File size: 4,973 Bytes
fc11197 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 | // Copyright 2015 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package test
import (
"bytes"
"fmt"
"go/ast"
"go/parser"
"go/token"
"internal/testenv"
"os"
"path/filepath"
"runtime"
"strings"
"testing"
)
// runGenTest runs a test-generator, then runs the generated test.
// Generated test can either fail in compilation or execution.
// The environment variable parameter(s) is passed to the run
// of the generated test.
func runGenTest(t *testing.T, filename, tmpname string, ev ...string) {
testenv.MustHaveGoRun(t)
gotool := testenv.GoToolPath(t)
var stdout, stderr bytes.Buffer
cmd := testenv.Command(t, gotool, "run", filepath.Join("testdata", filename))
cmd.Stdout = &stdout
cmd.Stderr = &stderr
if err := cmd.Run(); err != nil {
t.Fatalf("Failed: %v:\nOut: %s\nStderr: %s\n", err, &stdout, &stderr)
}
// Write stdout into a temporary file
rungo := filepath.Join(t.TempDir(), "run.go")
ok := os.WriteFile(rungo, stdout.Bytes(), 0600)
if ok != nil {
t.Fatalf("Failed to create temporary file %s", rungo)
}
stdout.Reset()
stderr.Reset()
cmd = testenv.Command(t, gotool, "run", "-gcflags=-d=ssa/check/on", rungo)
cmd.Stdout = &stdout
cmd.Stderr = &stderr
cmd.Env = append(cmd.Env, ev...)
err := cmd.Run()
if err != nil {
t.Fatalf("Failed: %v:\nOut: %s\nStderr: %s\n", err, &stdout, &stderr)
}
if s := stderr.String(); s != "" {
t.Errorf("Stderr = %s\nWant empty", s)
}
if s := stdout.String(); s != "" {
t.Errorf("Stdout = %s\nWant empty", s)
}
}
func TestGenFlowGraph(t *testing.T) {
if testing.Short() {
t.Skip("not run in short mode.")
}
runGenTest(t, "flowgraph_generator1.go", "ssa_fg_tmp1")
}
// TestCode runs all the tests in the testdata directory as subtests.
// These tests are special because we want to run them with different
// compiler flags set (and thus they can't just be _test.go files in
// this directory).
func TestCode(t *testing.T) {
testenv.MustHaveGoBuild(t)
gotool := testenv.GoToolPath(t)
// Make a temporary directory to work in.
tmpdir := t.TempDir()
// Find all the test functions (and the files containing them).
var srcs []string // files containing Test functions
type test struct {
name string // TestFoo
usesFloat bool // might use float operations
}
var tests []test
files, err := os.ReadDir("testdata")
if err != nil {
t.Fatalf("can't read testdata directory: %v", err)
}
for _, f := range files {
if !strings.HasSuffix(f.Name(), "_test.go") {
continue
}
text, err := os.ReadFile(filepath.Join("testdata", f.Name()))
if err != nil {
t.Fatalf("can't read testdata/%s: %v", f.Name(), err)
}
fset := token.NewFileSet()
code, err := parser.ParseFile(fset, f.Name(), text, 0)
if err != nil {
t.Fatalf("can't parse testdata/%s: %v", f.Name(), err)
}
srcs = append(srcs, filepath.Join("testdata", f.Name()))
foundTest := false
for _, d := range code.Decls {
fd, ok := d.(*ast.FuncDecl)
if !ok {
continue
}
if !strings.HasPrefix(fd.Name.Name, "Test") {
continue
}
if fd.Recv != nil {
continue
}
if fd.Type.Results != nil {
continue
}
if len(fd.Type.Params.List) != 1 {
continue
}
p := fd.Type.Params.List[0]
if len(p.Names) != 1 {
continue
}
s, ok := p.Type.(*ast.StarExpr)
if !ok {
continue
}
sel, ok := s.X.(*ast.SelectorExpr)
if !ok {
continue
}
base, ok := sel.X.(*ast.Ident)
if !ok {
continue
}
if base.Name != "testing" {
continue
}
if sel.Sel.Name != "T" {
continue
}
// Found a testing function.
tests = append(tests, test{name: fd.Name.Name, usesFloat: bytes.Contains(text, []byte("float"))})
foundTest = true
}
if !foundTest {
t.Fatalf("test file testdata/%s has no tests in it", f.Name())
}
}
flags := []string{""}
if runtime.GOARCH == "arm" || runtime.GOARCH == "mips" || runtime.GOARCH == "mips64" || runtime.GOARCH == "386" {
flags = append(flags, ",softfloat")
}
for _, flag := range flags {
args := []string{"test", "-c", "-gcflags=-d=ssa/check/on" + flag, "-o", filepath.Join(tmpdir, "code.test")}
args = append(args, srcs...)
out, err := testenv.Command(t, gotool, args...).CombinedOutput()
if err != nil || len(out) != 0 {
t.Fatalf("Build failed: %v\n%s\n", err, out)
}
// Now we have a test binary. Run it with all the tests as subtests of this one.
for _, test := range tests {
test := test
if flag == ",softfloat" && !test.usesFloat {
// No point in running the soft float version if the test doesn't use floats.
continue
}
t.Run(fmt.Sprintf("%s%s", test.name[4:], flag), func(t *testing.T) {
out, err := testenv.Command(t, filepath.Join(tmpdir, "code.test"), "-test.run=^"+test.name+"$").CombinedOutput()
if err != nil || string(out) != "PASS\n" {
t.Errorf("Failed:\n%s\n", out)
}
})
}
}
}
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