tests/runner.rs: use pretty-assertions crate

[ctz]

The workflow here involves looking for differences in output from the test programs between us and openssl. That is not very friendly because rust's default Debug format escapes newlines. Add a newtype for Output which doesn't do that.

This is before and after for artificial test failures:

Before:

thread 'ciphers' panicked at tests/runner.rs:317:5:
assertion `left == right` failed
  left: Output { status: ExitStatus(unix_wait_status(0)), stdout: "Found for 0xc02b\nopenssl_id=0x0300c02b protocol_id=0x0000c02b auth=1047 kx=1038 bits=128 alg_bits=128\nname='ECDHE-ECDSA-AES128-GCM-SHA256' standard_name='TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256' version='TLSv1.2'\ndesc='ECDHE-ECDSA-AES128-GCM-SHA256  TLSv1.2 Kx=ECDH     Au=ECDSA Enc=AESGCM(128)            Mac=AEAD\n'\nFound for 0xc02c\nopenssl_id=0x0300c02c protocol_id=0x0000c02c auth=1047 kx=1038 bits=256 alg_bits=256\nname='ECDHE-ECDSA-AES256-GCM-SHA384' standard_name='TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384' version='TLSv1.2'\ndesc='ECDHE-ECDSA-AES256-GCM-SHA384  TLSv1.2 Kx=ECDH     Au=ECDSA Enc=AESGCM(256)            Mac=AEAD\n'\nFound for 0xcca9\nopenssl_id=0x0300cca9 protocol_id=0x0000cca9 auth=1047 kx=1038 bits=256 alg_bits=256\nname='ECDHE-ECDSA-CHACHA20-POLY1305' standard_name='TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256' version='TLSv1.2'\ndesc='ECDHE-ECDSA-CHACHA20-POLY1305  TLSv1.2 Kx=ECDH     Au=ECDSA Enc=CHACHA20/POLY1305(256) Mac=AEAD\n'\nFound for 0xc02f\nopenssl_id=0x0300c02f protocol_id=0x0000c02f auth=1046 kx=1038 bits=128 alg_bits=128\nname='ECDHE-RSA-AES128-GCM-SHA256' standard_name='TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256' version='TLSv1.2'\ndesc='ECDHE-RSA-AES128-GCM-SHA256    TLSv1.2 Kx=ECDH     Au=RSA   Enc=AESGCM(128)            Mac=AEAD\n'\nFound for 0xc030\nopenssl_id=0x0300c030 protocol_id=0x0000c030 auth=1046 kx=1038 bits=256 alg_bits=256\nname='ECDHE-RSA-AES256-GCM-SHA384' standard_name='TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384' version='TLSv1.2'\ndesc='ECDHE-RSA-AES256-GCM-SHA384    TLSv1.2 Kx=ECDH     Au=RSA   Enc=AESGCM(256)            Mac=AEAD\n'\nFound for 0xcca8\nopenssl_id=0x0300cca8 protocol_id=0x0000cca8 auth=1046 kx=1038 bits=256 alg_bits=256\nname='ECDHE-RSA-CHACHA20-POLY1305' standard_name='TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256' version='TLSv1.2'\ndesc='ECDHE-RSA-CHACHA20-POLY1305    TLSv1.2 Kx=ECDH     Au=RSA   Enc=CHACHA20/POLY1305(256) Mac=AEAD\n'\nFound for 0x1301\nopenssl_id=0x03001301 protocol_id=0x00001301 auth=1064 kx=1063 bits=128 alg_bits=128\nname='TLS_AES_128_GCM_SHA256' standard_name='TLS_AES_128_GCM_SHA256' version='TLSv1.3'\ndesc='TLS_AES_128_GCM_SHA256         TLSv1.3 Kx=any      Au=any   Enc=AESGCM(128)            Mac=AEAD\n'\nFound for 0x1302\nopenssl_id=0x03001302 protocol_id=0x00001302 auth=1064 kx=1063 bits=256 alg_bits=256\nname='TLS_AES_256_GCM_SHA384' standard_name='TLS_AES_256_GCM_SHA384' version='TLSv1.3'\ndesc='TLS_AES_256_GCM_SHA384         TLSv1.3 Kx=any      Au=any   Enc=AESGCM(256)            Mac=AEAD\n'\nFound for 0x1303\nopenssl_id=0x03001303 protocol_id=0x00001303 auth=1064 kx=1063 bits=256 alg_bits=256\nname='TLS_CHACHA20_POLY1305_SHA256' standard_name='TLS_CHACHA20_POLY1305_SHA256' version='TLSv1.3'\ndesc='TLS_CHACHA20_POLY1305_SHA256   TLSv1.3 Kx=any      Au=any   Enc=CHACHA20/POLY1305(256) Mac=AEAD\n'\nopenssl_id=undef protocol_id=undef auth=undef kx=undef bits=0 alg_bits=-1\nname='(NONE)' standard_name='(NONE)' version='(NONE)'\ndesc=undef\n", stderr: "" }
