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More spring cleaning for privs, add test

This commit is contained in:
Oystein Kristoffer Tveit 2024-08-07 23:00:38 +02:00
parent 1bb1c133e8
commit 011bcf9edc
Signed by: oysteikt
GPG Key ID: 9F2F7D8250F35146
3 changed files with 377 additions and 285 deletions
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285
src/cli/database_command.rs
View File

@ -1,8 +1,6 @@
use anyhow::{anyhow, Context};
use anyhow::Context;
use clap::Parser;
use dialoguer::Editor;
use indoc::indoc;
use itertools::Itertools;
use prettytable::{Cell, Row, Table};
use sqlx::{Connection, MySqlConnection};
@ -285,142 +283,6 @@ async fn show_database_privileges(
Ok(())
}
/// See documentation for `DatabaseCommand::EditDbPrivs`.
fn parse_privilege_table_cli_arg(arg: &str) -> anyhow::Result<DatabasePrivilegeRow> {
let parts: Vec<&str> = arg.split(':').collect();
if parts.len() != 3 {
anyhow::bail!("Invalid argument format. See `edit-db-privs --help` for more information.");
}
let db = parts[0].to_string();
let user = parts[1].to_string();
let privs = parts[2].to_string();
let mut result = DatabasePrivilegeRow {
db,
user,
select_priv: false,
insert_priv: false,
update_priv: false,
delete_priv: false,
create_priv: false,
drop_priv: false,
alter_priv: false,
index_priv: false,
create_tmp_table_priv: false,
lock_tables_priv: false,
references_priv: false,
};
for char in privs.chars() {
match char {
's' => result.select_priv = true,
'i' => result.insert_priv = true,
'u' => result.update_priv = true,
'd' => result.delete_priv = true,
'c' => result.create_priv = true,
'D' => result.drop_priv = true,
'a' => result.alter_priv = true,
'I' => result.index_priv = true,
't' => result.create_tmp_table_priv = true,
'l' => result.lock_tables_priv = true,
'r' => result.references_priv = true,
'A' => {
result.select_priv = true;
result.insert_priv = true;
result.update_priv = true;
result.delete_priv = true;
result.create_priv = true;
result.drop_priv = true;
result.alter_priv = true;
result.index_priv = true;
result.create_tmp_table_priv = true;
result.lock_tables_priv = true;
result.references_priv = true;
}
_ => anyhow::bail!("Invalid privilege character: {}", char),
}
}
Ok(result)
}
fn parse_privilege(yn: &str) -> anyhow::Result<bool> {
match yn.to_ascii_lowercase().as_str() {
"y" => Ok(true),
"n" => Ok(false),
_ => Err(anyhow!("Expected Y or N, found {}", yn)),
}
}
fn parse_privilege_data_from_editor(content: String) -> anyhow::Result<Vec<DatabasePrivilegeRow>> {
content
.trim()
.split('\n')
.map(|line| line.trim())
.filter(|line| !(line.starts_with('#') || line.starts_with("//") || line == &""))
.skip(1)
.map(|line| {
let line_parts: Vec<&str> = line.trim().split_ascii_whitespace().collect();
if line_parts.len() != DATABASE_PRIVILEGE_FIELDS.len() {
anyhow::bail!("")
}
Ok(DatabasePrivilegeRow {
db: (*line_parts.first().unwrap()).to_owned(),
user: (*line_parts.get(1).unwrap()).to_owned(),
select_priv: parse_privilege(line_parts.get(2).unwrap())
.context("Could not parse SELECT privilege")?,
insert_priv: parse_privilege(line_parts.get(3).unwrap())
.context("Could not parse INSERT privilege")?,
update_priv: parse_privilege(line_parts.get(4).unwrap())
.context("Could not parse UPDATE privilege")?,
delete_priv: parse_privilege(line_parts.get(5).unwrap())
.context("Could not parse DELETE privilege")?,
create_priv: parse_privilege(line_parts.get(6).unwrap())
.context("Could not parse CREATE privilege")?,
drop_priv: parse_privilege(line_parts.get(7).unwrap())
.context("Could not parse DROP privilege")?,
alter_priv: parse_privilege(line_parts.get(8).unwrap())
.context("Could not parse ALTER privilege")?,
index_priv: parse_privilege(line_parts.get(9).unwrap())
.context("Could not parse INDEX privilege")?,
create_tmp_table_priv: parse_privilege(line_parts.get(10).unwrap())
