Unit testing

How to ensure high quality components.

We recommend adding unit tests to all of your components in a project as soon as possible. Implementing unit tests not only ensures that your component works, but it also makes the project more maintainable in the long run as you will be notified when a component breaks.

This page describes how to add a unit test to your component.

Create unit test

Below is an example of how to add a unit test to a Viash component.

#!/bin/bash

## VIASH START
meta_executable="target/example_bash"
## VIASH END

echo ">>> Create input test file"
echo "foo" > foo.txt

echo ">>> Run executable"
$meta_executable --input foo.txt --output bar.txt

echo ">>> Check whether output file exists"
[[ -f bar.txt ]] (echo "Output file could not be found!" && exit 1)

echo ">>> Check whether input and output file are the same"
cmp foo.txt bar.tx (echo "Input and output files are different!" && exit 1)

echo ">>> Test finished successfully"
using System;
using System.IO;
using System.Diagnostics;

// VIASH START
var meta = new {
  executable = "target/example_csharp"
};
// VIASH END

string inputPath = "foo.txt";
string outputPath = "bar.txt";
string content = "hello\nthere\n";

Console.WriteLine(">>> Create input test file");
File.WriteAllText(inputPath, content);

Console.WriteLine(">>> Run executable");

var startInfo = new ProcessStartInfo(meta.executable)
{
    Arguments = $"--input {inputPath} --output {outputPath}",
    UseShellExecute = false,
    RedirectStandardOutput = true,
    CreateNoWindow = true
};
using(var cmd = Process.Start(startInfo))
{
    cmd.WaitForExit();
}


Console.WriteLine(">>> Check whether output file exists");
if (!File.Exists(outputPath)) {
    Console.WriteLine("Output file was not found");
    Environment.Exit(1);
}

Console.WriteLine(">>> Check whether input and output file are the same");
var outputLines = File.ReadAllText(outputPath);
if (content != outputLines) {
    Console.WriteLine(
        "Input and output should be the same\n" +
        $"expected content: {content}\n" +
        $"found: {outputLines}\n"
    );
    Environment.Exit(1);
}

Console.WriteLine(">>> Test finished successfully");
const fs = require('fs');
const child_process = require('child_process');

// VIASH START
let meta = {
  'executable': 'target/example_js'
};
// VIASH END

const inputPath = 'foo.txt';
const outputPath = 'bar.txt';
const content = 'hello\nthere\n';

console.log('>>> Create input test file');
fs.writeFileSync(inputPath, content, 'utf8');

console.log('>>> Run executable');
const cmdArgs = [
  '--input', inputPath,
  '--output', outputPath
];
const child = child_process.spawnSync(meta["executable"], cmdArgs);
if (child.error) {
  console.error(`Error: ${child.error}`);
  process.exit(1);
}

console.log('>>> Check whether output file exists');
if (!fs.existsSync(outputPath)) {
  console.error('Output file was not found');
  process.exit(1);
}

console.log('>>> Check whether input and output file are the same');
const outputLines = fs.readFileSync(outputPath, 'utf8');
if (content !== outputLines) {
  console.error(
    `Input and output should be the same\n` +
    `expected content: ${content}\n` +
    `found: ${outputLines}\n`
  );
  process.exit(1);
}

console.log('>>> Test finished successfully');
import subprocess
import os

input_path = "foo.txt"
output_path = "bar.txt"
content = "hello\nthere\n"

## VIASH START
meta = {
  "executable": "target/example_python"
}
## VIASH END

print(">>> Create input test file")
with open(input_path, "w") as file:
  file.write(content)

print(">>> Run executable")
cmd_args = [
  meta["executable"],
  "--input", input_path,
  "--output", output_path
]
subprocess.run(cmd_args, check=True)

print(">>> Check whether output file exists")
assert os.path.exists(output_path), "Output file was not found"

print(">>> Check whether input and output file are the same")
with open(output_path, "r", encoding="utf8") as file:
  output_lines = file.read()

assert content == output_lines, \
  "Input and output should be the same" \
  f"expected content: {content}" \
  f"found: {output_lines}"

print(">>> Test finished successfully")
## VIASH START
meta <- list(
  "target/example_r"
)
## VIASH END

input_path <- "foo.txt"
output_path <- "bar.txt"
content <- c("hello", "there")

cat(">>> Create input test file\n")
writeLines(content, input_path)

cat(">>> Run executable\n")
system2(
  meta$executable,
  c(
    "--input", input_path,
    "--output", output_path
  )
)

cat(">>> Check whether output file exists\n")
if (!file.exists(output_path)) {
  stop("Output file was not found")
}

cat(">>> Check whether input and output file are the same\n")
output_lines <- readLines(output_path)

if (!identical(content, output_lines)) {
  stop(paste0(
    "Input and output should be the same\n",
    "expected content: ", content, "\n",
    "found: ", output_lines, "\n"
  ))
}

cat(">>> Test finished successfully\n")
import scala.sys.process._
import java.nio.file.{Files, Paths}
import scala.io.Source

// VIASH START
case class ViashMeta(executable: String)
val meta = ViashMeta(
  "target/example_scala"
)
// VIASH END
val inputPath = Paths.get("foo.txt")
val outputPath = Paths.get("bar.txt")
val content = "hello\nthere"

println(">>> Create input test file")
Files.write(inputPath, content.getBytes("UTF-8"))

println(">>> Run executable")
s"${meta.executable} --input $inputPath --output $outputPath".!

println(">>> Check whether output file exists")
assert(Files.exists(outputPath), "Output file not found")

println(">>> Check whether input and output file are the same")
val outputLines = Source.fromFile(outputPath.toFile()).getLines.mkString("\n")
assert(
  content == outputLines, 
  s"""Output not the same
expected: '$content'
found: '$outputLines'
""".stripMargin
)

println(">>> Test finished successfully")
  1. Create an input file “foo.txt” with some sample content.
  2. Run an executable file specified in the “meta” dictionary with the arguments “–input foo.txt” and “–output bar.txt”.
  3. Check whether the output file “bar.txt” exists.
  4. Check whether the content of the output file is the same as the content of the input file.
  5. If both checks pass, the script prints “Test finished successfully”.
Important

A test script doesn’t need to be written in the same scripting language as the main script, as long as all of the required dependencies are available. This means the main script could be written in R, but the unit test could be written in Bash.

