impl with.CachedHTTP

http_test.go

@@ -0,0 +1,119 @@
+package with_test
+
+import (
+	"context"
+	"io"
+	"net/http"
+	"net/http/httptest"
+	"slices"
+	"strings"
+	"testing"
+
+	"gitea.bel.blue/bel/with"
+)
+
+func TestCachedHTTP(t *testing.T) {
+	called := false
+	code := http.StatusAccepted
+	headers := http.Header{
+		"K":  []string{"v"},
+		"K2": []string{"v2a", "v2b"},
+	}
+	body := "response body"
+	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		called = true
+		for k, v := range headers {
+			for _, subv := range v {
+				w.Header().Add(k, subv)
+			}
+		}
+		w.WriteHeader(code)
+		w.Write([]byte(body))
+	}))
+	defer server.Close()
+
+	testResp := func(resp *http.Response) {
+		if resp.StatusCode != code {
+			t.Errorf("initial request wrong status code: %d", resp.StatusCode)
+		} else if !slices.Equal(resp.Header["K"], headers["K"]) {
+			t.Errorf("initial request wrong headers[k]: %+v in %+v", resp.Header["K"], resp.Header)
+		} else if !slices.Equal(resp.Header["K2"], headers["K2"]) {
+			t.Errorf("initial request wrong headers[k2]: %+v in %+v", resp.Header["K2"], resp.Header)
+		} else if b, _ := io.ReadAll(resp.Body); string(b) != body {
+			t.Errorf("initial request wrong resp body: %q", b)
+		}
+	}
+
+	if err := with.CachedHTTP(context.Background(), func(c *http.Client) error {
+		req := func() *http.Request {
+			req, _ := http.NewRequest(http.MethodGet, server.URL+"/my/path", strings.NewReader("my body"))
+			return req
+		}
+
+		if resp, err := c.Do(req()); err != nil {
+			t.Fatalf("failed initial request: %v", err)
+		} else if !called {
+			t.Errorf("initial request didnt hit server")
+		} else {
+			testResp(resp)
+		}
+
+		called = false
+		if resp, err := c.Do(req()); err != nil {
+			t.Fatalf("failed second request: %v", err)
+		} else if called {
+			t.Errorf("second request didnt hit cache")
+		} else {
+			testResp(resp)
+		}
+
+		called = false
+		reqDiffURLPath := req()
+		reqDiffURLPath.URL.Path += "/teehee"
+		if resp, err := c.Do(reqDiffURLPath); err != nil {
+			t.Fatalf("failed diff url path request: %v", err)
+		} else if !called {
+			t.Errorf("new initial hit cache")
+		} else {
+			testResp(resp)
+		}
+
+		called = false
+		reqDiffURLQuery := req()
+		reqDiffURLQuery.URL.RawQuery += "hello=world"
+		if resp, err := c.Do(reqDiffURLQuery); err != nil {
+			t.Fatalf("failed diff url query request: %v", err)
+		} else if !called {
+			t.Errorf("new initial hit cache")
+		} else {
+			testResp(resp)
+		}
+
+		called = false
+		reqDiffHeader := req()
+		reqDiffHeader.Header.Set("Misc", "Misc")
+		if resp, err := c.Do(reqDiffHeader); err != nil {
+			t.Fatalf("failed diff header request: %v", err)
+		} else if !called {
+			t.Errorf("new initial hit cache")
+		} else {
+			testResp(resp)
+		}
+
+		called = false
+		reqDiffBody := req()
+		reqDiffBody.Body = io.NopCloser(strings.NewReader("diff"))
+		reqDiffBody.ContentLength = int64(len("diff"))
+		if resp, err := c.Do(reqDiffBody); err != nil {
+			t.Fatalf("failed diff body request: %v", err)
+		} else if !called {
+			t.Errorf("new initial hit cache")
+		} else {
+			testResp(resp)
+		}
+
+		return nil
+	}); err != nil {
+		t.Fatal(err)
+	}
+}