Add some config tests

Still some more to add

config_test.go

@@ -0,0 +1,30 @@
+package main
+
+import (
+	"log"
+	"testing"
+)
+
+func TestLoadConfig(t *testing.T) {
+	cases := []struct {
+		configPath string
+		expectErr  bool
+		name       string
+	}{
+		{"./test/valid-config.yml", false, "Valid config file"},
+		{"./test/does-not-exist", true, "Invalid config path"},
+		{"./test/invalid-config-type.yml", true, "Invalid config type for key"},
+		{"./test/invalid-config-missing-alerts.yml", true, "Invalid config missing alerts"},
+	}
+
+	for _, c := range cases {
+		log.Printf("Testing case %s", c.name)
+		_, err := LoadConfig(c.configPath)
+		hasErr := (err != nil)
+		if hasErr != c.expectErr {
+			t.Errorf("LoadConfig(%v), expected=%v actual=%v", c.name, "Err", err)
+			log.Printf("Case failed: %s", c.name)
+		}
+		log.Println("-----")
+	}
+}