databricks-cli/libs/template/renderer_test.go

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package template
import (
"context"
"fmt"
"io"
"io/fs"
"os"
"path/filepath"
"runtime"
"strings"
"testing"
"text/template"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
)
func assertFileContent(t *testing.T, path string, content string) {
b, err := os.ReadFile(path)
require.NoError(t, err)
assert.Equal(t, content, string(b))
}
func assertFilePermissions(t *testing.T, path string, perm fs.FileMode) {
info, err := os.Stat(path)
require.NoError(t, err)
assert.Equal(t, perm, info.Mode().Perm())
}
func TestRendererWithAssociatedTemplateInLibrary(t *testing.T) {
tmpDir := t.TempDir()
r, err := newRenderer(context.Background(), nil, "./testdata/email/template", "./testdata/email/library", tmpDir)
require.NoError(t, err)
err = r.walk()
require.NoError(t, err)
err = r.persistToDisk()
require.NoError(t, err)
b, err := os.ReadFile(filepath.Join(tmpDir, "my_email"))
require.NoError(t, err)
assert.Equal(t, "shreyas.goenka@databricks.com", strings.Trim(string(b), "\n\r"))
}
func TestRendererExecuteTemplate(t *testing.T) {
templateText :=
`"{{.count}} items are made of {{.Material}}".
{{if eq .Animal "sheep" }}
Sheep wool is the best!
{{else}}
{{.Animal}} wool is not too bad...
{{end}}
My email is {{template "email"}}
`
r := renderer{
config: map[string]any{
"Material": "wool",
"count": 1,
"Animal": "sheep",
},
baseTemplate: template.Must(template.New("base").Parse(`{{define "email"}}shreyas.goenka@databricks.com{{end}}`)),
}
statement, err := r.executeTemplate(templateText)
require.NoError(t, err)
assert.Contains(t, statement, `"1 items are made of wool"`)
assert.NotContains(t, statement, `cat wool is not too bad.."`)
assert.Contains(t, statement, "Sheep wool is the best!")
assert.Contains(t, statement, `My email is shreyas.goenka@databricks.com`)
r = renderer{
config: map[string]any{
"Material": "wool",
"count": 1,
"Animal": "cat",
},
baseTemplate: template.Must(template.New("base").Parse(`{{define "email"}}hrithik.roshan@databricks.com{{end}}`)),
}
statement, err = r.executeTemplate(templateText)
require.NoError(t, err)
assert.Contains(t, statement, `"1 items are made of wool"`)
assert.Contains(t, statement, `cat wool is not too bad...`)
assert.NotContains(t, statement, "Sheep wool is the best!")
assert.Contains(t, statement, `My email is hrithik.roshan@databricks.com`)
}
func TestRendererIsSkipped(t *testing.T) {
skipPatterns := []string{"a*", "*yz", "def", "a/b/*"}
// skipped paths
match, err := isSkipped("abc", skipPatterns)
require.NoError(t, err)
assert.True(t, match)
match, err = isSkipped("abcd", skipPatterns)
require.NoError(t, err)
assert.True(t, match)
match, err = isSkipped("a", skipPatterns)
require.NoError(t, err)
assert.True(t, match)
match, err = isSkipped("xxyz", skipPatterns)
require.NoError(t, err)
assert.True(t, match)
match, err = isSkipped("yz", skipPatterns)
require.NoError(t, err)
assert.True(t, match)
match, err = isSkipped("a/b/c", skipPatterns)
require.NoError(t, err)
assert.True(t, match)
// NOT skipped paths
match, err = isSkipped(".", skipPatterns)
require.NoError(t, err)
assert.False(t, match)
match, err = isSkipped("y", skipPatterns)
require.NoError(t, err)
assert.False(t, match)
match, err = isSkipped("z", skipPatterns)
require.NoError(t, err)
assert.False(t, match)
match, err = isSkipped("defg", skipPatterns)
require.NoError(t, err)
assert.False(t, match)
match, err = isSkipped("cat", skipPatterns)
require.NoError(t, err)
assert.False(t, match)
match, err = isSkipped("a/b/c/d", skipPatterns)
require.NoError(t, err)
assert.False(t, match)
}
func TestRendererPersistToDisk(t *testing.T) {
tmpDir := t.TempDir()
ctx := context.Background()
r := &renderer{
ctx: ctx,
instanceRoot: tmpDir,
skipPatterns: []string{"a/b/c", "mn*"},
files: []file{
&inMemoryFile{
dstPath: &destinationPath{
root: tmpDir,
