Add the actual test file

unit-testing/main_test.go

@@ -0,0 +1,14 @@
+package main
+
+import (
+	"testing"
+)
+
+func TestGetSquareRoot(t *testing.T) {
+	got := getSquareRoot(49)
+	want := 7
+
+	if got != want {
+		t.Errorf("Got %v, wanted %v\n", got, want)
+	}
+}