Add a test for only options command

Signed-off-by: hi-rustin <[email protected]>

Author: 0xPoe

tests/suite/cli-ui/rustup/rustup_only_options_stdout.toml

@@ -0,0 +1,48 @@
+bin.name = "rustup"
+args = ["-v"]
+status.code = 1
+stdout = """
+rustup [..]
+The Rust toolchain installer
+
+USAGE:
+    rustup[EXE] [OPTIONS] [+toolchain] <SUBCOMMAND>
+
+ARGS:
+    <+toolchain>    release channel (e.g. +stable) or custom toolchain to set override
+
+OPTIONS:
+    -v, --verbose    Enable verbose output
+    -q, --quiet      Disable progress output
+    -h, --help       Print help information
+    -V, --version    Print version information
+
+SUBCOMMANDS:
+    show           Show the active and installed toolchains or profiles
+    update         Update Rust toolchains and rustup
+    check          Check for updates to Rust toolchains and rustup
+    default        Set the default toolchain
+    toolchain      Modify or query the installed toolchains
+    target         Modify a toolchain's supported targets
+    component      Modify a toolchain's installed components
+    override       Modify directory toolchain overrides
+    run            Run a command with an environment configured for a given toolchain
+    which          Display which binary will be run for a given command
+    doc            Open the documentation for the current toolchain
+...
+    self           Modify the rustup installation
+    set            Alter rustup settings
+    completions    Generate tab-completion scripts for your shell
+    help           Print this message or the help of the given subcommand(s)
+
+DISCUSSION:
+    Rustup installs The Rust Programming Language from the official
+    release channels, enabling you to easily switch between stable,
+    beta, and nightly compilers and keep them updated. It makes
+    cross-compiling simpler with binary builds of the standard library
+    for common platforms.
+
+    If you are new to Rust consider running `rustup doc --book` to
+    learn Rust.
+"""
+stderr = ""