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, 50 insertions, 0 deletions

diff --git a/src/test/java/com/stileeducation/markr/util/StudentBuilder.java b/src/test/java/com/stileeducation/markr/util/StudentBuilder.java
new file mode 100644
index 0000000..5189f19
--- /dev/null
+++ b/src/test/java/com/stileeducation/markr/util/StudentBuilder.java
@@ -0,0 +1,50 @@
+package com.stileeducation.markr.util;
+
+import com.stileeducation.markr.entity.Student;
+import com.stileeducation.markr.entity.TestResult;
+
+import java.util.HashSet;
+import java.util.Set;
+
+public class StudentBuilder {
+  private Long id;
+  private String firstName;
+  private String lastName;
+  private String studentNumber;
+  private Set<TestResult> testResults = new HashSet<>();
+
+  public StudentBuilder withId(Long id) {
+    this.id = id;
+    return this;
+  }
+
+  public StudentBuilder withFirstName(String firstName) {
+    this.firstName = firstName;
+    return this;
+  }
+
+  public StudentBuilder withLastName(String lastName) {
+    this.lastName = lastName;
+    return this;
+  }
+
+  public StudentBuilder withStudentNumber(String studentNumber) {
+    this.studentNumber = studentNumber;
+    return this;
+  }
+
+  public StudentBuilder withTestResults(Set<TestResult> testResults) {
+    this.testResults = testResults;
+    return this;
+  }
+
+  public Student build() {
+    Student student = new Student();
+    student.setId(id);
+    student.setFirstName(firstName);
+    student.setLastName(lastName);
+    student.setStudentNumber(studentNumber);
+    student.setTestResults(testResults);
+    return student;
+  }
+}
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