Add test to config

Next, we need to add the unit test to the test_resources section in the Viash config.

name: example_bash
description: A minimal example component.
arguments:
  - type: file
    name: --input
    example: file.txt
    required: true
  - type: file
    name: --output
    direction: output
    example: output.txt
    required: true
resources:
  - type: bash_script
    path: script.sh
engines:
  - type: docker
    image: bash:4.0
  - type: native
runners:
  - type: executable
  - type: nextflow
test_resources:
  - type: bash_script
    path: test.sh
name: example_csharp
description: A minimal example component.
arguments:
  - type: file
    name: --input
    example: file.txt
    required: true
  - type: file
    name: --output
    direction: output
    example: output.txt
    required: true
resources:
  - type: csharp_script
    path: script.csx
engines:
  - type: docker
    image: ghcr.io/data-intuitive/dotnet-script:1.3.1
  - type: native
runners:
  - type: executable
  - type: nextflow
test_resources:
  - type: csharp_script
    path: test.csx
name: example_js
description: A minimal example component.
arguments:
  - type: file
    name: --input
    example: file.txt
    required: true
  - type: file
    name: --output
    direction: output
    example: output.txt
    required: true
resources:
  - type: javascript_script
    path: script.js
engines:
  - type: docker
    image: node:19-bullseye-slim
  - type: native
runners:
  - type: executable
  - type: nextflow
test_resources:
  - type: javascript_script
    path: test.js
name: example_python
description: A minimal example component.
arguments:
  - type: file
    name: --input
    example: file.txt
    required: true
  - type: file
    name: --output
    direction: output
    example: output.txt
    required: true
resources:
  - type: python_script
    path: script.py
engines:
  - type: docker
    image: python:3.10-slim
  - type: native
runners:
  - type: executable
  - type: nextflow
test_resources:
  - type: python_script
    path: test.py
name: example_r
description: A minimal example component.
arguments:
  - type: file
    name: --input
    example: file.txt
    required: true
  - type: file
    name: --output
    direction: output
    example: output.txt
    required: true
resources:
  - type: r_script
    path: script.R
engines:
  - type: docker
    image: eddelbuettel/r2u:22.04
  - type: native
runners:
  - type: executable
  - type: nextflow
test_resources:
  - type: r_script
    path: test.R
name: example_scala
description: A minimal example component.
arguments:
  - type: file
    name: --input
    example: file.txt
    required: true
  - type: file
    name: --output
    direction: output
    example: output.txt
    required: true
resources:
  - type: scala_script
    path: script.scala
engines:
  - type: docker
    image: sbtscala/scala-sbt:eclipse-temurin-19_36_1.7.2_2.13.10
  - type: native
runners:
  - type: executable
  - type: nextflow
test_resources:
  - type: scala_script
    path: test.scala

Note that if you can add multiple unit tests to the test_resources section, they will all be evaluated. You can also add other resources, similar to what is described in the page on adding resources.

Run the unit test

You can run the unit test as follows:

viash test config.vsh.yaml
Running tests in temporary directory: '/tmp/viash_test_example_bash_2728114652366196297'
====================================================================
+/tmp/viash_test_example_bash_2728114652366196297/build_engine_environment/example_bash ---verbosity 6 ---setup cachedbuild ---engine docker
[notice] Building container 'example_bash:test' with Dockerfile
[info] docker build -t 'example_bash:test'  '/tmp/viash_test_example_bash_2728114652366196297/build_engine_environment' -f '/tmp/viash_test_example_bash_2728114652366196297/build_engine_environment/tmp/dockerbuild-example_bash-8dowOy/Dockerfile'
#0 building with "default" instance using docker driver

#1 [internal] load build definition from Dockerfile
#1 transferring dockerfile: 276B done
#1 DONE 0.0s

#2 [internal] load metadata for docker.io/library/bash:4.0
#2 DONE 0.3s

#3 [internal] load .dockerignore
#3 transferring context: 2B done
#3 DONE 0.0s

#4 [1/1] FROM docker.io/library/bash:4.0@sha256:ecce985ad9dcc2dbf7b93f53d8254dc5e9c559d4ac8763b1e48894cd808003e2
#4 resolve docker.io/library/bash:4.0@sha256:ecce985ad9dcc2dbf7b93f53d8254dc5e9c559d4ac8763b1e48894cd808003e2 done
#4 extracting sha256:c6a83fedfae6ed8a4f5f7cbb6a7b6f1c1ec3d86fea8cb9e5ba2e5e6673fde9f6
#4 extracting sha256:c6a83fedfae6ed8a4f5f7cbb6a7b6f1c1ec3d86fea8cb9e5ba2e5e6673fde9f6 0.1s done
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#4 extracting sha256:d5c2a1928f0388c2922e6142f4d53a0939d39b79059ed33b88f888deed53fe06 done
#4 DONE 0.3s

#5 exporting to image
#5 exporting layers done
#5 writing image sha256:d17a4bd2fecea8c74cc0bc388b3883dc40b151d5b9f8cf31ecddc8c940273842 done
#5 naming to docker.io/library/example_bash:test done
#5 DONE 0.0s
====================================================================
+/tmp/viash_test_example_bash_2728114652366196297/test_test/test_executable
>>> Create input test file
>>> Run executable
Copying 'foo.txt' to 'bar.txt'.
>>> Check whether output file exists
>>> Check whether input and output file are the same
>>> Test finished successfully
====================================================================
SUCCESS! All 1 out of 1 test scripts succeeded!
Cleaning up temporary directory
viash test config.vsh.yaml
Running tests in temporary directory: '/tmp/viash_test_example_csharp_8572159646341222709'
====================================================================
+/tmp/viash_test_example_csharp_8572159646341222709/build_engine_environment/example_csharp ---verbosity 6 ---setup cachedbuild ---engine docker
[notice] Building container 'example_csharp:test' with Dockerfile
[info] docker build -t 'example_csharp:test'  '/tmp/viash_test_example_csharp_8572159646341222709/build_engine_environment' -f '/tmp/viash_test_example_csharp_8572159646341222709/build_engine_environment/tmp/dockerbuild-example_csharp-OeFP1V/Dockerfile'
#0 building with "default" instance using docker driver

