constraintsInterface = MainApp.getConfigBuilder();
-            if (!constraintsInterface.isLoopEnabled()) {
-                log.debug(MainApp.sResources.getString(R.string.loopdisabled));
-                MainApp.bus().post(new EventLoopSetLastRunGui(MainApp.sResources.getString(R.string.loopdisabled)));
+            BooleanConstraint loopEnabled = new BooleanConstraint(true);
+            MainApp.getConfigBuilder().limitRunningLoop(loopEnabled);
+
+            if (!loopEnabled.get()) {
+                String message = MainApp.sResources.getString(R.string.loopdisabled) + "\n" + loopEnabled.getReasons();
+                log.debug(message);
+                MainApp.bus().post(new EventLoopSetLastRunGui(message));
                 return;
             }
             final PumpInterface pump = ConfigBuilderPlugin.getActivePump();
@@ -297,8 +299,8 @@ public class LoopPlugin implements PluginBase {
 
             // check rate for constrais
             final APSResult resultAfterConstraints = result.clone();
-            resultAfterConstraints.rate = constraintsInterface.applyBasalConstraints(resultAfterConstraints.rate);
-            resultAfterConstraints.smb = constraintsInterface.applyBolusConstraints(resultAfterConstraints.smb);
+            resultAfterConstraints.rate = MainApp.getConfigBuilder().applyBasalConstraints(resultAfterConstraints.rate);
+            resultAfterConstraints.smb = MainApp.getConfigBuilder().applyBolusConstraints(resultAfterConstraints.smb);
 
             // safety check for multiple SMBs
             long lastBolusTime = TreatmentsPlugin.getPlugin().getLastBolusTime();
@@ -329,7 +331,7 @@ public class LoopPlugin implements PluginBase {
                 return;
             }
 
-            if (constraintsInterface.isClosedModeEnabled()) {
+            if (MainApp.getConfigBuilder().isClosedModeEnabled()) {
                 if (result.isChangeRequested()) {
                     final PumpEnactResult waiting = new PumpEnactResult();
                     waiting.queued = true;
diff --git a/app/src/main/java/info/nightscout/androidaps/plugins/PumpCombo/ComboPlugin.java b/app/src/main/java/info/nightscout/androidaps/plugins/PumpCombo/ComboPlugin.java
index ee3a32ad7e..5d60498b32 100644
--- a/app/src/main/java/info/nightscout/androidaps/plugins/PumpCombo/ComboPlugin.java
+++ b/app/src/main/java/info/nightscout/androidaps/plugins/PumpCombo/ComboPlugin.java
@@ -4,7 +4,6 @@ import android.os.SystemClock;
 import android.support.annotation.NonNull;
 import android.support.annotation.Nullable;
 
-import com.crashlytics.android.answers.Answers;
 import com.crashlytics.android.answers.CustomEvent;
 
 import org.json.JSONObject;
@@ -29,6 +28,7 @@ import info.nightscout.androidaps.db.TemporaryBasal;
 import info.nightscout.androidaps.db.Treatment;
 import info.nightscout.androidaps.events.EventInitializationChanged;
 import info.nightscout.androidaps.events.EventRefreshOverview;
+import info.nightscout.androidaps.interfaces.constrains.BooleanConstraint;
 import info.nightscout.androidaps.interfaces.ConstraintsInterface;
 import info.nightscout.androidaps.interfaces.PluginBase;
 import info.nightscout.androidaps.interfaces.PumpDescription;
@@ -1407,8 +1407,9 @@ public class ComboPlugin implements PluginBase, PumpInterface, ConstraintsInterf
     private boolean validBasalRateProfileSelectedOnPump = true;
 
     @Override
-    public boolean isLoopEnabled() {
-        return validBasalRateProfileSelectedOnPump;
+    public void limitRunningLoop(BooleanConstraint value) {
+        if (!validBasalRateProfileSelectedOnPump)
+            value.set(false, MainApp.gs(R.string.novalidbasalrate));
     }
 
     @Override
diff --git a/app/src/main/java/info/nightscout/androidaps/plugins/PumpDanaR/AbstractDanaRPlugin.java b/app/src/main/java/info/nightscout/androidaps/plugins/PumpDanaR/AbstractDanaRPlugin.java
index b57b8543f4..111919c47d 100644
--- a/app/src/main/java/info/nightscout/androidaps/plugins/PumpDanaR/AbstractDanaRPlugin.java
+++ b/app/src/main/java/info/nightscout/androidaps/plugins/PumpDanaR/AbstractDanaRPlugin.java
@@ -19,6 +19,7 @@ import info.nightscout.androidaps.data.ProfileStore;
 import info.nightscout.androidaps.data.PumpEnactResult;
 import info.nightscout.androidaps.db.ExtendedBolus;
 import info.nightscout.androidaps.db.TemporaryBasal;
+import info.nightscout.androidaps.interfaces.constrains.BooleanConstraint;
 import info.nightscout.androidaps.interfaces.ConstraintsInterface;
 import info.nightscout.androidaps.interfaces.DanaRInterface;
 import info.nightscout.androidaps.interfaces.PluginBase;
@@ -436,8 +437,7 @@ public abstract class AbstractDanaRPlugin implements PluginBase, PumpInterface,
      */
 
