deps: drop regex, toml, indexmap - std-only minirx, toml_lite, inferred IndexMap

crates/noxis-core/src/config/from_toml/mod.rs

@@ -0,0 +1,172 @@
+//! Builds [`Config`](super::Config) from a parsed [`toml_lite::Table`].
+//!
+//! Deliberately *not* going through `serde::Deserialize`: `Config` has
+//! only a handful of fields and three small kebab-case enums, so a tiny
+//! hand-written visitor is less machinery (and fewer edge cases to worry
+//! about) than writing a generic `serde::Deserializer` over our `Value`
+//! tree. This keeps the TOML replacement fully decoupled from serde -
+//! the `Serialize`/`Deserialize` derives left on `Config` and friends are
+//! unrelated to this path and can be dropped independently later.
+
+mod sections;
+#[cfg(test)]
+mod tests;
+
+use super::toml_lite::{Table, Value};
+use super::{Config, PassId, Profile};
+
+type Res<T> = Result<T, String>;
+
+fn unknown_key(section: &str, key: &str) -> String {
+    format!("неизвестный ключ `{key}` в секции `{section}`")
+}
+
+fn expect_str<'a>(v: &'a Value, path: &str) -> Res<&'a str> {
+    match v {
+        Value::String(s) => Ok(s),
+        _ => Err(format!("`{path}` должен быть строкой")),
+    }
+}
+
+fn expect_bool(v: &Value, path: &str) -> Res<bool> {
+    match v {
+        Value::Bool(b) => Ok(*b),
+        _ => Err(format!("`{path}` должен быть bool")),
+    }
+}
+
+fn expect_usize(v: &Value, path: &str) -> Res<usize> {
+    match v {
+        Value::Integer(i) if *i >= 0 => Ok(*i as usize),
+        _ => Err(format!("`{path}` должен быть неотрицательным целым")),
+    }
+}
+
+fn expect_u64(v: &Value, path: &str) -> Res<u64> {
+    match v {
+        Value::Integer(i) if *i >= 0 => Ok(*i as u64),
+        _ => Err(format!("`{path}` должен быть неотрицательным целым")),
+    }
+}
+
+fn expect_string_vec(v: &Value, path: &str) -> Res<Vec<String>> {
+    match v {
+        Value::Array(items) => items
+            .iter()
+            .map(|item| expect_str(item, path).map(str::to_string))
+            .collect(),
+        _ => Err(format!("`{path}` должен быть массивом строк")),
+    }
+}
+
+fn parse_profile(s: &str) -> Res<Profile> {
+    match s {
+        "light" => Ok(Profile::Light),
+        "standard" => Ok(Profile::Standard),
+        "paranoid" => Ok(Profile::Paranoid),
+        "manual" => Ok(Profile::Manual),
+        other => Err(format!("неизвестный профиль `{other}`")),
+    }
+}
+
+fn parse_pass_id(s: &str) -> Res<PassId> {
+    [
+        PassId::Rename,
+        PassId::Strings,
+        PassId::Constants,
+        PassId::Flow,
+        PassId::Noise,
+        PassId::DebugInfo,
+        PassId::Resources,
+    ]
+    .into_iter()
+    .find(|id| id.as_str() == s)
+    .ok_or_else(|| format!("неизвестный пасс `{s}`"))
+}
+
+fn parse_pass_id_vec(v: &Value, path: &str) -> Res<Vec<PassId>> {
+    expect_string_vec(v, path)?
+        .iter()
+        .map(|s| parse_pass_id(s))
+        .collect()
+}
+
+/// Reject any key in `table` that isn't in `known` (mirrors serde's
+/// `deny_unknown_fields`).
+fn check_known_keys(table: &Table, known: &[&str], section: &str) -> Res<()> {
+    for key in table.keys() {
+        if !known.contains(&key.as_str()) {
+            return Err(unknown_key(section, key));
+        }
+    }
+    Ok(())
+}
+
+fn sub_table<'a>(table: &'a Table, key: &str) -> Res<Option<&'a Table>> {
+    match table.get(key) {
+        None => Ok(None),
+        Some(Value::Table(t)) => Ok(Some(t)),
+        Some(_) => Err(format!("`{key}` должен быть секцией `[{key}]`")),
+    }
+}
+
+/// Build a full [`Config`] from a parsed root table.
+pub(super) fn build(root: &Table) -> Res<Config> {
+    check_known_keys(
+        root,
+        &[
+            "profile",
+            "seed",
+            "enable",
+            "disable",
+            "keep",
+            "keep_resources",
+            "rename",
+            "strings",
+            "constants",
+            "flow",
+            "noise",
+            "debug",
+        ],
+        "<root>",
+    )?;
+
+    let mut cfg = Config::default();
+    if let Some(v) = root.get("profile") {
+        cfg.profile = parse_profile(expect_str(v, "profile")?)?;
+    }
+    if let Some(v) = root.get("seed") {
+        cfg.seed = Some(expect_u64(v, "seed")?);
+    }
+    if let Some(v) = root.get("enable") {
+        cfg.enable = parse_pass_id_vec(v, "enable")?;
+    }
+    if let Some(v) = root.get("disable") {
+        cfg.disable = parse_pass_id_vec(v, "disable")?;
+    }
+    if let Some(v) = root.get("keep") {
+        cfg.keep = expect_string_vec(v, "keep")?;
+    }
+    if let Some(v) = root.get("keep_resources") {
+        cfg.keep_resources = expect_string_vec(v, "keep_resources")?;
+    }
+    if let Some(t) = sub_table(root, "rename")? {
+        cfg.rename = sections::build_rename(t)?;
+    }
+    if let Some(t) = sub_table(root, "strings")? {
+        cfg.strings = sections::build_strings(t)?;
+    }
+    if let Some(t) = sub_table(root, "constants")? {
+        cfg.constants = sections::build_constants(t)?;
+    }
+    if let Some(t) = sub_table(root, "flow")? {
+        cfg.flow = sections::build_flow(t)?;
+    }
+    if let Some(t) = sub_table(root, "noise")? {
+        cfg.noise = sections::build_noise(t)?;
+    }
+    if let Some(t) = sub_table(root, "debug")? {
+        cfg.debug = sections::build_debug(t)?;
+    }
+    Ok(cfg)
+}