#1 [internal] load build definition from Dockerfile
#1 transferring dockerfile: 312B done
#1 DONE 0.0s

#2 [internal] load metadata for ghcr.io/data-intuitive/dotnet-script:1.3.1
#2 DONE 0.2s

#3 [internal] load .dockerignore
#3 transferring context: 2B done
#3 DONE 0.0s

#4 [1/1] FROM ghcr.io/data-intuitive/dotnet-script:1.3.1@sha256:d95bf2a2b3e095e5b02960ab4ddd4674d798a1493ed0dc5cf427c77a5ed90ed3
#4 resolve ghcr.io/data-intuitive/dotnet-script:1.3.1@sha256:d95bf2a2b3e095e5b02960ab4ddd4674d798a1493ed0dc5cf427c77a5ed90ed3 done
#4 extracting sha256:df9b9388f04ad6279a7410b85cedfdcb2208c0a003da7ab5613af71079148139
#4 sha256:3ae3a38ed752842e75d1609c931b29e565b53c24229c87bf1ba64251b5f1f094 1.05MB / 1.74MB 0.1s
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#4 extracting sha256:d772c6b09cca24a6ec7cb06facff8b7be509b608330bd035f91b70388a94d3b4 0.1s
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#4 extracting sha256:2c56128c63bdf4a1d571ed930304f4eb77e8e2fde7ce03ddf6073e3df9abf8ad 0.1s done
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#4 extracting sha256:16def9f17d8d9988a074a1d3ae42cb041b261068b3a455c99141bb8df243e9a4
#4 extracting sha256:16def9f17d8d9988a074a1d3ae42cb041b261068b3a455c99141bb8df243e9a4 0.0s done
#4 extracting sha256:03ac08f8f1d3c646d8f456ad0e2307b56511e692bcef7a4d67ec194ba81f59e7 done
#4 DONE 4.8s

#5 exporting to image
#5 exporting layers done
#5 writing image sha256:bd1302ecb4e7862cf11e5bc569e6e8a8dfe3bff5b0529f1e6fa6355a9dd8b094 done
#5 naming to docker.io/library/example_csharp:test done
#5 DONE 0.0s
====================================================================
+/tmp/viash_test_example_csharp_8572159646341222709/test_test/test_executable
>>> Create input test file
>>> Run executable
>>> Check whether output file exists
>>> Check whether input and output file are the same
>>> Test finished successfully
====================================================================
SUCCESS! All 1 out of 1 test scripts succeeded!
Cleaning up temporary directory
viash test config.vsh.yaml
Running tests in temporary directory: '/tmp/viash_test_example_js_12995503927895851965'
====================================================================
+/tmp/viash_test_example_js_12995503927895851965/build_engine_environment/example_js ---verbosity 6 ---setup cachedbuild ---engine docker
[notice] Building container 'example_js:test' with Dockerfile
[info] docker build -t 'example_js:test'  '/tmp/viash_test_example_js_12995503927895851965/build_engine_environment' -f '/tmp/viash_test_example_js_12995503927895851965/build_engine_environment/tmp/dockerbuild-example_js-JJ1RBV/Dockerfile'
#0 building with "default" instance using docker driver

#1 [internal] load build definition from Dockerfile
#1 transferring dockerfile: 287B done
#1 DONE 0.0s

#2 [internal] load metadata for docker.io/library/node:19-bullseye-slim
#2 DONE 0.3s

#3 [internal] load .dockerignore
#3 transferring context: 2B done
#3 DONE 0.0s

#4 [1/1] FROM docker.io/library/node:19-bullseye-slim@sha256:f58f1fcf5c9ff9e3752993edb4ed6dbd35697124c85a43f3b97aa054500b0534
#4 resolve docker.io/library/node:19-bullseye-slim@sha256:f58f1fcf5c9ff9e3752993edb4ed6dbd35697124c85a43f3b97aa054500b0534 done
#4 sha256:adbc02574b521bb652d771c8ac0282c724b9fe90c001f3bab0825c32092c9036 6.84kB / 6.84kB done
#4 sha256:f03b40093957615593f2ed142961afb6b540507e0b47e3f7626ba5e02efbbbf1 6.29MB / 31.40MB 0.1s
#4 sha256:0bfad7312c25e414fc3d0e3640a77bd4b5c74d2118595670999afef9758cb49b 4.19kB / 4.19kB 0.1s done
#4 sha256:56db04c463e993ac037103947cd590d52fcddcb17ad04285a0ca4c3510c0738c 0B / 46.62MB 0.1s
#4 sha256:477c7ebfb8500396b86c69952acb17b909a0a63da41e03dd4046e2c809722c6e 0B / 2.76MB 0.1s
#4 sha256:f58f1fcf5c9ff9e3752993edb4ed6dbd35697124c85a43f3b97aa054500b0534 1.21kB / 1.21kB done
#4 sha256:63b5ca0f90dbaf64465a83d46276e133eab30410f642808d158bf98928811999 1.37kB / 1.37kB done
#4 sha256:f03b40093957615593f2ed142961afb6b540507e0b47e3f7626ba5e02efbbbf1 12.58MB / 31.40MB 0.2s
#4 sha256:56db04c463e993ac037103947cd590d52fcddcb17ad04285a0ca4c3510c0738c 18.87MB / 46.62MB 0.2s
#4 sha256:477c7ebfb8500396b86c69952acb17b909a0a63da41e03dd4046e2c809722c6e 2.76MB / 2.76MB 0.2s done
#4 sha256:8bb4aa3e51be63d4a2e5bd30ab9cd478a916ed3c5c0212a44b96fd743e0e0f2f 0B / 450B 0.2s
#4 sha256:f03b40093957615593f2ed142961afb6b540507e0b47e3f7626ba5e02efbbbf1 29.36MB / 31.40MB 0.3s
#4 sha256:56db04c463e993ac037103947cd590d52fcddcb17ad04285a0ca4c3510c0738c 46.15MB / 46.62MB 0.3s
#4 sha256:8bb4aa3e51be63d4a2e5bd30ab9cd478a916ed3c5c0212a44b96fd743e0e0f2f 450B / 450B 0.2s done
#4 extracting sha256:f03b40093957615593f2ed142961afb6b540507e0b47e3f7626ba5e02efbbbf1
#4 sha256:f03b40093957615593f2ed142961afb6b540507e0b47e3f7626ba5e02efbbbf1 31.40MB / 31.40MB 0.4s done
#4 sha256:56db04c463e993ac037103947cd590d52fcddcb17ad04285a0ca4c3510c0738c 46.62MB / 46.62MB 0.3s done
#4 extracting sha256:f03b40093957615593f2ed142961afb6b540507e0b47e3f7626ba5e02efbbbf1 1.1s done
#4 extracting sha256:0bfad7312c25e414fc3d0e3640a77bd4b5c74d2118595670999afef9758cb49b done
#4 extracting sha256:56db04c463e993ac037103947cd590d52fcddcb17ad04285a0ca4c3510c0738c
#4 extracting sha256:56db04c463e993ac037103947cd590d52fcddcb17ad04285a0ca4c3510c0738c 1.7s done
#4 extracting sha256:477c7ebfb8500396b86c69952acb17b909a0a63da41e03dd4046e2c809722c6e
#4 extracting sha256:477c7ebfb8500396b86c69952acb17b909a0a63da41e03dd4046e2c809722c6e 0.1s done
#4 extracting sha256:8bb4aa3e51be63d4a2e5bd30ab9cd478a916ed3c5c0212a44b96fd743e0e0f2f done
#4 DONE 3.6s

