dockerimg/dockerimg_test.go - sketch - Gitiles

 package dockerimg

 import (
 	"cmp"
 	"context"
 	"flag"
 	"io/fs"
 	"net/http"
 	"os"
 	"path/filepath"
 	"strings"
 	"testing"
 	"testing/fstest"

 	gcmp "github.com/google/go-cmp/cmp"
 	"sketch.dev/httprr"
 	"sketch.dev/llm/ant"
 )

 var flagRewriteWant = flag.Bool("rewritewant", false, "rewrite the dockerfiles we want from the model")

 func TestCreateDockerfile(t *testing.T) {
 	ctx := context.Background()

 	tests := []struct {
 		name string
 		fsys fs.FS
 	}{
 		{
 			name: "Basic repo with README",
 			fsys: fstest.MapFS{
 				"README.md": &fstest.MapFile{Data: []byte("# Test Project\nA Go project for testing.")},
 			},
 		},
 		{
 			// TODO: this looks bogus.
 			name: "Repo with README and workflow",
 			fsys: fstest.MapFS{
 				"README.md": &fstest.MapFile{Data: []byte("# Test Project\nA Go project for testing.")},
 				".github/workflows/test.yml": &fstest.MapFile{Data: []byte(`name: Test
 on: [push]
 jobs:
   test:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
       - uses: actions/setup-node@v3
         with:
           node-version: '18'
       - name: Install and activate corepack
         run: |
           npm install -g corepack
           corepack enable
       - run: go test ./...`)},
 			},
 		},
 		{
 			name: "mention a devtool in the readme",
 			fsys: fstest.MapFS{
 				"readme.md": &fstest.MapFile{Data: []byte("# Test Project\nYou must install `dot` to run the tests.")},
 			},
 		},
 		{
 			name: "empty repo",
 			fsys: fstest.MapFS{
 				"main.go": &fstest.MapFile{Data: []byte("package main\n\nfunc main() {}")},
 			},
 		},
 		{
 			name: "python misery",
 			fsys: fstest.MapFS{
 				"README.md": &fstest.MapFile{Data: []byte("# Our amazing repo\n\nTo use this project you need python 3.11 and the dvc tool")},
 			},
 		},
 	}

 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
 			basePath := "testdata/" + strings.ToLower(strings.Replace(t.Name(), "/", "_", -1))
 			rrPath := basePath + ".httprr"
 			rr, err := httprr.Open(rrPath, http.DefaultTransport)
 			if err != nil && !os.IsNotExist(err) {
 				t.Fatal(err)
 			}
 			rr.ScrubReq(func(req *http.Request) error {
 				req.Header.Del("x-api-key")
 				return nil
 			})
 			initFiles, err := readInitFiles(tt.fsys)
 			if err != nil {
 				t.Fatal(err)
 			}
 			apiKey := cmp.Or(os.Getenv("OUTER_SKETCH_MODEL_API_KEY"), os.Getenv("ANTHROPIC_API_KEY"))
 			srv := &ant.Service{
 				APIKey: apiKey,
 				HTTPC:  rr.Client(),
 			}
 			result, err := createDockerfile(ctx, srv, initFiles, "", false)
 			if err != nil {
 				t.Fatal(err)
 			}

 			wantPath := basePath + ".dockerfile"

 			if *flagRewriteWant {
 				if err := os.WriteFile(wantPath, []byte(result), 0o666); err != nil {
 					t.Fatal(err)
 				}
 				return
 			}

 			wantBytes, err := os.ReadFile(wantPath)
 			if err != nil {
 				t.Fatal(err)
 			}
 			want := string(wantBytes)
 			if diff := gcmp.Diff(want, result); diff != "" {
 				t.Errorf("dockerfile does not match. got:\n----\n%s\n----\n\ndiff: %s", result, diff)
 			}
 		})
 	}
 }

 func TestReadInitFiles(t *testing.T) {
 	testFS := fstest.MapFS{
 		"README.md":                  &fstest.MapFile{Data: []byte("# Test Repo")},
 		".github/workflows/test.yml": &fstest.MapFile{Data: []byte("name: Test Workflow")},
 		"main.go":                    &fstest.MapFile{Data: []byte("package main")},
 		".git/HEAD":                  &fstest.MapFile{Data: []byte("ref: refs/heads/main")},
 		"random/README.md":           &fstest.MapFile{Data: []byte("ignore me")},
 	}

 	files, err := readInitFiles(testFS)
 	if err != nil {
 		t.Fatalf("readInitFiles failed: %v", err)
 	}