.context("Could not parse CREATE TEMPORARY TABLE privilege")?,
lock_tables_priv: parse_privilege(line_parts.get(11).unwrap())
.context("Could not parse LOCK TABLES privilege")?,
references_priv: parse_privilege(line_parts.get(12).unwrap())
.context("Could not parse REFERENCES privilege")?,
})
})
.collect::<anyhow::Result<Vec<DatabasePrivilegeRow>>>()
}
fn format_privileges_line(
privs: &DatabasePrivilegeRow,
username_len: usize,
database_name_len: usize,
) -> String {
// Format a privileges line by padding each value with spaces
// The first two fields are padded to the length of the longest username and database name
// The remaining fields are padded to the length of the corresponding field name
DATABASE_PRIVILEGE_FIELDS
.into_iter()
.map(|field| match field {
"db" => format!("{:width$}", privs.db, width = database_name_len),
"user" => format!("{:width$}", privs.user, width = username_len),
privilege => format!(
"{:width$}",
yn(privs.get_privilege_by_name(privilege)),
width = db_priv_field_human_readable_name(privilege).len()
),
})
.join(" ")
.trim()
.to_string()
}
pub async fn edit_privileges(
args: DatabaseEditPrivsArgs,
connection: &mut MySqlConnection,
@ -431,8 +293,45 @@ pub async fn edit_privileges(
get_all_database_privileges(connection).await?
};
// TODO: The data from args should not be absolute.
// In the current implementation, the user would need to
// provide all privileges for all users on all databases.
// The intended effect is to modify the privileges which have
// matching users and databases, as well as add any
// new db-user pairs. This makes it impossible to remove
// privileges, but that is an issue for another day.
let privileges_to_change = if !args.privs.is_empty() {
if let Some(name) = args.name {
parse_privilege_tables_from_args(&args)?
} else {
edit_privileges_with_editor(&privilege_data)?
};
for row in privileges_to_change.iter() {
if !user_exists(&row.user, connection).await? {
// TODO: allow user to return and correct their mistake
anyhow::bail!("User {} does not exist", row.user);
}
}
let diffs = diff_privileges(privilege_data, &privileges_to_change);
if diffs.is_empty() {
println!("No changes to make.");
return Ok(());
}
// TODO: Add confirmation prompt.
apply_privilege_diffs(diffs, connection).await?;
Ok(())
}
pub fn parse_privilege_tables_from_args(
args: &DatabaseEditPrivsArgs,
) -> anyhow::Result<Vec<DatabasePrivilegeRow>> {
debug_assert!(!args.privs.is_empty());
let result = if let Some(name) = &args.name {
args.privs
.iter()
.map(|p| {
@ -448,110 +347,24 @@ pub async fn edit_privileges(
.context(format!("Failed parsing database privileges: `{}`", &p))
})
.collect::<anyhow::Result<Vec<DatabasePrivilegeRow>>>()?
};
Ok(result)
}
} else {
let comment = indoc! {r#"
# Welcome to the privilege editor.
# Each line defines what privileges a single user has on a single database.
# The first two columns respectively represent the database name and the user, and the remaining columns are the privileges.
# If the user should have a certain privilege, write 'Y', otherwise write 'N'.
#
# Lines starting with '#' are comments and will be ignored.
"#};
pub fn edit_privileges_with_editor(
privilege_data: &[DatabasePrivilegeRow],
) -> anyhow::Result<Vec<DatabasePrivilegeRow>> {
let unix_user = get_current_unix_user()?;
let example_user = format!("{}_user", unix_user.name);
let example_db = format!("{}_db", unix_user.name);
let longest_username = privilege_data
.iter()
.map(|p| p.user.len())
.max()
.unwrap_or(example_user.len());
let longest_database_name = privilege_data
.iter()
.map(|p| p.db.len())
.max()
.unwrap_or(example_db.len());
let mut header: Vec<_> = DATABASE_PRIVILEGE_FIELDS
.into_iter()
.map(db_priv_field_human_readable_name)
.collect();
// Pad the first two columns with spaces to align the privileges.
