wstp 0.6.0

Bindings to the Wolfram Symbolic Transfer Protocol (WSTP)
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

use wolfram_expr::{expr, Expr};
use wstp::{sys, Link, LinkStr, Protocol, Token, TokenType};

fn check_loopback_roundtrip(expr: Expr) {
    let mut link = Link::new_loopback().expect("failed to create Loopback link");

    link.put_expr(&expr).expect("failed to write expr");

    let read = link.get_expr().expect("failed to read expr");

    assert_eq!(expr, read);
}

#[test]
fn test_loopback_link() {
    check_loopback_roundtrip(Expr::from(5i64));
    check_loopback_roundtrip(expr!(System::List[1]));
    check_loopback_roundtrip(expr!(Global::MyHead[1i16]));
}

#[test]
fn test_loopback_get_put_atoms() {
    let mut link = Link::new_loopback().expect("failed to create Loopback link");

    {
        // Test the `Link::get_string_ref()` method.
        link.put_expr(&Expr::string("Hello!")).unwrap();
        let link_str: LinkStr = link.get_string_ref().unwrap();
        assert_eq!(link_str.as_str(), "Hello!")
    }

    {
        // Test the `Link::get_symbol_ref()` method.
        link.put_expr(&expr!(System::Plot)).unwrap();
        let link_str: LinkStr = link.get_symbol_ref().unwrap();
        assert_eq!(link_str.as_str(), "System`Plot")
    }
}

#[test]
fn test_is_loopback() {
    let link = Link::new_loopback().unwrap();
    assert!(link.is_loopback());

    let link = Link::listen(Protocol::IntraProcess, "name-test").unwrap();
    assert!(!link.is_loopback());
}

#[test]
fn test_loopback_idempotence_of_get_arg_count() {
    let mut link = Link::new_loopback().unwrap();

    link.put_function("List", 1).unwrap();
    link.put_i64(10).unwrap();

    assert_eq!(link.raw_get_next(), Ok(sys::WSTKFUNC.into()));

    // Test that it doesn't matter how many times we call WSArgCount().
    for _ in 0..5 {
        assert_eq!(link.get_arg_count(), Ok(1));
    }

    assert_eq!(
        link.get_string_ref().map(|s| s.as_str().to_owned()),
        Ok(String::from("List"))
    );
}

#[test]
fn test_get_arg_count_must_be_called_at_least_once() {
    let mut link = Link::new_loopback().unwrap();

    link.put_function("List", 1).unwrap();
    link.put_i64(10).unwrap();

    assert_eq!(link.raw_get_next(), Ok(sys::WSTKFUNC.into()));

    // This call is required for this code to be correct:
    //   assert_eq!(link.get_arg_count(), Ok(1));

    // Expect that trying to get the head fails. Even though we know what the arg count
    // should be, we're still required to query it using WSArgCount().
    assert_eq!(
        link.get_string_ref().unwrap_err().code(),
        Some(sys::WSEGSEQ)
    );
}

#[test]
fn test_loopback_basic_put_and_get_list() {
    let mut link = Link::new_loopback().unwrap();

    link.put_function("List", 1).unwrap();
    link.put_i64(10).unwrap();

    assert_eq!(link.raw_get_next(), Ok(sys::WSTKFUNC.into()));
    assert_eq!(link.get_arg_count(), Ok(1));
    assert_eq!(
        link.get_string_ref().map(|s| s.as_str().to_owned()),
        Ok(String::from("List"))
    );
    assert_eq!(link.get_i64(), Ok(10));
}

#[test]
fn test_loopback_get_next() {
    let mut link = Link::new_loopback().unwrap();

    link.put_function("List", 1).unwrap();
    link.put_i64(10).unwrap();

    assert!(link.is_ready());

    assert_eq!(link.raw_get_next(), Ok(sys::WSTKFUNC.into()));
    assert_eq!(link.raw_get_next(), Ok(sys::WSTKSYM.into()));
    assert_eq!(link.raw_get_next(), Ok(sys::WSTKINT.into()));

    assert_eq!(link.raw_get_next().unwrap_err().code(), Some(sys::WSEABORT));

    assert!(!link.is_ready());
}

#[test]
fn test_loopback_new_packet() {
    let mut link = Link::new_loopback().unwrap();