 	// Should have 2 files: README.md and .github/workflows/test.yml
 	if len(files) != 2 {
 		t.Errorf("Expected 2 files, got %d", len(files))
 	}

 	if content, ok := files["README.md"]; !ok {
 		t.Error("README.md not found")
 	} else if content != "# Test Repo" {
 		t.Errorf("README.md has incorrect content: %q", content)
 	}

 	if content, ok := files[".github/workflows/test.yml"]; !ok {
 		t.Error(".github/workflows/test.yml not found")
 	} else if content != "name: Test Workflow" {
 		t.Errorf("Workflow file has incorrect content: %q", content)
 	}

 	if _, ok := files["main.go"]; ok {
 		t.Error("main.go should not be included")
 	}

 	if _, ok := files[".git/HEAD"]; ok {
 		t.Error(".git/HEAD should not be included")
 	}
 }

 func TestReadInitFilesWithSubdir(t *testing.T) {
 	// Create a file system with files in a subdirectory
 	testFS := fstest.MapFS{
 		"subdir/README.md":                  &fstest.MapFile{Data: []byte("# Test Repo")},
 		"subdir/.github/workflows/test.yml": &fstest.MapFile{Data: []byte("name: Test Workflow")},
 		"subdir/main.go":                    &fstest.MapFile{Data: []byte("package main")},
 	}

 	// Use fs.Sub to get a sub-filesystem
 	subFS, err := fs.Sub(testFS, "subdir")
 	if err != nil {
 		t.Fatalf("fs.Sub failed: %v", err)
 	}

 	files, err := readInitFiles(subFS)
 	if err != nil {
 		t.Fatalf("readInitFiles failed: %v", err)
 	}

 	// Should have 2 files: README.md and .github/workflows/test.yml
 	if len(files) != 2 {
 		t.Errorf("Expected 2 files, got %d", len(files))
 	}

 	// Verify README.md was found
 	if content, ok := files["README.md"]; !ok {
 		t.Error("README.md not found")
 	} else if content != "# Test Repo" {
 		t.Errorf("README.md has incorrect content: %q", content)
 	}

 	// Verify workflow file was found
 	if content, ok := files[".github/workflows/test.yml"]; !ok {
 		t.Error(".github/workflows/test.yml not found")
 	} else if content != "name: Test Workflow" {
 		t.Errorf("Workflow file has incorrect content: %q", content)
 	}
 }

 // TestDockerHashIsPushed ensures that any changes made to the
 // dockerfile template have been pushed to the default image.
 func TestDockerHashIsPushed(t *testing.T) {
 	name, _, tag := DefaultImage()

 	if err := checkTagExists(tag); err != nil {
 		if strings.Contains(err.Error(), "not found") {
 			t.Fatalf(`Currently released docker image %s does not match dockerfileCustomTmpl.

 Inspecting the docker image shows the current hash of dockerfileBase is %s,
 but it is not published in the GitHub container registry.

 This means the template constants in createdockerfile.go have been
 edited (e.g. dockerfileBase changed), but a new version
 of the public default docker image has not been built and pushed.

 To do so:

 	go run ./dockerimg/pushdockerimg.go

 `, name, tag)
 		} else {
 			t.Fatalf("checkTagExists: %v", err)
 		}
 	}
 }

 func TestGetHostGoCacheDirs(t *testing.T) {
 	ctx := context.Background()

 	// Test getHostGoCacheDir
 	goCacheDir, err := getHostGoCacheDir(ctx)
 	if err != nil {
 		t.Fatalf("getHostGoCacheDir failed: %v", err)
 	}
 	if goCacheDir == "" {
 		t.Fatal("getHostGoCacheDir returned empty string")
 	}
 	t.Logf("GOCACHE: %s", goCacheDir)

 	// Test getHostGoModCacheDir
 	goModCacheDir, err := getHostGoModCacheDir(ctx)
 	if err != nil {
 		t.Fatalf("getHostGoModCacheDir failed: %v", err)
 	}
 	if goModCacheDir == "" {
 		t.Fatal("getHostGoModCacheDir returned empty string")
 	}
 	t.Logf("GOMODCACHE: %s", goModCacheDir)