header[0] = format!("{:width$}", header[0], width = longest_database_name);
header[1] = format!("{:width$}", header[1], width = longest_username);
let example_line = format_privileges_line(
&DatabasePrivilegeRow {
db: example_db,
user: example_user,
select_priv: true,
insert_priv: true,
update_priv: true,
delete_priv: true,
create_priv: false,
drop_priv: false,
alter_priv: false,
index_priv: false,
create_tmp_table_priv: false,
lock_tables_priv: false,
references_priv: false,
},
longest_username,
longest_database_name,
);
let editor_content =
generate_editor_content_from_privilege_data(privilege_data, &unix_user.name);
// TODO: handle errors better here
let result = Editor::new()
.extension("tsv")
.edit(
format!(
"{}\n{}\n{}",
comment,
header.join(" "),
if privilege_data.is_empty() {
format!("# {}", example_line)
} else {
privilege_data
.iter()
.map(|privs| {
format_privileges_line(
privs,
longest_username,
longest_database_name,
)
})
.join("\n")
}
)
.as_str(),
)?
.edit(&editor_content)?
.unwrap();
parse_privilege_data_from_editor(result)
.context("Could not parse privilege data from editor")?
};
for row in privileges_to_change.iter() {
if !user_exists(&row.user, connection).await? {
// TODO: allow user to return and correct their mistake
anyhow::bail!("User {} does not exist", row.user);
}
}
let diffs = diff_privileges(privilege_data, &privileges_to_change).await;
if diffs.is_empty() {
println!("No changes to make.");
return Ok(());
}
// TODO: Add confirmation prompt.
apply_privilege_diffs(diffs, connection).await?;
Ok(())
parse_privilege_data_from_editor_content(result)
.context("Could not parse privilege data from editor")
}

11
src/core/common.rs
View File

@ -172,13 +172,10 @@ pub(crate) fn yn(b: bool) -> &'static str {
}
#[inline]
pub(crate) fn rev_yn(s: &str) -> bool {
pub(crate) fn rev_yn(s: &str) -> Option<bool> {
match s.to_lowercase().as_str() {
"y" => true,
"n" => false,
_ => {
log::warn!("Invalid value for privilege: {}", s);
false
}
"y" => Some(true),
"n" => Some(false),
_ => None,
}
}

372
src/core/database_privilege_operations.rs
View File

@ -15,7 +15,7 @@
use std::collections::HashMap;
use anyhow::Context;
use anyhow::{anyhow, Context};
use indoc::indoc;
use itertools::Itertools;
use serde::{Deserialize, Serialize};
@ -123,22 +123,33 @@ impl DatabasePrivilegeRow {
}
}
#[inline]
fn get_row_priv_field(row: &MySqlRow, field: &str) -> Result<bool, sqlx::Error> {
match rev_yn(row.try_get(field)?) {
Some(val) => Ok(val),
_ => {
log::warn!("Invalid value for privilege: {}", field);
Ok(false)
}
}
}
impl FromRow<'_, MySqlRow> for DatabasePrivilegeRow {
fn from_row(row: &MySqlRow) -> Result<Self, sqlx::Error> {
Ok(Self {
db: row.try_get("db")?,
user: row.try_get("user")?,
select_priv: row.try_get("select_priv").map(rev_yn)?,
insert_priv: row.try_get("insert_priv").map(rev_yn)?,
update_priv: row.try_get("update_priv").map(rev_yn)?,
delete_priv: row.try_get("delete_priv").map(rev_yn)?,
create_priv: row.try_get("create_priv").map(rev_yn)?,
drop_priv: row.try_get("drop_priv").map(rev_yn)?,
alter_priv: row.try_get("alter_priv").map(rev_yn)?,
index_priv: row.try_get("index_priv").map(rev_yn)?,
create_tmp_table_priv: row.try_get("create_tmp_table_priv").map(rev_yn)?,
lock_tables_priv: row.try_get("lock_tables_priv").map(rev_yn)?,
references_priv: row.try_get("references_priv").map(rev_yn)?,
select_priv: get_row_priv_field(row, "select_priv")?,
insert_priv: get_row_priv_field(row, "insert_priv")?,
update_priv: get_row_priv_field(row, "update_priv")?,
delete_priv: get_row_priv_field(row, "delete_priv")?,
create_priv: get_row_priv_field(row, "create_priv")?,
drop_priv: get_row_priv_field(row, "drop_priv")?,
alter_priv: get_row_priv_field(row, "alter_priv")?,
index_priv: get_row_priv_field(row, "index_priv")?,
create_tmp_table_priv: get_row_priv_field(row, "create_tmp_table_priv")?,
lock_tables_priv: get_row_priv_field(row, "lock_tables_priv")?,
references_priv: get_row_priv_field(row, "references_priv")?,
})
}
}
@ -191,9 +202,239 @@ pub async fn get_all_database_privileges(
Ok(result)
}
/*******************/
/* PRIVILEGE DIFFS */
/*******************/
/*************************/
/* CLI INTERFACE PARSING */
/*************************/
/// See documentation for `DatabaseCommand::EditDbPrivs`.