crates/noxis-core/src/config/from_toml/sections.rs

@@ -0,0 +1,184 @@
+//! Per-section struct population, split out of `from_toml::build` purely to
+//! stay under the per-file line budget (see `docs/README.md`).
+
+use super::super::sections::{
+    ConstantsConfig, DebugConfig, FlowConfig, NameStyle, NoiseConfig, RenameConfig, StringsConfig,
+};
+use super::super::toml_lite::Table;
+use super::{Res, check_known_keys, expect_bool, expect_str, expect_string_vec, expect_usize};
+
+fn parse_name_style(s: &str) -> Res<NameStyle> {
+    match s {
+        "short-latin" => Ok(NameStyle::ShortLatin),
+        "il-o0" => Ok(NameStyle::IlO0),
+        "unicode" => Ok(NameStyle::Unicode),
+        "mixed-latin" => Ok(NameStyle::MixedLatin),
+        "decoy-words" => Ok(NameStyle::DecoyWords),
+        "plausible" => Ok(NameStyle::Plausible),
+        other => Err(format!("неизвестный стиль имён `{other}`")),
+    }
+}
+
+pub(super) fn build_rename(t: &Table) -> Res<RenameConfig> {
+    check_known_keys(
+        t,
+        &[
+            "spread_packages",
+            "package_pool",
+            "class_style",
+            "member_style",
+            "local_style",
+            "widen_access",
+            "rename_enum_constants",
+            "rename_locals",
+            "rename_public_members",
+        ],
+        "rename",
+    )?;
+    let mut c = RenameConfig::default();
+    if let Some(v) = t.get("spread_packages") {
+        c.spread_packages = expect_bool(v, "rename.spread_packages")?;
+    }
+    if let Some(v) = t.get("package_pool") {
+        c.package_pool = expect_usize(v, "rename.package_pool")?;
+    }
+    if let Some(v) = t.get("class_style") {
+        c.class_style = parse_name_style(expect_str(v, "rename.class_style")?)?;
+    }
+    if let Some(v) = t.get("member_style") {
+        c.member_style = parse_name_style(expect_str(v, "rename.member_style")?)?;
+    }
+    if let Some(v) = t.get("local_style") {
+        c.local_style = parse_name_style(expect_str(v, "rename.local_style")?)?;
+    }
+    if let Some(v) = t.get("widen_access") {
+        c.widen_access = expect_bool(v, "rename.widen_access")?;
+    }
+    if let Some(v) = t.get("rename_enum_constants") {
+        c.rename_enum_constants = expect_bool(v, "rename.rename_enum_constants")?;
+    }
+    if let Some(v) = t.get("rename_locals") {
+        c.rename_locals = expect_bool(v, "rename.rename_locals")?;
+    }
+    if let Some(v) = t.get("rename_public_members") {
+        c.rename_public_members = expect_bool(v, "rename.rename_public_members")?;
+    }
+    Ok(c)
+}
+
+pub(super) fn build_strings(t: &Table) -> Res<StringsConfig> {
+    check_known_keys(
+        t,
+        &["schemes", "min_len", "split_above", "skip", "derive_key"],
+        "strings",
+    )?;
+    let mut c = StringsConfig::default();
+    if let Some(v) = t.get("schemes") {
+        c.schemes = expect_string_vec(v, "strings.schemes")?;
+    }
+    if let Some(v) = t.get("min_len") {
+        c.min_len = expect_usize(v, "strings.min_len")?;
+    }
+    if let Some(v) = t.get("split_above") {
+        c.split_above = expect_usize(v, "strings.split_above")?;
+    }
+    if let Some(v) = t.get("skip") {
+        c.skip = expect_string_vec(v, "strings.skip")?;
+    }
