Fix flaky metrics test

metrics/prometheus_test.go

@@ -17,23 +17,37 @@ func TestPrometheus(t *testing.T) {
 	m.Gauge("tests").Set(123)
 	m.Counter("test_total").Add(3)
 
-	expected := `
+	actual := m.Prometheus()
+
+	assert.Contains(t, actual,
+		`
 # HELP anycable_go_test_total Total number of smth
 # TYPE anycable_go_test_total counter
 anycable_go_test_total 3
+`,
+	)
 
+	assert.Contains(t, actual,
+		`
 # HELP anycable_go_any_total Total number of anything
 # TYPE anycable_go_any_total counter
 anycable_go_any_total 0
+`,
+	)
 
+	assert.Contains(t, actual,
+		`
 # HELP anycable_go_tests Number of active smth
 # TYPE anycable_go_tests gauge
 anycable_go_tests 123
+`,
+	)
 
+	assert.Contains(t, actual,
+		`
 # HELP anycable_go_any_tests Number of active anything
 # TYPE anycable_go_any_tests gauge
 anycable_go_any_tests 0
-`
-
-	assert.Equal(t, expected, m.Prometheus())
+`,
+	)
 }