krust/tests/integration_test.rs

use anyhow::Result;
use assert_cmd::Command;
use predicates::prelude::*;
use std::env;
use std::process::Command as StdCommand;

// Helper to get the appropriate test platform based on architecture
fn get_test_platform() -> &'static str {
    // Always test linux/amd64 as it's universally available in our CI
    "linux/amd64"
}

#[test]
fn test_version_command() -> Result<()> {
    let mut cmd = Command::cargo_bin("krust")?;
    cmd.arg("--version");
    cmd.assert()
        .success()
        .stdout(predicate::str::contains("krust 0.1.0"));
    Ok(())
}

#[test]
fn test_version_subcommand() -> Result<()> {
    let mut cmd = Command::cargo_bin("krust")?;
    cmd.arg("version");
    cmd.assert()
        .success()
        .stdout(predicate::str::contains("krust 0.1.0"));
    Ok(())
}

#[test]
fn test_help_command() -> Result<()> {
    let mut cmd = Command::cargo_bin("krust")?;
    cmd.arg("--help");
    cmd.assert().success().stdout(predicate::str::contains(
        "A container image build tool for Rust applications",
    ));
    Ok(())
}

#[test]
fn test_build_help() -> Result<()> {
    let mut cmd = Command::cargo_bin("krust")?;
    cmd.arg("build").arg("--help");
    cmd.assert().success().stdout(predicate::str::contains(
        "Build a container image from a Rust application",
    ));
    Ok(())
}

#[test]
fn test_build_requires_repo_or_image() -> Result<()> {
    // Use the example directory
    let example_dir = env::current_dir()?.join("example").join("hello-krust");

    // Run krust build without KRUST_REPO or --image
    let mut cmd = Command::cargo_bin("krust")?;
    cmd.arg("build")
        .arg("--no-push")
        .arg(".") // Explicitly pass current directory
        .current_dir(&example_dir)
        .env_remove("KRUST_REPO");

    cmd.assert().failure().stderr(predicate::str::contains(
        "Either --image or KRUST_REPO must be set",
    ));
    Ok(())
}

#[test]
fn test_build_with_krust_repo_env() -> Result<()> {
    // Use the example directory
    let example_dir = env::current_dir()?.join("example").join("hello-krust");

    // Run krust build with KRUST_REPO env var
    let mut cmd = Command::cargo_bin("krust")?;
    cmd.arg("build")
        .arg("--no-push")
        .arg("--platform")
        .arg(get_test_platform())
        .arg(".") // Explicitly pass current directory
        .env("KRUST_REPO", "test.local")
        .current_dir(&example_dir);

    cmd.assert()
        .success()
        .stderr(predicate::str::contains("Building Rust project"))
        .stderr(predicate::str::contains(
            "Successfully built image for 1 platform(s)",
        ));
    Ok(())
}

#[test]
fn test_command_substitution_syntax() -> Result<()> {
    // Get the example project directory
    let example_dir = env::current_dir()?.join("example").join("hello-krust");

    // Test that output is clean for command substitution
    let mut cmd = Command::cargo_bin("krust")?;
    let output = cmd
        .arg("build")
        .arg("--no-push")
        .arg("--platform")
        .arg(get_test_platform())
        .arg("--image")
        .arg("test.local/hello:latest")
        .arg(".") // Explicitly pass current directory
        .current_dir(&example_dir)
        .output()?;

    // Stdout should be empty when --no-push is used
    let stdout = String::from_utf8_lossy(&output.stdout);
    assert!(
        stdout.trim().is_empty(),
        "Stdout should be empty with --no-push"
    );

    // Stderr should contain log messages
    let stderr = String::from_utf8_lossy(&output.stderr);
    assert!(stderr.contains("Building Rust project"));
    assert!(stderr.contains("Successfully built image"));
    Ok(())
}

