vlib: add toml module + tests (#11964)

vlib/toml/tests/nested_test.v

@@ -0,0 +1,43 @@
+import toml
+
+const toml_text = '
+[db]
+enabled = true
+
+[servers]
+  # Indentation (tabs and/or spaces) is allowed but not required
+  [servers.alpha]
+  ip = "10.0.0.1"
+  dc = "eqdc10"
+
+  [servers.beta]
+  ip = "10.0.0.2"
+  dc = "eqdc10"
+
+  [servers.alpha.tricky]
+  ip = "10.0.0.100"
+
+[firewall.rules.limit]
+	ip = "10.0.0.101"
+
+	[firewall.rules]
+	block = true
+'
+
+fn test_parse() {
+	toml_doc := toml.parse(toml_text) or { panic(err) }
+	// dump(toml_doc.ast)
+	// assert false
+
+	assert toml_doc.value('db.enabled').bool()
+	// TODO make this work
+	assert toml_doc.value('servers.alpha.ip').string() == '10.0.0.1'
+	assert toml_doc.value('servers.alpha.dc').string() == 'eqdc10'
+
+	assert toml_doc.value('servers.beta.ip').string() == '10.0.0.2'
+	assert toml_doc.value('servers.beta.dc').string() == 'eqdc10'
+
+	assert toml_doc.value('servers.alpha.tricky.ip').string() == '10.0.0.100'
+	assert toml_doc.value('firewall.rules.limit.ip').string() == '10.0.0.101'
+	assert toml_doc.value('firewall.rules.block').bool() == true
+}