     @Override
-    public boolean isLoopEnabled() {
-        return true;
+    public void limitRunningLoop(BooleanConstraint value) {
     }
 
     @Override
diff --git a/app/src/main/java/info/nightscout/androidaps/plugins/PumpDanaRS/DanaRSPlugin.java b/app/src/main/java/info/nightscout/androidaps/plugins/PumpDanaRS/DanaRSPlugin.java
index 48838117c6..1bc785352d 100644
--- a/app/src/main/java/info/nightscout/androidaps/plugins/PumpDanaRS/DanaRSPlugin.java
+++ b/app/src/main/java/info/nightscout/androidaps/plugins/PumpDanaRS/DanaRSPlugin.java
@@ -30,6 +30,7 @@ import info.nightscout.androidaps.db.ExtendedBolus;
 import info.nightscout.androidaps.db.TemporaryBasal;
 import info.nightscout.androidaps.db.Treatment;
 import info.nightscout.androidaps.events.EventAppExit;
+import info.nightscout.androidaps.interfaces.constrains.BooleanConstraint;
 import info.nightscout.androidaps.interfaces.ConstraintsInterface;
 import info.nightscout.androidaps.interfaces.DanaRInterface;
 import info.nightscout.androidaps.interfaces.PluginBase;
@@ -274,8 +275,7 @@ public class DanaRSPlugin implements PluginBase, PumpInterface, DanaRInterface,
     // Constraints interface
 
     @Override
-    public boolean isLoopEnabled() {
-        return true;
+    public void limitRunningLoop(BooleanConstraint value) {
     }
 
     @Override
diff --git a/app/src/main/java/info/nightscout/androidaps/plugins/PumpInsight/InsightPumpPlugin.java b/app/src/main/java/info/nightscout/androidaps/plugins/PumpInsight/InsightPumpPlugin.java
index a7c7cb52f4..9889c9723c 100644
--- a/app/src/main/java/info/nightscout/androidaps/plugins/PumpInsight/InsightPumpPlugin.java
+++ b/app/src/main/java/info/nightscout/androidaps/plugins/PumpInsight/InsightPumpPlugin.java
@@ -1,10 +1,5 @@
 package info.nightscout.androidaps.plugins.PumpInsight;
 
-import android.os.Handler;
-import android.util.Log;
-
-import com.j256.ormlite.stmt.query.In;
-
 import org.json.JSONException;
 import org.json.JSONObject;
 import org.slf4j.Logger;
@@ -27,11 +22,11 @@ import info.nightscout.androidaps.db.ExtendedBolus;
 import info.nightscout.androidaps.db.Source;
 import info.nightscout.androidaps.db.TemporaryBasal;
 import info.nightscout.androidaps.db.Treatment;
+import info.nightscout.androidaps.interfaces.constrains.BooleanConstraint;
 import info.nightscout.androidaps.interfaces.ConstraintsInterface;
 import info.nightscout.androidaps.interfaces.PluginBase;
 import info.nightscout.androidaps.interfaces.PumpDescription;
 import info.nightscout.androidaps.interfaces.PumpInterface;
-import info.nightscout.androidaps.plugins.Overview.events.EventDismissBolusprogressIfRunning;
 import info.nightscout.androidaps.plugins.Overview.events.EventDismissNotification;
 import info.nightscout.androidaps.plugins.Overview.events.EventNewNotification;
 import info.nightscout.androidaps.plugins.Overview.events.EventOverviewBolusProgress;
@@ -1085,8 +1080,7 @@ public class InsightPumpPlugin implements PluginBase, PumpInterface, Constraints
     // Constraints
 
     @Override
-    public boolean isLoopEnabled() {
-        return true;
+    public void limitRunningLoop(BooleanConstraint value){
     }
 
