Use Apache Commons Math for calculations and implement service tests

Implement TestResultService tests and supporting entity builders.
Switch to Apache Commons Math library for descriptive statistics.

1 files changed, 10 insertions, 0 deletions

diff --git a/src/main/java/com/stileeducation/markr/entity/TestResult.java b/src/main/java/com/stileeducation/markr/entity/TestResult.java
index cb7cea5..0d68f62 100644
--- a/src/main/java/com/stileeducation/markr/entity/TestResult.java
+++ b/src/main/java/com/stileeducation/markr/entity/TestResult.java
@@ -8,6 +8,16 @@ import java.util.Objects;
 @Table(name = "test_results")
 public class TestResult {
 
+  public TestResult() {
+  }
+
+  public TestResult(Long id, Student student, Test test, Integer marksAwarded) {
+    this.id = id;
+    this.student = student;
+    this.test = test;
+    this.marksAwarded = marksAwarded;
+  }
+
   @Id
   @GeneratedValue(strategy = GenerationType.IDENTITY)
   private Long id;