#5 exporting to image
#5 exporting layers done
#5 writing image sha256:6444d7652094234325d470434ccc78d9c5880713b78f0d28400dc8c572c44882 done
#5 naming to docker.io/library/example_js:test done
#5 DONE 0.0s
====================================================================
+/tmp/viash_test_example_js_12995503927895851965/test_test/test_executable
>>> Create input test file
>>> Run executable
>>> Check whether output file exists
>>> Check whether input and output file are the same
>>> Test finished successfully
====================================================================
SUCCESS! All 1 out of 1 test scripts succeeded!
Cleaning up temporary directory
viash test config.vsh.yaml
Running tests in temporary directory: '/tmp/viash_test_example_python_18294340906199409879'
====================================================================
+/tmp/viash_test_example_python_18294340906199409879/build_engine_environment/example_python ---verbosity 6 ---setup cachedbuild ---engine docker
[notice] Building container 'example_python:test' with Dockerfile
[info] docker build -t 'example_python:test'  '/tmp/viash_test_example_python_18294340906199409879/build_engine_environment' -f '/tmp/viash_test_example_python_18294340906199409879/build_engine_environment/tmp/dockerbuild-example_python-mJkT6c/Dockerfile'
#0 building with "default" instance using docker driver

#1 [internal] load build definition from Dockerfile
#1 transferring dockerfile: 286B done
#1 DONE 0.0s

#2 [internal] load metadata for docker.io/library/python:3.10-slim
#2 DONE 0.2s

#3 [internal] load .dockerignore
#3 transferring context: 2B done
#3 DONE 0.0s

#4 [1/1] FROM docker.io/library/python:3.10-slim@sha256:2407c61b1a18067393fecd8a22cf6fceede893b6aaca817bf9fbfe65e33614a3
#4 resolve docker.io/library/python:3.10-slim@sha256:2407c61b1a18067393fecd8a22cf6fceede893b6aaca817bf9fbfe65e33614a3 done
#4 sha256:8e5ea4b05e7847d7d427d0c198e447f15046bbd1bb05c0cf5e5910a57a10e74a 0B / 3.51MB 0.1s
#4 sha256:c7cce4b47466ce261eef7580051e8a159e55458a2bf91aa24ef5a238ea6600a4 0B / 12.38MB 0.1s
#4 sha256:2407c61b1a18067393fecd8a22cf6fceede893b6aaca817bf9fbfe65e33614a3 9.13kB / 9.13kB done
#4 sha256:45360d9eb0ff89a954085c2b36883b65b08d1549aa9ede50e48bdcadf34d2f3f 1.94kB / 1.94kB done
#4 sha256:fbbf892218b1c5e9d6abd20c2a7a72bcb701ba1b6bdfa31bae7851976d4bd3b5 6.91kB / 6.91kB done
#4 sha256:a2318d6c47ec9cac5acc500c47c79602bcf953cec711a18bc898911a0984365b 9.44MB / 29.13MB 0.1s
#4 sha256:8e5ea4b05e7847d7d427d0c198e447f15046bbd1bb05c0cf5e5910a57a10e74a 3.51MB / 3.51MB 0.1s done
#4 sha256:c7cce4b47466ce261eef7580051e8a159e55458a2bf91aa24ef5a238ea6600a4 3.15MB / 12.38MB 0.2s
#4 sha256:a2318d6c47ec9cac5acc500c47c79602bcf953cec711a18bc898911a0984365b 29.13MB / 29.13MB 0.2s
#4 sha256:552394845013add00a23f1fed75ac2e8146f19bbebacf6a0c223805da2272ee8 231B / 231B 0.2s
#4 extracting sha256:a2318d6c47ec9cac5acc500c47c79602bcf953cec711a18bc898911a0984365b
#4 sha256:c7cce4b47466ce261eef7580051e8a159e55458a2bf91aa24ef5a238ea6600a4 9.44MB / 12.38MB 0.3s
#4 sha256:a2318d6c47ec9cac5acc500c47c79602bcf953cec711a18bc898911a0984365b 29.13MB / 29.13MB 0.2s done
#4 sha256:552394845013add00a23f1fed75ac2e8146f19bbebacf6a0c223805da2272ee8 231B / 231B 0.2s done
#4 sha256:23283c2309fa3f1cf954a9ab58647a2458301eb2c41db3fc0920bbfb1856c1fc 3.16MB / 3.16MB 0.3s done
#4 sha256:c7cce4b47466ce261eef7580051e8a159e55458a2bf91aa24ef5a238ea6600a4 12.38MB / 12.38MB 0.4s
#4 sha256:c7cce4b47466ce261eef7580051e8a159e55458a2bf91aa24ef5a238ea6600a4 12.38MB / 12.38MB 0.4s done
#4 extracting sha256:a2318d6c47ec9cac5acc500c47c79602bcf953cec711a18bc898911a0984365b 1.0s done
#4 extracting sha256:8e5ea4b05e7847d7d427d0c198e447f15046bbd1bb05c0cf5e5910a57a10e74a
#4 extracting sha256:8e5ea4b05e7847d7d427d0c198e447f15046bbd1bb05c0cf5e5910a57a10e74a 0.1s done
#4 extracting sha256:c7cce4b47466ce261eef7580051e8a159e55458a2bf91aa24ef5a238ea6600a4
#4 extracting sha256:c7cce4b47466ce261eef7580051e8a159e55458a2bf91aa24ef5a238ea6600a4 0.4s done
#4 extracting sha256:552394845013add00a23f1fed75ac2e8146f19bbebacf6a0c223805da2272ee8
#4 extracting sha256:552394845013add00a23f1fed75ac2e8146f19bbebacf6a0c223805da2272ee8 done
#4 extracting sha256:23283c2309fa3f1cf954a9ab58647a2458301eb2c41db3fc0920bbfb1856c1fc 0.1s
#4 extracting sha256:23283c2309fa3f1cf954a9ab58647a2458301eb2c41db3fc0920bbfb1856c1fc 0.2s done
#4 DONE 2.2s

