loadavg: Split the collector for linux and other platforms.

collector/loadavg_linux_test.go

@@ -0,0 +1,14 @@
+package collector
+
+import "testing"
+
+func TestLoad(t *testing.T) {
+	load, err := parseLoad("0.21 0.37 0.39 1/719 19737")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if want := 0.21; want != load {
+		t.Fatalf("want load %f, got %f", want, load)
+	}
+}