 	// Both should be absolute paths
 	if !filepath.IsAbs(goCacheDir) {
 		t.Errorf("GOCACHE is not an absolute path: %s", goCacheDir)
 	}
 	if !filepath.IsAbs(goModCacheDir) {
 		t.Errorf("GOMODCACHE is not an absolute path: %s", goModCacheDir)
 	}
 }

 func TestPrioritizeDockerfiles(t *testing.T) {
 	tests := []struct {
 		name       string
 		candidates []string
 		want       string
 	}{
 		{
 			name:       "empty list",
 			candidates: []string{},
 			want:       "",
 		},
 		{
 			name:       "single dockerfile",
 			candidates: []string{"/path/to/Dockerfile"},
 			want:       "/path/to/Dockerfile",
 		},
 		{
 			name:       "dockerfile.sketch preferred over dockerfile",
 			candidates: []string{"/path/to/Dockerfile", "/path/to/Dockerfile.sketch"},
 			want:       "/path/to/Dockerfile.sketch",
 		},
 		{
 			name:       "dockerfile.sketch preferred regardless of order",
 			candidates: []string{"/path/to/Dockerfile.dev", "/path/to/Dockerfile", "/path/to/Dockerfile.sketch"},
 			want:       "/path/to/Dockerfile.sketch",
 		},
 		{
 			name:       "dockerfile preferred over other variations",
 			candidates: []string{"/path/to/Dockerfile.dev", "/path/to/Dockerfile", "/path/to/Dockerfile.prod"},
 			want:       "/path/to/Dockerfile",
 		},
 		{
 			name:       "case insensitive dockerfile.sketch",
 			candidates: []string{"/path/to/dockerfile", "/path/to/dockerfile.sketch"},
 			want:       "/path/to/dockerfile.sketch",
 		},
 		{
 			name:       "case insensitive dockerfile",
 			candidates: []string{"/path/to/dockerfile.dev", "/path/to/dockerfile"},
 			want:       "/path/to/dockerfile",
 		},
 		{
 			name:       "first candidate when no priority matches",
 			candidates: []string{"/path/to/Dockerfile.dev", "/path/to/Dockerfile.prod"},
 			want:       "/path/to/Dockerfile.dev",
 		},
 	}

 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
 			got := prioritizeDockerfiles(tt.candidates)
 			if got != tt.want {
 				t.Errorf("prioritizeDockerfiles() = %v, want %v", got, tt.want)
 			}
 		})
 	}
 }

 func TestFindDirDockerfilesIntegration(t *testing.T) {
 	// Create a temporary directory structure for testing
 	tmpDir, err := os.MkdirTemp("", "dockerfiles-test-*")
 	if err != nil {
 		t.Fatal(err)
 	}
 	defer os.RemoveAll(tmpDir)

 	// Create test files
 	testFiles := []string{
 		"Dockerfile",
 		"Dockerfile.sketch",
 		"Dockerfile.dev",
 		"dockerfile.prod", // lowercase
 		"README.md",       // should be ignored
 	}

 	for _, file := range testFiles {
 		path := filepath.Join(tmpDir, file)
 		if err := os.WriteFile(path, []byte("# test"), 0o644); err != nil {
 			t.Fatal(err)
 		}
 	}

 	// Test findDirDockerfiles
 	candidates, err := findDirDockerfiles(tmpDir)
 	if err != nil {
 		t.Fatal(err)
 	}

 	// Should find all Dockerfile* files but not README.md
 	expectedCount := 4
 	if len(candidates) != expectedCount {
 		t.Errorf("findDirDockerfiles() found %d files, want %d", len(candidates), expectedCount)
 	}

 	// Test prioritization
 	prioritized := prioritizeDockerfiles(candidates)
 	expectedPriority := filepath.Join(tmpDir, "Dockerfile.sketch")
 	if prioritized != expectedPriority {
 		t.Errorf("prioritizeDockerfiles() = %v, want %v", prioritized, expectedPriority)
 	}

 	// Test with only Dockerfile (no Dockerfile.sketch)
 	os.Remove(filepath.Join(tmpDir, "Dockerfile.sketch"))
 	candidates, err = findDirDockerfiles(tmpDir)
 	if err != nil {
 		t.Fatal(err)
 	}
 	prioritized = prioritizeDockerfiles(candidates)
 	expectedPriority = filepath.Join(tmpDir, "Dockerfile")
 	if prioritized != expectedPriority {
 		t.Errorf("prioritizeDockerfiles() without sketch = %v, want %v", prioritized, expectedPriority)
 	}
 }

 func TestFindRepoDockerfiles(t *testing.T) {
 	// Create a temporary directory structure that simulates a git repo
 	tmpDir, err := os.MkdirTemp("", "repo-test-*")
 	if err != nil {
 		t.Fatal(err)
 	}
 	defer os.RemoveAll(tmpDir)

 	// Create subdirectories
 	subDir := filepath.Join(tmpDir, "subdir")
 	if err := os.MkdirAll(subDir, 0o755); err != nil {
 		t.Fatal(err)
 	}

 	// Create Dockerfile in subdirectory
 	subDockerfile := filepath.Join(subDir, "Dockerfile")
 	if err := os.WriteFile(subDockerfile, []byte("FROM ubuntu"), 0o644); err != nil {
 		t.Fatal(err)
 	}