 right: Output { status: ExitStatus(unix_wait_status(0)), stdout: "Found for 0xc02b\nopenssl_id=0x0300c02b protocol_id=0x0000c02b auth=1047 kx=9999 bits=128 alg_bits=128\nname='ECDHE-ECDSA-AES128-GCM-SHA256' standard_name='TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256' version='TLSv1.2'\ndesc='ECDHE-ECDSA-AES128-GCM-SHA256  TLSv1.2 Kx=ECDH     Au=ECDSA Enc=AESGCM(128)            Mac=AEAD\n'\nFound for 0xc02c\nopenssl_id=0x0300c02c protocol_id=0x0000c02c auth=1047 kx=9999 bits=256 alg_bits=256\nname='ECDHE-ECDSA-AES256-GCM-SHA384' standard_name='TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384' version='TLSv1.2'\ndesc='ECDHE-ECDSA-AES256-GCM-SHA384  TLSv1.2 Kx=ECDH     Au=ECDSA Enc=AESGCM(256)            Mac=AEAD\n'\nFound for 0xcca9\nopenssl_id=0x0300cca9 protocol_id=0x0000cca9 auth=1047 kx=9999 bits=256 alg_bits=256\nname='ECDHE-ECDSA-CHACHA20-POLY1305' standard_name='TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256' version='TLSv1.2'\ndesc='ECDHE-ECDSA-CHACHA20-POLY1305  TLSv1.2 Kx=ECDH     Au=ECDSA Enc=CHACHA20/POLY1305(256) Mac=AEAD\n'\nFound for 0xc02f\nopenssl_id=0x0300c02f protocol_id=0x0000c02f auth=1046 kx=9999 bits=128 alg_bits=128\nname='ECDHE-RSA-AES128-GCM-SHA256' standard_name='TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256' version='TLSv1.2'\ndesc='ECDHE-RSA-AES128-GCM-SHA256    TLSv1.2 Kx=ECDH     Au=RSA   Enc=AESGCM(128)            Mac=AEAD\n'\nFound for 0xc030\nopenssl_id=0x0300c030 protocol_id=0x0000c030 auth=1046 kx=9999 bits=256 alg_bits=256\nname='ECDHE-RSA-AES256-GCM-SHA384' standard_name='TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384' version='TLSv1.2'\ndesc='ECDHE-RSA-AES256-GCM-SHA384    TLSv1.2 Kx=ECDH     Au=RSA   Enc=AESGCM(256)            Mac=AEAD\n'\nFound for 0xcca8\nopenssl_id=0x0300cca8 protocol_id=0x0000cca8 auth=1046 kx=9999 bits=256 alg_bits=256\nname='ECDHE-RSA-CHACHA20-POLY1305' standard_name='TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256' version='TLSv1.2'\ndesc='ECDHE-RSA-CHACHA20-POLY1305    TLSv1.2 Kx=ECDH     Au=RSA   Enc=CHACHA20/POLY1305(256) Mac=AEAD\n'\nFound for 0x1301\nopenssl_id=0x03001301 protocol_id=0x00001301 auth=1064 kx=1063 bits=128 alg_bits=128\nname='TLS_AES_128_GCM_SHA256' standard_name='TLS_AES_128_GCM_SHA256' version='TLSv1.3'\ndesc='TLS_AES_128_GCM_SHA256         TLSv1.3 Kx=any      Au=any   Enc=AESGCM(128)            Mac=AEAD\n'\nFound for 0x1302\nopenssl_id=0x03001302 protocol_id=0x00001302 auth=1064 kx=1063 bits=256 alg_bits=256\nname='TLS_AES_256_GCM_SHA384' standard_name='TLS_AES_256_GCM_SHA384' version='TLSv1.3'\ndesc='TLS_AES_256_GCM_SHA384         TLSv1.3 Kx=any      Au=any   Enc=AESGCM(256)            Mac=AEAD\n'\nFound for 0x1303\nopenssl_id=0x03001303 protocol_id=0x00001303 auth=1064 kx=1063 bits=256 alg_bits=256\nname='TLS_CHACHA20_POLY1305_SHA256' standard_name='TLS_CHACHA20_POLY1305_SHA256' version='TLSv1.3'\ndesc='TLS_CHACHA20_POLY1305_SHA256   TLSv1.3 Kx=any      Au=any   Enc=CHACHA20/POLY1305(256) Mac=AEAD\n'\nopenssl_id=undef protocol_id=undef auth=undef kx=undef bits=0 alg_bits=-1\nname='(NONE)' standard_name='(NONE)' version='(NONE)'\ndesc=undef\n", stderr: "" }
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