+    if let Some(v) = t.get("derive_key") {
+        c.derive_key = expect_bool(v, "strings.derive_key")?;
+    }
+    Ok(c)
+}
+
+pub(super) fn build_constants(t: &Table) -> Res<ConstantsConfig> {
+    check_known_keys(t, &["schemes", "max_predicates", "skip"], "constants")?;
+    let mut c = ConstantsConfig::default();
+    if let Some(v) = t.get("schemes") {
+        c.schemes = expect_string_vec(v, "constants.schemes")?;
+    }
+    if let Some(v) = t.get("max_predicates") {
+        c.max_predicates = expect_usize(v, "constants.max_predicates")?;
+    }
+    if let Some(v) = t.get("skip") {
+        c.skip = expect_string_vec(v, "constants.skip")?;
+    }
+    Ok(c)
+}
+
+pub(super) fn build_flow(t: &Table) -> Res<FlowConfig> {
+    check_known_keys(t, &["schemes", "max_insns", "encrypt_block_bodies"], "flow")?;
+    let mut c = FlowConfig::default();
+    if let Some(v) = t.get("schemes") {
+        c.schemes = expect_string_vec(v, "flow.schemes")?;
+    }
+    if let Some(v) = t.get("max_insns") {
+        c.max_insns = expect_usize(v, "flow.max_insns")?;
+    }
+    if let Some(v) = t.get("encrypt_block_bodies") {
+        c.encrypt_block_bodies = expect_bool(v, "flow.encrypt_block_bodies")?;
+    }
+    Ok(c)
+}
+
+pub(super) fn build_noise(t: &Table) -> Res<NoiseConfig> {
+    check_known_keys(
+        t,
+        &[
+            "junk_ratio",
+            "junk_methods_per_class",
+            "junk_annotations",
+            "weave_reachable",
+        ],
+        "noise",
+    )?;
+    let mut c = NoiseConfig::default();
+    if let Some(v) = t.get("junk_ratio") {
+        c.junk_ratio = expect_usize(v, "noise.junk_ratio")?;
+    }
+    if let Some(v) = t.get("junk_methods_per_class") {
+        c.junk_methods_per_class = expect_usize(v, "noise.junk_methods_per_class")?;
+    }
+    if let Some(v) = t.get("junk_annotations") {
+        c.junk_annotations = expect_usize(v, "noise.junk_annotations")?;
+    }
+    if let Some(v) = t.get("weave_reachable") {
+        c.weave_reachable = expect_bool(v, "noise.weave_reachable")?;
+    }
+    Ok(c)
+}
+
+pub(super) fn build_debug(t: &Table) -> Res<DebugConfig> {
+    check_known_keys(
+        t,
+        &[
+            "strip_line_numbers",
+            "fake_line_numbers",
+            "strip_local_variables",
+            "spoof_source_file",
+            "strip_source_file",
+            "strip_signatures",
+        ],
+        "debug",
+    )?;
+    let mut c = DebugConfig::default();
+    if let Some(v) = t.get("strip_line_numbers") {
+        c.strip_line_numbers = expect_bool(v, "debug.strip_line_numbers")?;
+    }
+    if let Some(v) = t.get("fake_line_numbers") {
+        c.fake_line_numbers = expect_bool(v, "debug.fake_line_numbers")?;
+    }
+    if let Some(v) = t.get("strip_local_variables") {
+        c.strip_local_variables = expect_bool(v, "debug.strip_local_variables")?;
+    }
+    if let Some(v) = t.get("spoof_source_file") {
+        c.spoof_source_file = expect_bool(v, "debug.spoof_source_file")?;
+    }
+    if let Some(v) = t.get("strip_source_file") {
+        c.strip_source_file = expect_bool(v, "debug.strip_source_file")?;
+    }
+    if let Some(v) = t.get("strip_signatures") {
+        c.strip_signatures = expect_bool(v, "debug.strip_signatures")?;
+    }
+    Ok(c)
+}

