Create/update unit tests

cmd/cache/cache_test.go

@@ -0,0 +1,68 @@
+package main
+
+import (
+	"encoding/json"
+	"strconv"
+	"testing"
+	"time"
+
+	"github.com/ebosas/microservices/internal/models"
+
+	"github.com/alicebob/miniredis/v2"
+	"github.com/go-redis/redis/v8"
+	"github.com/streadway/amqp"
+)
+
+// TestUpdateRedis tests a message insertion into cache
+func TestUpdateRedis(t *testing.T) {
+	s, err := miniredis.Run()
+	if err != nil {
+		t.Fatalf("miniredis connection: %s", err)
+	}
+	defer s.Close()
+
+	c := redis.NewClient(&redis.Options{Addr: s.Addr()})
+
+	now := time.Now().UnixMilli()
+	var tests = []struct {
+		message string
+		source  string
+		time    int64
+	}{
+		{"Hello", "back", now},
+		{"Another test!", "back", now},
+		{"1", "front", now},
+		{" ", "back", now - 60*60*1000},
+	}
+	for _, test := range tests {
+		d := testArguments(t, test.message, test.source, test.time)
+		updateRedis(*d, c)
+	}
+
+	if got, err := s.Get("total"); err != nil || got != strconv.Itoa(len(tests)) {
+		t.Error("'total' has the wrong value")
+	}
+
+	list, err := s.List("messages")
+	if err != nil {
+		t.Errorf("list 'messages': %s", err)
+	}
+
+	if len(list) != len(tests) {
+		t.Error("'messages' has wrong length")
+	}
+
+	// TODO: compare each message
+}
+
+// testArguments produces arguments for the function being tested
+func testArguments(t *testing.T, message, source string, time int64) *amqp.Delivery {
+	inputMsg := models.Message{Text: message, Source: source, Time: time}
+	messageJson, err := json.Marshal(inputMsg)
+	if err != nil {
+		t.Fatalf("marshal message: %s", err)
+	}
+	d := &amqp.Delivery{Body: messageJson}
+
+	return d
+}