After:

thread 'ciphers' panicked at tests/runner.rs:319:5:
assertion failed: `(left == right)`

Diff < left / right > :
 Output {
     status: ExitStatus(
         unix_wait_status(
             0,
         ),
     ),
     stdout: "<follows>",
     stderr: "<follows>",
 }
 stdout => Found for 0xc02b
<stdout => openssl_id=0x0300c02b protocol_id=0x0000c02b auth=1047 kx=1038 bits=128 alg_bits=128
>stdout => openssl_id=0x0300c02b protocol_id=0x0000c02b auth=1047 kx=9999 bits=128 alg_bits=128
 stdout => name='ECDHE-ECDSA-AES128-GCM-SHA256' standard_name='TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256' version='TLSv1.2'
 stdout => desc='ECDHE-ECDSA-AES128-GCM-SHA256  TLSv1.2 Kx=ECDH     Au=ECDSA Enc=AESGCM(128)            Mac=AEAD
 stdout => '
 stdout => Found for 0xc02c
<stdout => openssl_id=0x0300c02c protocol_id=0x0000c02c auth=1047 kx=1038 bits=256 alg_bits=256
>stdout => openssl_id=0x0300c02c protocol_id=0x0000c02c auth=1047 kx=9999 bits=256 alg_bits=256
 stdout => name='ECDHE-ECDSA-AES256-GCM-SHA384' standard_name='TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384' version='TLSv1.2'
 stdout => desc='ECDHE-ECDSA-AES256-GCM-SHA384  TLSv1.2 Kx=ECDH     Au=ECDSA Enc=AESGCM(256)            Mac=AEAD
 stdout => '
 stdout => Found for 0xcca9
<stdout => openssl_id=0x0300cca9 protocol_id=0x0000cca9 auth=1047 kx=1038 bits=256 alg_bits=256
>stdout => openssl_id=0x0300cca9 protocol_id=0x0000cca9 auth=1047 kx=9999 bits=256 alg_bits=256
 stdout => name='ECDHE-ECDSA-CHACHA20-POLY1305' standard_name='TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256' version='TLSv1.2'
 stdout => desc='ECDHE-ECDSA-CHACHA20-POLY1305  TLSv1.2 Kx=ECDH     Au=ECDSA Enc=CHACHA20/POLY1305(256) Mac=AEAD
 stdout => '
 stdout => Found for 0xc02f
<stdout => openssl_id=0x0300c02f protocol_id=0x0000c02f auth=1046 kx=1038 bits=128 alg_bits=128
>stdout => openssl_id=0x0300c02f protocol_id=0x0000c02f auth=1046 kx=9999 bits=128 alg_bits=128
 stdout => name='ECDHE-RSA-AES128-GCM-SHA256' standard_name='TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256' version='TLSv1.2'
 stdout => desc='ECDHE-RSA-AES128-GCM-SHA256    TLSv1.2 Kx=ECDH     Au=RSA   Enc=AESGCM(128)            Mac=AEAD
 stdout => '
 stdout => Found for 0xc030