crates/noxis-core/src/config/from_toml/tests.rs

@@ -0,0 +1,64 @@
+//! Tests for TOML-subset → `Config` struct population.
+#![allow(clippy::expect_used, clippy::unwrap_used)]
+
+use super::*;
+use crate::config::sections::NameStyle;
+use crate::config::toml_lite;
+use crate::config::{PassId, Profile};
+
+fn build_from(text: &str) -> Res<Config> {
+    let table = toml_lite::parse(text).map_err(|e| e.to_string())?;
+    build(&table)
+}
+
+#[test]
+fn builds_defaults_from_empty_input() {
+    let cfg = build_from("").unwrap();
+    assert_eq!(cfg, Config::default());
+}
+
+#[test]
+fn overrides_top_level_and_section_fields() {
+    let cfg = build_from(
+        r#"
+        profile = "paranoid"
+        seed = 123
+        keep = ["com/example/Main"]
+        [rename]
+        package_pool = 4
+        "#,
+    )
+    .unwrap();
+    assert_eq!(cfg.profile, Profile::Paranoid);
+    assert_eq!(cfg.seed, Some(123));
+    assert_eq!(cfg.keep, vec!["com/example/Main".to_string()]);
+    assert_eq!(cfg.rename.package_pool, 4);
+}
+
+#[test]
+fn rejects_unknown_top_level_key() {
+    assert!(build_from("totally_unknown = 1").is_err());
+}
+
+#[test]
+fn rejects_unknown_section_key() {
+    assert!(build_from("[rename]\nbogus = 1\n").is_err());
+}
+
+#[test]
+fn parses_enable_disable_pass_lists() {
+    let cfg = build_from(
+        r#"enable = ["flow"]
+disable = ["strings"]
+"#,
+    )
+    .unwrap();
+    assert_eq!(cfg.enable, vec![PassId::Flow]);
+    assert_eq!(cfg.disable, vec![PassId::Strings]);
+}
+
+#[test]
+fn parses_name_style_in_rename_section() {
+    let cfg = build_from("[rename]\nclass_style = \"il-o0\"\n").unwrap();
+    assert_eq!(cfg.rename.class_style, NameStyle::IlO0);
+}

crates/noxis-core/src/config/mod.rs

@@ -1,6 +1,8 @@
 //! Конфигурация обфускации: профили, список пассов, keep-правила.
 
