expect_test.go

Documentation: golang.org/x/tools/go/packages/packagestest

     1  // Copyright 2018 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 packagestest_test
     6  
     7  import (
     8  	"go/token"
     9  	"testing"
    10  
    11  	"golang.org/x/tools/go/expect"
    12  	"golang.org/x/tools/go/packages/packagestest"
    13  )
    14  
    15  func TestExpect(t *testing.T) {
    16  	exported := packagestest.Export(t, packagestest.GOPATH, []packagestest.Module{{
    17  		Name:  "golang.org/fake",
    18  		Files: packagestest.MustCopyFileTree("testdata"),
    19  	}})
    20  	defer exported.Cleanup()
    21  	checkCount := 0
    22  	if err := exported.Expect(map[string]interface{}{
    23  		"check": func(src, target token.Position) {
    24  			checkCount++
    25  		},
    26  		"boolArg": func(n *expect.Note, yes, no bool) {
    27  			if !yes {
    28  				t.Errorf("Expected boolArg first param to be true")
    29  			}
    30  			if no {
    31  				t.Errorf("Expected boolArg second param to be false")
    32  			}
    33  		},
    34  		"intArg": func(n *expect.Note, i int64) {
    35  			if i != 42 {
    36  				t.Errorf("Expected intarg to be 42")
    37  			}
    38  		},
    39  		"stringArg": func(n *expect.Note, name expect.Identifier, value string) {
    40  			if string(name) != value {
    41  				t.Errorf("Got string arg %v expected %v", value, name)
    42  			}
    43  		},
    44  		"directNote": func(n *expect.Note) {},
    45  		"range": func(r packagestest.Range) {
    46  			if r.Start == token.NoPos || r.Start == 0 {
    47  				t.Errorf("Range had no valid starting position")
    48  			}
    49  			if r.End == token.NoPos || r.End == 0 {
    50  				t.Errorf("Range had no valid ending position")
    51  			} else if r.End <= r.Start {
    52  				t.Errorf("Range ending was not greater than start")
    53  			}
    54  		},
    55  		"checkEOF": func(n *expect.Note, p token.Pos) {
    56  			if p <= n.Pos {
    57  				t.Errorf("EOF was before the checkEOF note")
    58  			}
    59  		},
    60  	}); err != nil {
    61  		t.Fatal(err)
    62  	}
    63  	// We expect to have walked the @check annotations in all .go files,
    64  	// including _test.go files (XTest or otherwise). But to have walked the
    65  	// non-_test.go files only once. Hence wantCheck = 3 (testdata/test.go) + 1
    66  	// (testdata/test_test.go) + 1 (testdata/x_test.go)
    67  	wantCheck := 7
    68  	if wantCheck != checkCount {
    69  		t.Fatalf("Expected @check count of %v; got %v", wantCheck, checkCount)
    70  	}
    71  }
    72
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