Wrapping the example matrix with outer array (TheAlgorithms#1057)

Author: tmkasun

Graphs/NumberOfIslands.js

@@ -79,10 +79,3 @@ const islands = (matrixGrid) =>{
 }
 
 export{islands}
-
-// islands(
-// ['1', '1', '0', '0', '0'],
-// ['1', '1', '0', '0', '0'],
-// ['0', '0', '1', '0', '0'],
-// ['0', '0', '0', '1', '1']
-// )

Graphs/test/NumberOfIslands.test.js

@@ -0,0 +1,31 @@
+import{islands}from'../NumberOfIslands'
+
+describe('Number of Islands',()=>{
+test('Graph with three islands',()=>{
+constgraph=[
+['1','1','0','0','0'],
+['1','1','0','0','0'],
+['0','0','1','0','0'],
+['0','0','0','1','1']
+]
+expect(islands(graph)).toBe(3)
+})
+
+test('Graph with only one island',()=>{
+constgraph=[
+['1','1'],
+['1','1'],
+['0','0'],
+['0','0']
+]
+expect(islands(graph)).toBe(1)
+})
+
+test('No islands',()=>{
+constgraph=[
+['0','0'],
+['0','0']
+]
+expect(islands(graph)).toBe(0)
+})
+})