strest 0.1.10

Blazing-fast async HTTP load tester in Rust - lock-free design, real-time stats, distributed runs, and optional chart exports for high-load API testing.
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

use std::collections::BTreeMap;

use crate::application::commands::{DistributedRunCommand, LocalRunCommand, ReplayRunCommand};
use crate::args::{
    LoadMode as CliLoadMode, Protocol as CliProtocol, Scenario as CliScenario, TesterArgs,
};
use crate::config::types::ScenarioConfig;
use crate::domain::run::{LoadMode, ProtocolKind, RunConfig, Scenario};
use crate::error::{AppError, AppResult, ValidationError};

pub(crate) fn to_local_run_command(args: &TesterArgs) -> AppResult<LocalRunCommand> {
    if args.url.is_none() && args.scenario.is_none() {
        tracing::error!("Missing URL (set --url or provide in config).");
        return Err(AppError::validation(ValidationError::MissingUrl));
    }
    let run_config = to_run_config(args);
    Ok(LocalRunCommand::new(run_config, args.no_color))
}

pub(crate) fn to_replay_run_command(args: &TesterArgs) -> ReplayRunCommand {
    let run_config = to_run_config(args);
    ReplayRunCommand::new(run_config, args.no_color)
}

pub(crate) fn to_controller_run_command(
    args: &TesterArgs,
    scenarios: Option<BTreeMap<String, ScenarioConfig>>,
) -> DistributedRunCommand {
    let run_config = to_run_config(args);
    DistributedRunCommand::new_controller(run_config, args.no_color, scenarios)
}

pub(crate) fn to_agent_run_command(args: &TesterArgs) -> DistributedRunCommand {
    let run_config = to_run_config(args);
    DistributedRunCommand::new_agent(run_config, args.no_color)
}

fn to_run_config(args: &TesterArgs) -> RunConfig {
    RunConfig {
        protocol: map_protocol(args.protocol),
        load_mode: map_load_mode(args.load_mode),
        target_url: args.url.clone(),
        scenario: args.scenario.as_ref().map(map_scenario),
    }
}

const fn map_protocol(protocol: CliProtocol) -> ProtocolKind {
    protocol.to_domain()
}

const fn map_load_mode(load_mode: CliLoadMode) -> LoadMode {
    load_mode.to_domain()
}

fn map_scenario(scenario: &CliScenario) -> Scenario {
    Scenario {
        base_url: scenario.base_url.clone(),
        vars_count: scenario.vars.len(),
        step_count: scenario.steps.len(),
    }
}

#[cfg(test)]
mod tests {
    use clap::Parser;

    use crate::args::TesterArgs;
    use crate::domain::run::{LoadMode, ProtocolKind};
    use crate::error::{AppError, ValidationError};

    use super::to_local_run_command;

    #[test]
    fn local_mapper_requires_url_or_scenario() {
        let args_result = TesterArgs::try_parse_from(["strest"]);
        assert!(
            args_result.is_ok(),
            "Expected CLI parsing to succeed without URL for mapper validation"
        );
        let args = if let Ok(args) = args_result {
            args
        } else {
            return;
        };

        let mapped = to_local_run_command(&args);
        assert!(
            mapped.is_err(),
            "Expected local command mapper to reject missing URL and scenario"
        );
        let err = if let Err(err) = mapped {
            err
        } else {
            return;
        };
        assert!(matches!(
            err,
            AppError::Validation(ValidationError::MissingUrl)
        ));
    }

    #[test]
    fn local_mapper_builds_domain_run_config() {
        let args_result = TesterArgs::try_parse_from([
            "strest",
            "--url",
            "grpc://127.0.0.1:50051/test.Service/Method",
            "--protocol",
            "grpc-unary",
            "--load-mode",
            "arrival",
        ]);
        assert!(
            args_result.is_ok(),
            "Expected CLI parsing to succeed for local mapper test"
        );
        let args = if let Ok(args) = args_result {
            args
        } else {
            return;
        };

        let mapped = to_local_run_command(&args);
        assert!(
            mapped.is_ok(),
            "Expected local command mapping to succeed for valid arguments"
        );
        let command = if let Ok(command) = mapped {
            command
        } else {
            return;
        };

        assert_eq!(command.run_config().protocol, ProtocolKind::GrpcUnary);
        assert_eq!(command.run_config().load_mode, LoadMode::Arrival);
        assert_eq!(
            command.run_config().target_url.as_deref(),
            Some("grpc://127.0.0.1:50051/test.Service/Method")
        );
        assert_eq!(command.run_config().scenario_step_count(), 0);
    }
}