122 lines
2.6 KiB
Go
122 lines
2.6 KiB
Go
// Copyright 2024, Pulumi Corporation.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package main
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import (
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"flag"
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"fmt"
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"go/ast"
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"go/parser"
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"go/token"
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"log"
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"math/rand"
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"os"
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"path/filepath"
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"regexp"
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"slices"
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"strings"
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)
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var (
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rootFlag = flag.String("root", ".", "directory to search")
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shardFlag = flag.Int("shard", 0, "shard index to collect tests for")
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nFlag = flag.Int("n", 1, "the total number of shards")
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seedFlag = flag.Int64("seed", 0, "randomly shuffle tests using a non-zero seed")
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)
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var re = regexp.MustCompile(`^Test[A-Z_]`)
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type testf struct {
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path string
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name string
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}
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func main() {
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flag.Parse()
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root := *rootFlag
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shard := *shardFlag
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n := *nFlag
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if shard >= n {
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log.Fatal("shard must be less than n")
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}
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if shard < 0 || n < 0 {
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log.Fatal("must be non-negative")
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}
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tests := []testf{}
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err := filepath.Walk(root, func(path string, info os.FileInfo, err error) error {
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if err != nil {
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return err
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}
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if info.IsDir() || !strings.HasSuffix(path, "_test.go") {
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return nil
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}
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// Parse the file to find test functions
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fileSet := token.NewFileSet()
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node, err := parser.ParseFile(fileSet, path, nil, 0)
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if err != nil {
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return err
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}
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for _, decl := range node.Decls {
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f, ok := decl.(*ast.FuncDecl)
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if !ok {
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continue
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}
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name := f.Name.Name
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if !re.MatchString(name) {
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continue
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}
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tests = append(tests, testf{path: filepath.Dir(path), name: name})
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}
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return nil
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})
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if err != nil {
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log.Fatal(err)
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}
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// Shuffle the tests.
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seed := *seedFlag
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if seed != 0 {
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random := rand.New(rand.NewSource(seed))
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for i := range tests {
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j := random.Intn(i + 1) //nolint:gosec // Not cryptographic.
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tests[i], tests[j] = tests[j], tests[i]
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}
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}
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// Assign tests to our shard.
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paths := []string{}
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names := []string{}
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for idx, test := range tests {
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if idx%n != shard {
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continue
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}
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paths = append(paths, "./"+test.path)
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names = append(names, test.name)
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}
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// De-dupe.
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slices.Sort(paths)
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slices.Sort(names)
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paths = slices.Compact(paths)
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names = slices.Compact(names)
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fmt.Printf("-run ^(%s)$ %s\n", strings.Join(names, "|"), strings.Join(paths, " "))
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}
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