importer_test.go

     1  // Copyright 2013 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  package gccgoimporter
     6  
     7  import (
     8  	"go/types"
     9  	"internal/testenv"
    10  	"os"
    11  	"os/exec"
    12  	"path/filepath"
    13  	"regexp"
    14  	"strconv"
    15  	"testing"
    16  )
    17  
    18  type importerTest struct {
    19  	pkgpath, name, want, wantval string
    20  	wantinits                    []string
    21  	gccgoVersion                 int // minimum gccgo version (0 => any)
    22  }
    23  
    24  func runImporterTest(t *testing.T, imp Importer, initmap map[*types.Package]InitData, test *importerTest) {
    25  	pkg, err := imp(make(map[string]*types.Package), test.pkgpath, ".", nil)
    26  	if err != nil {
    27  		t.Error(err)
    28  		return
    29  	}
    30  
    31  	if test.name != "" {
    32  		obj := pkg.Scope().Lookup(test.name)
    33  		if obj == nil {
    34  			t.Errorf("%s: object not found", test.name)
    35  			return
    36  		}
    37  
    38  		got := types.ObjectString(obj, types.RelativeTo(pkg))
    39  		if got != test.want {
    40  			t.Errorf("%s: got %q; want %q", test.name, got, test.want)
    41  		}
    42  
    43  		if test.wantval != "" {
    44  			gotval := obj.(*types.Const).Val().String()
    45  			if gotval != test.wantval {
    46  				t.Errorf("%s: got val %q; want val %q", test.name, gotval, test.wantval)
    47  			}
    48  		}
    49  	}
    50  
    51  	if len(test.wantinits) > 0 {
    52  		initdata := initmap[pkg]
    53  		found := false
    54  		// Check that the package's own init function has the package's priority
    55  		for _, pkginit := range initdata.Inits {
    56  			if pkginit.InitFunc == test.wantinits[0] {
    57  				found = true
    58  				break
    59  			}
    60  		}
    61  
    62  		if !found {
    63  			t.Errorf("%s: could not find expected function %q", test.pkgpath, test.wantinits[0])
    64  		}
    65  
    66  		// FIXME: the original version of this test was written against
    67  		// the v1 export data scheme for capturing init functions, so it
    68  		// verified the priority values. We moved away from the priority
    69  		// scheme some time ago; it is not clear how much work it would be
    70  		// to validate the new init export data.
    71  	}
    72  }
    73  
    74  // When adding tests to this list, be sure to set the 'gccgoVersion'
    75  // field if the testcases uses a "recent" Go addition (ex: aliases).
    76  var importerTests = [...]importerTest{
    77  	{pkgpath: "pointer", name: "Int8Ptr", want: "type Int8Ptr *int8"},
    78  	{pkgpath: "complexnums", name: "NN", want: "const NN untyped complex", wantval: "(-1 + -1i)"},
    79  	{pkgpath: "complexnums", name: "NP", want: "const NP untyped complex", wantval: "(-1 + 1i)"},
    80  	{pkgpath: "complexnums", name: "PN", want: "const PN untyped complex", wantval: "(1 + -1i)"},
    81  	{pkgpath: "complexnums", name: "PP", want: "const PP untyped complex", wantval: "(1 + 1i)"},
    82  	{pkgpath: "conversions", name: "Bits", want: "const Bits Units", wantval: `"bits"`},
    83  	{pkgpath: "time", name: "Duration", want: "type Duration int64"},
    84  	{pkgpath: "time", name: "Nanosecond", want: "const Nanosecond Duration", wantval: "1"},
    85  	{pkgpath: "unicode", name: "IsUpper", want: "func IsUpper(r rune) bool"},
    86  	{pkgpath: "unicode", name: "MaxRune", want: "const MaxRune untyped rune", wantval: "1114111"},
    87  	{pkgpath: "imports", wantinits: []string{"imports..import", "fmt..import"}},
    88  	{pkgpath: "importsar", name: "Hello", want: "var Hello string"},
    89  	{pkgpath: "aliases", name: "A14", gccgoVersion: 7, want: "type A14 = func(int, T0) chan T2"},
    90  	{pkgpath: "aliases", name: "C0", gccgoVersion: 7, want: "type C0 struct{f1 C1; f2 C1}"},
    91  	{pkgpath: "escapeinfo", name: "NewT", want: "func NewT(data []byte) *T"},
    92  	{pkgpath: "issue27856", name: "M", gccgoVersion: 7, want: "type M struct{E F}"},
    93  	{pkgpath: "v1reflect", name: "Type", want: "type Type interface{Align() int; AssignableTo(u Type) bool; Bits() int; ChanDir() ChanDir; Elem() Type; Field(i int) StructField; FieldAlign() int; FieldByIndex(index []int) StructField; FieldByName(name string) (StructField, bool); FieldByNameFunc(match func(string) bool) (StructField, bool); Implements(u Type) bool; In(i int) Type; IsVariadic() bool; Key() Type; Kind() Kind; Len() int; Method(int) Method; MethodByName(string) (Method, bool); Name() string; NumField() int; NumIn() int; NumMethod() int; NumOut() int; Out(i int) Type; PkgPath() string; Size() uintptr; String() string; common() *commonType; rawString() string; runtimeType() *runtimeType; uncommon() *uncommonType}"},