#5 exporting to image
#5 exporting layers done
#5 writing image sha256:7897b976e8e752d8bef8232c0a08ef4293df6b13c65cdf748ef23fcf68e3be0d done
#5 naming to docker.io/library/example_python:test done
#5 DONE 0.0s
====================================================================
+/tmp/viash_test_example_python_18294340906199409879/test_test/test_executable
Copying 'foo.txt' to 'bar.txt'.
>>> Create input test file
>>> Run executable
>>> Check whether output file exists
>>> Check whether input and output file are the same
>>> Test finished successfully
====================================================================
SUCCESS! All 1 out of 1 test scripts succeeded!
Cleaning up temporary directory
viash test config.vsh.yaml
Running tests in temporary directory: '/tmp/viash_test_example_r_2598860764507128938'
====================================================================
+/tmp/viash_test_example_r_2598860764507128938/build_engine_environment/example_r ---verbosity 6 ---setup cachedbuild ---engine docker
[notice] Building container 'example_r:test' with Dockerfile
[info] docker build -t 'example_r:test'  '/tmp/viash_test_example_r_2598860764507128938/build_engine_environment' -f '/tmp/viash_test_example_r_2598860764507128938/build_engine_environment/tmp/dockerbuild-example_r-9NPrMj/Dockerfile'
#0 building with "default" instance using docker driver

#1 [internal] load build definition from Dockerfile
#1 transferring dockerfile: 287B done
#1 DONE 0.0s

#2 [internal] load metadata for docker.io/eddelbuettel/r2u:22.04
#2 DONE 0.2s

#3 [internal] load .dockerignore
#3 transferring context: 2B done
#3 DONE 0.0s

#4 [1/1] FROM docker.io/eddelbuettel/r2u:22.04@sha256:19743c5d7d6ea79e80653b5f5c0a0fd24978959b5cbe6963f4afacc7282d9b2d
#4 resolve docker.io/eddelbuettel/r2u:22.04@sha256:19743c5d7d6ea79e80653b5f5c0a0fd24978959b5cbe6963f4afacc7282d9b2d done
#4 sha256:19743c5d7d6ea79e80653b5f5c0a0fd24978959b5cbe6963f4afacc7282d9b2d 954B / 954B done
#4 sha256:58c7af82af1f2466227bf182914ba3bdabe245f39e3f17219ac3e1ca95143395 5.85kB / 5.85kB done
#4 sha256:e96e057aae67380a4ddb16c337c5c3669d97fdff69ec537f02aa2cc30d814281 5.24MB / 30.43MB 0.1s
#4 sha256:eaff24e0879bbea00d85cf18271323596be3ff755468261f0ec9c5f9806429da 0B / 43.94MB 0.1s
#4 sha256:9d32dcd802e5d4fe75096c7366e6cbd9045fbe1b948143cf2fd6350350b28e86 0B / 242.17MB 0.1s
#4 sha256:e96e057aae67380a4ddb16c337c5c3669d97fdff69ec537f02aa2cc30d814281 27.26MB / 30.43MB 0.3s
#4 sha256:eaff24e0879bbea00d85cf18271323596be3ff755468261f0ec9c5f9806429da 9.44MB / 43.94MB 0.3s
#4 sha256:9d32dcd802e5d4fe75096c7366e6cbd9045fbe1b948143cf2fd6350350b28e86 24.12MB / 242.17MB 0.3s
#4 sha256:e96e057aae67380a4ddb16c337c5c3669d97fdff69ec537f02aa2cc30d814281 30.43MB / 30.43MB 0.3s done
#4 sha256:eaff24e0879bbea00d85cf18271323596be3ff755468261f0ec9c5f9806429da 13.63MB / 43.94MB 0.4s
#4 extracting sha256:e96e057aae67380a4ddb16c337c5c3669d97fdff69ec537f02aa2cc30d814281 0.1s
#4 sha256:eaff24e0879bbea00d85cf18271323596be3ff755468261f0ec9c5f9806429da 17.83MB / 43.94MB 0.5s
#4 sha256:9d32dcd802e5d4fe75096c7366e6cbd9045fbe1b948143cf2fd6350350b28e86 42.99MB / 242.17MB 0.5s
#4 sha256:eaff24e0879bbea00d85cf18271323596be3ff755468261f0ec9c5f9806429da 28.31MB / 43.94MB 0.6s
#4 sha256:9d32dcd802e5d4fe75096c7366e6cbd9045fbe1b948143cf2fd6350350b28e86 57.67MB / 242.17MB 0.6s
#4 sha256:eaff24e0879bbea00d85cf18271323596be3ff755468261f0ec9c5f9806429da 35.65MB / 43.94MB 0.9s
#4 sha256:9d32dcd802e5d4fe75096c7366e6cbd9045fbe1b948143cf2fd6350350b28e86 96.47MB / 242.17MB 0.9s
#4 sha256:eaff24e0879bbea00d85cf18271323596be3ff755468261f0ec9c5f9806429da 38.80MB / 43.94MB 1.0s
#4 sha256:9d32dcd802e5d4fe75096c7366e6cbd9045fbe1b948143cf2fd6350350b28e86 122.68MB / 242.17MB 1.1s
#4 sha256:eaff24e0879bbea00d85cf18271323596be3ff755468261f0ec9c5f9806429da 41.94MB / 43.94MB 1.2s
#4 sha256:9d32dcd802e5d4fe75096c7366e6cbd9045fbe1b948143cf2fd6350350b28e86 136.31MB / 242.17MB 1.2s
#4 sha256:eaff24e0879bbea00d85cf18271323596be3ff755468261f0ec9c5f9806429da 43.94MB / 43.94MB 1.3s done
#4 sha256:9d32dcd802e5d4fe75096c7366e6cbd9045fbe1b948143cf2fd6350350b28e86 159.38MB / 242.17MB 1.4s
#4 extracting sha256:e96e057aae67380a4ddb16c337c5c3669d97fdff69ec537f02aa2cc30d814281 1.0s done
#4 extracting sha256:eaff24e0879bbea00d85cf18271323596be3ff755468261f0ec9c5f9806429da 0.1s
#4 sha256:9d32dcd802e5d4fe75096c7366e6cbd9045fbe1b948143cf2fd6350350b28e86 183.50MB / 242.17MB 1.6s
#4 sha256:9d32dcd802e5d4fe75096c7366e6cbd9045fbe1b948143cf2fd6350350b28e86 202.38MB / 242.17MB 1.8s
#4 sha256:9d32dcd802e5d4fe75096c7366e6cbd9045fbe1b948143cf2fd6350350b28e86 219.15MB / 242.17MB 1.9s
#4 sha256:9d32dcd802e5d4fe75096c7366e6cbd9045fbe1b948143cf2fd6350350b28e86 237.01MB / 242.17MB 2.0s
#4 extracting sha256:eaff24e0879bbea00d85cf18271323596be3ff755468261f0ec9c5f9806429da 0.6s done
#4 sha256:9d32dcd802e5d4fe75096c7366e6cbd9045fbe1b948143cf2fd6350350b28e86 242.17MB / 242.17MB 2.4s done
#4 extracting sha256:9d32dcd802e5d4fe75096c7366e6cbd9045fbe1b948143cf2fd6350350b28e86
#4 extracting sha256:9d32dcd802e5d4fe75096c7366e6cbd9045fbe1b948143cf2fd6350350b28e86 5.2s
#4 extracting sha256:9d32dcd802e5d4fe75096c7366e6cbd9045fbe1b948143cf2fd6350350b28e86 5.4s done
#4 DONE 9.6s