+mod from_toml;
 pub mod sections;
+mod toml_lite;
 
 use serde::{Deserialize, Serialize};
 
@@ -146,9 +148,10 @@ impl Config {
         self.profile.baseline().contains(&id)
     }
 
-    /// Загрузить конфиг из TOML.
+    /// Загрузить конфиг из TOML (наш подмножественный парсер, см. `toml_lite`).
     pub fn from_toml(text: &str) -> Result<Self, CoreError> {
-        toml::from_str(text).map_err(|e| CoreError::Config(e.to_string()))
+        let table = toml_lite::parse(text).map_err(|e| CoreError::Config(e.to_string()))?;
+        from_toml::build(&table).map_err(CoreError::Config)
     }
 
     /// Нормализовать значения, которые легко задать нулем/пустым списком.

crates/noxis-core/src/config/toml_lite/mod.rs

@@ -0,0 +1,218 @@
+//! Hand-rolled parser for the small TOML subset `Config` actually uses.
+//!
+//! We don't need full TOML (dates, multi-line strings, inline tables,
+//! arrays-of-tables): every fixture and hand-written config in this repo
+//! is flat `key = value` pairs grouped by `[section]` / `[section.sub]`
+//! headers, with scalars limited to strings, integers, bools and arrays
+//! of those. Replacing the `toml` crate with the full spec would be far
+//! more code than this project needs; this covers exactly the syntax
+//! `Config::from_toml` has ever been asked to parse (see
+//! `crates/noxis-core/src/config/from_toml.rs` for the struct-population
+//! side), erroring out loudly on anything else instead of guessing.
+
+use std::collections::BTreeMap;
+use std::fmt;
+
+/// A parsed scalar or compound TOML-subset value.
+#[derive(Debug, Clone, PartialEq)]
+pub enum Value {
+    String(String),
+    Integer(i64),
+    Bool(bool),
+    Array(Vec<Value>),
+    Table(Table),
+}
+
+/// A `[section]` body: key → value, in the order keys were written.
+pub type Table = BTreeMap<String, Value>;
+
+/// A parse failure, with a human-readable message (no line/col tracking -
+/// configs here are short enough that the offending text is enough).
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub struct ParseError(pub String);
+
+impl fmt::Display for ParseError {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        f.write_str(&self.0)
+    }
+}
+
+fn err(msg: impl Into<String>) -> ParseError {
+    ParseError(msg.into())
+}
+
+/// Parse TOML-subset source text into a root [`Table`].
+pub fn parse(text: &str) -> Result<Table, ParseError> {
+    let mut root: Table = Table::new();
+    let mut path: Vec<String> = Vec::new();
+
+    for raw_line in text.lines() {
+        let line = strip_comment(raw_line).trim();
+        if line.is_empty() {
+            continue;
+        }
+        if let Some(header) = line.strip_prefix('[') {
+            let header = header
+                .strip_suffix(']')
+                .ok_or_else(|| err(format!("незакрытый заголовок секции: `{raw_line}`")))?;
+            path = header
+                .split('.')
+                .map(|seg| seg.trim().to_string())
+                .collect();
+            if path.iter().any(|seg| seg.is_empty()) {
+                return Err(err(format!("пустой сегмент в заголовке: `{raw_line}`")));
+            }
+            ensure_table_path(&mut root, &path)?;
+            continue;
+        }
+        let eq = find_top_level_eq(line)
+            .ok_or_else(|| err(format!("ожидалось `key = value`: `{raw_line}`")))?;
+        let key = line[..eq].trim();
+        if key.is_empty() {
+            return Err(err(format!("пустой ключ: `{raw_line}`")));
+        }
+        let value = parse_value(line[eq + 1..].trim())?;
+        let table = table_at_path(&mut root, &path)?;
+        table.insert(key.to_string(), value);
+    }
+
+    Ok(root)
+}
+
+/// Drop a `#`-started comment, unless the `#` is inside a quoted string.
+fn strip_comment(line: &str) -> &str {
+    let mut in_string = false;
+    for (i, c) in line.char_indices() {
+        match c {
