client_test: Add tests for NEO URI parser

This test was missing so far. Particularly recent changes of the
NEO URI scheme [1], but also problems with valid old URI [2] stressed
out the necessity for comprehensive NEO URI parser tests.

[1] kirr/neo@4c9414ea
[2] 573514c6 (comment 184417)

go/neo/client_test.go

@@ -673,6 +673,68 @@ func TestWatch(t *testing.T) {
 	})
 }
 
+// TestParseURL ensures that parsing NEO URL works as expected (= following the
+// scheme neo(s)://[credentials@]master1,master2,...,masterN/name?options)
+func TestParseURL(t *testing.T) {
+	o := zodb.DriverOptions{ReadOnly: true}
+	// Most simple valid URI
+	testParseURL(t, "neo://127.0.0.1/test", urlInfo{}, o, o)
+	// With 2 masters
+	testParseURL(t, "neo://127.0.0.1,127.0.0.2/test", urlInfo{masterAddr: "127.0.0.1,127.0.0.2"}, o, o)
+	// With ssl
+	u := "neos://ca=ca;cert=cert;key=key@127.0.0.1/test"
+	testParseURL(t, u, urlInfo{netcfg: neonet.Config{CA: "ca", Cert: "cert", Key: "key"}}, o, o)
+	// With query parameters
+	u = "neo://127.0.0.1/test?read-only=true&compress=true&logfile=n.log&cache-size=256"
+	testParseURL(t, u, urlInfo{}, zodb.DriverOptions{}, o)
+}
+
+// testParseURL tests one zurl for correctness by comparing its parsed
+// data with a user provided urlInfo. It also checks whether parameters
+// are propagated from a URL to DriverOptions.
+//
+// Hint: testParseURL automatically sets default to undefined fields of the
+// user provided urlInfo and also resets all fields to their null
+// value after the test is finished.
+func testParseURL(t *testing.T, zurl string, urlinfoOk urlInfo, opt zodb.DriverOptions, optOk zodb.DriverOptions) {
+	e := func (format string, a ...interface{}) {
+		t.Errorf(zurl + ": " + format, a...)
+	}
+
+	urlinfoOk.setDefault()
+	u, err := url.Parse(zurl)
+	if err != nil {
+		t.Fatal(err)
+	}
+	urlinfo, err := parseURL(context.Background(), u, &opt)
+	if err != nil {
+		t.Fatal(err)
+	}
+	// Test urlInfo
+	if urlinfo.masterAddr != urlinfoOk.masterAddr {
+		e("masterAddr: got %q, want %q", urlinfo.masterAddr, urlinfoOk.masterAddr)
+	}
+	if urlinfo.name != urlinfoOk.name {
+		e("name: got %q, want %q", urlinfo.name, urlinfoOk.name)
+	}
+	if urlinfo.netcfg != urlinfoOk.netcfg {
+		e("netcfg: got %q, want %q", urlinfo.netcfg, urlinfoOk.netcfg)
+	}
+	// Test DriverOptions
+	if opt != optOk {
+		e("opt: got %v, want %v", opt, optOk)
+	}
+}
+
+// setDefault sets default test values for a urlInfo
+func (urlinfo *urlInfo) setDefault() {
+	if urlinfo.masterAddr == "" {
+		urlinfo.masterAddr = "127.0.0.1"
+	}
+	if urlinfo.name == "" {
+		urlinfo.name = "test"
+	}
+}
 
 func neoOpen(zurl string, opt *zodb.DriverOptions) (_ *Client, at0 zodb.Tid, err error) {
 	defer xerr.Contextf(&err, "openneo %s", zurl)