pub fn parse_privilege_table_cli_arg(arg: &str) -> anyhow::Result<DatabasePrivilegeRow> {
let parts: Vec<&str> = arg.split(':').collect();
if parts.len() != 3 {
anyhow::bail!("Invalid argument format. See `edit-db-privs --help` for more information.");
}
let db = parts[0].to_string();
let user = parts[1].to_string();
let privs = parts[2].to_string();
let mut result = DatabasePrivilegeRow {
db,
user,
select_priv: false,
insert_priv: false,
update_priv: false,
delete_priv: false,
create_priv: false,
drop_priv: false,
alter_priv: false,
index_priv: false,
create_tmp_table_priv: false,
lock_tables_priv: false,
references_priv: false,
};
for char in privs.chars() {
match char {
's' => result.select_priv = true,
'i' => result.insert_priv = true,
'u' => result.update_priv = true,
'd' => result.delete_priv = true,
'c' => result.create_priv = true,
'D' => result.drop_priv = true,
'a' => result.alter_priv = true,
'I' => result.index_priv = true,
't' => result.create_tmp_table_priv = true,
'l' => result.lock_tables_priv = true,
'r' => result.references_priv = true,
'A' => {
result.select_priv = true;
result.insert_priv = true;
result.update_priv = true;
result.delete_priv = true;
result.create_priv = true;
result.drop_priv = true;
result.alter_priv = true;
result.index_priv = true;
result.create_tmp_table_priv = true;
result.lock_tables_priv = true;
result.references_priv = true;
}
_ => anyhow::bail!("Invalid privilege character: {}", char),
}
}
Ok(result)
}
/**********************************/
/* EDITOR CONTENT PARSING/DISPLAY */
/**********************************/
// TODO: merge with `rev_yn` in `common.rs`
fn parse_privilege(yn: &str) -> anyhow::Result<bool> {
match yn.to_ascii_lowercase().as_str() {
"y" => Ok(true),
"n" => Ok(false),
_ => Err(anyhow!("Expected Y or N, found {}", yn)),
}
}
pub fn parse_privilege_data_from_editor_content(
content: String,
) -> anyhow::Result<Vec<DatabasePrivilegeRow>> {
content
.trim()
.split('\n')
.map(|line| line.trim())
.filter(|line| !(line.starts_with('#') || line.starts_with("//") || line == &""))
.skip(1)
.map(|line| {
let line_parts: Vec<&str> = line.trim().split_ascii_whitespace().collect();
if line_parts.len() != DATABASE_PRIVILEGE_FIELDS.len() {
anyhow::bail!("")
}
Ok(DatabasePrivilegeRow {
db: (*line_parts.first().unwrap()).to_owned(),
user: (*line_parts.get(1).unwrap()).to_owned(),
select_priv: parse_privilege(line_parts.get(2).unwrap())
.context("Could not parse SELECT privilege")?,
insert_priv: parse_privilege(line_parts.get(3).unwrap())
.context("Could not parse INSERT privilege")?,
update_priv: parse_privilege(line_parts.get(4).unwrap())
.context("Could not parse UPDATE privilege")?,
delete_priv: parse_privilege(line_parts.get(5).unwrap())
.context("Could not parse DELETE privilege")?,
create_priv: parse_privilege(line_parts.get(6).unwrap())
.context("Could not parse CREATE privilege")?,
drop_priv: parse_privilege(line_parts.get(7).unwrap())
.context("Could not parse DROP privilege")?,
alter_priv: parse_privilege(line_parts.get(8).unwrap())
.context("Could not parse ALTER privilege")?,
index_priv: parse_privilege(line_parts.get(9).unwrap())
.context("Could not parse INDEX privilege")?,
create_tmp_table_priv: parse_privilege(line_parts.get(10).unwrap())
.context("Could not parse CREATE TEMPORARY TABLE privilege")?,
lock_tables_priv: parse_privilege(line_parts.get(11).unwrap())
.context("Could not parse LOCK TABLES privilege")?,
references_priv: parse_privilege(line_parts.get(12).unwrap())
.context("Could not parse REFERENCES privilege")?,
})
})
.collect::<anyhow::Result<Vec<DatabasePrivilegeRow>>>()
}
/// Generates a single row of the privileges table for the editor.