+            '"' => in_string = !in_string,
+            '#' if !in_string => return &line[..i],
+            _ => {}
+        }
+    }
+    line
+}
+
+/// Find the first `=` that isn't inside a quoted string.
+fn find_top_level_eq(line: &str) -> Option<usize> {
+    let mut in_string = false;
+    for (i, c) in line.char_indices() {
+        match c {
+            '"' => in_string = !in_string,
+            '=' if !in_string => return Some(i),
+            _ => {}
+        }
+    }
+    None
+}
+
+fn ensure_table_path(root: &mut Table, path: &[String]) -> Result<(), ParseError> {
+    let mut cur = root;
+    for seg in path {
+        let entry = cur
+            .entry(seg.clone())
+            .or_insert_with(|| Value::Table(Table::new()));
+        match entry {
+            Value::Table(t) => cur = t,
+            _ => return Err(err(format!("`{seg}` уже используется как не-секция"))),
+        }
+    }
+    Ok(())
+}
+
+fn table_at_path<'a>(root: &'a mut Table, path: &[String]) -> Result<&'a mut Table, ParseError> {
+    let mut cur = root;
+    for seg in path {
+        match cur.get_mut(seg.as_str()) {
+            Some(Value::Table(t)) => cur = t,
+            _ => return Err(err(format!("секция `{seg}` не найдена"))),
+        }
+    }
+    Ok(cur)
+}
+
+fn parse_value(s: &str) -> Result<Value, ParseError> {
+    let s = s.trim();
+    if let Some(inner) = s.strip_prefix('"') {
+        let inner = inner
+            .strip_suffix('"')
+            .ok_or_else(|| err(format!("незакрытая строка: `{s}`")))?;
+        return Ok(Value::String(unescape(inner)?));
+    }
+    if let Some(inner) = s.strip_prefix('[') {
+        let inner = inner
+            .strip_suffix(']')
+            .ok_or_else(|| err(format!("незакрытый массив: `{s}`")))?;
+        return Ok(Value::Array(parse_array_elements(inner)?));
+    }
+    match s {
+        "true" => return Ok(Value::Bool(true)),
+        "false" => return Ok(Value::Bool(false)),
+        _ => {}
+    }
+    s.parse::<i64>()
+        .map(Value::Integer)
+        .map_err(|_| err(format!("неподдерживаемое значение: `{s}`")))
+}
+
+fn parse_array_elements(inner: &str) -> Result<Vec<Value>, ParseError> {
+    let mut out = Vec::new();
+    let mut depth = 0i32;
+    let mut in_string = false;
+    let mut start = 0usize;
+    let bytes = inner.as_bytes();
+    let push = |out: &mut Vec<Value>, chunk: &str| -> Result<(), ParseError> {
+        let chunk = chunk.trim();
+        if chunk.is_empty() {
+            return Ok(());
+        }
+        out.push(parse_value(chunk)?);
+        Ok(())
+    };
+    for (i, c) in inner.char_indices() {
+        match c {
+            '"' => in_string = !in_string,
+            '[' if !in_string => depth += 1,
+            ']' if !in_string => depth -= 1,
+            ',' if !in_string && depth == 0 => {
+                push(&mut out, &inner[start..i])?;
+                start = i + 1;
+            }
+            _ => {}
+        }
+    }
+    if start < bytes.len() {
+        push(&mut out, &inner[start..])?;
+    }
+    Ok(out)
+}
+
+/// Basic escapes actually seen in configs: `\"`, `\\`, `\n`, `\t`.
+fn unescape(s: &str) -> Result<String, ParseError> {
+    if !s.contains('\\') {
+        return Ok(s.to_string());
+    }
+    let mut out = String::with_capacity(s.len());
+    let mut chars = s.chars();
+    while let Some(c) = chars.next() {
+        if c != '\\' {
+            out.push(c);
+            continue;
+        }
+        match chars.next() {
+            Some('"') => out.push('"'),
+            Some('\\') => out.push('\\'),
+            Some('n') => out.push('\n'),
+            Some('t') => out.push('\t'),
+            other => {
+                return Err(err(format!(
+                    "неподдерживаемый escape-символ: `\\{}`",
+                    other.unwrap_or(' ')
+                )));
+            }
+        }
+    }
+    Ok(out)
+}
+
+#[cfg(test)]
+mod tests;