    94  	{pkgpath: "nointerface", name: "I", want: "type I int"},
    95  	{pkgpath: "issue29198", name: "FooServer", gccgoVersion: 7, want: "type FooServer struct{FooServer *FooServer; user string; ctx context.Context}"},
    96  	{pkgpath: "issue30628", name: "Apple", want: "type Apple struct{hey sync.RWMutex; x int; RQ [517]struct{Count uintptr; NumBytes uintptr; Last uintptr}}"},
    97  	{pkgpath: "issue31540", name: "S", gccgoVersion: 7, want: "type S struct{b int; map[Y]Z}"}, // should want "type S struct{b int; A2}" (issue  #44410)
    98  	{pkgpath: "issue34182", name: "T1", want: "type T1 struct{f *T2}"},
    99  	{pkgpath: "notinheap", name: "S", want: "type S struct{}"},
   100  }
   101  
   102  func TestGoxImporter(t *testing.T) {
   103  	testenv.MustHaveExec(t)
   104  	initmap := make(map[*types.Package]InitData)
   105  	imp := GetImporter([]string{"testdata"}, initmap)
   106  
   107  	for _, test := range importerTests {
   108  		runImporterTest(t, imp, initmap, &test)
   109  	}
   110  }
   111  
   112  // gccgoPath returns a path to gccgo if it is present (either in
   113  // path or specified via GCCGO environment variable), or an
   114  // empty string if no gccgo is available.
   115  func gccgoPath() string {
   116  	gccgoname := os.Getenv("GCCGO")
   117  	if gccgoname == "" {
   118  		gccgoname = "gccgo"
   119  	}
   120  	if gpath, gerr := exec.LookPath(gccgoname); gerr == nil {
   121  		return gpath
   122  	}
   123  	return ""
   124  }
   125  
   126  func TestObjImporter(t *testing.T) {
   127  	// This test relies on gccgo being around.
   128  	gpath := gccgoPath()
   129  	if gpath == "" {
   130  		t.Skip("This test needs gccgo")
   131  	}
   132  
   133  	verout, err := exec.Command(gpath, "--version").CombinedOutput()
   134  	if err != nil {
   135  		t.Logf("%s", verout)
   136  		t.Fatal(err)
   137  	}
   138  	vers := regexp.MustCompile(`([0-9]+)\.([0-9]+)`).FindSubmatch(verout)
   139  	if len(vers) == 0 {
   140  		t.Fatalf("could not find version number in %s", verout)
   141  	}
   142  	major, err := strconv.Atoi(string(vers[1]))
   143  	if err != nil {
   144  		t.Fatal(err)
   145  	}
   146  	minor, err := strconv.Atoi(string(vers[2]))
   147  	if err != nil {
   148  		t.Fatal(err)
   149  	}
   150  	t.Logf("gccgo version %d.%d", major, minor)
   151  
   152  	tmpdir := t.TempDir()
   153  	initmap := make(map[*types.Package]InitData)
   154  	imp := GetImporter([]string{tmpdir}, initmap)
   155  
   156  	artmpdir := t.TempDir()
   157  	arinitmap := make(map[*types.Package]InitData)
   158  	arimp := GetImporter([]string{artmpdir}, arinitmap)
   159  
   160  	for _, test := range importerTests {
   161  		if major < test.gccgoVersion {
   162  			// Support for type aliases was added in GCC 7.
   163  			t.Logf("skipping %q: not supported before gccgo version %d", test.pkgpath, test.gccgoVersion)
   164  			continue
   165  		}
   166  
   167  		gofile := filepath.Join("testdata", test.pkgpath+".go")
   168  		if _, err := os.Stat(gofile); os.IsNotExist(err) {
   169  			continue
   170  		}
   171  		ofile := filepath.Join(tmpdir, test.pkgpath+".o")
   172  		afile := filepath.Join(artmpdir, "lib"+test.pkgpath+".a")
   173  
   174  		cmd := exec.Command(gpath, "-fgo-pkgpath="+test.pkgpath, "-c", "-o", ofile, gofile)
   175  		out, err := cmd.CombinedOutput()
   176  		if err != nil {
   177  			t.Logf("%s", out)
   178  			t.Fatalf("gccgo %s failed: %s", gofile, err)
   179  		}
   180  
   181  		runImporterTest(t, imp, initmap, &test)
   182  
   183  		cmd = exec.Command("ar", "cr", afile, ofile)
   184  		out, err = cmd.CombinedOutput()
   185  		if err != nil {
   186  			t.Logf("%s", out)
   187  			t.Fatalf("ar cr %s %s failed: %s", afile, ofile, err)
   188  		}
   189  
   190  		runImporterTest(t, arimp, arinitmap, &test)
   191  
   192  		if err = os.Remove(ofile); err != nil {
   193  			t.Fatal(err)
   194  		}
   195  		if err = os.Remove(afile); err != nil {
   196  			t.Fatal(err)
   197  		}
   198  	}
   199  }
   200
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