ruchy 4.1.1

A systems scripting language that transpiles to idiomatic Rust with extreme quality engineering
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248

//! PARSER-093: Module declaration support (Issue #137 - ruchy-lambda)
//!
//! BUG: Parser creates `ModuleDeclaration` AST nodes, but transpiler doesn't support them.
//! ERROR: "Unsupported expression kind: `ModuleDeclaration` { name: \"`http_client`\" }"
//!
//! IMPACT: Cannot compose Ruchy code with external Rust modules, forces all-or-nothing approach.
//!
//! EXTREME TDD: RED → GREEN → REFACTOR → VALIDATE

#![allow(clippy::expect_used)]
#![allow(clippy::unwrap_used)]

use ruchy::{Parser, Transpiler};

/// Test 1: Simple external module declaration
/// Example: `mod http_client;`
/// Should transpile to: `mod http_client;`
#[test]
#[ignore = "Module resolution requires actual module files - tests use mock declarations"]
fn test_parser_093_01_simple_mod_declaration() {
    let code = "mod http_client;";

    let ast = Parser::new(code).parse().expect("Parse should succeed");
    let result = Transpiler::new().transpile(&ast);

    assert!(
        result.is_ok(),
        "Should successfully transpile mod declaration, got: {:?}",
        result.err()
    );

    let rust_code = result.unwrap().to_string();
    assert!(
        rust_code.contains("mod http_client"),
        "Should contain mod declaration, got: {rust_code}"
    );
}

/// Test 2: Public module declaration
/// Example: `pub mod http_client;`
/// Should transpile to: `pub mod http_client;`
#[test]
#[ignore = "Module resolution requires actual module files - tests use mock declarations"]
fn test_parser_093_02_public_mod_declaration() {
    let code = "pub mod http_client;";

    let ast = Parser::new(code).parse().expect("Parse should succeed");
    let result = Transpiler::new().transpile(&ast);

    assert!(
        result.is_ok(),
        "Should successfully transpile pub mod, got: {:?}",
        result.err()
    );

    let rust_code = result.unwrap().to_string();
    assert!(
        rust_code.contains("pub mod http_client"),
        "Should contain pub mod, got: {rust_code}"
    );
}

/// Test 3: Multiple module declarations
/// Should handle multiple mod statements
#[test]
#[ignore = "Module resolution requires actual module files - tests use mock declarations"]
fn test_parser_093_03_multiple_mod_declarations() {
    let code = r"
mod http_client;
mod websocket;
mod tls;
";

    let ast = Parser::new(code).parse().expect("Parse should succeed");
    let result = Transpiler::new().transpile(&ast);

    assert!(
        result.is_ok(),
        "Should transpile multiple mods, got: {:?}",
        result.err()
    );

    let rust_code = result.unwrap().to_string();
    assert!(
        rust_code.contains("mod http_client"),
        "Should have http_client mod"
    );
    assert!(
        rust_code.contains("mod websocket"),
        "Should have websocket mod"
    );
    assert!(rust_code.contains("mod tls"), "Should have tls mod");
}

/// Test 4: Module declaration with struct after
/// Verifies mod doesn't break subsequent code
#[test]
#[ignore = "Module resolution requires actual module files - tests use mock declarations"]
fn test_parser_093_04_mod_with_struct() {
    let code = r"
mod http_client;

pub struct Runtime {
    endpoint: String,
}
";

    let ast = Parser::new(code).parse().expect("Parse should succeed");
    let result = Transpiler::new().transpile(&ast);

    assert!(
        result.is_ok(),
        "Should transpile mod + struct, got: {:?}",
        result.err()
    );

    let rust_code = result.unwrap().to_string();
    assert!(rust_code.contains("mod http_client"), "Should have mod");
    assert!(
        rust_code.contains("struct Runtime"),
        "Should have struct after mod"
    );
}

/// Test 5: Module with use statement after
/// Verifies mod works with import statements
#[test]
#[ignore = "Module resolution requires actual module files - tests use mock declarations"]
fn test_parser_093_05_mod_with_use() {
    let code = r"
mod http_client;
use std::io::Read;
";

    let ast = Parser::new(code).parse().expect("Parse should succeed");
    let result = Transpiler::new().transpile(&ast);

    assert!(
        result.is_ok(),
        "Should transpile mod + use, got: {:?}",
        result.err()
    );

    let rust_code = result.unwrap().to_string();
    assert!(rust_code.contains("mod http_client"), "Should have mod");
    assert!(
        rust_code.contains("use std :: io :: Read"),
        "Should have use"
    );
}

/// Test 6: pub(crate) module declaration
/// Restricted visibility modifier
#[test]
#[ignore = "Module resolution requires actual module files - tests use mock declarations"]
fn test_parser_093_06_pub_crate_mod() {
    let code = "pub(crate) mod internal;";

    let ast = Parser::new(code).parse().expect("Parse should succeed");
    let result = Transpiler::new().transpile(&ast);

    assert!(
        result.is_ok(),
        "Should transpile pub(crate) mod, got: {:?}",
        result.err()
    );

    let rust_code = result.unwrap().to_string();
    assert!(
        rust_code.contains("pub (crate) mod internal")
            || rust_code.contains("pub(crate) mod internal"),
        "Should have pub(crate) mod, got: {rust_code}"
    );
}

/// Test 7: Issue #137 reproduction - ruchy-lambda use case
/// Actual code pattern from ruchy-lambda project
#[test]
#[ignore = "Module resolution requires actual module files - tests use mock declarations"]
fn test_parser_093_07_issue_137_repro() {
    let code = r#"
mod http_client;

pub struct LambdaRuntime {
    endpoint: String,
}

impl LambdaRuntime {
    pub fn new(endpoint: String) -> Self {
        LambdaRuntime { endpoint }
    }

    pub fn invoke(&self) -> bool {
        let result = http_client::http_get(&self.endpoint, "/health");
        result
    }
}
"#;

    let ast = Parser::new(code).parse().expect("Parse should succeed");
    let result = Transpiler::new().transpile(&ast);

    assert!(
        result.is_ok(),
        "Issue #137 pattern should work, got: {:?}",
        result.err()
    );

    let rust_code = result.unwrap().to_string();
    assert!(rust_code.contains("mod http_client"), "Should have mod");
    assert!(
        rust_code.contains("struct LambdaRuntime"),
        "Should have struct"
    );
    assert!(
        rust_code.contains("http_client :: http_get"),
        "Should preserve :: in module call (PARSER-094)"
    );
}

/// Test 8: Inline module (mod foo { ... })
/// Tests inline module blocks (if supported)
#[test]
#[ignore = "Inline modules may not be supported yet"]
fn test_parser_093_08_inline_module() {
    let code = r"
mod utils {
    pub fn helper() -> i32 {
        42
    }
}

let x = utils::helper();
";

    let ast = Parser::new(code).parse().expect("Parse should succeed");
    let result = Transpiler::new().transpile(&ast);

    assert!(
        result.is_ok(),
        "Should transpile inline module, got: {:?}",
        result.err()
    );

    let rust_code = result.unwrap().to_string();
    assert!(rust_code.contains("mod utils"), "Should have mod utils");
    assert!(rust_code.contains("fn helper"), "Should have function");
}