added #letter

abarnhard · Aug 6, 2014 · 07a72f4 · 07a72f4
1 parent 0f165f9
commit 07a72f4
Show file tree

Hide file tree

Showing 2 changed files with 44 additions and 0 deletions.
diff --git a/app/models/student.js b/app/models/student.js
@@ -18,6 +18,23 @@ Student.prototype.avg = function(){
 
 };
 
+Student.prototype.letter = function(){
+  if(!this.tests.length){return 'N/A';}
+
+  var avg = this.avg();
+  if(avg < 60){
+    return 'F';
+  }else if(avg < 70){
+    return 'D';
+  }else if(avg < 80){
+    return 'C';
+  }else if(avg < 90){
+    return 'B';
+  }else{
+    return 'A';
+  }
+};
+
 module.exports = Student;
 
 // Helper Functions

diff --git a/test/unit/student.js b/test/unit/student.js
@@ -26,5 +26,32 @@ describe('Student', function(){
       expect(s1.avg()).to.be.closeTo(75, 0.1);
     });
   });
+  describe('#letter', function(){
+    it('should return A', function(){
+      s1 = new Student({name:'Jim Jones', color:'blue'});
+      s1.tests = [95];
+      expect(s1.letter()).to.equal('A');
+    });
+    it('should return B', function(){
+      s1 = new Student({name:'Jim Jones', color:'blue'});
+      s1.tests = [85];
+      expect(s1.letter()).to.equal('B');
+    });
+    it('should return C', function(){
+      s1 = new Student({name:'Jim Jones', color:'blue'});
+      s1.tests = [75];
+      expect(s1.letter()).to.equal('C');
+    });
+    it('should return D', function(){
+      s1 = new Student({name:'Jim Jones', color:'blue'});
+      s1.tests = [65];
+      expect(s1.letter()).to.equal('D');
+    });
+    it('should return F', function(){
+      s1 = new Student({name:'Jim Jones', color:'blue'});
+      s1.tests = [55];
+      expect(s1.letter()).to.equal('F');
+    });
+  });
 
 });