<stdout => openssl_id=0x0300c030 protocol_id=0x0000c030 auth=1046 kx=1038 bits=256 alg_bits=256
>stdout => openssl_id=0x0300c030 protocol_id=0x0000c030 auth=1046 kx=9999 bits=256 alg_bits=256
 stdout => name='ECDHE-RSA-AES256-GCM-SHA384' standard_name='TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384' version='TLSv1.2'
 stdout => desc='ECDHE-RSA-AES256-GCM-SHA384    TLSv1.2 Kx=ECDH     Au=RSA   Enc=AESGCM(256)            Mac=AEAD
 stdout => '
 stdout => Found for 0xcca8
<stdout => openssl_id=0x0300cca8 protocol_id=0x0000cca8 auth=1046 kx=1038 bits=256 alg_bits=256
>stdout => openssl_id=0x0300cca8 protocol_id=0x0000cca8 auth=1046 kx=9999 bits=256 alg_bits=256
 stdout => name='ECDHE-RSA-CHACHA20-POLY1305' standard_name='TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256' version='TLSv1.2'
 stdout => desc='ECDHE-RSA-CHACHA20-POLY1305    TLSv1.2 Kx=ECDH     Au=RSA   Enc=CHACHA20/POLY1305(256) Mac=AEAD
 stdout => '
 stdout => Found for 0x1301
 stdout => openssl_id=0x03001301 protocol_id=0x00001301 auth=1064 kx=1063 bits=128 alg_bits=128
 stdout => name='TLS_AES_128_GCM_SHA256' standard_name='TLS_AES_128_GCM_SHA256' version='TLSv1.3'
 stdout => desc='TLS_AES_128_GCM_SHA256         TLSv1.3 Kx=any      Au=any   Enc=AESGCM(128)            Mac=AEAD
 stdout => '
 stdout => Found for 0x1302
 stdout => openssl_id=0x03001302 protocol_id=0x00001302 auth=1064 kx=1063 bits=256 alg_bits=256
 stdout => name='TLS_AES_256_GCM_SHA384' standard_name='TLS_AES_256_GCM_SHA384' version='TLSv1.3'
 stdout => desc='TLS_AES_256_GCM_SHA384         TLSv1.3 Kx=any      Au=any   Enc=AESGCM(256)            Mac=AEAD
 stdout => '
 stdout => Found for 0x1303
 stdout => openssl_id=0x03001303 protocol_id=0x00001303 auth=1064 kx=1063 bits=256 alg_bits=256
 stdout => name='TLS_CHACHA20_POLY1305_SHA256' standard_name='TLS_CHACHA20_POLY1305_SHA256' version='TLSv1.3'
 stdout => desc='TLS_CHACHA20_POLY1305_SHA256   TLSv1.3 Kx=any      Au=any   Enc=CHACHA20/POLY1305(256) Mac=AEAD
 stdout => '
 stdout => openssl_id=undef protocol_id=undef auth=undef kx=undef bits=0 alg_bits=-1
 stdout => name='(NONE)' standard_name='(NONE)' version='(NONE)'
 stdout => desc=undef



note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

It's also colour highlighted --

[cpu]

That's a really nice quality of life improvement 🤩