     @Override
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 6c1a0b774a..b6c7783ece 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -1011,5 +1011,8 @@
     <string name="profileswitch_ismissing">ProfileSwitch missing. Please do a profile switch or press \"Activate Profile\" in the LocalProfile.</string>
     <string name="combo_bolus_count">Bolus count</string>
     <string name="combo_tbr_count">TBR count</string>
+    <string name="objective1notstarted">Objective 1 not started</string>
+    <string name="pumpisnottempbasalcapable">Pump is not temp basal capable</string>
+    <string name="novalidbasalrate">No valid basal rate read from pump</string>
 </resources>
 
diff --git a/app/src/test/java/info/nightscout/androidaps/interfaces/contraints/BooleanConstraintTest.java b/app/src/test/java/info/nightscout/androidaps/interfaces/contraints/BooleanConstraintTest.java
new file mode 100644
index 0000000000..610f3f5519
--- /dev/null
+++ b/app/src/test/java/info/nightscout/androidaps/interfaces/contraints/BooleanConstraintTest.java
@@ -0,0 +1,32 @@
+package info.nightscout.androidaps.interfaces.contraints;
+
+import junit.framework.Assert;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.powermock.modules.junit4.PowerMockRunner;
+
+import info.nightscout.androidaps.interfaces.constrains.BooleanConstraint;
+
+/**
+ * Created by mike on 19.03.2018.
+ */
+
+@RunWith(PowerMockRunner.class)
+public class BooleanConstraintTest {
+
+    @Test
+    public void doTests() throws Exception {
+        BooleanConstraint c;
+
+        c = new BooleanConstraint(true);
+        Assert.assertEquals(true, c.get());
+        Assert.assertEquals("", c.getReasons());
+        c.set(false);
+        Assert.assertEquals(false, c.get());
+        Assert.assertEquals("", c.getReasons());
+        c.set(true, "Set true");
+        Assert.assertEquals(true, c.get());
+        Assert.assertEquals("Set true", c.getReasons());
+    }
+}
diff --git a/app/src/test/java/info/nightscout/androidaps/interfaces/contraints/DoubleConstraintTest.java b/app/src/test/java/info/nightscout/androidaps/interfaces/contraints/DoubleConstraintTest.java
new file mode 100644
index 0000000000..b99376b033
--- /dev/null
+++ b/app/src/test/java/info/nightscout/androidaps/interfaces/contraints/DoubleConstraintTest.java
@@ -0,0 +1,36 @@
+package info.nightscout.androidaps.interfaces.contraints;
+
+import junit.framework.Assert;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.powermock.modules.junit4.PowerMockRunner;
+
+import info.nightscout.androidaps.interfaces.constrains.DoubleConstraint;
+
+/**
+ * Created by mike on 19.03.2018.
+ */
+
+@RunWith(PowerMockRunner.class)
+public class DoubleConstraintTest {
+
+    @Test
+    public void doTests() throws Exception {
+        DoubleConstraint c;
+
+        c = new DoubleConstraint(10d);
+        Assert.assertEquals(10d, c.getDouble());
+        Assert.assertEquals("", c.getReasons());
+        c.set(11d);
+        Assert.assertEquals(11d, c.getDouble());
+        Assert.assertEquals("", c.getReasons());
+        c.set(9d, "Set 9d");
+        Assert.assertEquals(9d, c.getDouble());
+        Assert.assertEquals("Set 9d", c.getReasons());
+        c.set(8d, "Set 8d");
+        Assert.assertEquals(8d, c.getDouble());
+        Assert.assertEquals("Set 9d\nSet 8d", c.getReasons());
+
+    }
+}
diff --git a/app/src/test/java/info/nightscout/androidaps/interfaces/contraints/IntegerConstraintTest.java b/app/src/test/java/info/nightscout/androidaps/interfaces/contraints/IntegerConstraintTest.java
new file mode 100644
index 0000000000..910021e305
--- /dev/null
+++ b/app/src/test/java/info/nightscout/androidaps/interfaces/contraints/IntegerConstraintTest.java
@@ -0,0 +1,34 @@
+package info.nightscout.androidaps.interfaces.contraints;
+
+import junit.framework.Assert;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.powermock.modules.junit4.PowerMockRunner;
+
+import info.nightscout.androidaps.interfaces.constrains.BooleanConstraint;
+import info.nightscout.androidaps.interfaces.constrains.IntegerConstraint;
+
+/**
+ * Created by mike on 19.03.2018.
+ */
+
+@RunWith(PowerMockRunner.class)
+public class IntegerConstraintTest {
+
+    @Test
+    public void doTests() throws Exception {
+        IntegerConstraint c;
+
+        c = new IntegerConstraint(10);
+        Assert.assertEquals(10, c.getInteger());
+        Assert.assertEquals("", c.getReasons());
+        c.set(11);
+        Assert.assertEquals(11, c.getInteger());
+        Assert.assertEquals("", c.getReasons());
+        c.set(9, "Set 9");
+        Assert.assertEquals(9, c.getInteger());
+        Assert.assertEquals("Set 9", c.getReasons());
+
+    }
+}