 	// Create Dockerfile.sketch in parent directory
 	rootSketchDockerfile := filepath.Join(tmpDir, "Dockerfile.sketch")
 	if err := os.WriteFile(rootSketchDockerfile, []byte("FROM alpine"), 0o644); err != nil {
 		t.Fatal(err)
 	}

 	// Test: when called from subdirectory, should find subdirectory Dockerfile first
 	candidates, err := findRepoDockerfiles(subDir, tmpDir)
 	if err != nil {
 		t.Fatal(err)
 	}

 	if len(candidates) == 0 {
 		t.Fatal("expected to find at least one dockerfile")
 	}

 	// Should find the Dockerfile in the subdirectory
 	if len(candidates) != 1 || candidates[0] != subDockerfile {
 		t.Errorf("expected to find %s, but got %v", subDockerfile, candidates)
 	}

 	// Test: when called from root with no subdirectory dockerfile, should find root dockerfile
 	os.Remove(subDockerfile) // Remove subdirectory dockerfile
 	candidates, err = findRepoDockerfiles(tmpDir, tmpDir)
 	if err != nil {
 		t.Fatal(err)
 	}

 	if len(candidates) != 1 || candidates[0] != rootSketchDockerfile {
 		t.Errorf("expected to find %s, but got %v", rootSketchDockerfile, candidates)
 	}

 	// Test prioritization: create both Dockerfile and Dockerfile.sketch in same directory
 	rootDockerfile := filepath.Join(tmpDir, "Dockerfile")
 	if err := os.WriteFile(rootDockerfile, []byte("FROM debian"), 0o644); err != nil {
 		t.Fatal(err)
 	}

 	candidates, err = findRepoDockerfiles(tmpDir, tmpDir)
 	if err != nil {
 		t.Fatal(err)
 	}

 	if len(candidates) != 2 {
 		t.Errorf("expected to find 2 dockerfiles, but got %d", len(candidates))
 	}

 	// Test that prioritization works correctly
 	prioritized := prioritizeDockerfiles(candidates)
 	if prioritized != rootSketchDockerfile {
 		t.Errorf("expected Dockerfile.sketch to be prioritized, but got %s", prioritized)
 	}
 }

 // TestDockerfileSketchImageReuse tests that Docker images built from Dockerfile.sketch
 // are properly reused when the Dockerfile content hasn't changed.
 func TestDockerfileSketchImageReuse(t *testing.T) {
 	// Create a temporary directory for the test repo
 	tmpDir := t.TempDir()

 	// Create a simple Dockerfile.sketch
 	dockerfileContent := `FROM ubuntu:24.04
 LABEL test=true
 CMD ["echo", "hello"]
 `
 	dockerfilePath := filepath.Join(tmpDir, "Dockerfile.sketch")
 	err := os.WriteFile(dockerfilePath, []byte(dockerfileContent), 0o644)
 	if err != nil {
 		t.Fatalf("Failed to write Dockerfile.sketch: %v", err)
 	}

 	// Test that hashInitFiles produces consistent results
 	initFiles := map[string]string{
 		dockerfilePath: dockerfileContent,
 	}
 	hash1 := hashInitFiles(initFiles)
 	hash2 := hashInitFiles(initFiles)

 	if hash1 != hash2 {
 		t.Errorf("hashInitFiles should be deterministic, got %s and %s", hash1, hash2)
 	}

 	// Test that hash changes when content changes
 	modifiedFiles := map[string]string{
 		dockerfilePath: dockerfileContent + "RUN echo modified\n",
 	}
 	hash3 := hashInitFiles(modifiedFiles)

 	if hash1 == hash3 {
 		t.Errorf("hashInitFiles should produce different hashes for different content, got %s for both", hash1)
 	}

 	t.Logf("Original hash: %s", hash1)
 	t.Logf("Modified hash: %s", hash3)
 }

 // TestPrioritizeDockerfiles tests the Dockerfile prioritization logic
 func TestDockerfileSketchPriority(t *testing.T) {
 	tests := []struct {
 		name       string
 		candidates []string
 		expected   string
 	}{
 		{
 			name:       "dockerfile.sketch_wins_over_dockerfile",
 			candidates: []string{"/path/Dockerfile", "/path/Dockerfile.sketch"},
 			expected:   "/path/Dockerfile.sketch",
 		},
 		{
 			name:       "dockerfile.sketch_case_insensitive",
 			candidates: []string{"/path/dockerfile", "/path/dockerfile.sketch"},
 			expected:   "/path/dockerfile.sketch",
 		},
 		{
 			name:       "dockerfile_wins_over_variations",
 			candidates: []string{"/path/Dockerfile.dev", "/path/Dockerfile"},
 			expected:   "/path/Dockerfile",
 		},
 	}

