Add basic unittests for the config related functionality

config/parser.go

@@ -3,7 +3,6 @@ package config
 import (
 	"encoding/json"
 	"io/ioutil"
-	"os"
 	"path/filepath"
 	"sync"
 
@@ -14,21 +13,6 @@ import (
 // ReadConfig reads the configuration from the path
 func ReadConfig(path string) (*Config, error) {
 	b, err := ioutil.ReadFile(path)
-
-	if os.IsNotExist(err) {
-		c := &Config{}
-
-		if err = c.Default(); err != nil {
-			return nil, errors.Wrap(err, "defaulting")
-		}
-
-		if err = c.Validate(); err != nil {
-			return nil, errors.Wrap(err, "validating")
-		}
-
-		return c, nil
-	}
-
 	if err != nil {
 		return nil, errors.Wrap(err, "reading file")
 	}
@@ -43,9 +27,9 @@ func ReadConfig(path string) (*Config, error) {
 
 // ParseConfig returns config from JSON bytes.
 func ParseConfig(b []byte) (*Config, error) {
-	c := &Config{}
+	var c Config
 
-	if err := json.Unmarshal(b, c); err != nil {
+	if err := json.Unmarshal(b, &c); err != nil {
 		return nil, errors.Wrap(err, "parsing json")
 	}
 
@@ -57,7 +41,7 @@ func ParseConfig(b []byte) (*Config, error) {
 		return nil, errors.Wrap(err, "validating")
 	}
 
-	return c, nil
+	return &c, nil
 }
 
 // Config for the OONI Probe installation

config/parser_test.go

@@ -0,0 +1,19 @@
+package config
+
+import (
+	"testing"
+)
+
+func TestParseConfig(t *testing.T) {
+	config, err := ReadConfig("testdata/valid-config.json")
+	if err != nil {
+		t.Error(err)
+	}
+
+	if len(config.NettestGroups.Middlebox.EnabledTests) < 0 {
+		t.Error("at least one middlebox test should be enabled")
+	}
+	if config.Advanced.IncludeCountry == false {
+		t.Error("country should be included")
+	}
+}

config/testdata/valid-config.json

@@ -0,0 +1,63 @@
+{
+  "_": "This is your OONI Probe config file. See https://ooni.io/help/probe-cli for help",
+  "_version": 0,
+  "_informed_consent": false,
+  "auto_update": true,
+  "sharing": {
+    "include_ip": false,
+    "include_asn": true,
+    "include_gps": true,
+    "upload_results": true,
+    "send_crash_reports": true
+  },
+  "notifications": {
+    "enabled": true,
+    "notify_on_test_completion": true,
+    "notify_on_news": false
+  },
+  "automated_testing": {
+    "enabled": false,
+    "enabled_tests": [
+      "web-connectivity",
+      "facebook-messenger",
+      "whatsapp",
+      "telegram",
+      "dash",
+      "ndt",
+      "http-invalid-request-line",
+      "http-header-field-manipulation"
+    ],
+    "monthly_allowance": "300MB"
+  },
+  "test_settings": {
+    "websites": {
+      "enabled_categories": []
+    },
+    "instant_messaging": {
+      "enabled_tests": [
+        "facebook-messenger",
+        "whatsapp",
+        "telegram"
+      ]
+    },
+    "performance": {
+      "enabled_tests": [
+        "ndt"
+      ],
+      "ndt_server": "auto",
+      "ndt_server_port": "auto",
+      "dash_server": "auto",
+      "dash_server_port": "auto"
+    },
+    "middlebox": {
+      "enabled_tests": [
+        "http-invalid-request-line",
+        "http-header-field-manipulation"
+      ]
+    }
+  },
+  "advanced": {
+    "include_country": true,
+    "use_domain_fronting": false
+  }
+}