1// Copyright 2021 Google LLC 2// 3// Licensed under the Apache License, Version 2.0 (the "License"); 4// you may not use this file except in compliance with the License. 5// You may obtain a copy of the License at 6// 7// http://www.apache.org/licenses/LICENSE-2.0 8// 9// Unless required by applicable law or agreed to in writing, software 10// distributed under the License is distributed on an "AS IS" BASIS, 11// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12// See the License for the specific language governing permissions and 13// limitations under the License. 14 15package rbcrun 16 17import ( 18 "fmt" 19 "os" 20 "path/filepath" 21 "runtime" 22 "testing" 23 24 "go.starlark.net/resolve" 25 "go.starlark.net/starlark" 26 "go.starlark.net/starlarktest" 27) 28 29// In order to use "assert.star" from go/starlark.net/starlarktest in the tests, 30// provide: 31// * load function that handles "assert.star" 32// * starlarktest.DataFile function that finds its location 33 34func init() { 35 starlarktestSetup() 36} 37 38func starlarktestSetup() { 39 resolve.AllowLambda = true 40 starlarktest.DataFile = func(pkgdir, filename string) string { 41 // The caller expects this function to return the path to the 42 // data file. The implementation assumes that the source file 43 // containing the caller and the data file are in the same 44 // directory. It's ugly. Not sure what's the better way. 45 // TODO(asmundak): handle Bazel case 46 _, starlarktestSrcFile, _, _ := runtime.Caller(1) 47 if filepath.Base(starlarktestSrcFile) != "starlarktest.go" { 48 panic(fmt.Errorf("this function should be called from starlarktest.go, got %s", 49 starlarktestSrcFile)) 50 } 51 return filepath.Join(filepath.Dir(starlarktestSrcFile), filename) 52 } 53} 54 55// Common setup for the tests: create thread, change to the test directory 56func testSetup(t *testing.T, env []string) *starlark.Thread { 57 setup(env) 58 thread := &starlark.Thread{ 59 Load: func(thread *starlark.Thread, module string) (starlark.StringDict, error) { 60 if module == "assert.star" { 61 return starlarktest.LoadAssertModule() 62 } 63 return nil, fmt.Errorf("load not implemented") 64 }} 65 starlarktest.SetReporter(thread, t) 66 if err := os.Chdir(dataDir()); err != nil { 67 t.Fatal(err) 68 } 69 return thread 70} 71 72func dataDir() string { 73 _, thisSrcFile, _, _ := runtime.Caller(0) 74 return filepath.Join(filepath.Dir(thisSrcFile), "testdata") 75 76} 77 78func exerciseStarlarkTestFile(t *testing.T, starFile string) { 79 // In order to use "assert.star" from go/starlark.net/starlarktest in the tests, provide: 80 // * load function that handles "assert.star" 81 // * starlarktest.DataFile function that finds its location 82 setup(nil) 83 thread := &starlark.Thread{ 84 Load: func(thread *starlark.Thread, module string) (starlark.StringDict, error) { 85 if module == "assert.star" { 86 return starlarktest.LoadAssertModule() 87 } 88 return nil, fmt.Errorf("load not implemented") 89 }} 90 starlarktest.SetReporter(thread, t) 91 _, thisSrcFile, _, _ := runtime.Caller(0) 92 filename := filepath.Join(filepath.Dir(thisSrcFile), starFile) 93 if _, err := starlark.ExecFile(thread, filename, nil, builtins); err != nil { 94 if err, ok := err.(*starlark.EvalError); ok { 95 t.Fatal(err.Backtrace()) 96 } 97 t.Fatal(err) 98 } 99} 100 101func TestCliAndEnv(t *testing.T) { 102 // TODO(asmundak): convert this to use exerciseStarlarkTestFile 103 if err := os.Setenv("TEST_ENVIRONMENT_FOO", "test_environment_foo"); err != nil { 104 t.Fatal(err) 105 } 106 thread := testSetup(t, []string{"CLI_FOO=foo"}) 107 if _, err := starlark.ExecFile(thread, "cli_and_env.star", nil, builtins); err != nil { 108 if err, ok := err.(*starlark.EvalError); ok { 109 t.Fatal(err.Backtrace()) 110 } 111 t.Fatal(err) 112 } 113} 114 115func TestFileOps(t *testing.T) { 116 // TODO(asmundak): convert this to use exerciseStarlarkTestFile 117 if err := os.Setenv("TEST_DATA_DIR", dataDir()); err != nil { 118 t.Fatal(err) 119 } 120 thread := testSetup(t, nil) 121 if _, err := starlark.ExecFile(thread, "file_ops.star", nil, builtins); err != nil { 122 if err, ok := err.(*starlark.EvalError); ok { 123 t.Fatal(err.Backtrace()) 124 } 125 t.Fatal(err) 126 } 127} 128 129func TestLoad(t *testing.T) { 130 // TODO(asmundak): convert this to use exerciseStarlarkTestFile 131 thread := testSetup(t, nil) 132 thread.Load = func(thread *starlark.Thread, module string) (starlark.StringDict, error) { 133 if module == "assert.star" { 134 return starlarktest.LoadAssertModule() 135 } else { 136 return loader(thread, module) 137 } 138 } 139 dir := dataDir() 140 thread.SetLocal(callerDirKey, dir) 141 LoadPathRoot = filepath.Dir(dir) 142 if _, err := starlark.ExecFile(thread, "load.star", nil, builtins); err != nil { 143 if err, ok := err.(*starlark.EvalError); ok { 144 t.Fatal(err.Backtrace()) 145 } 146 t.Fatal(err) 147 } 148} 149 150func TestRegex(t *testing.T) { 151 exerciseStarlarkTestFile(t, "testdata/regex.star") 152} 153 154func TestShell(t *testing.T) { 155 if err := os.Setenv("TEST_DATA_DIR", dataDir()); err != nil { 156 t.Fatal(err) 157 } 158 exerciseStarlarkTestFile(t, "testdata/shell.star") 159} 160