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df: read block size from env vars

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This commit is contained in:
Daniel Hofstetter 2022-05-08 17:09:05 +02:00
parent c818ca0039
commit ea284ce55e
3 changed files with 122 additions and 5 deletions
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99
tests/by-util/test_df.rs
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@ -532,6 +532,105 @@ fn test_block_size_in_posix_portability_mode() {
assert_eq!(get_header("1MB"), "1000000-blocks");
}
#[test]
fn test_block_size_from_env() {
fn get_header(env_var: &str, env_value: &str) -> String {
let output = new_ucmd!()
.arg("--output=size")
.env(env_var, env_value)
.succeeds()
.stdout_move_str();
output.lines().next().unwrap().to_string()
}
assert_eq!(get_header("DF_BLOCK_SIZE", "111"), "111B-blocks");
assert_eq!(get_header("BLOCK_SIZE", "222"), "222B-blocks");
assert_eq!(get_header("BLOCKSIZE", "333"), "333B-blocks");
}
#[test]
fn test_block_size_from_env_precedences() {
fn get_header(one: (&str, &str), two: (&str, &str)) -> String {
let (k1, v1) = one;
let (k2, v2) = two;
let output = new_ucmd!()
.arg("--output=size")
.env(k1, v1)
.env(k2, v2)
.succeeds()
.stdout_move_str();
output.lines().next().unwrap().to_string()
}
let df_block_size = ("DF_BLOCK_SIZE", "111");
let block_size = ("BLOCK_SIZE", "222");
let blocksize = ("BLOCKSIZE", "333");
assert_eq!(get_header(df_block_size, block_size), "111B-blocks");
assert_eq!(get_header(df_block_size, blocksize), "111B-blocks");
assert_eq!(get_header(block_size, blocksize), "222B-blocks");
}
#[test]
fn test_precedence_of_block_size_arg_over_env() {
let output = new_ucmd!()
.args(&["-B", "999", "--output=size"])
.env("DF_BLOCK_SIZE", "111")
.succeeds()
.stdout_move_str();
let header = output.lines().next().unwrap().to_string();
assert_eq!(header, "999B-blocks");
}
#[test]
fn test_invalid_block_size_from_env() {
let default_block_size_header = "1K-blocks";
let output = new_ucmd!()
.arg("--output=size")
.env("DF_BLOCK_SIZE", "invalid")
.succeeds()
.stdout_move_str();
let header = output.lines().next().unwrap().to_string();
assert_eq!(header, default_block_size_header);
let output = new_ucmd!()
.arg("--output=size")
.env("DF_BLOCK_SIZE", "invalid")
.env("BLOCK_SIZE", "222")
.succeeds()
.stdout_move_str();
let header = output.lines().next().unwrap().to_string();
assert_eq!(header, default_block_size_header);
}
#[test]
fn test_ignore_block_size_from_env_in_posix_portability_mode() {
let default_block_size_header = "1024-blocks";
let output = new_ucmd!()
.arg("-P")
.env("DF_BLOCK_SIZE", "111")
.env("BLOCK_SIZE", "222")
.env("BLOCKSIZE", "333")
.succeeds()
.stdout_move_str();
let header = output
.lines()
.next()
.unwrap()
.to_string()
.split_whitespace()
.nth(1)
.unwrap()
.to_string();
assert_eq!(header, default_block_size_header);
}
#[test]
fn test_too_large_block_size() {
fn run_command(size: &str) {