mirror of https://github.com/sharkdp/bat.git
82 lines
2.7 KiB
Rust
82 lines
2.7 KiB
Rust
#![allow(unused)] // Because indirectly included by e.g. system_wide_config.rs, but not used
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use assert_cmd::Command;
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use predicates::prelude::predicate;
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use std::env;
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use std::path::{Path, PathBuf};
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/// For some tests we want mocked versions of some pagers
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/// This fn returns the absolute path to the directory with these mocked pagers
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fn get_mocked_pagers_dir() -> PathBuf {
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let cargo_manifest_dir = env::var("CARGO_MANIFEST_DIR").expect("Missing CARGO_MANIFEST_DIR");
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Path::new(&cargo_manifest_dir)
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.join("tests")
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.join("mocked-pagers")
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}
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/// On Unix: 'most' -> 'most'
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/// On Windows: 'most' -> 'most.bat'
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pub fn from(base: &str) -> String {
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let mut cmd_and_args = shell_words::split(base).unwrap();
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let suffix = if cfg!(windows) { ".bat" } else { "" };
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let mut out_cmd = format!("{}{}", cmd_and_args.first().unwrap(), suffix);
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if (cmd_and_args.len() > 1) {
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out_cmd.push(' ');
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out_cmd.push_str(cmd_and_args[1..].to_vec().join(" ").as_str());
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}
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out_cmd
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}
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/// Prepends a directory to the PATH environment variable
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/// Returns the original value for later restoration
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fn prepend_dir_to_path_env_var(dir: PathBuf) -> String {
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// Get current PATH
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let original_path = env::var("PATH").expect("No PATH?!");
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// Add the new dir first
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let mut split_paths = env::split_paths(&original_path).collect::<Vec<_>>();
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split_paths.insert(0, dir);
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// Set PATH with the new dir
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let new_path = env::join_paths(split_paths).expect("Failed to join paths");
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env::set_var("PATH", new_path);
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// Return the original value for later restoration of it
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original_path
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}
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/// Helper to restore the value of PATH
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fn restore_path(original_path: String) {
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env::set_var("PATH", original_path);
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}
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/// Allows test to run that require our mocked versions of 'more' and 'most'
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/// in PATH. Temporarily changes PATH while the test code runs, and then restore it
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/// to avoid pollution of global state
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pub fn with_mocked_versions_of_more_and_most_in_path(actual_test: fn()) {
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let original_path = prepend_dir_to_path_env_var(get_mocked_pagers_dir());
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// Make sure our own variants of 'more' and 'most' are used
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Command::new(from("more"))
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.assert()
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.success()
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.stdout(predicate::str::contains("I am more"));
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Command::new(from("most"))
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.assert()
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.success()
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.stdout(predicate::str::contains("I am most"));
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Command::new(from("echo"))
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.arg("foobar")
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.assert()
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.success()
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.stdout(predicate::str::contains("foobar"));
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// Now run the actual test
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actual_test();
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// Make sure to restore PATH since it is global state
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restore_path(original_path);
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}
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