added unit tests for settings validation

pkg/model/settings_test.go

@@ -0,0 +1,35 @@
+package model
+
+import (
+	"testing"
+)
+
+func Test_SettingsValidate(t *testing.T) {
+	settings := Settings{}
+	settings.GitHubApiUrl = "https://github.com/url/with/slash/"
+	if err := settings.Validate(); err != ErrInvalidGitHubTrailingSlash {
+		t.Errorf("Expecting ErrInvalidGitHubTrailingSlash")
+	}
+
+	settings = Settings{}
+	settings.SmtpServer = "127.1.1.1"
+	if err := settings.Validate(); err != ErrInvalidSmtpPort {
+		t.Errorf("Expecting ErrInvalidSmtpPort")
+	}
+
+	settings = Settings{}
+	settings.SmtpServer = "127.1.1.1"
+	settings.SmtpPort = "553"
+	if err := settings.Validate(); err != ErrInvalidSmtpAddress {
+		t.Errorf("Expecting ErrInvalidSmtpAddress")
+	}
+
+	settings = Settings{}
+	settings.SmtpServer = "127.1.1.1"
+	settings.SmtpPort = "553"
+	settings.SmtpAddress = "test@localhost"
+	settings.GitHubApiUrl = "https://api.github.com"
+	if err := settings.Validate(); err != nil {
+		t.Errorf("Expecting successful Settings validation, got %s", err)
+	}
+}