add GetQueryMap and unittest

context.go

@@ -363,16 +363,25 @@ func (c *Context) GetQueryArray(key string) ([]string, bool) {
 
 // QueryMap returns a map for a given query key.
 func (c *Context) QueryMap(key string) map[string]string {
+	dicts, _ := c.GetQueryMap(key)
+	return dicts
+}
+
+// GetQueryMap returns a map for a given query key, plus a boolean value
+// whether at least one value exists for the given key.
+func (c *Context) GetQueryMap(key string) (map[string]string, bool) {
 	params := c.Request.URL.Query()
 	dicts := make(map[string]string)
+	exist := false
 	for k, v := range params {
 		if i := strings.IndexByte(k, '['); i >= 1 && k[0:i] == key {
 			if j := strings.IndexByte(k[i+1:], ']'); j >= 1 {
+				exist = true
 				dicts[k[i+1:][:j]] = v[0]
 			}
 		}
 	}
-	return dicts
+	return dicts, exist
 }
 
 // PostForm returns the specified key from a POST urlencoded form or multipart form

context_test.go

@@ -371,7 +371,8 @@ func TestContextQuery(t *testing.T) {
 func TestContextQueryAndPostForm(t *testing.T) {
 	c, _ := CreateTestContext(httptest.NewRecorder())
 	body := bytes.NewBufferString("foo=bar&page=11&both=&foo=second")
-	c.Request, _ = http.NewRequest("POST", "/?both=GET&id=main&id=omit&array[]=first&array[]=second", body)
+	c.Request, _ = http.NewRequest("POST",
+		"/?both=GET&id=main&id=omit&array[]=first&array[]=second&ids[a]=hi&ids[b]=3.14", body)
 	c.Request.Header.Add("Content-Type", MIMEPOSTForm)
 
 	assert.Equal(t, "bar", c.DefaultPostForm("foo", "none"))
@@ -439,6 +440,30 @@ func TestContextQueryAndPostForm(t *testing.T) {
 	values = c.QueryArray("both")
 	assert.Equal(t, 1, len(values))
 	assert.Equal(t, "GET", values[0])
+
+	dicts, ok := c.GetQueryMap("ids")
+	assert.True(t, ok)
+	assert.Equal(t, "hi", dicts["a"])
+	assert.Equal(t, "3.14", dicts["b"])
+
+	dicts, ok = c.GetQueryMap("nokey")
+	assert.False(t, ok)
+	assert.Equal(t, 0, len(dicts))
+
+	dicts, ok = c.GetQueryMap("both")
+	assert.False(t, ok)
+	assert.Equal(t, 0, len(dicts))
+
+	dicts, ok = c.GetQueryMap("array")
+	assert.False(t, ok)
+	assert.Equal(t, 0, len(dicts))
+
+	dicts = c.QueryMap("ids")
+	assert.Equal(t, "hi", dicts["a"])
+	assert.Equal(t, "3.14", dicts["b"])
+
+	dicts = c.QueryMap("nokey")
+	assert.Equal(t, 0, len(dicts))
 }
 
 func TestContextPostFormMultipart(t *testing.T) {