#5 exporting to image
#5 exporting layers done
#5 writing image sha256:f944552867b8ec697c3849933f1bf04e357a8fb24fb6c27ea2839c60147ed9df done
#5 naming to docker.io/library/example_r:test done
#5 DONE 0.1s
====================================================================
+/tmp/viash_test_example_r_2598860764507128938/test_test/test_executable
>>> Create input test file
>>> Run executable
Copying 'foo.txt' to 'bar.txt'.
[1] TRUE
>>> Check whether output file exists
>>> Check whether input and output file are the same
>>> Test finished successfully
====================================================================
SUCCESS! All 1 out of 1 test scripts succeeded!
Cleaning up temporary directory
viash test config.vsh.yaml
Running tests in temporary directory: '/tmp/viash_test_example_scala_15405084999920020089'
====================================================================
+/tmp/viash_test_example_scala_15405084999920020089/build_engine_environment/example_scala ---verbosity 6 ---setup cachedbuild ---engine docker
[notice] Building container 'example_scala:test' with Dockerfile
[info] docker build -t 'example_scala:test'  '/tmp/viash_test_example_scala_15405084999920020089/build_engine_environment' -f '/tmp/viash_test_example_scala_15405084999920020089/build_engine_environment/tmp/dockerbuild-example_scala-SOYvPa/Dockerfile'
#0 building with "default" instance using docker driver

#1 [internal] load build definition from Dockerfile
#1 transferring dockerfile: 323B done
#1 DONE 0.0s

#2 [internal] load metadata for docker.io/sbtscala/scala-sbt:eclipse-temurin-19_36_1.7.2_2.13.10
#2 DONE 0.3s

