add some tests

internal/config_test.go

@@ -0,0 +1,74 @@
+package internal
+
+import (
+	"testing"
+	"time"
+)
+
+func TestConfig_Validate(t *testing.T) {
+	type fields struct {
+		DnsRecordsToCheck   []string
+		PublicIpResolverTag string
+		ApiToken            string
+		CloudflareZone      string
+		OnChangeComment     string
+		CheckInterval       time.Duration
+	}
+	tests := []struct {
+		name    string
+		fields  fields
+		wantErr bool
+	}{
+		{
+			name: "all ok",
+			fields: fields{
+				DnsRecordsToCheck: []string{"domain1", "domain2"},
+				ApiToken:          "some_api_key",
+				CloudflareZone:    "some_zone",
+			},
+			wantErr: false,
+		},
+		{
+			name: "empty api token",
+			fields: fields{
+				DnsRecordsToCheck: []string{"domain1", "domain2"},
+				ApiToken:          "",
+				CloudflareZone:    "some_zone",
+			},
+			wantErr: true,
+		},
+		{
+			name: "empty check dns record",
+			fields: fields{
+				DnsRecordsToCheck: []string{},
+				ApiToken:          "",
+				CloudflareZone:    "some_zone",
+			},
+			wantErr: true,
+		},
+		{
+			name: "empty zone",
+			fields: fields{
+				DnsRecordsToCheck: []string{"domain1", "domain2"},
+				ApiToken:          "some_api_key",
+				CloudflareZone:    "",
+			},
+			wantErr: true,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			c := Config{
+				DnsRecordsToCheck:   tt.fields.DnsRecordsToCheck,
+				PublicIpResolverTag: tt.fields.PublicIpResolverTag,
+				ApiToken:            tt.fields.ApiToken,
+				CloudflareZone:      tt.fields.CloudflareZone,
+				OnChangeComment:     tt.fields.OnChangeComment,
+				CheckInterval:       tt.fields.CheckInterval,
+			}
+			if err := c.Validate(); (err != nil) != tt.wantErr {
+				t.Errorf("Validate() error = %v, wantErr %v", err, tt.wantErr)
+			}
+		})
+	}
+}