Add unit tests to Max Consecutive 1s problem

LeoSL · LeoSL · commit 1ff3d5294197 · 2019-10-03T20:50:07.000-04:00
diff --git a/src/_Problems_/max-consecutive-1s/index.js b/src/_Problems_/max-consecutive-1s/index.js
@@ -22,3 +22,5 @@ function findMaxConsecutive1s(arr) {
   if (count > max) max = count;
   return max;
 }
+
+module.exports = { findMaxConsecutive1s };
diff --git a/src/_Problems_/max-consecutive-1s/max-consecutive-1s.test.js b/src/_Problems_/max-consecutive-1s/max-consecutive-1s.test.js
@@ -0,0 +1,20 @@
+const { findMaxConsecutive1s } = require(".");
+
+describe("Find maximum numbers of consecutive 1s", () => {
+  it("returns 1 if there is only one number 1", () => {
+    expect(findMaxConsecutive1s([1])).toEqual(1);
+  });
+
+  it("return the appropriate count for a large array", () => {
+    const largeArray = [0, 1, 0, 0, 1, 1, 1, 0, 1, 1, 1, 1, 1];
+    expect(findMaxConsecutive1s(largeArray)).toEqual(5);
+  });
+
+  it("returns count 0 if there is no number 1", () => {
+    expect(findMaxConsecutive1s([0, 2, 3, 9, 0])).toEqual(0);
+  });
+
+  it("does NOT count negative 1s", () => {
+    expect(findMaxConsecutive1s([1, 1, 0, -1, -1, -1])).toEqual(2);
+  });
+});

Original file line number	Diff line number	Diff line change
`@@ -22,3 +22,5 @@ function findMaxConsecutive1s(arr) {`
`22`	`22`	`if (count > max) max = count;`
`23`	`23`	`return max;`
`24`	`24`	`}`
	`25`	`+`
	`26`	`+module.exports = { findMaxConsecutive1s };`