Add tests on DepthFirstSearch (#299)

Co-authored-by: github-actions <${GITHUB_ACTOR}@users.noreply.github.com>
Co-authored-by: Andrii Siriak <[email protected]>

graph/depthfirstsearch_test.go

@@ -0,0 +1,64 @@
+package graph
+
+import (
+	"reflect"
+	"testing"
+)
+
+func TestDfsWhenPathIsFound(t *testing.T) {
+	nodes := []int{
+		1, 2, 3, 4, 5, 6,
+	}
+
+	//Adjacency Matrix for connected nodes
+	edges := [][]bool{
+		{false, true, true, false, false, false},
+		{true, false, false, true, false, false},
+		{true, false, false, true, false, false},
+		{false, true, true, false, true, false},
+		{false, false, false, true, false, true},
+		{false, false, false, false, true, false},
+	}
+
+	start := 1
+	end := 6
+
+	actual, actualIsFound := DepthFirstSearch(start, end, nodes, edges)
+	expected := []int{1, 3, 4, 5, 6}
+	expectedIsFound := true
+	t.Run("Test Dfs", func(t *testing.T) {
+		if !reflect.DeepEqual(expected, actual) || !reflect.DeepEqual(actualIsFound, expectedIsFound) {
+			t.Errorf("got route: %v, want route: %v", actual, expected)
+			t.Errorf("got isFound: %v, want isFound: %v", actualIsFound, expectedIsFound)
+		}
+	})
+}
+
+func TestDfsWhenPathIsNotFound(t *testing.T) {
+	nodes := []int{
+		1, 2, 3, 4, 5, 6,
+	}
+
+	//Adjacency Matrix for connected nodes
+	edges := [][]bool{
+		{false, true, true, false, false, false},
+		{true, false, false, true, false, false},
+		{true, false, false, true, false, false},
+		{false, true, true, false, true, false},
+		{false, false, false, true, false, true},
+		{false, false, false, false, true, false},
+	}
+
+	start := 1
+	end := 7
+
+	actual, actualIsFound := DepthFirstSearch(start, end, nodes, edges)
+	var expected []int
+	expectedIsFound := false
+	t.Run("Test Dfs", func(t *testing.T) {
+		if !reflect.DeepEqual(expected, actual) || !reflect.DeepEqual(actualIsFound, expectedIsFound) {
+			t.Errorf("got route: %v, want route: %v", actual, expected)
+			t.Errorf("got isFound: %v, want isFound: %v", actualIsFound, expectedIsFound)
+		}
+	})
+}