 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
 			result := prioritizeDockerfiles(tt.candidates)
 			if result != tt.expected {
 				t.Errorf("prioritizeDockerfiles(%v) = %s, want %s", tt.candidates, result, tt.expected)
 			}
 		})
 	}
 }
	package dockerimg

	import (
	"cmp"
	"context"
	"flag"
	"io/fs"
	"net/http"
	"os"
	"path/filepath"
	"strings"
	"testing"
	"testing/fstest"

	gcmp "github.com/google/go-cmp/cmp"
	"sketch.dev/httprr"
	"sketch.dev/llm/ant"
	)

	var flagRewriteWant = flag.Bool("rewritewant", false, "rewrite the dockerfiles we want from the model")

	func TestCreateDockerfile(t *testing.T) {
	ctx := context.Background()

	tests := []struct {
	name string
	fsys fs.FS
	}{
	{
	name: "Basic repo with README",
	fsys: fstest.MapFS{
	"README.md": &fstest.MapFile{Data: []byte("# Test Project\nA Go project for testing.")},
	},
	},
	{
	// TODO: this looks bogus.
	name: "Repo with README and workflow",
	fsys: fstest.MapFS{
	"README.md": &fstest.MapFile{Data: []byte("# Test Project\nA Go project for testing.")},
	".github/workflows/test.yml": &fstest.MapFile{Data: []byte(`name: Test
	on: [push]
	jobs:
	test:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v2
	- uses: actions/setup-node@v3
	with:
	node-version: '18'
	- name: Install and activate corepack
	run: \|
	npm install -g corepack
	corepack enable
	- run: go test ./...`)},
	},
	},
	{
	name: "mention a devtool in the readme",
	fsys: fstest.MapFS{
	"readme.md": &fstest.MapFile{Data: []byte("# Test Project\nYou must install `dot` to run the tests.")},
	},
	},
	{
	name: "empty repo",
	fsys: fstest.MapFS{
	"main.go": &fstest.MapFile{Data: []byte("package main\n\nfunc main() {}")},
	},
	},
	{
	name: "python misery",
	fsys: fstest.MapFS{
	"README.md": &fstest.MapFile{Data: []byte("# Our amazing repo\n\nTo use this project you need python 3.11 and the dvc tool")},
	},
	},
	}

	for _, tt := range tests {
	t.Run(tt.name, func(t *testing.T) {
	basePath := "testdata/" + strings.ToLower(strings.Replace(t.Name(), "/", "_", -1))
	rrPath := basePath + ".httprr"
	rr, err := httprr.Open(rrPath, http.DefaultTransport)
	if err != nil && !os.IsNotExist(err) {
	t.Fatal(err)
	}
	rr.ScrubReq(func(req *http.Request) error {
	req.Header.Del("x-api-key")
	return nil
	})
	initFiles, err := readInitFiles(tt.fsys)
	if err != nil {
	t.Fatal(err)
	}
	apiKey := cmp.Or(os.Getenv("OUTER_SKETCH_MODEL_API_KEY"), os.Getenv("ANTHROPIC_API_KEY"))
	srv := &ant.Service{
	APIKey: apiKey,
	HTTPC: rr.Client(),
	}
	result, err := createDockerfile(ctx, srv, initFiles, "", false)
	if err != nil {
	t.Fatal(err)
	}

	wantPath := basePath + ".dockerfile"

	if *flagRewriteWant {
	if err := os.WriteFile(wantPath, []byte(result), 0o666); err != nil {
	t.Fatal(err)
	}
	return
	}

	wantBytes, err := os.ReadFile(wantPath)
	if err != nil {
	t.Fatal(err)
	}
	want := string(wantBytes)
	if diff := gcmp.Diff(want, result); diff != "" {
	t.Errorf("dockerfile does not match. got:\n----\n%s\n----\n\ndiff: %s", result, diff)
	}
	})
	}
	}

	func TestReadInitFiles(t *testing.T) {
	testFS := fstest.MapFS{
	"README.md": &fstest.MapFile{Data: []byte("# Test Repo")},
	".github/workflows/test.yml": &fstest.MapFile{Data: []byte("name: Test Workflow")},
	"main.go": &fstest.MapFile{Data: []byte("package main")},
	".git/HEAD": &fstest.MapFile{Data: []byte("ref: refs/heads/main")},
	"random/README.md": &fstest.MapFile{Data: []byte("ignore me")},
	}

	files, err := readInitFiles(testFS)
	if err != nil {
	t.Fatalf("readInitFiles failed: %v", err)
	}

