diff options
Diffstat (limited to 'libgo/go/cmd/go/internal/modfile/read_test.go')
| -rw-r--r-- | libgo/go/cmd/go/internal/modfile/read_test.go | 365 |
1 files changed, 0 insertions, 365 deletions
diff --git a/libgo/go/cmd/go/internal/modfile/read_test.go b/libgo/go/cmd/go/internal/modfile/read_test.go deleted file mode 100644 index 8cb1a3908c5..00000000000 --- a/libgo/go/cmd/go/internal/modfile/read_test.go +++ /dev/null @@ -1,365 +0,0 @@ -// Copyright 2018 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 modfile - -import ( - "bytes" - "fmt" - "io/ioutil" - "os" - "os/exec" - "path/filepath" - "reflect" - "strings" - "testing" -) - -// exists reports whether the named file exists. -func exists(name string) bool { - _, err := os.Stat(name) - return err == nil -} - -// Test that reading and then writing the golden files -// does not change their output. -func TestPrintGolden(t *testing.T) { - outs, err := filepath.Glob("testdata/*.golden") - if err != nil { - t.Fatal(err) - } - for _, out := range outs { - testPrint(t, out, out) - } -} - -// testPrint is a helper for testing the printer. -// It reads the file named in, reformats it, and compares -// the result to the file named out. -func testPrint(t *testing.T, in, out string) { - data, err := ioutil.ReadFile(in) - if err != nil { - t.Error(err) - return - } - - golden, err := ioutil.ReadFile(out) - if err != nil { - t.Error(err) - return - } - - base := "testdata/" + filepath.Base(in) - f, err := parse(in, data) - if err != nil { - t.Error(err) - return - } - - ndata := Format(f) - - if !bytes.Equal(ndata, golden) { - t.Errorf("formatted %s incorrectly: diff shows -golden, +ours", base) - tdiff(t, string(golden), string(ndata)) - return - } -} - -func TestParseLax(t *testing.T) { - badFile := []byte(`module m - surprise attack - x y ( - z - ) - exclude v1.2.3 - replace <-!!! - `) - _, err := ParseLax("file", badFile, nil) - if err != nil { - t.Fatalf("ParseLax did not ignore irrelevant errors: %v", err) - } -} - -// Test that when files in the testdata directory are parsed -// and printed and parsed again, we get the same parse tree -// both times. -func TestPrintParse(t *testing.T) { - outs, err := filepath.Glob("testdata/*") - if err != nil { - t.Fatal(err) - } - for _, out := range outs { - data, err := ioutil.ReadFile(out) - if err != nil { - t.Error(err) - continue - } - - base := "testdata/" + filepath.Base(out) - f, err := parse(base, data) - if err != nil { - t.Errorf("parsing original: %v", err) - continue - } - - ndata := Format(f) - f2, err := parse(base, ndata) - if err != nil { - t.Errorf("parsing reformatted: %v", err) - continue - } - - eq := eqchecker{file: base} - if err := eq.check(f, f2); err != nil { - t.Errorf("not equal (parse/Format/parse): %v", err) - } - - pf1, err := Parse(base, data, nil) - if err != nil { - switch base { - case "testdata/replace2.in", "testdata/gopkg.in.golden": - t.Errorf("should parse %v: %v", base, err) - } - } - if err == nil { - pf2, err := Parse(base, ndata, nil) - if err != nil { - t.Errorf("Parsing reformatted: %v", err) - continue - } - eq := eqchecker{file: base} - if err := eq.check(pf1, pf2); err != nil { - t.Errorf("not equal (parse/Format/Parse): %v", err) - } - - ndata2, err := pf1.Format() - if err != nil { - t.Errorf("reformat: %v", err) - } - pf3, err := Parse(base, ndata2, nil) - if err != nil { - t.Errorf("Parsing reformatted2: %v", err) - continue - } - eq = eqchecker{file: base} - if err := eq.check(pf1, pf3); err != nil { - t.Errorf("not equal (Parse/Format/Parse): %v", err) - } - ndata = ndata2 - } - - if strings.HasSuffix(out, ".in") { - golden, err := ioutil.ReadFile(strings.TrimSuffix(out, ".in") + ".golden") - if err != nil { - t.Error(err) - continue - } - if !bytes.Equal(ndata, golden) { - t.Errorf("formatted %s incorrectly: diff shows -golden, +ours", base) - tdiff(t, string(golden), string(ndata)) - return - } - } - } -} - -// An eqchecker holds state for checking the equality of two parse trees. -type eqchecker struct { - file string - pos Position -} - -// errorf returns an error described by the printf-style format and arguments, -// inserting the current file position before the error text. -func (eq *eqchecker) errorf(format string, args ...interface{}) error { - return fmt.Errorf("%s:%d: %s", eq.file, eq.pos.Line, - fmt.Sprintf(format, args...)) -} - -// check checks that v and w represent the same parse tree. -// If not, it returns an error describing the first difference. -func (eq *eqchecker) check(v, w interface{}) error { - return eq.checkValue(reflect.ValueOf(v), reflect.ValueOf(w)) -} - -var ( - posType = reflect.TypeOf(Position{}) - commentsType = reflect.TypeOf(Comments{}) -) - -// checkValue checks that v and w represent the same parse tree. -// If not, it returns an error describing the first difference. -func (eq *eqchecker) checkValue(v, w reflect.Value) error { - // inner returns the innermost expression for v. - // if v is a non-nil interface value, it returns the concrete - // value in the interface. - inner := func(v reflect.Value) reflect.Value { - for { - if v.Kind() == reflect.Interface && !v.IsNil() { - v = v.Elem() - continue - } - break - } - return v - } - - v = inner(v) - w = inner(w) - if v.Kind() == reflect.Invalid && w.Kind() == reflect.Invalid { - return nil - } - if v.Kind() == reflect.Invalid { - return eq.errorf("nil interface became %s", w.Type()) - } - if w.Kind() == reflect.Invalid { - return eq.errorf("%s became nil interface", v.Type()) - } - - if v.Type() != w.Type() { - return eq.errorf("%s became %s", v.Type(), w.Type()) - } - - if p, ok := v.Interface().(Expr); ok { - eq.pos, _ = p.Span() - } - - switch v.Kind() { - default: - return eq.errorf("unexpected type %s", v.Type()) - - case reflect.Bool, reflect.Int, reflect.String: - vi := v.Interface() - wi := w.Interface() - if vi != wi { - return eq.errorf("%v became %v", vi, wi) - } - - case reflect.Slice: - vl := v.Len() - wl := w.Len() - for i := 0; i < vl || i < wl; i++ { - if i >= vl { - return eq.errorf("unexpected %s", w.Index(i).Type()) - } - if i >= wl { - return eq.errorf("missing %s", v.Index(i).Type()) - } - if err := eq.checkValue(v.Index(i), w.Index(i)); err != nil { - return err - } - } - - case reflect.Struct: - // Fields in struct must match. - t := v.Type() - n := t.NumField() - for i := 0; i < n; i++ { - tf := t.Field(i) - switch { - default: - if err := eq.checkValue(v.Field(i), w.Field(i)); err != nil { - return err - } - - case tf.Type == posType: // ignore positions - case tf.Type == commentsType: // ignore comment assignment - } - } - - case reflect.Ptr, reflect.Interface: - if v.IsNil() != w.IsNil() { - if v.IsNil() { - return eq.errorf("unexpected %s", w.Elem().Type()) - } - return eq.errorf("missing %s", v.Elem().Type()) - } - if err := eq.checkValue(v.Elem(), w.Elem()); err != nil { - return err - } - } - return nil -} - -// diff returns the output of running diff on b1 and b2. -func diff(b1, b2 []byte) (data []byte, err error) { - f1, err := ioutil.TempFile("", "testdiff") - if err != nil { - return nil, err - } - defer os.Remove(f1.Name()) - defer f1.Close() - - f2, err := ioutil.TempFile("", "testdiff") - if err != nil { - return nil, err - } - defer os.Remove(f2.Name()) - defer f2.Close() - - f1.Write(b1) - f2.Write(b2) - - data, err = exec.Command("diff", "-u", f1.Name(), f2.Name()).CombinedOutput() - if len(data) > 0 { - // diff exits with a non-zero status when the files don't match. - // Ignore that failure as long as we get output. - err = nil - } - return -} - -// tdiff logs the diff output to t.Error. -func tdiff(t *testing.T, a, b string) { - data, err := diff([]byte(a), []byte(b)) - if err != nil { - t.Error(err) - return - } - t.Error(string(data)) -} - -var modulePathTests = []struct { - input []byte - expected string -}{ - {input: []byte("module \"github.com/rsc/vgotest\""), expected: "github.com/rsc/vgotest"}, - {input: []byte("module github.com/rsc/vgotest"), expected: "github.com/rsc/vgotest"}, - {input: []byte("module \"github.com/rsc/vgotest\""), expected: "github.com/rsc/vgotest"}, - {input: []byte("module github.com/rsc/vgotest"), expected: "github.com/rsc/vgotest"}, - {input: []byte("module `github.com/rsc/vgotest`"), expected: "github.com/rsc/vgotest"}, - {input: []byte("module \"github.com/rsc/vgotest/v2\""), expected: "github.com/rsc/vgotest/v2"}, - {input: []byte("module github.com/rsc/vgotest/v2"), expected: "github.com/rsc/vgotest/v2"}, - {input: []byte("module \"gopkg.in/yaml.v2\""), expected: "gopkg.in/yaml.v2"}, - {input: []byte("module gopkg.in/yaml.v2"), expected: "gopkg.in/yaml.v2"}, - {input: []byte("module \"gopkg.in/check.v1\"\n"), expected: "gopkg.in/check.v1"}, - {input: []byte("module \"gopkg.in/check.v1\n\""), expected: ""}, - {input: []byte("module gopkg.in/check.v1\n"), expected: "gopkg.in/check.v1"}, - {input: []byte("module \"gopkg.in/check.v1\"\r\n"), expected: "gopkg.in/check.v1"}, - {input: []byte("module gopkg.in/check.v1\r\n"), expected: "gopkg.in/check.v1"}, - {input: []byte("module \"gopkg.in/check.v1\"\n\n"), expected: "gopkg.in/check.v1"}, - {input: []byte("module gopkg.in/check.v1\n\n"), expected: "gopkg.in/check.v1"}, - {input: []byte("module \n\"gopkg.in/check.v1\"\n\n"), expected: ""}, - {input: []byte("module \ngopkg.in/check.v1\n\n"), expected: ""}, - {input: []byte("module \"gopkg.in/check.v1\"asd"), expected: ""}, - {input: []byte("module \n\"gopkg.in/check.v1\"\n\n"), expected: ""}, - {input: []byte("module \ngopkg.in/check.v1\n\n"), expected: ""}, - {input: []byte("module \"gopkg.in/check.v1\"asd"), expected: ""}, - {input: []byte("module \nmodule a/b/c "), expected: "a/b/c"}, - {input: []byte("module \" \""), expected: " "}, - {input: []byte("module "), expected: ""}, - {input: []byte("module \" a/b/c \""), expected: " a/b/c "}, - {input: []byte("module \"github.com/rsc/vgotest1\" // with a comment"), expected: "github.com/rsc/vgotest1"}, -} - -func TestModulePath(t *testing.T) { - for _, test := range modulePathTests { - t.Run(string(test.input), func(t *testing.T) { - result := ModulePath(test.input) - if result != test.expected { - t.Fatalf("ModulePath(%q): %s, want %s", string(test.input), result, test.expected) - } - }) - } -} |