#[test]
fn test_verbose_logging() -> Result<()> {
    let example_dir = env::current_dir()?.join("example").join("hello-krust");

    let mut cmd = Command::cargo_bin("krust")?;
    cmd.arg("--verbose")
        .arg("build")
        .arg("--no-push")
        .arg("--platform")
        .arg(get_test_platform())
        .arg("--image")
        .arg("test.local/hello:latest")
        .arg(".") // Explicitly pass current directory
        .current_dir(&example_dir);

    cmd.assert()
        .success()
        .stderr(predicate::str::contains("DEBUG"));
    Ok(())
}

#[test]
fn test_full_build_and_run_workflow() -> Result<()> {
    // This test requires Docker
    let docker_check = StdCommand::new("docker").arg("version").output();
    match docker_check {
        Ok(output) if output.status.success() => {
            // Docker is available, proceed with test
        }
        _ => {
            // Docker not available or not working
            panic!("Docker is required for this test but is not available");
        }
    }

    // Get the example project directory
    let example_dir = env::current_dir()?.join("example").join("hello-krust");

    // Build and push to ttl.sh
    let mut cmd = Command::cargo_bin("krust")?;
    let output = cmd
        .arg("build")
        .arg("--platform")
        .arg(get_test_platform())
        .arg(".") // Explicitly pass current directory
        .env("KRUST_REPO", "ttl.sh/krust-test")
        .current_dir(&example_dir)
        .output()?;

    assert!(output.status.success(), "Build failed");

    // Get the image reference from stdout
    let image_ref = String::from_utf8_lossy(&output.stdout).trim().to_string();
    assert!(image_ref.starts_with("ttl.sh/krust-test/hello-krust@sha256:"));

    // Try to run the image
    let docker_output = StdCommand::new("docker")
        .args(&["run", "--rm", &image_ref])
        .output()?;

    assert!(docker_output.status.success(), "Docker run failed");
    let docker_stdout = String::from_utf8_lossy(&docker_output.stdout);
    assert!(docker_stdout.contains("Hello from krust example!"));
    Ok(())
}

#[test]
fn test_single_platform_build() -> Result<()> {
    let example_dir = env::current_dir()?.join("example").join("hello-krust");
    let platform = get_test_platform();

    let mut cmd = Command::cargo_bin("krust")?;
    cmd.arg("build")
        .arg("--no-push")
        .arg("--platform")
        .arg(platform)
        .arg("--image")
        .arg("test.local/single-platform:latest")
        .arg(".")
        .current_dir(&example_dir);

    cmd.assert()
        .success()
        .stderr(predicate::str::contains(format!(
            "Building for platform: {}",
            platform
        )))
        .stderr(predicate::str::contains(
            "Successfully built image for 1 platform(s)",
        ));
    Ok(())
}

#[test]
fn test_multi_platform_build() -> Result<()> {
    let example_dir = env::current_dir()?.join("example").join("hello-krust");
    let mut cmd = Command::cargo_bin("krust")?;

    // Test building for multiple platforms
    // This will use whatever targets are available
    cmd.arg("build")
        .arg("--no-push")
        .arg("--platform")
        .arg("linux/amd64,linux/arm64")
        .arg("--image")
        .arg("test.local/multi-platform:latest")
        .arg(".")
        .current_dir(&example_dir);

    // The command might fail if targets aren't installed, but we should test that it tries
    let output = cmd.output()?;

    if output.status.success() {
        // If it succeeds, verify we built for multiple platforms
        let stderr = String::from_utf8_lossy(&output.stderr);
        assert!(stderr.contains("Building for platform: linux/amd64"));
        assert!(stderr.contains("Building for platform: linux/arm64"));
        assert!(stderr.contains("Successfully built image for 2 platform(s)"));
    } else {
        // If it fails, it should be because of missing targets
        let stderr = String::from_utf8_lossy(&output.stderr);
        assert!(
            stderr.contains("target may not be installed")
                || stderr.contains("linker")
                || stderr.contains("cross-compilation")
                || stderr.contains("not found"),
            "Build failed for unexpected reason: {}",
            stderr
        );
    }
    Ok(())
}