#3 [internal] load .dockerignore
#3 transferring context: 2B done
#3 DONE 0.0s

#4 [1/1] FROM docker.io/sbtscala/scala-sbt:eclipse-temurin-19_36_1.7.2_2.13.10@sha256:440234e283754375d5ab6bcb35e2d470f9dabeaaeb639d8c0708fac2d3707e0c
#4 resolve docker.io/sbtscala/scala-sbt:eclipse-temurin-19_36_1.7.2_2.13.10@sha256:440234e283754375d5ab6bcb35e2d470f9dabeaaeb639d8c0708fac2d3707e0c done
#4 sha256:06478611ba16efc6663ccf5f22a29c990c53aed6848bc58c54c67dc32d8aef13 3.04kB / 3.04kB done
#4 sha256:c5c735a83dbd58e1c83f8d52abdc51068e27c00405f53d59802d4954a6b5398a 3.15MB / 16.99MB 0.1s
#4 sha256:440234e283754375d5ab6bcb35e2d470f9dabeaaeb639d8c0708fac2d3707e0c 743B / 743B done
#4 sha256:76808e2ea8df2d9cac1d275426e51a2190369f706076c55ac2da3823bef0a019 10.89kB / 10.89kB done
#4 sha256:301a8b74f71f85f3a31e9c7e7fedd5b001ead5bcf895bc2911c1d260e06bd987 8.39MB / 30.43MB 0.1s
#4 sha256:5fb9fa7513e6a72bf7daf0a75e97c441f1ed7ff69c8609d1c429fdf3a6dc846b 4.19MB / 200.85MB 0.1s
#4 sha256:c5c735a83dbd58e1c83f8d52abdc51068e27c00405f53d59802d4954a6b5398a 16.99MB / 16.99MB 0.2s done
#4 sha256:301a8b74f71f85f3a31e9c7e7fedd5b001ead5bcf895bc2911c1d260e06bd987 15.73MB / 30.43MB 0.2s
#4 sha256:5fb9fa7513e6a72bf7daf0a75e97c441f1ed7ff69c8609d1c429fdf3a6dc846b 16.78MB / 200.85MB 0.2s
#4 sha256:2af8e2a543d81b57575a2e457bd1e98ffc061b15639dac3be5ff6c2702b9ea1a 0B / 175B 0.2s
#4 sha256:301a8b74f71f85f3a31e9c7e7fedd5b001ead5bcf895bc2911c1d260e06bd987 30.43MB / 30.43MB 0.3s
#4 sha256:5fb9fa7513e6a72bf7daf0a75e97c441f1ed7ff69c8609d1c429fdf3a6dc846b 28.39MB / 200.85MB 0.3s
#4 sha256:2af8e2a543d81b57575a2e457bd1e98ffc061b15639dac3be5ff6c2702b9ea1a 175B / 175B 0.2s done
#4 sha256:14d68137d870fdc4bc849fbe5c5571ca3e6d9a7b2c5bf1c7e928ccf716dd3b4a 5.24MB / 29.75MB 0.3s
#4 sha256:301a8b74f71f85f3a31e9c7e7fedd5b001ead5bcf895bc2911c1d260e06bd987 30.43MB / 30.43MB 0.3s done
#4 sha256:5fb9fa7513e6a72bf7daf0a75e97c441f1ed7ff69c8609d1c429fdf3a6dc846b 41.94MB / 200.85MB 0.4s
#4 sha256:14d68137d870fdc4bc849fbe5c5571ca3e6d9a7b2c5bf1c7e928ccf716dd3b4a 20.97MB / 29.75MB 0.4s
#4 extracting sha256:301a8b74f71f85f3a31e9c7e7fedd5b001ead5bcf895bc2911c1d260e06bd987 0.1s
#4 sha256:320659737461e071e3d809231861a7487daaa79805c57f97015ff020f34a939a 1.05MB / 23.71MB 0.4s
#4 sha256:5fb9fa7513e6a72bf7daf0a75e97c441f1ed7ff69c8609d1c429fdf3a6dc846b 54.53MB / 200.85MB 0.5s
#4 sha256:14d68137d870fdc4bc849fbe5c5571ca3e6d9a7b2c5bf1c7e928ccf716dd3b4a 29.75MB / 29.75MB 0.5s done
#4 sha256:320659737461e071e3d809231861a7487daaa79805c57f97015ff020f34a939a 5.24MB / 23.71MB 0.5s
#4 sha256:1dea7716181a505cea41832dc84691b858a8f64471cb352d8c29cec06e428aeb 0B / 40.48MB 0.5s
#4 sha256:5fb9fa7513e6a72bf7daf0a75e97c441f1ed7ff69c8609d1c429fdf3a6dc846b 66.06MB / 200.85MB 0.6s
#4 sha256:320659737461e071e3d809231861a7487daaa79805c57f97015ff020f34a939a 10.49MB / 23.71MB 0.6s
#4 sha256:1dea7716181a505cea41832dc84691b858a8f64471cb352d8c29cec06e428aeb 10.49MB / 40.48MB 0.6s
#4 sha256:320659737461e071e3d809231861a7487daaa79805c57f97015ff020f34a939a 15.73MB / 23.71MB 0.7s
#4 sha256:1dea7716181a505cea41832dc84691b858a8f64471cb352d8c29cec06e428aeb 25.17MB / 40.48MB 0.7s
#4 sha256:5fb9fa7513e6a72bf7daf0a75e97c441f1ed7ff69c8609d1c429fdf3a6dc846b 79.69MB / 200.85MB 0.8s
#4 sha256:320659737461e071e3d809231861a7487daaa79805c57f97015ff020f34a939a 23.71MB / 23.71MB 0.8s done
#4 sha256:1dea7716181a505cea41832dc84691b858a8f64471cb352d8c29cec06e428aeb 30.41MB / 40.48MB 0.8s
#4 sha256:c9480a4b593fb5abc117a5e01c80d8495c9fd89e743757730c712545f425c9f3 0B / 183B 0.8s
#4 sha256:5fb9fa7513e6a72bf7daf0a75e97c441f1ed7ff69c8609d1c429fdf3a6dc846b 105.91MB / 200.85MB 1.0s
#4 sha256:1dea7716181a505cea41832dc84691b858a8f64471cb352d8c29cec06e428aeb 40.48MB / 40.48MB 1.0s
#4 sha256:c9480a4b593fb5abc117a5e01c80d8495c9fd89e743757730c712545f425c9f3 183B / 183B 0.8s done
#4 sha256:812216efaf878f5ff8086b6efdccec1cb090228107efd62db47d048c927c4f6a 4.33kB / 4.33kB 0.9s done
#4 sha256:4f4fb700ef54461cfa02571ae0db9a0dc1e0cdb5577484a6d75e68dc38e8acc1 32B / 32B 0.9s done
#4 sha256:bb7a0c6ab9c129a399a3c8f034cd0de30406766d61a6694f150b4ab9e64c560c 9.44MB / 214.15MB 1.0s
#4 sha256:5fb9fa7513e6a72bf7daf0a75e97c441f1ed7ff69c8609d1c429fdf3a6dc846b 117.44MB / 200.85MB 1.1s
#4 sha256:1dea7716181a505cea41832dc84691b858a8f64471cb352d8c29cec06e428aeb 40.48MB / 40.48MB 1.0s done
#4 sha256:2c0021742fe2b9491f62c3d89da10492c175081bd17d77efd0f22a298c37ad64 222B / 222B 1.1s done
#4 sha256:5fb9fa7513e6a72bf7daf0a75e97c441f1ed7ff69c8609d1c429fdf3a6dc846b 147.85MB / 200.85MB 1.3s
#4 sha256:bb7a0c6ab9c129a399a3c8f034cd0de30406766d61a6694f150b4ab9e64c560c 39.85MB / 214.15MB 1.3s
#4 sha256:5fb9fa7513e6a72bf7daf0a75e97c441f1ed7ff69c8609d1c429fdf3a6dc846b 161.48MB / 200.85MB 1.4s
#4 sha256:bb7a0c6ab9c129a399a3c8f034cd0de30406766d61a6694f150b4ab9e64c560c 54.53MB / 214.15MB 1.4s
#4 sha256:5fb9fa7513e6a72bf7daf0a75e97c441f1ed7ff69c8609d1c429fdf3a6dc846b 173.02MB / 200.85MB 1.5s
#4 extracting sha256:301a8b74f71f85f3a31e9c7e7fedd5b001ead5bcf895bc2911c1d260e06bd987 1.0s done
#4 extracting sha256:c5c735a83dbd58e1c83f8d52abdc51068e27c00405f53d59802d4954a6b5398a 0.1s
#4 sha256:5fb9fa7513e6a72bf7daf0a75e97c441f1ed7ff69c8609d1c429fdf3a6dc846b 186.21MB / 200.85MB 1.6s
#4 sha256:bb7a0c6ab9c129a399a3c8f034cd0de30406766d61a6694f150b4ab9e64c560c 75.50MB / 214.15MB 1.6s
#4 sha256:5fb9fa7513e6a72bf7daf0a75e97c441f1ed7ff69c8609d1c429fdf3a6dc846b 200.85MB / 200.85MB 1.7s
#4 sha256:bb7a0c6ab9c129a399a3c8f034cd0de30406766d61a6694f150b4ab9e64c560c 97.52MB / 214.15MB 1.8s
#4 sha256:5fb9fa7513e6a72bf7daf0a75e97c441f1ed7ff69c8609d1c429fdf3a6dc846b 200.85MB / 200.85MB 1.9s done
#4 sha256:bb7a0c6ab9c129a399a3c8f034cd0de30406766d61a6694f150b4ab9e64c560c 111.15MB / 214.15MB 1.9s
#4 sha256:bb7a0c6ab9c129a399a3c8f034cd0de30406766d61a6694f150b4ab9e64c560c 144.70MB / 214.15MB 2.1s
#4 sha256:bb7a0c6ab9c129a399a3c8f034cd0de30406766d61a6694f150b4ab9e64c560c 181.40MB / 214.15MB 2.3s
#4 sha256:bb7a0c6ab9c129a399a3c8f034cd0de30406766d61a6694f150b4ab9e64c560c 200.28MB / 214.15MB 2.4s
#4 sha256:bb7a0c6ab9c129a399a3c8f034cd0de30406766d61a6694f150b4ab9e64c560c 214.15MB / 214.15MB 2.5s
#4 extracting sha256:c5c735a83dbd58e1c83f8d52abdc51068e27c00405f53d59802d4954a6b5398a 1.0s done
#4 sha256:bb7a0c6ab9c129a399a3c8f034cd0de30406766d61a6694f150b4ab9e64c560c 214.15MB / 214.15MB 2.9s done
#4 extracting sha256:5fb9fa7513e6a72bf7daf0a75e97c441f1ed7ff69c8609d1c429fdf3a6dc846b
#4 extracting sha256:5fb9fa7513e6a72bf7daf0a75e97c441f1ed7ff69c8609d1c429fdf3a6dc846b 1.5s done
#4 extracting sha256:2af8e2a543d81b57575a2e457bd1e98ffc061b15639dac3be5ff6c2702b9ea1a
#4 extracting sha256:2af8e2a543d81b57575a2e457bd1e98ffc061b15639dac3be5ff6c2702b9ea1a done
#4 extracting sha256:14d68137d870fdc4bc849fbe5c5571ca3e6d9a7b2c5bf1c7e928ccf716dd3b4a 0.1s
#4 extracting sha256:14d68137d870fdc4bc849fbe5c5571ca3e6d9a7b2c5bf1c7e928ccf716dd3b4a 0.3s done
#4 extracting sha256:320659737461e071e3d809231861a7487daaa79805c57f97015ff020f34a939a
#4 extracting sha256:320659737461e071e3d809231861a7487daaa79805c57f97015ff020f34a939a 0.1s done
#4 extracting sha256:1dea7716181a505cea41832dc84691b858a8f64471cb352d8c29cec06e428aeb 0.1s
#4 extracting sha256:1dea7716181a505cea41832dc84691b858a8f64471cb352d8c29cec06e428aeb 1.1s done
#4 extracting sha256:c9480a4b593fb5abc117a5e01c80d8495c9fd89e743757730c712545f425c9f3
#4 extracting sha256:c9480a4b593fb5abc117a5e01c80d8495c9fd89e743757730c712545f425c9f3 done
#4 extracting sha256:812216efaf878f5ff8086b6efdccec1cb090228107efd62db47d048c927c4f6a done
#4 extracting sha256:4f4fb700ef54461cfa02571ae0db9a0dc1e0cdb5577484a6d75e68dc38e8acc1 done
#4 extracting sha256:bb7a0c6ab9c129a399a3c8f034cd0de30406766d61a6694f150b4ab9e64c560c 0.1s
#4 extracting sha256:bb7a0c6ab9c129a399a3c8f034cd0de30406766d61a6694f150b4ab9e64c560c 1.2s done
#4 extracting sha256:2c0021742fe2b9491f62c3d89da10492c175081bd17d77efd0f22a298c37ad64 done
#4 DONE 8.7s