	// Should have 2 files: README.md and .github/workflows/test.yml
	if len(files) != 2 {
	t.Errorf("Expected 2 files, got %d", len(files))
	}

	if content, ok := files["README.md"]; !ok {
	t.Error("README.md not found")
	} else if content != "# Test Repo" {
	t.Errorf("README.md has incorrect content: %q", content)
	}

	if content, ok := files[".github/workflows/test.yml"]; !ok {
	t.Error(".github/workflows/test.yml not found")
	} else if content != "name: Test Workflow" {
	t.Errorf("Workflow file has incorrect content: %q", content)
	}

	if _, ok := files["main.go"]; ok {
	t.Error("main.go should not be included")
	}

	if _, ok := files[".git/HEAD"]; ok {
	t.Error(".git/HEAD should not be included")
	}
	}

	func TestReadInitFilesWithSubdir(t *testing.T) {
	// Create a file system with files in a subdirectory
	testFS := fstest.MapFS{
	"subdir/README.md": &fstest.MapFile{Data: []byte("# Test Repo")},
	"subdir/.github/workflows/test.yml": &fstest.MapFile{Data: []byte("name: Test Workflow")},
	"subdir/main.go": &fstest.MapFile{Data: []byte("package main")},
	}

	// Use fs.Sub to get a sub-filesystem
	subFS, err := fs.Sub(testFS, "subdir")
	if err != nil {
	t.Fatalf("fs.Sub failed: %v", err)
	}

	files, err := readInitFiles(subFS)
	if err != nil {
	t.Fatalf("readInitFiles failed: %v", err)
	}

	// Should have 2 files: README.md and .github/workflows/test.yml
	if len(files) != 2 {
	t.Errorf("Expected 2 files, got %d", len(files))
	}

	// Verify README.md was found
	if content, ok := files["README.md"]; !ok {
	t.Error("README.md not found")
	} else if content != "# Test Repo" {
	t.Errorf("README.md has incorrect content: %q", content)
	}

	// Verify workflow file was found
	if content, ok := files[".github/workflows/test.yml"]; !ok {
	t.Error(".github/workflows/test.yml not found")
	} else if content != "name: Test Workflow" {
	t.Errorf("Workflow file has incorrect content: %q", content)
	}
	}

	// TestDockerHashIsPushed ensures that any changes made to the
	// dockerfile template have been pushed to the default image.
	func TestDockerHashIsPushed(t *testing.T) {
	name, _, tag := DefaultImage()

	if err := checkTagExists(tag); err != nil {
	if strings.Contains(err.Error(), "not found") {
	t.Fatalf(`Currently released docker image %s does not match dockerfileCustomTmpl.

	Inspecting the docker image shows the current hash of dockerfileBase is %s,
	but it is not published in the GitHub container registry.

	This means the template constants in createdockerfile.go have been
	edited (e.g. dockerfileBase changed), but a new version
	of the public default docker image has not been built and pushed.

	To do so:

	go run ./dockerimg/pushdockerimg.go

	`, name, tag)
	} else {
	t.Fatalf("checkTagExists: %v", err)
	}
	}
	}

	func TestGetHostGoCacheDirs(t *testing.T) {
	ctx := context.Background()

	// Test getHostGoCacheDir
	goCacheDir, err := getHostGoCacheDir(ctx)
	if err != nil {
	t.Fatalf("getHostGoCacheDir failed: %v", err)
	}
	if goCacheDir == "" {
	t.Fatal("getHostGoCacheDir returned empty string")
	}
	t.Logf("GOCACHE: %s", goCacheDir)

	// Test getHostGoModCacheDir
	goModCacheDir, err := getHostGoModCacheDir(ctx)
	if err != nil {
	t.Fatalf("getHostGoModCacheDir failed: %v", err)
	}
	if goModCacheDir == "" {
	t.Fatal("getHostGoModCacheDir returned empty string")
	}
	t.Logf("GOMODCACHE: %s", goModCacheDir)

