166 lines
3.9 KiB
Go
166 lines
3.9 KiB
Go
package router
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import (
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"fmt"
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"io/ioutil"
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"net/http"
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"net/http/httptest"
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"testing"
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)
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func TestAddRouter(t *testing.T) {
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defer testOutcome("can add router", t)
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router := Router{}
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routeCounter := 0
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err := addAndCheckRoute(&router, http.MethodGet, "/", func(http.ResponseWriter, *http.Request) {}, &routeCounter)
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if err != nil {
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t.Error("The route was not correctly added to the router: ", err)
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}
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err = addAndCheckRoute(&router, http.MethodPost, "/", func(http.ResponseWriter, *http.Request) {}, &routeCounter)
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if err != nil {
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t.Error("The route was not correctly added to the router: ", err)
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}
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err = addAndCheckRoute(&router, http.MethodPatch, "/items", func(http.ResponseWriter, *http.Request) {}, &routeCounter)
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if err != nil {
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t.Error("The route was not correctly added to the router: ", err)
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}
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err = addAndCheckRoute(&router, http.MethodDelete, "/items/thing/man/bird/horse/poop", func(http.ResponseWriter, *http.Request) {}, &routeCounter)
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if err != nil {
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t.Error("The route was not correctly added to the router: ", err)
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}
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err = addAndCheckRoute(&router, http.MethodDelete, "/items/thing/man/bird/cat/poop", func(http.ResponseWriter, *http.Request) {}, &routeCounter)
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if err != nil {
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t.Error("The route was not correctly added to the router: ", err)
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}
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}
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func TestServeHTTP(t *testing.T) {
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defer testOutcome("can find correct callback function", t)
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router := Router{}
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path := "/items"
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expectedBody := "I am /items"
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expectedCode := 200
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router.AddRoute(http.MethodGet, path, func(w http.ResponseWriter, r *http.Request) {
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w.WriteHeader(expectedCode)
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w.Write([]byte(expectedBody))
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})
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err := matchAndCheckRoute(&router, http.MethodGet, path, expectedBody, expectedCode)
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if err != nil {
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t.Error("Did not find the expected callback handler", err)
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return
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}
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}
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func matchAndCheckRoute(r *Router, method string, path string, expectedBody string, expectedCode int) (err error) {
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request, err := http.NewRequest(method, path, nil)
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rr := httptest.NewRecorder()
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if err != nil {
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err = fmt.Errorf("Could not create request")
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return
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}
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r.ServeHTTP(rr, request)
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if rr.Code != expectedCode {
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err = fmt.Errorf("The returned callback did not write 200 to the header. Found %d", rr.Code)
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return
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}
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body, _ := ioutil.ReadAll(rr.Body)
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if string(body) != string([]byte(expectedBody)) {
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err = fmt.Errorf(
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"The returned callback did not write the expected body. Expected: %s. Actual: %s",
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expectedBody,
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string(body),
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)
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return
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}
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return
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}
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func addAndCheckRoute(r *Router, method string, path string, callback http.HandlerFunc, routeCounter *int) (err error) {
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err = r.AddRoute(method, path, callback)
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defer func(routeCounter *int) {
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*routeCounter++
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}(routeCounter)
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if err != nil {
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return
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}
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if len(r.routes) != *routeCounter+1 {
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err = fmt.Errorf("Expected there to be %d route(s), but there are %d", *routeCounter+1, len(r.routes))
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return
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}
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route := r.routes[*routeCounter]
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if route.method != method {
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err = fmt.Errorf("Expected the route method to be %s, but it was %s", method, route.method)
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return
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}
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if route.path != path {
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err = fmt.Errorf("Expected the route path to be %s, but it was %s", path, route.path)
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return
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}
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if route.callback == nil {
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err = fmt.Errorf("Expected route to have a callback function, but the callback was nil")
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return
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}
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return
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}
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func testOutcome(message string, t *testing.T) {
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var status string
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if t.Failed() {
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status = "\u001b[31mx\u001b[0m"
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} else {
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status = "\u001b[32m✓\u001b[0m"
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}
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fmt.Printf("%s %s\n", status, message)
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return
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}
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// checkLookup prints out the various saved routes. It's not needed for any test, but is a helpful debugging tool.
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// func checkLookup(curr *segment) {
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// fmt.Printf("%p { path: %s, methods: %v, children: %v}\n", curr, curr.path, curr.methods, curr.children)
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// for _, v := range curr.children {
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// checkLookup(v)
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// }
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// }
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