#5 exporting to image
#5 exporting layers done
#5 writing image sha256:a7c38f6c10b31d06aa3348c74cedd5d702f641b17584f44af66ab3859be133d3 done
#5 naming to docker.io/library/example_scala:test done
#5 DONE 0.1s
====================================================================
+/tmp/viash_test_example_scala_15405084999920020089/test_test/test_executable
warning: 1 deprecation
warning: 1 deprecation (since 2.13.3)
warning: 2 deprecations in total; re-run with -deprecation for details
>>> Create input test file
>>> Run executable
warning: 1 deprecation; re-run with -deprecation for details
Copying 'foo.txt' to 'bar.txt'.
>>> Check whether output file exists
>>> Check whether input and output file are the same
>>> Test finished successfully
====================================================================
SUCCESS! All 1 out of 1 test scripts succeeded!
Cleaning up temporary directory

When running viash test, Viash will follow the following steps:

  1. Create a temporary directory
  2. Build the component into the main executable
  3. (Re-)build the Docker image for the component
  4. Iterate over all unit test scripts:
  1. Build the unit test into an executable
  2. Run the unit test, passing the main executable as an argument
  1. Return exit code 0 if all of the above steps succeed, otherwise 0

Bonus: unit testing all of the components

If you have multiple Viash components located in a directory called src/, what happens when you run the following?

viash ns test --parallel --src src/