Added datasource prometheus values for json data

.gitignore

@@ -25,3 +25,4 @@ _testmain.go
 
 # vim swap files
 .*.sw?
+.idea

datasource.go

@@ -37,6 +37,9 @@ type JSONData struct {
 	CustomMetricsNamespaces string `json:"customMetricsNamespaces,omitempty"`
 	DefaultRegion           string `json:"defaultRegion,omitempty"`
 	TlsSkipVerify           bool   `json:"tlsSkipVerify,omitempty"`
+	HttpMethod              string `json:"httpMethod,omitempty"`
+	QueryTimeout            string `json:"queryTimeout,omitempty"`
+	TimeInterval            string `json:"timeInterval,omitempty"`
 }
 
 // SecureJSONData is a representation of the datasource `secureJsonData` property

datasource_test.go

@@ -73,3 +73,32 @@ func TestNewDataSource(t *testing.T) {
 		t.Error("datasource creation response should return the created datasource ID")
 	}
 }
+
+func TestNewPrometheusDataSource(t *testing.T) {
+	server, client := gapiTestTools(200, createdDataSourceJSON)
+	defer server.Close()
+
+	ds := &DataSource{
+		Name:      "foo_prometheus",
+		Type:      "prometheus",
+		URL:       "http://some-url.com",
+		Access:    "access",
+		IsDefault: true,
+		JSONData: JSONData{
+			HttpMethod:   "POST",
+			QueryTimeout: "60s",
+			TimeInterval: "1m",
+		},
+	}
+
+	created, err := client.NewDataSource(ds)
+	if err != nil {
+		t.Error(err)
+	}
+
+	t.Log(pretty.PrettyFormat(created))
+
+	if created != 1 {
+		t.Error("datasource creation response should return the created datasource ID")
+	}
+}