relPath: "a/b/c",
},
perm: 0444,
content: nil,
},
&inMemoryFile{
dstPath: &destinationPath{
root: tmpDir,
relPath: "mno",
},
perm: 0444,
content: nil,
},
&inMemoryFile{
dstPath: &destinationPath{
root: tmpDir,
relPath: "a/b/d",
},
perm: 0444,
content: []byte("123"),
},
&inMemoryFile{
dstPath: &destinationPath{
root: tmpDir,
relPath: "mmnn",
},
perm: 0444,
content: []byte("456"),
},
},
}
err := r.persistToDisk()
require.NoError(t, err)
assert.NoFileExists(t, filepath.Join(tmpDir, "a", "b", "c"))
assert.NoFileExists(t, filepath.Join(tmpDir, "mno"))
assertFileContent(t, filepath.Join(tmpDir, "a", "b", "d"), "123")
assertFilePermissions(t, filepath.Join(tmpDir, "a", "b", "d"), 0444)
assertFileContent(t, filepath.Join(tmpDir, "mmnn"), "456")
assertFilePermissions(t, filepath.Join(tmpDir, "mmnn"), 0444)
}
func TestRendererWalk(t *testing.T) {
ctx := context.Background()
tmpDir := t.TempDir()
r, err := newRenderer(ctx, nil, "./testdata/walk/template", "./testdata/walk/library", tmpDir)
require.NoError(t, err)
err = r.walk()
assert.NoError(t, err)
getContent := func(r *renderer, path string) string {
for _, f := range r.files {
if f.DstPath().relPath != path {
continue
}
switch v := f.(type) {
case *inMemoryFile:
return strings.Trim(string(v.content), "\r\n")
case *copyFile:
r, err := r.templateFiler.Read(context.Background(), v.srcPath)
require.NoError(t, err)
b, err := io.ReadAll(r)
require.NoError(t, err)
return strings.Trim(string(b), "\r\n")
default:
require.FailNow(t, "execution should not reach here")
}
}
require.FailNow(t, "file is absent: "+path)
return ""
}
assert.Len(t, r.files, 4)
assert.Equal(t, "file one", getContent(r, "file1"))
assert.Equal(t, "file two", getContent(r, "file2"))
assert.Equal(t, "file three", getContent(r, "dir1/dir3/file3"))
assert.Equal(t, "file four", getContent(r, "dir2/file4"))
}
func TestRendererFailFunction(t *testing.T) {
ctx := context.Background()
tmpDir := t.TempDir()
r, err := newRenderer(ctx, nil, "./testdata/fail/template", "./testdata/fail/library", tmpDir)
require.NoError(t, err)
err = r.walk()
assert.Equal(t, "I am an error message", err.Error())
}
func TestRendererSkipsDirsEagerly(t *testing.T) {
ctx := context.Background()
tmpDir := t.TempDir()
r, err := newRenderer(ctx, nil, "./testdata/skip-dir-eagerly/template", "./testdata/skip-dir-eagerly/library", tmpDir)
require.NoError(t, err)
err = r.walk()
assert.NoError(t, err)
assert.Len(t, r.files, 1)
content := string(r.files[0].(*inMemoryFile).content)
assert.Equal(t, "I should be the only file created", strings.Trim(content, "\r\n"))
}
func TestRendererSkipAllFilesInCurrentDirectory(t *testing.T) {
ctx := context.Background()
tmpDir := t.TempDir()
r, err := newRenderer(ctx, nil, "./testdata/skip-all-files-in-cwd/template", "./testdata/skip-all-files-in-cwd/library", tmpDir)
require.NoError(t, err)
err = r.walk()
assert.NoError(t, err)
// All 3 files are executed and have in memory representations
require.Len(t, r.files, 3)
err = r.persistToDisk()
require.NoError(t, err)
entries, err := os.ReadDir(tmpDir)
require.NoError(t, err)
// Assert none of the files are persisted to disk, because of {{skip "*"}}
assert.Len(t, entries, 0)
}
func TestRendererSkipPatternsAreRelativeToFileDirectory(t *testing.T) {
ctx := context.Background()
tmpDir := t.TempDir()
r, err := newRenderer(ctx, nil, "./testdata/skip-is-relative/template", "./testdata/skip-is-relative/library", tmpDir)
require.NoError(t, err)
err = r.walk()
assert.NoError(t, err)
assert.Len(t, r.skipPatterns, 3)
assert.Contains(t, r.skipPatterns, "a")
assert.Contains(t, r.skipPatterns, "dir1/b")
assert.Contains(t, r.skipPatterns, "dir1/dir2/c")
}
func TestRendererSkip(t *testing.T) {
ctx := context.Background()
tmpDir := t.TempDir()
r, err := newRenderer(ctx, nil, "./testdata/skip/template", "./testdata/skip/library", tmpDir)
require.NoError(t, err)
err = r.walk()
assert.NoError(t, err)