pub fn format_privileges_line(
privs: &DatabasePrivilegeRow,
username_len: usize,
database_name_len: usize,
) -> String {
// Format a privileges line by padding each value with spaces
// The first two fields are padded to the length of the longest username and database name
// The remaining fields are padded to the length of the corresponding field name
DATABASE_PRIVILEGE_FIELDS
.into_iter()
.map(|field| match field {
"db" => format!("{:width$}", privs.db, width = database_name_len),
"user" => format!("{:width$}", privs.user, width = username_len),
privilege => format!(
"{:width$}",
yn(privs.get_privilege_by_name(privilege)),
width = db_priv_field_human_readable_name(privilege).len()
),
})
.join(" ")
.trim()
.to_string()
}
const EDITOR_COMMENT: &str = r#"
# Welcome to the privilege editor.
# Each line defines what privileges a single user has on a single database.
# The first two columns respectively represent the database name and the user, and the remaining columns are the privileges.
# If the user should have a certain privilege, write 'Y', otherwise write 'N'.
#
# Lines starting with '#' are comments and will be ignored.
"#;
/// Generates the content for the privilege editor.
///
/// The unix user is used in case there are no privileges to edit,
/// so that the user can see an example line based on their username.
pub fn generate_editor_content_from_privilege_data(
privilege_data: &[DatabasePrivilegeRow],
unix_user: &str,
) -> String {
let example_user = format!("{}_user", unix_user);
let example_db = format!("{}_db", unix_user);
// NOTE: `.max()`` fails when the iterator is empty.
// In this case, we know that the only fields in the
// editor will be the example user and example db name.
// Hence, it's put as the fallback value, despite not really
// being a "fallback" in the normal sense.
let longest_username = privilege_data
.iter()
.map(|p| p.user.len())
.max()
.unwrap_or(example_user.len());
let longest_database_name = privilege_data
.iter()
.map(|p| p.db.len())
.max()
.unwrap_or(example_db.len());
let mut header: Vec<_> = DATABASE_PRIVILEGE_FIELDS
.into_iter()
.map(db_priv_field_human_readable_name)
.collect();
// Pad the first two columns with spaces to align the privileges.
header[0] = format!("{:width$}", header[0], width = longest_database_name);
header[1] = format!("{:width$}", header[1], width = longest_username);
let example_line = format_privileges_line(
&DatabasePrivilegeRow {
db: example_db,
user: example_user,
select_priv: true,
insert_priv: true,
update_priv: true,
delete_priv: true,
create_priv: false,
drop_priv: false,
alter_priv: false,
index_priv: false,
create_tmp_table_priv: false,
lock_tables_priv: false,
references_priv: false,
},
longest_username,
longest_database_name,
);
format!(
"{}\n{}\n{}",
EDITOR_COMMENT,
header.join(" "),
if privilege_data.is_empty() {
format!("# {}", example_line)
} else {
privilege_data
.iter()
.map(|privs| format_privileges_line(privs, longest_username, longest_database_name))
.join("\n")
}
)
}
/*****************************/
/* CALCULATE PRIVILEGE DIFFS */
/*****************************/
/// This struct represents encapsulates the differences between two
/// instances of privilege sets for a single user on a single database.
@ -206,7 +447,7 @@ pub struct DatabasePrivilegeRowDiff {
pub diff: Vec<DatabasePrivilegeChange>,
}
/// This enum represents a change in a single privilege.
/// This enum represents a change for a single privilege.
