Update lab 9 content

labs/L09/spec/ancestry.spec.js

@@ -0,0 +1,17 @@
+let by_name=require("../ancestry.js").by_name;
+describe("by_name", function() {
+    it("not-present", function() {
+        expect(by_name("ronald mcdonald")).toBe(null);
+        expect(by_name("Captain Ahab")).toBe(null);
+    });
+    it("first", function () {
+        expect(by_name("Carolus Haverbeke")).toEqual({"name": "Carolus Haverbeke", "sex": "m", "born": 1832, "died": 1905, "father": "Carel Haverbeke", "mother": "Maria van Brussel"});
+    });
+    it("last", function () {
+        expect(by_name("Jacobus Bernardus van Brussel")).toEqual({"name": "Jacobus Bernardus van Brussel", "sex": "m", "born": 1736, "died": 1809, "father": "Jan van Brussel", "mother": "Elisabeth Haverbeke"});
+    });
+    it("middle", function () {
+        expect(by_name("Joanna de Pape")).toEqual(  {"name": "Joanna de Pape", "sex": "f", "born": 1654, "died": 1723, "father": "Vincent de Pape", "mother": "Petronella Wauters"});
+    });
+
+});

labs/L09/spec/loop-arith.spec.js

@@ -1,6 +1,6 @@
 let arith=require ("../loop-arith.js");
 
-describe("add",
+describe("plus",
 	 function() {
 		it("1 + 1 = 2",
 			function() {
@@ -25,6 +25,19 @@ describe("mult",
 			});
 		 it("2 * 2 = 4",
 			function() {
-				expect(arith.mult(2, 2)).toBe(4)
+				expect(arith.mult(2, 2)).toBe(4);
 			});
-	 });
+	 });
+
+describe("minus",
+	 function() {
+		it("1 - 1 = 0",
+			function() {
+				expect(arith.minus(1, 1)).toBe(0);
+			});
+
+		it("0 - x = -x",
+			function() {
+				expect(arith.minus(0, 1)).toBe(-1);
+	 		});
+	});