	// Both should be absolute paths
	if !filepath.IsAbs(goCacheDir) {
	t.Errorf("GOCACHE is not an absolute path: %s", goCacheDir)
	}
	if !filepath.IsAbs(goModCacheDir) {
	t.Errorf("GOMODCACHE is not an absolute path: %s", goModCacheDir)
	}
	}

	func TestPrioritizeDockerfiles(t *testing.T) {
	tests := []struct {
	name string
	candidates []string
	want string
	}{
	{
	name: "empty list",
	candidates: []string{},
	want: "",
	},
	{
	name: "single dockerfile",
	candidates: []string{"/path/to/Dockerfile"},
	want: "/path/to/Dockerfile",
	},
	{
	name: "dockerfile.sketch preferred over dockerfile",
	candidates: []string{"/path/to/Dockerfile", "/path/to/Dockerfile.sketch"},
	want: "/path/to/Dockerfile.sketch",
	},
	{
	name: "dockerfile.sketch preferred regardless of order",
	candidates: []string{"/path/to/Dockerfile.dev", "/path/to/Dockerfile", "/path/to/Dockerfile.sketch"},
	want: "/path/to/Dockerfile.sketch",
	},
	{
	name: "dockerfile preferred over other variations",
	candidates: []string{"/path/to/Dockerfile.dev", "/path/to/Dockerfile", "/path/to/Dockerfile.prod"},
	want: "/path/to/Dockerfile",
	},
	{
	name: "case insensitive dockerfile.sketch",
	candidates: []string{"/path/to/dockerfile", "/path/to/dockerfile.sketch"},
	want: "/path/to/dockerfile.sketch",
	},
	{
	name: "case insensitive dockerfile",
	candidates: []string{"/path/to/dockerfile.dev", "/path/to/dockerfile"},
	want: "/path/to/dockerfile",
	},
	{
	name: "first candidate when no priority matches",
	candidates: []string{"/path/to/Dockerfile.dev", "/path/to/Dockerfile.prod"},
	want: "/path/to/Dockerfile.dev",
	},
	}

	for _, tt := range tests {
	t.Run(tt.name, func(t *testing.T) {
	got := prioritizeDockerfiles(tt.candidates)
	if got != tt.want {
	t.Errorf("prioritizeDockerfiles() = %v, want %v", got, tt.want)
	}
	})
	}
	}

	func TestFindDirDockerfilesIntegration(t *testing.T) {
	// Create a temporary directory structure for testing
	tmpDir, err := os.MkdirTemp("", "dockerfiles-test-*")
	if err != nil {
	t.Fatal(err)
	}
	defer os.RemoveAll(tmpDir)

	// Create test files
	testFiles := []string{
	"Dockerfile",
	"Dockerfile.sketch",
	"Dockerfile.dev",
	"dockerfile.prod", // lowercase
	"README.md", // should be ignored
	}

	for _, file := range testFiles {
	path := filepath.Join(tmpDir, file)
	if err := os.WriteFile(path, []byte("# test"), 0o644); err != nil {
	t.Fatal(err)
	}
	}

	// Test findDirDockerfiles
	candidates, err := findDirDockerfiles(tmpDir)
	if err != nil {
	t.Fatal(err)
	}

	// Should find all Dockerfile* files but not README.md
	expectedCount := 4
	if len(candidates) != expectedCount {
	t.Errorf("findDirDockerfiles() found %d files, want %d", len(candidates), expectedCount)
	}

	// Test prioritization
	prioritized := prioritizeDockerfiles(candidates)
	expectedPriority := filepath.Join(tmpDir, "Dockerfile.sketch")
	if prioritized != expectedPriority {
	t.Errorf("prioritizeDockerfiles() = %v, want %v", prioritized, expectedPriority)
	}

	// Test with only Dockerfile (no Dockerfile.sketch)
	os.Remove(filepath.Join(tmpDir, "Dockerfile.sketch"))
	candidates, err = findDirDockerfiles(tmpDir)
	if err != nil {
	t.Fatal(err)
	}
	prioritized = prioritizeDockerfiles(candidates)
	expectedPriority = filepath.Join(tmpDir, "Dockerfile")
	if prioritized != expectedPriority {
	t.Errorf("prioritizeDockerfiles() without sketch = %v, want %v", prioritized, expectedPriority)
	}
	}

	func TestFindRepoDockerfiles(t *testing.T) {
	// Create a temporary directory structure that simulates a git repo
	tmpDir, err := os.MkdirTemp("", "repo-test-*")
	if err != nil {
	t.Fatal(err)
	}
	defer os.RemoveAll(tmpDir)

	// Create subdirectories
	subDir := filepath.Join(tmpDir, "subdir")
	if err := os.MkdirAll(subDir, 0o755); err != nil {
	t.Fatal(err)
	}

	// Create Dockerfile in subdirectory
	subDockerfile := filepath.Join(subDir, "Dockerfile")
	if err := os.WriteFile(subDockerfile, []byte("FROM ubuntu"), 0o644); err != nil {
	t.Fatal(err)
	}

	// Create Dockerfile.sketch in parent directory
	rootSketchDockerfile := filepath.Join(tmpDir, "Dockerfile.sketch")
	if err := os.WriteFile(rootSketchDockerfile, []byte("FROM alpine"), 0o644); err != nil {
	t.Fatal(err)
	}

