compiletest/runtest/
ui.rs

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
use std::collections::HashSet;
use std::fs::OpenOptions;
use std::io::Write;

use rustfix::{Filter, apply_suggestions, get_suggestions_from_json};
use tracing::debug;

use super::{
    AllowUnused, Emit, ErrorKind, FailMode, LinkToAux, PassMode, TargetLocation, TestCx,
    TestOutput, Truncated, UI_FIXED, WillExecute,
};
use crate::{errors, json};

impl TestCx<'_> {
    pub(super) fn run_ui_test(&self) {
        if let Some(FailMode::Build) = self.props.fail_mode {
            // Make sure a build-fail test cannot fail due to failing analysis (e.g. typeck).
            let pm = Some(PassMode::Check);
            let proc_res =
                self.compile_test_general(WillExecute::No, Emit::Metadata, pm, Vec::new());
            self.check_if_test_should_compile(self.props.fail_mode, pm, &proc_res);
        }

        let pm = self.pass_mode();
        let should_run = self.should_run(pm);
        let emit_metadata = self.should_emit_metadata(pm);
        let proc_res = self.compile_test(should_run, emit_metadata);
        self.check_if_test_should_compile(self.props.fail_mode, pm, &proc_res);
        if matches!(proc_res.truncated, Truncated::Yes)
            && !self.props.dont_check_compiler_stdout
            && !self.props.dont_check_compiler_stderr
        {
            self.fatal_proc_rec(
                "compiler output got truncated, cannot compare with reference file",
                &proc_res,
            );
        }

        // if the user specified a format in the ui test
        // print the output to the stderr file, otherwise extract
        // the rendered error messages from json and print them
        let explicit = self.props.compile_flags.iter().any(|s| s.contains("--error-format"));

        let expected_fixed = self.load_expected_output(UI_FIXED);

        self.check_and_prune_duplicate_outputs(&proc_res, &[], &[]);

        let mut errors = self.load_compare_outputs(&proc_res, TestOutput::Compile, explicit);
        let rustfix_input = json::rustfix_diagnostics_only(&proc_res.stderr);

        if self.config.compare_mode.is_some() {
            // don't test rustfix with nll right now
        } else if self.config.rustfix_coverage {
            // Find out which tests have `MachineApplicable` suggestions but are missing
            // `run-rustfix` or `run-rustfix-only-machine-applicable` headers.
            //
            // This will return an empty `Vec` in case the executed test file has a
            // `compile-flags: --error-format=xxxx` header with a value other than `json`.
            let suggestions = get_suggestions_from_json(
                &rustfix_input,
                &HashSet::new(),
                Filter::MachineApplicableOnly,
            )
            .unwrap_or_default();
            if !suggestions.is_empty()
                && !self.props.run_rustfix
                && !self.props.rustfix_only_machine_applicable
            {
                let mut coverage_file_path = self.config.build_base.clone();
                coverage_file_path.push("rustfix_missing_coverage.txt");
                debug!("coverage_file_path: {}", coverage_file_path.display());

                let mut file = OpenOptions::new()
                    .create(true)
                    .append(true)
                    .open(coverage_file_path.as_path())
                    .expect("could not create or open file");

                if let Err(e) = writeln!(file, "{}", self.testpaths.file.display()) {
                    panic!("couldn't write to {}: {e:?}", coverage_file_path.display());
                }
            }
        } else if self.props.run_rustfix {
            // Apply suggestions from rustc to the code itself
            let unfixed_code = self.load_expected_output_from_path(&self.testpaths.file).unwrap();
            let suggestions = get_suggestions_from_json(
                &rustfix_input,
                &HashSet::new(),
                if self.props.rustfix_only_machine_applicable {
                    Filter::MachineApplicableOnly
                } else {
                    Filter::Everything
                },
            )
            .unwrap();
            let fixed_code = apply_suggestions(&unfixed_code, &suggestions).unwrap_or_else(|e| {
                panic!(
                    "failed to apply suggestions for {:?} with rustfix: {}",
                    self.testpaths.file, e
                )
            });

            errors += self.compare_output("fixed", &fixed_code, &expected_fixed);
        } else if !expected_fixed.is_empty() {
            panic!(
                "the `//@ run-rustfix` directive wasn't found but a `*.fixed` \
                 file was found"
            );
        }