// All 6 files are computed, even though "dir2/*" is present as a skip pattern
// This is because "dir2/*" matches the files in dir2, but not dir2 itself
assert.Len(t, r.files, 6)
err = r.persistToDisk()
require.NoError(t, err)
assert.FileExists(t, filepath.Join(tmpDir, "file1"))
assert.FileExists(t, filepath.Join(tmpDir, "file2"))
assert.FileExists(t, filepath.Join(tmpDir, "dir1/file5"))
// These files have been skipped
assert.NoFileExists(t, filepath.Join(tmpDir, "file3"))
assert.NoFileExists(t, filepath.Join(tmpDir, "dir1/file4"))
assert.NoDirExists(t, filepath.Join(tmpDir, "dir2"))
assert.NoFileExists(t, filepath.Join(tmpDir, "dir2/file6"))
}
func TestRendererReadsPermissionsBits(t *testing.T) {
if runtime.GOOS != "linux" && runtime.GOOS != "darwin" {
t.SkipNow()
}
tmpDir := t.TempDir()
ctx := context.Background()
r, err := newRenderer(ctx, nil, "./testdata/executable-bit-read/template", "./testdata/executable-bit-read/library", tmpDir)
require.NoError(t, err)
err = r.walk()
assert.NoError(t, err)
getPermissions := func(r *renderer, path string) fs.FileMode {
for _, f := range r.files {
if f.DstPath().relPath != path {
continue
}
switch v := f.(type) {
case *inMemoryFile:
return v.perm
case *copyFile:
return v.perm
default:
require.FailNow(t, "execution should not reach here")
}
}
require.FailNow(t, "file is absent: "+path)
return 0
}
assert.Len(t, r.files, 2)
assert.Equal(t, getPermissions(r, "script.sh"), fs.FileMode(0755))
assert.Equal(t, getPermissions(r, "not-a-script"), fs.FileMode(0644))
}
func TestRendererErrorOnConflictingFile(t *testing.T) {
tmpDir := t.TempDir()
f, err := os.Create(filepath.Join(tmpDir, "a"))
require.NoError(t, err)
err = f.Close()
require.NoError(t, err)
r := renderer{
skipPatterns: []string{},
files: []file{
&inMemoryFile{
dstPath: &destinationPath{
root: tmpDir,
relPath: "a",
},
perm: 0444,
content: []byte("123"),
},
},
}
err = r.persistToDisk()
assert.EqualError(t, err, fmt.Sprintf("failed to persist to disk, conflict with existing file: %s", filepath.Join(tmpDir, "a")))
}
func TestRendererNoErrorOnConflictingFileIfSkipped(t *testing.T) {
tmpDir := t.TempDir()
ctx := context.Background()
f, err := os.Create(filepath.Join(tmpDir, "a"))
require.NoError(t, err)
err = f.Close()
require.NoError(t, err)
r := renderer{
ctx: ctx,
skipPatterns: []string{"a"},
files: []file{
&inMemoryFile{
dstPath: &destinationPath{
root: tmpDir,
relPath: "a",
},
perm: 0444,
content: []byte("123"),
},
},
}
err = r.persistToDisk()
// No error is returned even though a conflicting file exists. This is because
// the generated file is being skipped
assert.NoError(t, err)
assert.Len(t, r.files, 1)
}
func TestRendererNonTemplatesAreCreatedAsCopyFiles(t *testing.T) {
ctx := context.Background()
tmpDir := t.TempDir()
r, err := newRenderer(ctx, nil, "./testdata/copy-file-walk/template", "./testdata/copy-file-walk/library", tmpDir)
require.NoError(t, err)
err = r.walk()
assert.NoError(t, err)
assert.Len(t, r.files, 1)
assert.Equal(t, r.files[0].(*copyFile).srcPath, "not-a-template")
assert.Equal(t, r.files[0].DstPath().absPath(), filepath.Join(tmpDir, "not-a-template"))
}
func TestRendererFileTreeRendering(t *testing.T) {
ctx := context.Background()
tmpDir := t.TempDir()
r, err := newRenderer(ctx, map[string]any{
"dir_name": "my_directory",
"file_name": "my_file",
}, "./testdata/file-tree-rendering/template", "./testdata/file-tree-rendering/library", tmpDir)
require.NoError(t, err)
err = r.walk()
assert.NoError(t, err)
// Assert in memory representation is created.
assert.Len(t, r.files, 1)
assert.Equal(t, r.files[0].DstPath().absPath(), filepath.Join(tmpDir, "my_directory", "my_file"))
err = r.persistToDisk()
require.NoError(t, err)
// Assert files and directories are correctly materialized.
assert.DirExists(t, filepath.Join(tmpDir, "my_directory"))
assert.FileExists(t, filepath.Join(tmpDir, "my_directory", "my_file"))
}