postgresql_embedded 0.1.0

Embed PostgreSQL in Rust applications
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use crate::command::traits::CommandBuilder;
use std::convert::AsRef;
use std::ffi::{OsStr, OsString};
use std::path::PathBuf;

/// determine fastest wal_sync_method for PostgreSQL
#[derive(Clone, Debug, Default)]
pub struct PgTestFsyncBuilder {
    program_dir: Option<PathBuf>,
    filename: Option<OsString>,
    secs_per_test: Option<usize>,
}

impl PgTestFsyncBuilder {
    /// Create a new [`PgTestFsyncBuilder`]
    pub fn new() -> Self {
        Self::default()
    }

    /// Location of the program binary
    pub fn program_dir<P: Into<PathBuf>>(mut self, path: P) -> Self {
        self.program_dir = Some(path.into());
        self
    }

    /// Set the filename
    pub fn filename<S: AsRef<OsStr>>(mut self, filename: S) -> Self {
        self.filename = Some(filename.as_ref().to_os_string());
        self
    }

    /// Set the seconds per test
    pub fn secs_per_test(mut self, secs: usize) -> Self {
        self.secs_per_test = Some(secs);
        self
    }
}

impl CommandBuilder for PgTestFsyncBuilder {
    /// Get the program name
    fn get_program(&self) -> &'static OsStr {
        "pg_test_fsync".as_ref()
    }

    /// Location of the program binary
    fn get_program_dir(&self) -> &Option<PathBuf> {
        &self.program_dir
    }

    /// Get the arguments for the command
    fn get_args(&self) -> Vec<OsString> {
        let mut args: Vec<OsString> = Vec::new();

        if let Some(filename) = &self.filename {
            args.push("-f".into());
            args.push(filename.into());
        }

        if let Some(secs) = &self.secs_per_test {
            args.push("-s".into());
            args.push(secs.to_string().into());
        }

        args
    }
}

#[cfg(test)]
mod tests {
    use super::*;
    use crate::command::traits::CommandToString;
    use test_log::test;

    #[test]
    fn test_builder_new() {
        let command = PgTestFsyncBuilder::new().program_dir(".").build();

        assert_eq!(
            PathBuf::from(".").join("pg_test_fsync"),
            PathBuf::from(command.to_command_string().replace("\"", ""))
        );
    }

    #[test]
    fn test_builder() {
        let command = PgTestFsyncBuilder::new()
            .filename("filename")
            .secs_per_test(10)
            .build();

        assert_eq!(
            r#""pg_test_fsync" "-f" "filename" "-s" "10""#,
            command.to_command_string()
        );
    }
}