A client/server helper wrapper for endpoints in Go.

go/src/infra/libs/jsutil/jsutil_test.go

+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+package jsutil
+
+import (
+        "bytes"
+        "encoding/json"
+        "testing"
+
+        . "github.com/smartystreets/goconvey/convey"
+)
+
+func TestGet(t *testing.T) {
+        t.Parallel()
+
+        const testDoc = `
+        [
+                {
+                        "some": [1337, {"mixed": "values"}],
+                        "wat": "thing"
+                },
+                {}
+        ]
+        `
+
+        var data interface{}
+        dec := json.NewDecoder(bytes.NewBufferString(testDoc))
+        dec.UseNumber()
+        if err := dec.Decode(&data); err != nil {
+                panic(err)
+        }
+
+        Convey("Test Get and GetError", t, func() {
+                Convey("can extract values", func() {
+                        So(len(Get(data, 0).(map[string]interface{})), ShouldEqual, 2)
+                        val, err := Get(data, 0, "some", 0).(json.Number).Int64()
+                        So(err, ShouldBeNil)
+                        So(val, ShouldEqual, 1337)
+                })
+
+                Convey("getting a value that's not there panics", func() {
+                        So(func() {
+                                Get(data, "nope")
+                        }, ShouldPanic)
+                })
+
+                Convey("errors are resonable", func() {
+                        _, err := GetError(data, 0, "some", 1, "mixed", 10)
+                        So(err.Error(), ShouldContainSubstring,
+                                "expected []interface{}, but got string")
+
+                        _, err = GetError(data, 0, "some", 1, "mixed", "nonex")
+                        So(err.Error(), ShouldContainSubstring,
+                                "expected map[string]interface{}, but got string")
+
+                        _, err = GetError(data, 0.1)
+                        So(err.Error(), ShouldContainSubstring,
+                                "expected string or int in pathElems, got float64 instead")
+                })
+        })
+}