Hackaton: Add more unit tests, take 3 (#101525)

* serviceaccounts/secretscan: test Service more thoroughly

* middleware/cookies: add tests for CookieOptions

* anonymous/anonimpl: cover a couple more methods

* components/imguploader: Implement WebDAV integration tests

* components/apikeygen: also check IsValid method

* bus: cover invalid callback signature cases

* cloudmigration/objectstorage: add basic unit tests

* login/social/connectors: add test case for GitHub OAuth fetch emails+orgs

* expr/classic: cover more evaluator types in tests

pkg/middleware/cookies/cookies_test.go

@@ -0,0 +1,37 @@
+package cookies
+
+import (
+	"net/http"
+	"net/http/httptest"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestCookieOptions(t *testing.T) {
+	rr := httptest.NewRecorder()
+
+	expectedName := "cookie-name"
+	expectedValue := "cookie-value"
+
+	WriteCookie(rr, expectedName, expectedValue, 100, nil)
+
+	cookie, err := http.ParseSetCookie(rr.Header().Get("Set-Cookie"))
+	require.NoError(t, err)
+	require.NotNil(t, cookie)
+
+	require.Equal(t, expectedName, cookie.Name)
+	require.Equal(t, expectedValue, cookie.Value)
+	require.GreaterOrEqual(t, cookie.MaxAge, 0)
+
+	// Does not override but appends to the `Set-Cookie` header.
+	DeleteCookie(rr, expectedName, nil)
+
+	cookieHeader := rr.Header().Values("Set-Cookie")
+	require.Len(t, cookieHeader, 2)
+
+	cookie, err = http.ParseSetCookie(cookieHeader[1])
+	require.NoError(t, err)
+	require.NotNil(t, cookie)
+	require.NoError(t, cookie.Valid())
+}