rong 0.2.0

RongJS runtime and embedding API
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
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273

use rong_test::*;

use std::string::String;

#[test]
fn test_convert() {
    run(|ctx| {
        let jsvalue = JSValue::from(ctx, false);
        assert!(jsvalue.is_boolean());
        assert!(!jsvalue.try_into::<bool>().unwrap());

        let jsvalue = JSValue::from(ctx, i32::MIN);
        assert!(jsvalue.is_number());
        assert_eq!(i32::MIN, jsvalue.try_into::<i32>().unwrap());

        let jsvalue = JSValue::from(ctx, u32::MAX);
        assert_eq!(u32::MAX, jsvalue.try_into::<u32>().unwrap());

        // Test i64: small values should be regular numbers, large values should be BigInt
        let small_i64: i64 = 42;
        let jsvalue = JSValue::from(ctx, small_i64);
        assert!(jsvalue.is_number(), "Small i64 should be a regular number");
        assert_eq!(small_i64, jsvalue.try_into::<i64>().unwrap());

        let jsvalue = JSValue::from(ctx, i64::MIN);
        assert!(jsvalue.is_bigint(), "i64::MIN should be a BigInt");
        assert_eq!(i64::MIN, jsvalue.try_into::<i64>().unwrap());

        // Test u64: small values should be regular numbers, large values should be BigInt
        let small_u64: u64 = 42;
        let jsvalue = JSValue::from(ctx, small_u64);
        assert!(jsvalue.is_number(), "Small u64 should be a regular number");
        assert_eq!(small_u64, jsvalue.try_into::<u64>().unwrap());

        let jsvalue = JSValue::from(ctx, u64::MAX);
        assert!(jsvalue.is_bigint(), "u64::MAX should be a BigInt");
        assert_eq!(u64::MAX, jsvalue.try_into::<u64>().unwrap());

        // Test JavaScript safe integer boundary (2^53 - 1)
        let safe_max: i64 = (1i64 << 53) - 1;
        let jsvalue = JSValue::from(ctx, safe_max);
        assert!(
            jsvalue.is_number(),
            "JS safe max should be a regular number"
        );
        assert_eq!(safe_max, jsvalue.try_into::<i64>().unwrap());

        let unsafe_max: i64 = 1i64 << 53;
        let jsvalue = JSValue::from(ctx, unsafe_max);
        assert!(jsvalue.is_bigint(), "Beyond JS safe max should be a BigInt");
        assert_eq!(unsafe_max, jsvalue.try_into::<i64>().unwrap());

        // Test conversion from JS number and BigInt
        let js_num: JSValue = ctx.eval(Source::from_bytes("42")).unwrap();
        assert_eq!(42i64, js_num.try_into::<i64>().unwrap());

        let js_bigint: JSValue = ctx.eval(Source::from_bytes("9007199254740992n")).unwrap();
        assert_eq!(1i64 << 53, js_bigint.try_into::<i64>().unwrap());

        let jsvalue = JSValue::from(ctx, f64::MIN);
        assert_eq!(f64::MIN, jsvalue.try_into::<f64>().unwrap());

        let hello = "Hello";
        let jsvalue = JSValue::from(ctx, hello);
        assert!(jsvalue.is_string());
        let output: String = jsvalue.try_into().unwrap();
        assert_eq!(String::from(hello), output);

        let jsvalue = JSValue::undefined(ctx);
        assert!(jsvalue.is_undefined());

        // Test usize conversion: small values should be regular numbers
        let test_usize: usize = 42;
        let jsvalue = JSValue::from(ctx, test_usize);
        assert!(
            jsvalue.is_number(),
            "Small usize should be a regular number"
        );
        let output: usize = jsvalue.try_into().unwrap();
        assert_eq!(test_usize, output);

        // Test large usize conversion: large values should be BigInt
        let large_usize: usize = usize::MAX;
        let jsvalue = JSValue::from(ctx, large_usize);
        assert!(jsvalue.is_bigint(), "Large usize should be a BigInt");
        let output: usize = jsvalue.try_into().unwrap();
        assert_eq!(large_usize, output);

        Ok(())
    });
}

#[test]
fn test_convert_from_js() {
    run(|ctx| {
        let result: u64 = ctx.eval(Source::from_bytes(b"16"))?;
        assert_eq!(16, result);

        let result: u32 = ctx.eval(Source::from_bytes(b"16"))?;
        assert_eq!(16, result);

        let result: i32 = ctx.eval(Source::from_bytes(b"-16"))?;
        assert_eq!(-16, result);

        let result: i64 = ctx.eval(Source::from_bytes(b"-16"))?;
        assert_eq!(-16, result);

        let result: f64 = ctx.eval(Source::from_bytes(b"-0.89"))?;
        assert_eq!(-0.89, result);

        let result = ctx.eval::<i32>(Source::from_bytes(b"null"));
        assert!(result.is_err());
        let result = ctx.eval::<i64>(Source::from_bytes(b"null"));
        assert!(result.is_err());
        let result = ctx.eval::<u32>(Source::from_bytes(b"string"));
        assert!(result.is_err());
        let result = ctx.eval::<u64>(Source::from_bytes(b"undefined"));
        assert!(result.is_err());
        let result = ctx.eval::<f64>(Source::from_bytes(b"undefined"));
        assert!(result.is_err());