	// Test: when called from subdirectory, should find subdirectory Dockerfile first
	candidates, err := findRepoDockerfiles(subDir, tmpDir)
	if err != nil {
	t.Fatal(err)
	}

	if len(candidates) == 0 {
	t.Fatal("expected to find at least one dockerfile")
	}

	// Should find the Dockerfile in the subdirectory
	if len(candidates) != 1 \|\| candidates[0] != subDockerfile {
	t.Errorf("expected to find %s, but got %v", subDockerfile, candidates)
	}

	// Test: when called from root with no subdirectory dockerfile, should find root dockerfile
	os.Remove(subDockerfile) // Remove subdirectory dockerfile
	candidates, err = findRepoDockerfiles(tmpDir, tmpDir)
	if err != nil {
	t.Fatal(err)
	}

	if len(candidates) != 1 \|\| candidates[0] != rootSketchDockerfile {
	t.Errorf("expected to find %s, but got %v", rootSketchDockerfile, candidates)
	}

	// Test prioritization: create both Dockerfile and Dockerfile.sketch in same directory
	rootDockerfile := filepath.Join(tmpDir, "Dockerfile")
	if err := os.WriteFile(rootDockerfile, []byte("FROM debian"), 0o644); err != nil {
	t.Fatal(err)
	}

	candidates, err = findRepoDockerfiles(tmpDir, tmpDir)
	if err != nil {
	t.Fatal(err)
	}

	if len(candidates) != 2 {
	t.Errorf("expected to find 2 dockerfiles, but got %d", len(candidates))
	}

	// Test that prioritization works correctly
	prioritized := prioritizeDockerfiles(candidates)
	if prioritized != rootSketchDockerfile {
	t.Errorf("expected Dockerfile.sketch to be prioritized, but got %s", prioritized)
	}
	}

	// TestDockerfileSketchImageReuse tests that Docker images built from Dockerfile.sketch
	// are properly reused when the Dockerfile content hasn't changed.
	func TestDockerfileSketchImageReuse(t *testing.T) {
	// Create a temporary directory for the test repo
	tmpDir := t.TempDir()

	// Create a simple Dockerfile.sketch
	dockerfileContent := `FROM ubuntu:24.04
	LABEL test=true
	CMD ["echo", "hello"]
	`
	dockerfilePath := filepath.Join(tmpDir, "Dockerfile.sketch")
	err := os.WriteFile(dockerfilePath, []byte(dockerfileContent), 0o644)
	if err != nil {
	t.Fatalf("Failed to write Dockerfile.sketch: %v", err)
	}

	// Test that hashInitFiles produces consistent results
	initFiles := map[string]string{
	dockerfilePath: dockerfileContent,
	}
	hash1 := hashInitFiles(initFiles)
	hash2 := hashInitFiles(initFiles)

	if hash1 != hash2 {
	t.Errorf("hashInitFiles should be deterministic, got %s and %s", hash1, hash2)
	}

	// Test that hash changes when content changes
	modifiedFiles := map[string]string{
	dockerfilePath: dockerfileContent + "RUN echo modified\n",
	}
	hash3 := hashInitFiles(modifiedFiles)

	if hash1 == hash3 {
	t.Errorf("hashInitFiles should produce different hashes for different content, got %s for both", hash1)
	}

	t.Logf("Original hash: %s", hash1)
	t.Logf("Modified hash: %s", hash3)
	}

	// TestPrioritizeDockerfiles tests the Dockerfile prioritization logic
	func TestDockerfileSketchPriority(t *testing.T) {
	tests := []struct {
	name string
	candidates []string
	expected string
	}{
	{
	name: "dockerfile.sketch_wins_over_dockerfile",
	candidates: []string{"/path/Dockerfile", "/path/Dockerfile.sketch"},
	expected: "/path/Dockerfile.sketch",
	},
	{
	name: "dockerfile.sketch_case_insensitive",
	candidates: []string{"/path/dockerfile", "/path/dockerfile.sketch"},
	expected: "/path/dockerfile.sketch",
	},
	{
	name: "dockerfile_wins_over_variations",
	candidates: []string{"/path/Dockerfile.dev", "/path/Dockerfile"},
	expected: "/path/Dockerfile",
	},
	}

	for _, tt := range tests {
	t.Run(tt.name, func(t *testing.T) {
	result := prioritizeDockerfiles(tt.candidates)
	if result != tt.expected {
	t.Errorf("prioritizeDockerfiles(%v) = %s, want %s", tt.candidates, result, tt.expected)
	}
	})
	}
	}