#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
pub enum DatabasePrivilegeChange {
YesToNo(String),
@ -223,6 +464,7 @@ impl DatabasePrivilegeChange {
}
}
/// This enum encapsulates whether a [`DatabasePrivilegeRow`] was intrduced, modified or deleted.
#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
pub enum DatabasePrivilegesDiff {
New(DatabasePrivilegeRow),
@ -230,7 +472,7 @@ pub enum DatabasePrivilegesDiff {
Deleted(DatabasePrivilegeRow),
}
pub async fn diff_privileges(
pub fn diff_privileges(
from: Vec<DatabasePrivilegeRow>,
to: &[DatabasePrivilegeRow],
) -> Vec<DatabasePrivilegesDiff> {
@ -268,6 +510,7 @@ pub async fn diff_privileges(
result
}
/// Uses the resulting diffs to make modifications to the database.
pub async fn apply_privilege_diffs(
diffs: Vec<DatabasePrivilegesDiff>,
connection: &mut MySqlConnection,
@ -333,6 +576,10 @@ pub async fn apply_privilege_diffs(
Ok(())
}
/*********/
/* TESTS */
/*********/
#[cfg(test)]
mod tests {
use super::*;
@ -351,9 +598,51 @@ mod tests {
assert_eq!(DatabasePrivilegeChange::new(false, false, "test"), None);
}
#[tokio::test]
async fn test_diff_privileges() {
#[test]
fn test_diff_privileges() {
let from = vec![DatabasePrivilegeRow {
db: "db".to_owned(),
user: "user".to_owned(),
select_priv: true,
insert_priv: true,
update_priv: true,
delete_priv: true,
create_priv: true,
drop_priv: true,
alter_priv: true,
index_priv: false,
create_tmp_table_priv: true,
lock_tables_priv: true,
references_priv: false,
}];
let mut to = from.clone();
to[0].select_priv = false;
to[0].insert_priv = false;
to[0].index_priv = true;
let diffs = diff_privileges(from, &to);
assert_eq!(
diffs,
vec![DatabasePrivilegesDiff::Modified(DatabasePrivilegeRowDiff {
db: "db".to_owned(),
user: "user".to_owned(),
diff: vec![
DatabasePrivilegeChange::YesToNo("select_priv".to_owned()),
DatabasePrivilegeChange::YesToNo("insert_priv".to_owned()),
DatabasePrivilegeChange::NoToYes("index_priv".to_owned()),
],
})]
);
assert!(matches!(&diffs[0], DatabasePrivilegesDiff::Modified(_)));
}
#[test]
fn ensure_generated_and_parsed_editor_content_is_equal() {
let permissions = vec![
DatabasePrivilegeRow {
db: "db".to_owned(),
user: "user".to_owned(),
select_priv: true,
@ -367,35 +656,28 @@ mod tests {
create_tmp_table_priv: true,
lock_tables_priv: true,
references_priv: true,
}];
let to = vec![DatabasePrivilegeRow {
db: "db".to_owned(),
user: "user".to_owned(),
},
DatabasePrivilegeRow {
db: "db2".to_owned(),
user: "user2".to_owned(),
select_priv: false,
insert_priv: true,
update_priv: true,
delete_priv: true,
create_priv: true,
drop_priv: true,
alter_priv: true,
index_priv: true,
create_tmp_table_priv: true,
lock_tables_priv: true,
references_priv: true,
}];
insert_priv: false,
update_priv: false,
delete_priv: false,
create_priv: false,
drop_priv: false,
alter_priv: false,
index_priv: false,
create_tmp_table_priv: false,
lock_tables_priv: false,
references_priv: false,
},
];
let diffs = diff_privileges(from, &to).await;
let content = generate_editor_content_from_privilege_data(&permissions, "user");
assert_eq!(
diffs,
vec![DatabasePrivilegesDiff::Modified(DatabasePrivilegeRowDiff {
db: "db".to_owned(),
user: "user".to_owned(),
diff: vec![DatabasePrivilegeChange::YesToNo("select_priv".to_owned())],
})]
);
let parsed_permissions = parse_privilege_data_from_editor_content(content).unwrap();
assert!(matches!(&diffs[0], DatabasePrivilegesDiff::Modified(_)));
assert_eq!(permissions, parsed_permissions);
}
}