API testing tools for Golang

Contents

• Installation
• apitest package — HTTP handler testing
• assertjson package — JSON assertions
• assertxml package — XML assertions
• Examples — подробные примеры по темам

Installation

go get github.com/muonsoft/api-testing

---

apitest package

The apitest package provides methods for testing client-server communication. It can be used to test http.Handler and build assertions on HTTP responses (status, headers, body).

Example

package yours

import (
    "net/http"
    "testing"
    "github.com/muonsoft/api-testing/apitest"
    "github.com/muonsoft/api-testing/assertjson"
)

func TestYourAPI(t *testing.T) {
    handler := http.HandlerFunc(func(writer http.ResponseWriter, request *http.Request) {
        writer.WriteHeader(http.StatusOK)
        writer.Header().Set("Content-Type", "application/json")
        writer.Write([]byte(`{"ok":true}`))
    })
    
    // HandleGET builds and sends GET request to handler
    response := apitest.HandleGET(t, handler, "/example")
    
    response.IsOK()
    response.HasContentType("application/json")
    response.HasJSON(func(json *assertjson.AssertJSON) {
        json.Node("ok").IsTrue()
    })
    response.Print() // prints response with headers and body
    response.PrintJSON() // prints response with headers and indented JSON body
}

---

assertjson package

The assertjson package provides fluent assertions for JSON values. Nodes are selected via JSON Pointer or path elements. Supports strings, numbers, arrays, objects, UUID, email, URL, time, and JWT.

Example

package yours

import (
    "net/http/httptest"
    "testing"

    "github.com/muonsoft/api-testing/assertjson"
)

func TestYourAPI(t *testing.T) {
    recorder := httptest.NewRecorder()
    handler := newHTTPHandler()

    request := httptest.NewRequest("GET", "/content", nil)
    handler.ServeHTTP(recorder, request)

    assertjson.Has(t, recorder.Body.Bytes(), func(json *assertjson.AssertJSON) {
        json.Node("nullNode").Exists()
        json.Node("notExistingNode").DoesNotExist()
        json.Node("stringNode").IsString().EqualTo("stringValue")
        json.Node("integerNode").IsInteger().EqualTo(123)
        json.Node("objectNode").EqualJSON(`{"objectKey": "objectValue"}`)
        json.Node("bookstore", "books", 1, "name").IsString().EqualTo("Green book")
        json.Node("bookstore", "books", 1).Print() // debug helper
    })
}

JSON Lines (NDJSON): use LinesHas or Lines(t, data).Has(...) to assert over multiple JSON objects, one per line:

assertjson.LinesHas(t, body, func(lines *assertjson.AssertJSONLines) {
    lines.At(0).Node("id").EqualToTheInteger(1)
    lines.At(0).Node("name").EqualToTheString("Alice")
    lines.At(1).Node("role").EqualToTheString("admin")
    lines.WithLength(2)
})

Подробные примеры по темам (строки, числа, массивы, объекты, UUID, время, JWT и др.) — в EXAMPLES.md. Полный API — pkg.go.dev/github.com/muonsoft/api-testing/assertjson.

---

assertxml package

The assertxml package provides methods for testing XML values. Nodes are selected via XML Path syntax.

Example

package yours

import (
    "net/http"
    "net/http/httptest"
    "testing"

    "github.com/muonsoft/api-testing/assertxml"
)

func TestYourAPI(t *testing.T) {
    recorder := httptest.NewRecorder()
    handler := createHTTPHandler()

    request, _ := http.NewRequest("GET", "/content", nil)
    handler.ServeHTTP(recorder, request)

    assertxml.Has(t, recorder.Body.Bytes(), func(xml *assertxml.AssertXML) {
        // common assertions
        xml.Node("/root/stringNode").Exists()
        xml.Node("/root/notExistingNode").DoesNotExist()
  
        // string assertions
        xml.Node("/root/stringNode").EqualToTheString("stringValue")
    })
}