http://hugo.gandalfalex.de/tags/pprof/ Recent content in Pprof on Notes Hugo en-us Sun, 04 Oct 2026 00:00:00 +0000 http://hugo.gandalfalex.de/notes/golang/testing/ Sun, 04 Oct 2026 00:00:00 +0000 http://hugo.gandalfalex.de/notes/golang/testing/ <p>No framework required: tests are plain functions in <code>_test.go</code> files next to the code, run by <code>go test</code>.</p> <h2 id="the-building-blocks">The building blocks</h2> <table> <thead> <tr> <th>Need</th> <th>Go</th> </tr> </thead> <tbody> <tr> <td>A test</td> <td><code>func TestSave(t *testing.T)</code> in <code>store_test.go</code></td> </tr> <tr> <td>Assertions</td> <td><code>if got != want { t.Errorf(...) }</code> (or testify, if you like)</td> </tr> <tr> <td>Parameterized tests</td> <td>Table-driven test + <code>t.Run</code> subtests</td> </tr> <tr> <td>Test doubles</td> <td>Hand-written fake of a small, consumer-side interface</td> </tr> <tr> <td>HTTP servers/clients in tests</td> <td><code>net/http/httptest</code></td> </tr> <tr> <td>Per-test setup / teardown</td> <td>Helper function + <code>t.Cleanup</code></td> </tr> <tr> <td>Per-package setup / teardown</td> <td><code>TestMain(m *testing.M)</code></td> </tr> <tr> <td>Temp files, env vars</td> <td><code>t.TempDir()</code>, <code>t.Setenv()</code></td> </tr> <tr> <td>Separating slow suites</td> <td>Build tags (<code>//go:build integration</code>)</td> </tr> <tr> <td>Real dependencies in Docker</td> <td><code>testcontainers-go</code></td> </tr> <tr> <td>Browser tests</td> <td><code>playwright-go</code></td> </tr> <tr> <td>Coverage, parallelism</td> <td><code>go test -cover</code>, <code>t.Parallel()</code></td> </tr> </tbody> </table> <p>Package choice: <code>package foo</code> tests internals; <code>package foo_test</code> (black-box) only sees the exported API.</p>