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https://github.com/golang/go
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8e53eb937b
Supporting user-defined TestMain functions requires that we generate a
"testmain" package for each testable package, rather than a single one
for the entire program. This entails these API changes:
1. (*ssa.Program).{CreateTestMainPackage,FindTests} both now
accept only a single package. Existing clients that pass them
multiple packages must call them from a loop.
2. (*ssa.Program).FindTests returns an additional result, the the
optional TestMain *ssa.Function. Existing clients may discard it.
Also:
- Test the new logic using the SSA interpreter
- add ssautil.MainPackages helper
- callgraph: allow multiple main packages, and analyze them all
- ssadump -run: allow multiple main/test packages, and run each in a new interpreter
- minor simplifications to some callers (e.g. guru)
Fixes golang/go#9553
Change-Id: Ia7de9bd27448fb08b8d172ba5cdbcf37a762b7a0
Reviewed-on: https://go-review.googlesource.com/25102
Reviewed-by: Robert Griesemer <gri@golang.org>
82 lines
1.9 KiB
Go
82 lines
1.9 KiB
Go
// Copyright 2014 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// No testdata on Android.
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// +build !android
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package main
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import (
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"bytes"
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"fmt"
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"go/build"
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"reflect"
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"sort"
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"strings"
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"testing"
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)
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func TestCallgraph(t *testing.T) {
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ctxt := build.Default // copy
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ctxt.GOPATH = "testdata"
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const format = "{{.Caller}} --> {{.Callee}}"
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for _, test := range []struct {
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algo, format string
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tests bool
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want []string
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}{
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{"rta", format, false, []string{
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// rta imprecisely shows cross product of {main,main2} x {C,D}
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`pkg.main --> (pkg.C).f`,
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`pkg.main --> (pkg.D).f`,
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`pkg.main --> pkg.main2`,
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`pkg.main2 --> (pkg.C).f`,
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`pkg.main2 --> (pkg.D).f`,
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}},
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{"pta", format, false, []string{
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// pta distinguishes main->C, main2->D. Also has a root node.
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`<root> --> pkg.init`,
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`<root> --> pkg.main`,
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`pkg.main --> (pkg.C).f`,
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`pkg.main --> pkg.main2`,
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`pkg.main2 --> (pkg.D).f`,
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}},
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// tests: main is not called.
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{"rta", format, true, []string{
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`pkg$testmain.init --> pkg.init`,
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`pkg.Example --> (pkg.C).f`,
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}},
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{"pta", format, true, []string{
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`<root> --> pkg$testmain.init`,
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`<root> --> pkg.Example`,
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`pkg$testmain.init --> pkg.init`,
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`pkg.Example --> (pkg.C).f`,
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}},
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} {
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stdout = new(bytes.Buffer)
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if err := doCallgraph(&ctxt, test.algo, test.format, test.tests, []string{"pkg"}); err != nil {
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t.Error(err)
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continue
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}
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got := sortedLines(fmt.Sprint(stdout))
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if !reflect.DeepEqual(got, test.want) {
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t.Errorf("callgraph(%q, %q, %t):\ngot:\n%s\nwant:\n%s",
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test.algo, test.format, test.tests,
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strings.Join(got, "\n"),
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strings.Join(test.want, "\n"))
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}
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}
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}
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func sortedLines(s string) []string {
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s = strings.TrimSpace(s)
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lines := strings.Split(s, "\n")
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sort.Strings(lines)
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return lines
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}
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