        Ok(())
    });
}

#[cfg(feature = "jscore")]
#[test]
fn test_jscore_i32_u32_conversion_semantics() {
    run(|ctx| {
        // JS ToInt32 semantics (wrap modulo 2^32, then signed).
        let i32_over_max: i32 = ctx.eval(Source::from_bytes(b"2147483648"))?;
        assert_eq!(i32::MIN, i32_over_max);

        let i32_mod_zero: i32 = ctx.eval(Source::from_bytes(b"4294967296"))?;
        assert_eq!(0, i32_mod_zero);

        let i32_nan: i32 = ctx.eval(Source::from_bytes(b"NaN"))?;
        assert_eq!(0, i32_nan);

        // JS ToUint32 semantics (wrap modulo 2^32).
        let u32_neg_one: u32 = ctx.eval(Source::from_bytes(b"-1"))?;
        assert_eq!(u32::MAX, u32_neg_one);

        let u32_over_mod: u32 = ctx.eval(Source::from_bytes(b"4294967297"))?;
        assert_eq!(1, u32_over_mod);

        let u32_nan: u32 = ctx.eval(Source::from_bytes(b"NaN"))?;
        assert_eq!(0, u32_nan);

        Ok(())
    });
}

#[test]
fn test_equal() {
    run(|ctx| {
        let boolean = JSValue::from(ctx, false);
        let integer = JSValue::from(ctx, i32::MAX);
        let integer2 = JSValue::from(ctx, i32::MAX);
        assert!(boolean != integer);
        assert!(integer == integer.clone());
        assert!(integer == integer2);
        Ok(())
    });
}

#[test]
fn test_display() {
    run(|ctx| {
        // Test undefined
        let jsvalue = JSValue::undefined(ctx);
        assert_eq!(format!("{}", jsvalue), "undefined");

        // Test boolean
        let jsvalue = JSValue::from(ctx, true);
        assert_eq!(format!("{}", jsvalue), "true");

        // Test number
        let jsvalue = JSValue::from(ctx, 42);
        assert_eq!(format!("{}", jsvalue), "42");

        // Test string
        let jsvalue = JSValue::from(ctx, "hello");
        assert_eq!(format!("{}", jsvalue), "hello");

        // Test object
        let code = "({foo: 'bar'})";
        let jsvalue: JSValue = ctx.eval(Source::from_bytes(code)).unwrap();
        assert_eq!(format!("{}", jsvalue), "object");

        // Test array
        let code = "[1, 2, 3]";
        let jsvalue: JSValue = ctx.eval(Source::from_bytes(code)).unwrap();
        assert_eq!(format!("{}", jsvalue), "array");

        // Test function
        let code = "(function name() {})";
        let jsvalue: JSValue = ctx.eval(Source::from_bytes(code)).unwrap();
        assert_eq!(format!("{}", jsvalue), "function");

        // Test promise
        let code = "new Promise(() => {})";
        let jsvalue: JSValue = ctx.eval(Source::from_bytes(code)).unwrap();
        assert_eq!(format!("{}", jsvalue), "promise");

        // Test null
        let code = "null";
        let jsvalue: JSValue = ctx.eval(Source::from_bytes(code)).unwrap();
        assert_eq!(format!("{}", jsvalue), "null");
        Ok(())
    });
}

#[test]
fn test_string_with_null() {
    run(|ctx| {
        // Test string containing null character
        let result: String = ctx
            .eval(Source::from_bytes(
                br#"
                "before" + String.fromCharCode(0) + "after"
                "#,
            ))
            .unwrap();

        // In JavaScript, the string is: "before\0after"
        // "before" (6 chars) + "\0" (1 char) + "after" (5 chars) = 12 total
        assert_eq!(result.len(), 12, "String length should be 12 (6 + 1 + 5)");

        // Verify the string contains the null character
        assert!(
            result.contains('\0'),
            "String should contain null character"
        );

        // Verify content before and after null character
        let parts: Vec<&str> = result.split('\0').collect();
        assert_eq!(parts[0], "before", "Content before null character");
        assert_eq!(parts[1], "after", "Content after null character");

        // Test empty string with only null character
        let result: String = ctx
            .eval(Source::from_bytes(
                br#"
                String.fromCharCode(0)
                "#,
            ))
            .unwrap();
        assert_eq!(
            result.len(),
            1,
            "Single null character string length should be 1"
        );
        assert_eq!(result.as_bytes(), &[0], "Should be a single null byte");

        // Test string with multiple null characters
        let result: String = ctx
            .eval(Source::from_bytes(
                br#"
                "a" + String.fromCharCode(0) + "b" + String.fromCharCode(0) + "c"
                "#,
            ))
            .unwrap();
        assert_eq!(
            result.len(),
            5,
            "String length should be 5 (a + \0 + b + \0 + c)"
        );
        let parts: Vec<&str> = result.split('\0').collect();
        assert_eq!(parts, &["a", "b", "c"], "Should split into three parts");
        Ok(())
    });
}