        if errors > 0 {
            println!("To update references, rerun the tests and pass the `--bless` flag");
            let relative_path_to_file =
                self.testpaths.relative_dir.join(self.testpaths.file.file_name().unwrap());
            println!(
                "To only update this specific test, also pass `--test-args {}`",
                relative_path_to_file.display(),
            );
            self.fatal_proc_rec(
                &format!("{} errors occurred comparing output.", errors),
                &proc_res,
            );
        }

        let expected_errors = errors::load_errors(&self.testpaths.file, self.revision);

        if let WillExecute::Yes = should_run {
            let proc_res = self.exec_compiled_test();
            let run_output_errors = if self.props.check_run_results {
                self.load_compare_outputs(&proc_res, TestOutput::Run, explicit)
            } else {
                0
            };
            if run_output_errors > 0 {
                self.fatal_proc_rec(
                    &format!("{} errors occurred comparing run output.", run_output_errors),
                    &proc_res,
                );
            }
            if self.should_run_successfully(pm) {
                if !proc_res.status.success() {
                    self.fatal_proc_rec("test run failed!", &proc_res);
                }
            } else if proc_res.status.success() {
                self.fatal_proc_rec("test run succeeded!", &proc_res);
            }

            if !self.props.error_patterns.is_empty() || !self.props.regex_error_patterns.is_empty()
            {
                // "// error-pattern" comments
                let output_to_check = self.get_output(&proc_res);
                self.check_all_error_patterns(&output_to_check, &proc_res, pm);
            }
        }

        debug!(
            "run_ui_test: explicit={:?} config.compare_mode={:?} expected_errors={:?} \
               proc_res.status={:?} props.error_patterns={:?}",
            explicit,
            self.config.compare_mode,
            expected_errors,
            proc_res.status,
            self.props.error_patterns
        );

        let check_patterns = should_run == WillExecute::No
            && (!self.props.error_patterns.is_empty()
                || !self.props.regex_error_patterns.is_empty());
        if !explicit && self.config.compare_mode.is_none() {
            let check_annotations = !check_patterns || !expected_errors.is_empty();

            if check_annotations {
                // "//~ERROR comments"
                self.check_expected_errors(expected_errors, &proc_res);
            }
        } else if explicit && !expected_errors.is_empty() {
            let msg = format!(
                "line {}: cannot combine `--error-format` with {} annotations; use `error-pattern` instead",
                expected_errors[0].line_num,
                expected_errors[0].kind.unwrap_or(ErrorKind::Error),
            );
            self.fatal(&msg);
        }
        if check_patterns {
            // "// error-pattern" comments
            let output_to_check = self.get_output(&proc_res);
            self.check_all_error_patterns(&output_to_check, &proc_res, pm);
        }

        if self.props.run_rustfix && self.config.compare_mode.is_none() {
            // And finally, compile the fixed code and make sure it both
            // succeeds and has no diagnostics.
            let mut rustc = self.make_compile_args(
                &self.expected_output_path(UI_FIXED),
                TargetLocation::ThisFile(self.make_exe_name()),
                emit_metadata,
                AllowUnused::No,
                LinkToAux::Yes,
                Vec::new(),
            );

            // If a test is revisioned, it's fixed source file can be named "a.foo.fixed", which,
            // well, "a.foo" isn't a valid crate name. So we explicitly mangle the test name
            // (including the revision) here to avoid the test writer having to manually specify a
            // `#![crate_name = "..."]` as a workaround. This is okay since we're only checking if
            // the fixed code is compilable.
            if self.revision.is_some() {
                let crate_name =
                    self.testpaths.file.file_stem().expect("test must have a file stem");
                // crate name must be alphanumeric or `_`.
                let crate_name =
                    crate_name.to_str().expect("crate name implies file name must be valid UTF-8");
                // replace `a.foo` -> `a__foo` for crate name purposes.
                // replace `revision-name-with-dashes` -> `revision_name_with_underscore`
                let crate_name = crate_name.replace('.', "__");
                let crate_name = crate_name.replace('-', "_");
                rustc.arg("--crate-name");
                rustc.arg(crate_name);
            }

            let res = self.compose_and_run_compiler(rustc, None, self.testpaths);
            if !res.status.success() {
                self.fatal_proc_rec("failed to compile fixed code", &res);
            }
            if !res.stderr.is_empty()
                && !self.props.rustfix_only_machine_applicable
                && !json::rustfix_diagnostics_only(&res.stderr).is_empty()
            {
                self.fatal_proc_rec("fixed code is still producing diagnostics", &res);
            }
        }
    }
}