mhost 0.0.7

Like `host`, but uses multiple DNS servers massively parallel and compares results
Documentation 
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extern crate assert_cli;

#[cfg(test)]
mod integration {
    use assert_cli;

    #[test]
    fn mhost_wo_args() {
        mhost()
            .fails()
            .and()
            .stderr().contains("error: The following required arguments were not provided:")
            .unwrap()
    }

    #[test]
    fn mhost_simple_lookup() {
        mhost()
            .with_args(&["www.example.com"])
            .succeeds()
            .and()
            .stdout().contains("* IPv4: 93.184.216.34")
            .and()
            .stdout().contains("* IPv6: 2606:2800:220:1:248:1893:25c8:1946")
            .unwrap()
    }

    #[test]
    fn mhost_simple_ipv4_reverse_lookup() {
        mhost()
            .with_args(&["8.8.8.8"])
            .succeeds()
            .and()
            .stdout().contains("* PTR: google-public-dns-a.google.com.")
            .unwrap()
    }

    #[test]
    fn mhost_simple_ipv6_reverse_lookup() {
        mhost()
            .with_args(&["2001:4860:4860::8888"])
            .succeeds()
            .and()
            .stdout().contains("* PTR: google-public-dns-a.google.com.")
            .unwrap()
    }

    // Since local development uses `cargo test` and Travis CI uses `cargo test --release` we need to distinguish,
    // which binary to call -- `#[cfg(debug_assertions)]` to the rescue.

    #[cfg(debug_assertions)]
    fn mhost() -> assert_cli::Assert {
        ::std::env::set_var("RUST_BACKTRACE", "1");
        assert_cli::Assert::command(&["./target/debug/mhost"])
    }

    #[cfg(not(debug_assertions))]
    fn mhost() -> assert_cli::Assert {
        ::std::env::set_var("RUST_BACKTRACE", "1");
        assert_cli::Assert::command(&["./target/release/mhost"])
    }
}