werkdock/internal/cli/build_test.go

package cli

import (
	"path/filepath"
	"strings"
	"testing"
)

func TestParseBuildTakesDockersFlags(t *testing.T) {
	opts, err := parseBuild([]string{"-f", "docker/Dockerfile.build", "-t", "ghcr.io/example/build:2026.10", "--no-cache", "ctx"})
	if err != nil {
		t.Fatal(err)
	}
	if opts.Dockerfile != "docker/Dockerfile.build" {
		t.Errorf("dockerfile %q", opts.Dockerfile)
	}
	if opts.Tag != "ghcr.io/example/build:2026.10" {
		t.Errorf("tag %q", opts.Tag)
	}
	if opts.Context != "ctx" || !opts.NoCache {
		t.Errorf("context %q, no-cache %v", opts.Context, opts.NoCache)
	}
}

func TestParseBuildDefaultsTheDockerfileToTheContext(t *testing.T) {
	opts, err := parseBuild([]string{"--tag", "built", "/srv/project"})
	if err != nil {
		t.Fatal(err)
	}
	if want := filepath.Join("/srv/project", "Dockerfile"); opts.Dockerfile != want {
		t.Errorf("dockerfile %q, want %q", opts.Dockerfile, want)
	}
}

func TestParseBuildRefusesLoudly(t *testing.T) {
	tests := []struct {
		name    string
		args    []string
		wantErr string
	}{
		{"no context", []string{"-t", "x"}, "needs a CONTEXT"},
		{"no tag", []string{"ctx"}, "-t REPOSITORY"},
		{"two tags", []string{"-t", "a", "-t", "b", "ctx"}, "one -t per build"},
		{"an invalid reference", []string{"-t", "Not A Ref", "ctx"}, "invalid"},
		{"a second argument", []string{"-t", "x", "ctx", "extra"}, `unexpected argument "extra"`},
		{"a Dockerfile on stdin", []string{"-t", "x", "-"}, "needs no context"},
		{"--build-arg", []string{"-t", "x", "--build-arg", "V=1", "ctx"}, "stage 2 of RFC 0006"},
		{"--target", []string{"-t", "x", "--target", "builder", "ctx"}, "stage 3 of RFC 0006"},
		{"--platform", []string{"-t", "x", "--platform", "linux/arm64", "ctx"}, "host's platform"},
		{"--secret", []string{"-t", "x", "--secret", "id=a", "ctx"}, "CapEff is 0"},
		{"--cache-from", []string{"-t", "x", "--cache-from", "a", "ctx"}, "no layer cache"},
		{"--squash", []string{"-t", "x", "--squash", "ctx"}, "one flat tree already"},
		{"--push", []string{"-t", "x", "--push", "ctx"}, "no push verb"},
		{"an unknown flag", []string{"-t", "x", "--frobnicate", "ctx"}, "flag provided but not defined"},
	}
	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			_, err := parseBuild(tt.args)
			if err == nil || !strings.Contains(err.Error(), tt.wantErr) {
				t.Errorf("got %v, want it to contain %q", err, tt.wantErr)
			}
		})
	}
}