Ticket #4 Allow arabic / chinese script characters

Regular expression to check for language and mark characters in address text. Test

pkg/provider/query.go

@@ -12,7 +12,7 @@ import (
 	"github.com/sirupsen/logrus"
 )
 
-var queryRegexp = regexp.MustCompile("\\w+")
+var queryRegexp = regexp.MustCompile("[\\d\\p{L}\\p{M}\\-]+")
 
 type Query struct {
 	Address  string

pkg/provider/query_test.go

@@ -0,0 +1,55 @@
+package provider
+
+import "testing"
+
+func TestIsValidQuery(t *testing.T) {
+	testCases := []struct {
+		Address       string
+		Lat           float64
+		Lng           float64
+		Query         map[string]string
+		ShouldBeValid bool
+	}{
+		// Valid - place_id is not empty
+		{"", 0, 0, map[string]string{"place_id": "foo"}, true},
+		// Invalid - address, coordinates and place_id are empty
+		{"", 0, 0, map[string]string{"place_id": ""}, false},
+		{"", 0, 0, map[string]string{}, false},
+		// Valid - coordinates present and in correct range
+		{"", 42, 42, map[string]string{}, true},
+		// Invalid - coordinate value out of range
+		{"", 91, 0, map[string]string{}, false},
+		{"", -91, 0, map[string]string{}, false},
+		{"", 0, 181, map[string]string{}, false},
+		{"", 0, -181, map[string]string{}, false},
+		// Valid - address is not empty. Unicode is supported
+		{"foo-bar (baz)", 0, 0, map[string]string{}, true},
+		{"روات", 0, 0, map[string]string{}, true},
+		{"北京", 0, 0, map[string]string{}, true},
+		{"İstanbul", 0, 0, map[string]string{}, true},
+		// Invalid - does not contain language or mark characters
+		{"___", 0, 0, map[string]string{}, false},
+		{"   ", 0, 0, map[string]string{}, false},
+		{"()", 0, 0, map[string]string{}, false},
+	}
+
+	for i, tc := range testCases {
+		q := Query{
+			Address: tc.Address,
+			Lat:     tc.Lat,
+			Lng:     tc.Lng,
+			Query:   tc.Query,
+		}
+
+		var expectedValidity string
+		if tc.ShouldBeValid {
+			expectedValidity = "valid"
+		} else {
+			expectedValidity = "invalid"
+		}
+
+		if q.IsValid() != tc.ShouldBeValid {
+			t.Errorf("%d: %#v is expected to be %s but it is not", i, q, expectedValidity)
+		}
+	}
+}