config.repairIntensity cannot be 0, add test

src/main/java/com/spotify/reaper/ReaperApplicationConfiguration.java

@@ -21,8 +21,8 @@
 import java.util.Map;
 
 import javax.validation.Valid;
+import javax.validation.constraints.DecimalMin;
 import javax.validation.constraints.Max;
-import javax.validation.constraints.Min;
 import javax.validation.constraints.NotNull;
 
 import io.dropwizard.Configuration;
@@ -40,7 +40,7 @@ public class ReaperApplicationConfiguration extends Configuration {
 
   @JsonProperty
   @NotNull
-  @Min(0)
+  @DecimalMin(value = "0", inclusive=false)
   @Max(1)
   private Double repairIntensity;
 
@@ -108,6 +108,10 @@ public DataSourceFactory getDataSourceFactory() {
     return database;
   }
 
+  public void setDataSourceFactory(DataSourceFactory database) {
+    this.database = database;
+  }
+
   public int getHangingRepairTimeoutMins() {
     return hangingRepairTimeoutMins;
   }

src/test/java/com/spotify/reaper/ReaperApplicationConfigurationTest.java

@@ -0,0 +1,51 @@
+package com.spotify.reaper;
+
+import org.apache.cassandra.repair.RepairParallelism;
+import org.hibernate.validator.HibernateValidator;
+import org.junit.Before;
+import org.junit.Test;
+
+import javax.validation.Validation;
+import javax.validation.Validator;
+
+import io.dropwizard.db.DataSourceFactory;
+
+import static org.fest.assertions.api.Assertions.assertThat;
+
+public class ReaperApplicationConfigurationTest {
+
+  private final Validator validator = Validation
+      .byProvider(HibernateValidator.class)
+      .configure()
+      .buildValidatorFactory()
+      .getValidator();
+
+  private final ReaperApplicationConfiguration config = new ReaperApplicationConfiguration();
+
+  @Before
+  public void setUp() {
+    //create a valid config
+    DataSourceFactory dataSourceFactory = new DataSourceFactory();
+    dataSourceFactory.setDriverClass("org.postgresql.Driver");
+    dataSourceFactory.setUrl("jdbc:postgresql://db.example.com/db-prod");
+    dataSourceFactory.setUser("user");
+    config.setDataSourceFactory(dataSourceFactory);
+    config.setHangingRepairTimeoutMins(1);
+    config.setRepairParallelism(RepairParallelism.DATACENTER_AWARE);
+    config.setRepairRunThreadCount(1);
+    config.setSegmentCount(1);
+    config.setStorageType("foo");
+  }
+
+  @Test
+  public void testRepairIntensity() {
+    config.setRepairIntensity(-0.1);
+    assertThat(validator.validate(config)).hasSize(1);
+
+    config.setRepairIntensity(0);
+    assertThat(validator.validate(config)).hasSize(1);
+
+    config.setRepairIntensity(1);
+    assertThat(validator.validate(config)).hasSize(0);
+  }
+}