#
#   Note: if you interrupt a bazel command on docker (ctrl-c), you
#   will need to run `docker exec tf pkill bazel` to quit bazel.
#
#   Note: new files created from the container are owned by "root".
#   You can run e.g. `docker exec tf chown -R $(id -u):$(id -g) build_output`
#   to transfer ownership to your user.
#
# Docker is enabled by default on Linux. You may disable it if you prefer:

    }

    @Test
    public void test_toStringMethodWithCause() {
        // Test toString method behavior with cause
        String message = "Plugin error with cause";
        Throwable cause = new RuntimeException("Root cause");
        PluginException exception = new PluginException(message, cause);

        String toStringResult = exception.toString();
        assertNotNull(toStringResult);

你會看到子應用程式的自動 API 文件，只包含它自己的*路徑操作*，而且都在正確的子路徑前綴 `/subapi` 之下：

<img src="/img/tutorial/sub-applications/image02.png">

如果你嘗試在任一介面中互動，它們都會正常運作，因為瀏覽器能與各自的應用程式或子應用程式通訊。

### 技術細節：`root_path` { #technical-details-root-path }

當你像上面那樣掛載子應用程式時，FastAPI 會使用 ASGI 規範中的一個機制 `root_path`，將子應用程式的掛載路徑告知它。

如此一來，子應用程式就會知道在文件 UI 使用該路徑前綴。

而且子應用程式也能再掛載自己的子應用程式，一切都能正確運作，因為 FastAPI 會自動處理所有這些 `root_path`。

index $obj .Key | b64dec -}} {{- else -}} {{- randAlphaNum $len -}} {{- end -}} {{- end }} {{- define "minio.root.username" -}} {{- if .Values.rootUser }} {{- .Values.rootUser | toString }} {{- else }} {{- include "minio.getValueFromSecret" (dict "Namespace" .Release.Namespace "Name" (include "minio.fullname" .) "Length" 20 "Key" "rootUser") }} {{- end }} {{- end -}} {{- define "minio.root.password" -}} {{- if .Values.rootPassword }} {{- .Values.rootPassword | toString }} {{- else }} {{- include ...

index $obj .Key | b64dec -}} {{- else -}} {{- randAlphaNum $len -}} {{- end -}} {{- end }} {{- define "minio.root.username" -}} {{- if .Values.rootUser }} {{- .Values.rootUser | toString }} {{- else }} {{- include "minio.getValueFromSecret" (dict "Namespace" .Release.Namespace "Name" (include "minio.fullname" .) "Length" 20 "Key" "rootUser") }} {{- end }} {{- end -}} {{- define "minio.root.password" -}} {{- if .Values.rootPassword }} {{- .Values.rootPassword | toString }} {{- else }} {{- include ...

index $obj .Key | b64dec -}} {{- else -}} {{- randAlphaNum $len -}} {{- end -}} {{- end }} {{- define "minio.root.username" -}} {{- if .Values.rootUser }} {{- .Values.rootUser | toString }} {{- else }} {{- include "minio.getValueFromSecret" (dict "Namespace" .Release.Namespace "Name" (include "minio.fullname" .) "Length" 20 "Key" "rootUser") }} {{- end }} {{- end -}} {{- define "minio.root.password" -}} {{- if .Values.rootPassword }} {{- .Values.rootPassword | toString }} {{- else }} {{- include ...

index $obj .Key | b64dec -}} {{- else -}} {{- randAlphaNum $len -}} {{- end -}} {{- end }} {{- define "minio.root.username" -}} {{- if .Values.rootUser }} {{- .Values.rootUser | toString }} {{- else }} {{- include "minio.getValueFromSecret" (dict "Namespace" .Release.Namespace "Name" (include "minio.fullname" .) "Length" 20 "Key" "rootUser") }} {{- end }} {{- end -}} {{- define "minio.root.password" -}} {{- if .Values.rootPassword }} {{- .Values.rootPassword | toString }} {{- else }} {{- include ...

index $obj .Key | b64dec -}} {{- else -}} {{- randAlphaNum $len -}} {{- end -}} {{- end }} {{- define "minio.root.username" -}} {{- if .Values.rootUser }} {{- .Values.rootUser | toString }} {{- else }} {{- include "minio.getValueFromSecret" (dict "Namespace" .Release.Namespace "Name" (include "minio.fullname" .) "Length" 20 "Key" "rootUser") }} {{- end }} {{- end -}} {{- define "minio.root.password" -}} {{- if .Values.rootPassword }} {{- .Values.rootPassword | toString }} {{- else }} {{- include ...

index $obj .Key | b64dec -}} {{- else -}} {{- randAlphaNum $len -}} {{- end -}} {{- end }} {{- define "minio.root.username" -}} {{- if .Values.rootUser }} {{- .Values.rootUser | toString }} {{- else }} {{- include "minio.getValueFromSecret" (dict "Namespace" .Release.Namespace "Name" (include "minio.fullname" .) "Length" 20 "Key" "rootUser") }} {{- end }} {{- end -}} {{- define "minio.root.password" -}} {{- if .Values.rootPassword }} {{- .Values.rootPassword | toString }} {{- else }} {{- include ...

index $obj .Key | b64dec -}} {{- else -}} {{- randAlphaNum $len -}} {{- end -}} {{- end }} {{- define "minio.root.username" -}} {{- if .Values.rootUser }} {{- .Values.rootUser | toString }} {{- else }} {{- include "minio.getValueFromSecret" (dict "Namespace" .Release.Namespace "Name" (include "minio.fullname" .) "Length" 20 "Key" "rootUser") }} {{- end }} {{- end -}} {{- define "minio.root.password" -}} {{- if .Values.rootPassword }} {{- .Values.rootPassword | toString }} {{- else }} {{- include ...