crates/noxis-core/src/config/toml_lite/tests.rs

@@ -0,0 +1,83 @@
+//! Tests for the TOML-subset parser.
+#![allow(clippy::expect_used, clippy::unwrap_used)]
+use super::*;
+
+#[test]
+fn parses_flat_pairs() {
+    let t = parse("name = \"x\"\ncount = 4\nflag = true\n").unwrap();
+    assert_eq!(t.get("name"), Some(&Value::String("x".into())));
+    assert_eq!(t.get("count"), Some(&Value::Integer(4)));
+    assert_eq!(t.get("flag"), Some(&Value::Bool(true)));
+}
+
+#[test]
+fn parses_negative_integer() {
+    let t = parse("x = -12").unwrap();
+    assert_eq!(t.get("x"), Some(&Value::Integer(-12)));
+}
+
+#[test]
+fn parses_section_header() {
+    let t = parse("[rename]\npackage_pool = 4\n").unwrap();
+    let Some(Value::Table(section)) = t.get("rename") else {
+        panic!("expected table");
+    };
+    assert_eq!(section.get("package_pool"), Some(&Value::Integer(4)));
+}
+
+#[test]
+fn parses_nested_section_header() {
+    let t = parse("[a.b]\nx = 1\n").unwrap();
+    let Some(Value::Table(a)) = t.get("a") else {
+        panic!("expected table a")
+    };
+    let Some(Value::Table(b)) = a.get("b") else {
+        panic!("expected table b")
+    };
+    assert_eq!(b.get("x"), Some(&Value::Integer(1)));
+}
+
+#[test]
+fn parses_string_array() {
+    let t = parse(r#"keep = ["com/example/Main", "*Service"]"#).unwrap();
+    assert_eq!(
+        t.get("keep"),
+        Some(&Value::Array(vec![
+            Value::String("com/example/Main".into()),
+            Value::String("*Service".into()),
+        ]))
+    );
+}
+
+#[test]
+fn parses_empty_array() {
+    let t = parse("keep = []").unwrap();
+    assert_eq!(t.get("keep"), Some(&Value::Array(vec![])));
+}
+
+#[test]
+fn skips_comments_and_blank_lines() {
+    let t = parse("# comment\n\nx = 1 # trailing\n").unwrap();
+    assert_eq!(t.get("x"), Some(&Value::Integer(1)));
+}
+
+#[test]
+fn hash_inside_string_is_not_a_comment() {
+    let t = parse(r#"x = "a#b""#).unwrap();
+    assert_eq!(t.get("x"), Some(&Value::String("a#b".into())));
+}
+
+#[test]
+fn rejects_float() {
+    assert!(parse("x = 1.5").is_err());
+}
+
+#[test]
+fn rejects_garbage_line() {
+    assert!(parse("not a key value line").is_err());
+}
+
+#[test]
+fn rejects_unterminated_string() {
+    assert!(parse("x = \"unterminated").is_err());
+}