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//! Mutation and editing tests
//!
//! Tests verify:
//! - Simple value replacement (scalars, booleans, numbers)
//! - Nested mapping mutations
//! - Adding new keys to existing mappings
//! - Multiple root-level changes
//! - Preservation of comments and whitespace during mutations
//! - Deep nested structure mutations
//!
//! All tests verify:
//! 1. API correctness - mutations work as expected
//! 2. Lossless editing - formatting and structure preserved
//! 3. Round-trip validity - output can be re-parsed
use std::str::FromStr;
use yaml_edit::YamlFile;
#[test]
fn test_simple_value_replacement() {
let yaml = YamlFile::from_str("key: value").unwrap();
if let Some(doc) = yaml.document() {
if let Some(mapping) = doc.as_mapping() {
mapping.set("key", "new_value");
}
}
assert_eq!(yaml.to_string(), "key: new_value");
// Verify output is valid YAML
let output = yaml.to_string();
let reparsed = YamlFile::from_str(&output).expect("Output should be valid YAML");
assert!(reparsed.document().is_some());
}
#[test]
fn test_value_replacement_preserves_whitespace() {
let yaml = YamlFile::from_str("key: value # comment").unwrap();
if let Some(doc) = yaml.document() {
if let Some(mapping) = doc.as_mapping() {
mapping.set("key", "new_value");
}
}
assert_eq!(yaml.to_string(), "key: new_value # comment");
// Verify output is valid YAML
let output = yaml.to_string();
let reparsed = YamlFile::from_str(&output).expect("Output should be valid YAML");
assert!(reparsed.document().is_some());
}
#[test]
fn test_boolean_value_replacement() {
let yaml = YamlFile::from_str("debug: true # For now").unwrap();
if let Some(doc) = yaml.document() {
if let Some(mapping) = doc.as_mapping() {
mapping.set("debug", false);
}
}
assert_eq!(yaml.to_string(), "debug: false # For now");
// Verify output is valid YAML
let output = yaml.to_string();
let reparsed = YamlFile::from_str(&output).expect("Output should be valid YAML");
assert!(reparsed.document().is_some());
}
#[test]
fn test_nested_mapping_mutation() {
let yaml_str = r#"database:
name: dev_db
user: admin"#;
let yaml = YamlFile::from_str(yaml_str).unwrap();
if let Some(doc) = yaml.document() {
if let Some(mapping) = doc.as_mapping() {
mapping.modify_mapping("database", |db| {
db.set("name", "prod_db");
});
}
}
let expected = r#"database:
name: prod_db
user: admin"#;
assert_eq!(yaml.to_string(), expected);
// Verify output is valid YAML
let output = yaml.to_string();
let reparsed = YamlFile::from_str(&output).expect("Output should be valid YAML");
assert!(reparsed.document().is_some());
}
#[test]
fn test_nested_mapping_add_new_key() {
let yaml_str = r#"database:
name: dev_db
user: admin"#;
let yaml = YamlFile::from_str(yaml_str).unwrap();
if let Some(doc) = yaml.document() {
if let Some(mapping) = doc.as_mapping() {
mapping.modify_mapping("database", |db| {
db.set("password", "secret123");
});
}
}
let expected = r#"database:
name: dev_db
user: admin
password: secret123
"#;
assert_eq!(yaml.to_string(), expected);
// Verify output is valid YAML
let output = yaml.to_string();
let reparsed = YamlFile::from_str(&output).expect("Output should be valid YAML");
assert!(reparsed.document().is_some());
}
#[test]
fn test_multiple_root_level_changes() {
let yaml_str = r#"host: localhost
port: 8080
debug: true"#;
let yaml = YamlFile::from_str(yaml_str).unwrap();
if let Some(doc) = yaml.document() {
if let Some(mapping) = doc.as_mapping() {
mapping.set("host", "0.0.0.0");
mapping.set("port", 3000);
mapping.set("debug", false);
}
}
let expected = r#"host: 0.0.0.0
port: 3000
debug: false"#;
assert_eq!(yaml.to_string(), expected);
// Verify output is valid YAML
let output = yaml.to_string();
let reparsed = YamlFile::from_str(&output).expect("Output should be valid YAML");
assert!(reparsed.document().is_some());
}
#[test]
fn test_add_new_root_key() {
let yaml = YamlFile::from_str("existing: value").unwrap();
if let Some(doc) = yaml.document() {
if let Some(mapping) = doc.as_mapping() {
mapping.set("new_key", "new_value");
}
}
let expected = r#"existing: value
new_key: new_value
"#;
assert_eq!(yaml.to_string(), expected);
// Verify output is valid YAML
let output = yaml.to_string();
let reparsed = YamlFile::from_str(&output).expect("Output should be valid YAML");
assert!(reparsed.document().is_some());
}
#[test]
fn test_nested_with_comments_and_structure() {
let yaml_str = r#"# Config
server:
host: localhost # Default host
port: 8080"#;
let yaml = YamlFile::from_str(yaml_str).unwrap();
if let Some(doc) = yaml.document() {
if let Some(mapping) = doc.as_mapping() {
mapping.modify_mapping("server", |server| {
server.set("host", "0.0.0.0");
server.set("timeout", 30);
});
}
}
let expected = r#"# Config
server:
host: 0.0.0.0 # Default host
port: 8080
timeout: 30
"#;
assert_eq!(yaml.to_string(), expected);
// Verify output is valid YAML
let output = yaml.to_string();
let reparsed = YamlFile::from_str(&output).expect("Output should be valid YAML");
assert!(reparsed.document().is_some());
}
// Tests from nested_mutation_test.rs
#[test]
fn test_nested_mapping_mutations_propagate() {
let original = r#"database:
name: dev_db
user: admin
max_connections: 10"#;
let yaml = YamlFile::from_str(original).unwrap();
if let Some(doc) = yaml.document() {
if let Some(mapping) = doc.as_mapping() {
// Get the nested database mapping and modify it
if let Some(db) = mapping.get_mapping("database") {
db.set("name", "prod_db");
db.set("password", "secret123");
db.set("max_connections", 50);
}
}
}
let expected =
"database:\n name: prod_db\n user: admin\n max_connections: 50\n password: secret123\n";
assert_eq!(yaml.to_string(), expected);
// Verify output is valid YAML
let output = yaml.to_string();
let reparsed = YamlFile::from_str(&output).expect("Output should be valid YAML");
assert!(reparsed.document().is_some());
}
#[test]
fn test_deeply_nested_mutations() {
let original = r#"server:
database:
primary:
host: localhost
port: 5432"#;
let yaml = YamlFile::from_str(original).unwrap();
if let Some(doc) = yaml.document() {
if let Some(root) = doc.as_mapping() {
if let Some(server) = root.get_mapping("server") {
if let Some(db) = server.get_mapping("database") {
if let Some(primary) = db.get_mapping("primary") {
primary.set("host", "prod.example.com");
primary.set("ssl", true);
}
}
}
}
}
let expected = "server:\n database:\n primary:\n host: prod.example.com\n port: 5432\n ssl: true\n";
assert_eq!(yaml.to_string(), expected);
// Verify output is valid YAML
let output = yaml.to_string();
let reparsed = YamlFile::from_str(&output).expect("Output should be valid YAML");
assert!(reparsed.document().is_some());
}
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