Merge pull request #3652 from epage/stdio

test(output): Ensure correct streams

src/bin/stdio-fixture.rs

@@ -0,0 +1,14 @@
+fn main() {
+    let cmd = clap::Command::new("stdio-fixture")
+        .version("1.0")
+        .long_version("1.0 - a2132c")
+        .arg_required_else_help(true)
+        .subcommand(clap::Command::new("more"))
+        .arg(
+            clap::Arg::new("verbose")
+                .long("--verbose")
+                .help("log")
+                .long_help("more log"),
+        );
+    cmd.get_matches();
+}

tests/ui.rs

@@ -0,0 +1,33 @@
+#![cfg(not(tarpaulin))]
+
+#[test]
+fn ui_tests() {
+    let t = trycmd::TestCases::new();
+    let features = [
+        #[cfg(feature = "std")]
+        "std",
+        #[cfg(feature = "derive")]
+        "derive",
+        #[cfg(feature = "cargo")]
+        "cargo",
+        #[cfg(feature = "color")]
+        "color",
+        #[cfg(feature = "env")]
+        "env",
+        #[cfg(feature = "suggestions")]
+        "suggestions",
+        #[cfg(feature = "unicode")]
+        "unicode",
+        #[cfg(feature = "wrap_help")]
+        "wrap_help",
+        #[cfg(feature = "unstable-replace")]
+        "unstable-replace",
+        #[cfg(feature = "unstable-multicall")]
+        "unstable-multicall",
+        #[cfg(feature = "unstable-grouped")]
+        "unstable-grouped",
+    ]
+    .join(" ");
+    t.register_bins(trycmd::cargo::compile_examples(["--features", &features]).unwrap());
+    t.case("tests/ui/*.toml");
+}

tests/ui/V_flag_stdout.toml

@@ -0,0 +1,7 @@
+bin.name = "stdio-fixture"
+args = ["-V"]
+status.code = 0
+stdout = """
+stdio-fixture 1.0
+"""
+stderr = ""

tests/ui/arg_required_else_help_stderr.toml

@@ -0,0 +1,19 @@
+bin.name = "stdio-fixture"
+args = []
+status.code = 2
+stdout = ""
+stderr = """
+stdio-fixture 1.0
+
+USAGE:
+    stdio-fixture[EXE] [OPTIONS] [SUBCOMMAND]
+
+OPTIONS:
+    -h, --help       Print help information
+    -V, --version    Print version information
+        --verbose    log
+
+SUBCOMMANDS:
+    help    Print this message or the help of the given subcommand(s)
+    more    
+"""

tests/ui/error_stderr.toml

@@ -0,0 +1,14 @@
+bin.name = "stdio-fixture"
+args = ["--unknown-argument"]
+status.code = 2
+stdout = ""
+stderr = """
+error: Found argument '--unknown-argument' which wasn't expected, or isn't valid in this context
+
+\tIf you tried to supply `--unknown-argument` as a value rather than a flag, use `-- --unknown-argument`
+
+USAGE:
+    stdio-fixture[EXE] [OPTIONS] [SUBCOMMAND]
+
+For more information try --help
+"""

tests/ui/h_flag_stdout.toml

@@ -0,0 +1,19 @@
+bin.name = "stdio-fixture"
+args = ["-h"]
+status.code = 0
+stdout = """
+stdio-fixture 1.0
+
+USAGE:
+    stdio-fixture[EXE] [OPTIONS] [SUBCOMMAND]
+
+OPTIONS:
+    -h, --help       Print help information
+    -V, --version    Print version information
+        --verbose    log
+
+SUBCOMMANDS:
+    help    Print this message or the help of the given subcommand(s)
+    more    
+"""
+stderr = ""

tests/ui/help_cmd_stdout.toml

@@ -0,0 +1,26 @@
+bin.name = "stdio-fixture"
+args = ["help"]
+status.code = 0
+stdout = """
+stdio-fixture 1.0
+
+USAGE:
+    stdio-fixture[EXE] [OPTIONS] [SUBCOMMAND]
+
+OPTIONS:
+    -h, --help
+            Print help information
+
+    -V, --version
+            Print version information
+
+        --verbose
+            more log
+
+SUBCOMMANDS:
+    help
+            Print this message or the help of the given subcommand(s)
+    more
+            
+"""
+stderr = ""

tests/ui/help_flag_stdout.toml

@@ -0,0 +1,26 @@
+bin.name = "stdio-fixture"
+args = ["--help"]
+status.code = 0
+stdout = """
+stdio-fixture 1.0
+
+USAGE:
+    stdio-fixture[EXE] [OPTIONS] [SUBCOMMAND]
+
+OPTIONS:
+    -h, --help
+            Print help information
+
+    -V, --version
+            Print version information
+
+        --verbose
+            more log
+
+SUBCOMMANDS:
+    help
+            Print this message or the help of the given subcommand(s)
+    more
+            
+"""
+stderr = ""

tests/ui/version_flag_stdout.toml

@@ -0,0 +1,7 @@
+bin.name = "stdio-fixture"
+args = ["--version"]
+status.code = 0
+stdout = """
+stdio-fixture 1.0 - a2132c
+"""
+stderr = ""