    link.put_function("List", 1).unwrap();
    link.put_i64(10).unwrap();

    assert!(link.is_ready());

    assert_eq!(link.raw_get_next(), Ok(sys::WSTKFUNC.into()));
    assert_eq!(link.new_packet(), Ok(()));

    assert_eq!(link.raw_get_next().unwrap_err().code(), Some(sys::WSEABORT));

    assert!(!link.is_ready());
}

#[test]
fn test_loopback_test_head() {
    let mut link = Link::new_loopback().unwrap();

    link.put_function("List", 1).unwrap();
    link.put_i64(10).unwrap();

    assert_eq!(link.test_head("List"), Ok(1));
}

#[test]
fn test_loopback_test_head_error() {
    let mut link = Link::new_loopback().unwrap();

    link.put_function("List", 1).unwrap();
    link.put_i64(10).unwrap();

    assert_eq!(
        link.test_head("Plot").unwrap_err().code().unwrap(),
        sys::WSEGSEQ
    );
}

#[test]
fn test_loopback_transfer_simple() {
    let mut link = Link::new_loopback().unwrap();
    link.put_str("hello").unwrap();

    let mut new = Link::new_loopback().unwrap();
    link.transfer_to_end_of_loopback_link(&mut new).unwrap();

    assert_eq!(new.get_string_ref().unwrap().as_str(), "hello");
}

#[test]
fn test_loopback_transfer_list() {
    let mut link = Link::new_loopback().unwrap();
    link.put_function("System`List", 3).unwrap();
    link.put_i64(5).unwrap();
    link.put_str("second").unwrap();
    link.put_symbol("Global`foo").unwrap();

    let mut new = Link::new_loopback().unwrap();
    link.transfer_to_end_of_loopback_link(&mut new).unwrap();

    assert_eq!(
        new.get_expr().unwrap().to_string(),
        "{5, \"second\", Global`foo}"
    );
}

#[test]
#[rustfmt::skip]
fn test_loopback_get_tokens() {
    // Put {5, "second", foo}
    let mut link = Link::new_loopback().unwrap();
    link.put_function("System`List", 3).unwrap();
    link.put_i64(5).unwrap();
    link.put_str("second").unwrap();
    link.put_symbol("Global`foo").unwrap();

    assert!(matches!(link.get_token().unwrap(), Token::Function { length: 3 }));
    assert!(matches!(link.get_token().unwrap(), Token::Symbol(s) if s.as_str() == "System`List"));
    assert!(matches!(link.get_token().unwrap(), Token::Integer(5)));
    assert!(matches!(link.get_token().unwrap(), Token::String(s) if s.as_str() == "second"));
    assert!(matches!(link.get_token().unwrap(), Token::Symbol(s) if s.as_str() == "Global`foo"));
}

#[test]
#[rustfmt::skip]
fn test_loopback_get_token_type_is_idempotent() {
    // Put {5, "second", foo}
    let mut link = Link::new_loopback().unwrap();
    link.put_function("System`List", 3).unwrap();
    link.put_i64(5).unwrap();
    link.put_str("second").unwrap();
    link.put_symbol("Global`foo").unwrap();

    // Calling get_type(), even multiple times in a row, should not advance the link at
    // all.
    assert_eq!(link.get_type().unwrap(), TokenType::Function);
    assert_eq!(link.get_type().unwrap(), TokenType::Function);
    assert_eq!(link.get_type().unwrap(), TokenType::Function);

    assert!(matches!(link.get_token().unwrap(), Token::Function { length: 3 }));

    assert_eq!(link.get_type().unwrap(), TokenType::Symbol);
    assert_eq!(link.get_type().unwrap(), TokenType::Symbol);
    assert_eq!(link.get_type().unwrap(), TokenType::Symbol);

    assert!(matches!(link.get_token().unwrap(), Token::Symbol(s) if s.as_str() == "System`List"));

    assert_eq!(link.get_type().unwrap(), TokenType::Integer);
    assert_eq!(link.get_type().unwrap(), TokenType::Integer);
    assert_eq!(link.get_type().unwrap(), TokenType::Integer);

    assert!(matches!(link.get_token().unwrap(), Token::Integer(5)));
}