feat(config): support multi-service yaml config

config_test.go

@@ -0,0 +1,118 @@
+package main
+
+import (
+	"testing"
+	"time"
+)
+
+func TestNormalizeConfigGeneratesNamesFromAdapterAndHost(t *testing.T) {
+	services, err := normalizeConfig(appConfig{
+		Services: []serviceFileConfig{
+			{Adapter: "redis", Config: map[string]string{"url": "redis://default@cache.example.com:6379"}},
+			{Adapter: "mongodb", Config: map[string]string{"uri": "mongodb+srv://user:pass@cluster.mongodb.net", "database": "keepalive", "collection": "counter"}},
+			{Adapter: "couchbase", Config: map[string]string{"connection_string": "couchbases://cb.example.net", "username": "u", "password": "p", "bucket_name": "b", "scope_name": "_default", "collection_name": "_default"}},
+		},
+	})
+	if err != nil {
+		t.Fatalf("normalizeConfig returned error: %v", err)
+	}
+
+	want := []string{"redis-cache-example-com", "mongodb-cluster-mongodb-net", "couchbase-cb-example-net"}
+	for i, service := range services {
+		if service.Name != want[i] {
+			t.Fatalf("services[%d].Name = %q, want %q", i, service.Name, want[i])
+		}
+	}
+}
+
+func TestKeepaliveExampleConfigParses(t *testing.T) {
+	services, err := loadConfigFile("keepalive.example.yaml")
+	if err != nil {
+		t.Fatalf("loadConfigFile returned error: %v", err)
+	}
+	if len(services) != 4 {
+		t.Fatalf("len(services) = %d, want 4", len(services))
+	}
+}
+
+func TestNormalizeConfigSuffixesDuplicateGeneratedNames(t *testing.T) {
+	services, err := normalizeConfig(appConfig{
+		Services: []serviceFileConfig{
+			{Adapter: "redis", Config: map[string]string{"url": "redis://cache.example.com:6379"}},
+			{Adapter: "redis", Config: map[string]string{"url": "redis://cache.example.com:6379"}},
+		},
+	})
+	if err != nil {
+		t.Fatalf("normalizeConfig returned error: %v", err)
+	}
+
+	if services[0].Name != "redis-cache-example-com" {
+		t.Fatalf("services[0].Name = %q", services[0].Name)
+	}
+	if services[1].Name != "redis-cache-example-com-2" {
+		t.Fatalf("services[1].Name = %q", services[1].Name)
+	}
+}
+
+func TestNormalizeConfigRejectsDuplicateExplicitNames(t *testing.T) {
+	_, err := normalizeConfig(appConfig{
+		Services: []serviceFileConfig{
+			{Name: "cache", Adapter: "redis", Config: map[string]string{"url": "redis://one.example.com:6379"}},
+			{Name: "cache", Adapter: "redis", Config: map[string]string{"url": "redis://two.example.com:6379"}},
+		},
+	})
+	if err == nil {
+		t.Fatal("normalizeConfig returned nil error")
+	}
+}
+
+func TestNormalizeConfigRejectsExplicitNameThatDuplicatesGeneratedName(t *testing.T) {
+	_, err := normalizeConfig(appConfig{
+		Services: []serviceFileConfig{
+			{Adapter: "redis", Config: map[string]string{"url": "redis://cache.example.com:6379"}},
+			{Name: "redis-cache-example-com", Adapter: "redis", Config: map[string]string{"url": "redis://other.example.com:6379"}},
+		},
+	})
+	if err == nil {
+		t.Fatal("normalizeConfig returned nil error")
+	}
+}
+
+func TestNormalizeConfigAppliesGlobalAndServiceDefaults(t *testing.T) {
+	services, err := normalizeConfig(appConfig{
+		Interval:   "2m",
+		CounterKey: "global-counter",
+		Services: []serviceFileConfig{
+			{Adapter: "redis", Config: map[string]string{"url": "redis://cache.example.com:6379"}},
+			{Adapter: "redis", Interval: "30s", CounterKey: "local-counter", Config: map[string]string{"url": "redis://other.example.com:6379"}},
+		},
+	})
+	if err != nil {
+		t.Fatalf("normalizeConfig returned error: %v", err)
+	}
+
+	if services[0].Interval != 2*time.Minute {
+		t.Fatalf("services[0].Interval = %s, want 2m", services[0].Interval)
+	}
+	if services[0].Config["counter_key"] != "global-counter" {
+		t.Fatalf("services[0] counter_key = %q", services[0].Config["counter_key"])
+	}
+	if services[1].Interval != 30*time.Second {
+		t.Fatalf("services[1].Interval = %s, want 30s", services[1].Interval)
+	}
+	if services[1].Config["counter_key"] != "local-counter" {
+		t.Fatalf("services[1] counter_key = %q", services[1].Config["counter_key"])
+	}
+}
+
+func TestNormalizeConfigRejectsNonPositiveInterval(t *testing.T) {
+	_, err := normalizeConfig(appConfig{
+		Interval: "0s",
+		Services: []serviceFileConfig{
+			{Adapter: "redis", Config: map[string]string{"url": "redis://cache.example.com:6379"}},
+		},
+	})
+	if err == nil {
+		t.Fatal("normalizeConfig returned nil error")
+	}
+}