1 files changed, 52 insertions, 0 deletions
diff --git a/internal/config/config_test.go b/internal/config/config_test.go
new file mode 100644
index 0000000..da073c4
--- /dev/null
+++ b/internal/config/config_test.go
@@ -0,0 +1,52 @@
+package config
+
+import (
+	"testing"
+	"time"
+)
+
+func TestNewConfig(t *testing.T) {
+	cfg := NewConfig()
+
+	if cfg.Mode != ModeRealtime {
+		t.Errorf("Default mode = %v, want %v", cfg.Mode, ModeRealtime)
+	}
+	if cfg.PushgatewayURL != "http://localhost:9091" {
+		t.Errorf("Default PushgatewayURL = %v, want http://localhost:9091", cfg.PushgatewayURL)
+	}
+	if cfg.PrometheusURL != "http://localhost:9090/api/v1/write" {
+		t.Errorf("Default PrometheusURL = %v, want http://localhost:9090/api/v1/write", cfg.PrometheusURL)
+	}
+	if cfg.JobName != "example_metrics_pusher" {
+		t.Errorf("Default JobName = %v, want example_metrics_pusher", cfg.JobName)
+	}
+	if cfg.InputFormat != "csv" {
+		t.Errorf("Default InputFormat = %v, want csv", cfg.InputFormat)
+	}
+	if cfg.HoursAgo != 24 {
+		t.Errorf("Default HoursAgo = %v, want 24", cfg.HoursAgo)
+	}
+	if cfg.Interval != 1 {
+		t.Errorf("Default Interval = %v, want 1", cfg.Interval)
+	}
+}
+
+func TestModeConstants(t *testing.T) {
+	modes := []Mode{ModeRealtime, ModeHistoric, ModeBackfill, ModeAuto}
+	expected := []string{"realtime", "historic", "backfill", "auto"}
+
+	for i, mode := range modes {
+		if string(mode) != expected[i] {
+			t.Errorf("Mode constant %d = %v, want %v", i, mode, expected[i])
+		}
+	}
+}
+
+func TestConstants(t *testing.T) {
+	if AutoIngestThreshold != 5*time.Minute {
+		t.Errorf("AutoIngestThreshold = %v, want 5m", AutoIngestThreshold)
+	}
+	if DefaultHTTPTimeout != 10*time.Second {
+		t.Errorf("DefaultHTTPTimeout = %v, want 10s", DefaultHTTPTimeout)
+	}
+}