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// 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 analysistest_test
import (
"fmt"
"log"
"os"
"reflect"
"strings"
"testing"
"golang.org/x/tools/go/analysis/analysistest"
"golang.org/x/tools/go/analysis/passes/findcall"
"golang.org/x/tools/internal/testenv"
)
func init() {
// This test currently requires GOPATH mode.
// Explicitly disabling module mode should suffice, but
// we'll also turn off GOPROXY just for good measure.
if err := os.Setenv("GO111MODULE", "off"); err != nil {
log.Fatal(err)
}
if err := os.Setenv("GOPROXY", "off"); err != nil {
log.Fatal(err)
}
}
// TestTheTest tests the analysistest testing infrastructure.
func TestTheTest(t *testing.T) {
testenv.NeedsTool(t, "go")
// We'll simulate a partly failing test of the findcall analysis,
// which (by default) reports calls to functions named 'println'.
findcall.Analyzer.Flags.Set("name", "println")
filemap := map[string]string{
"a/b.go": `package main // want package:"found"
func main() {
// The expectation is ill-formed:
print() // want: "diagnostic"
print() // want foo"fact"
print() // want foo:
print() // want "\xZZ scan error"
// A diagnostic is reported at this line, but the expectation doesn't match:
println("hello, world") // want "wrong expectation text"
// An unexpected diagnostic is reported at this line:
println() // trigger an unexpected diagnostic
// No diagnostic is reported at this line:
print() // want "unsatisfied expectation"
// OK
println("hello, world") // want "call of println"
// OK /* */-form.
println("안녕, 세계") /* want "call of println" */
// OK (nested comment)
println("Γειά σου, Κόσμε") // some comment // want "call of println"
// OK (nested comment in /**/)
println("你好，世界") /* some comment // want "call of println" */
// OK (multiple expectations on same line)
println(); println() // want "call of println(...)" "call of println(...)"
}
// OK (facts and diagnostics on same line)
func println(...interface{}) { println() } // want println:"found" "call of println(...)"
`,
"a/b.go.golden": `package main // want package:"found"
func main() {
// The expectation is ill-formed:
print() // want: "diagnostic"
print() // want foo"fact"
print() // want foo:
print() // want "\xZZ scan error"
// A diagnostic is reported at this line, but the expectation doesn't match:
println_TEST_("hello, world") // want "wrong expectation text"
// An unexpected diagnostic is reported at this line:
println_TEST_() // trigger an unexpected diagnostic
// No diagnostic is reported at this line:
print() // want "unsatisfied expectation"
// OK
println_TEST_("hello, world") // want "call of println"
// OK /* */-form.
println_TEST_("안녕, 세계") /* want "call of println" */
// OK (nested comment)
println_TEST_("Γειά σου, Κόσμε") // some comment // want "call of println"
// OK (nested comment in /**/)
println_TEST_("你好，世界") /* some comment // want "call of println" */
// OK (multiple expectations on same line)
println_TEST_()
println_TEST_() // want "call of println(...)" "call of println(...)"
}
// OK (facts and diagnostics on same line)
func println(...interface{}) { println_TEST_() } // want println:"found" "call of println(...)"
`,
"a/b_test.go": `package main
// Test file shouldn't mess with things (issue #40574)
`,
}
dir, cleanup, err := analysistest.WriteFiles(filemap)
if err != nil {
t.Fatal(err)
}
defer cleanup()
var got []string
t2 := errorfunc(func(s string) { got = append(got, s) }) // a fake *testing.T
analysistest.RunWithSuggestedFixes(t2, dir, findcall.Analyzer, "a")
want := []string{
`a/b.go:5: in 'want' comment: unexpected ":"`,
`a/b.go:6: in 'want' comment: got String after foo, want ':'`,
`a/b.go:7: in 'want' comment: got EOF, want regular expression`,
`a/b.go:8: in 'want' comment: invalid char escape`,
"a/b.go:11:9: diagnostic \"call of println(...)\" does not match pattern `wrong expectation text`",
`a/b.go:14:9: unexpected diagnostic: call of println(...)`,
"a/b.go:11: no diagnostic was reported matching `wrong expectation text`",
"a/b.go:17: no diagnostic was reported matching `unsatisfied expectation`",
// duplicate copies of each message from the test package (see issue #40574)
`a/b.go:5: in 'want' comment: unexpected ":"`,
`a/b.go:6: in 'want' comment: got String after foo, want ':'`,
`a/b.go:7: in 'want' comment: got EOF, want regular expression`,
`a/b.go:8: in 'want' comment: invalid char escape`,
"a/b.go:11:9: diagnostic \"call of println(...)\" does not match pattern `wrong expectation text`",
`a/b.go:14:9: unexpected diagnostic: call of println(...)`,
"a/b.go:11: no diagnostic was reported matching `wrong expectation text`",
"a/b.go:17: no diagnostic was reported matching `unsatisfied expectation`",
}
if !reflect.DeepEqual(got, want) {
t.Errorf("got:\n%s\nwant:\n%s",
strings.Join(got, "\n"),
strings.Join(want, "\n"))
}
}
type errorfunc func(string)
func (f errorfunc) Errorf(format string, args ...interface{}) {
f(fmt.Sprintf(format, args...))
}
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