1 files changed, 114 insertions, 0 deletions
diff --git a/tests/notmuchfixture.h b/tests/notmuchfixture.h
new file mode 100644
index 0000000..b7287f4
--- /dev/null
+++ b/tests/notmuchfixture.h
@@ -0,0 +1,114 @@
+#pragma once
+
+#include <QDir>
+#include <QFile>
+#include <QProcess>
+#include <QString>
+#include <QTemporaryDir>
+#include <QTextStream>
+
+/// A throwaway notmuch database in a temporary directory.
+///
+/// Builds a Maildir tree, writes a notmuch config pointing at it, and runs
+/// `notmuch new`. Nothing touches the developer's own ~/Mail or
+/// ~/.notmuch-config: the config path is handed to the worker explicitly.
+///
+/// Maildir flags are not decoration. notmuch synchronizes them with tags at
+/// index time, so a file named `...:2,S` ("seen") comes out WITHOUT the unread
+/// tag no matter what [new] tags says. addMessage() takes the unread state and
+/// picks the filename accordingly.
+class NotmuchFixture
+{
+public:
+    /// True when the temporary tree was created. Check before use.
+    bool isValid() const { return m_dir.isValid(); }
+
+    QString configPath() const { return m_dir.filePath(QStringLiteral("config")); }
+    QString maildirPath() const { return m_dir.filePath(QStringLiteral("mail")); }
+
+    /// Writes one message into <folder>/cur (or new/ when unread).
+    ///
+    /// Returns false if the file could not be written. Call index() afterwards.
+    bool addMessage(const QString &folder, const QString &messageId,
+                    const QString &subject, const QString &from,
+                    const QString &date, const QString &body,
+                    bool unread = true, const QString &inReplyTo = QString())
+    {
+        // Unread messages must not carry the maildir "S" flag, so they go to
+        // new/ where no flags exist at all.
+        const QString sub = unread ? QStringLiteral("new") : QStringLiteral("cur");
+        const QString dirPath = maildirPath() + QLatin1Char('/') + folder;
+        QDir dir;
+        if (!dir.mkpath(dirPath + QStringLiteral("/cur"))
+            || !dir.mkpath(dirPath + QStringLiteral("/new"))
+            || !dir.mkpath(dirPath + QStringLiteral("/tmp"))) {
+            return false;
+        }
+
+        // The local part of the id makes a safe, unique, flag-free filename.
+        QString base = messageId;
+        base.remove(QLatin1Char('<')).remove(QLatin1Char('>'));
+        base.replace(QLatin1Char('@'), QLatin1Char('.'));
+        base.replace(QLatin1Char('/'), QLatin1Char('.'));
+        if (!unread)
+            base += QStringLiteral(":2,S");
+
+        QFile file(dirPath + QLatin1Char('/') + sub + QLatin1Char('/') + base);
+        if (!file.open(QIODevice::WriteOnly | QIODevice::Text))
+            return false;
+
+        QTextStream out(&file);
+        out << "From: " << from << "\n"
+            << "To: danix@danix.xyz\n"
+            << "Subject: " << subject << "\n"
+            << "Message-ID: <" << messageId << ">\n"
+            << "Date: " << date << "\n";
+        if (!inReplyTo.isEmpty())
+            out << "In-Reply-To: <" << inReplyTo << ">\n"
+                << "References: <" << inReplyTo << ">\n";
+        out << "\n" << body << "\n";
+        out.flush();
+        file.close();
+        return true;
+    }
+
+    /// Writes the config and runs `notmuch new`. Safe to call repeatedly.
+    /// Returns false (with error() set) if notmuch is missing or fails.
+    bool index()
+    {
+        QFile config(configPath());
+        if (!config.open(QIODevice::WriteOnly | QIODevice::Text)) {
+            m_error = QStringLiteral("cannot write fixture config");
+            return false;
+        }
+        QTextStream out(&config);
+        out << "[database]\n"
+            << "path=" << maildirPath() << "\n"
+            << "[new]\n"
+            << "tags=unread;inbox;\n";
+        out.flush();
+        config.close();
+
+        QProcess proc;
+        QProcessEnvironment env = QProcessEnvironment::systemEnvironment();
+        env.insert(QStringLiteral("NOTMUCH_CONFIG"), configPath());
+        proc.setProcessEnvironment(env);
+        proc.start(QStringLiteral("notmuch"), { QStringLiteral("new") });
+        if (!proc.waitForStarted(5000)) {
+            m_error = QStringLiteral("notmuch not found on PATH");
+            return false;
+        }
+        if (!proc.waitForFinished(30000) || proc.exitCode() != 0) {
+            m_error = QStringLiteral("notmuch new failed: %1")
+                          .arg(QString::fromLocal8Bit(proc.readAllStandardError()));
+            return false;
+        }
+        return true;
+    }
+
+    QString error() const { return m_error; }
+
+private:
+    QTemporaryDir m_dir;
+    QString m_error;
+};