analysis_test.go

package main

import (
	"fmt"
	"os"
	"runtime/debug"
	"strings"
	"testing"

	"golang.org/x/tools/go/analysis"
	"golang.org/x/tools/go/analysis/checker"
	"golang.org/x/tools/go/analysis/passes/appends"
	"golang.org/x/tools/go/analysis/passes/asmdecl"
	"golang.org/x/tools/go/analysis/passes/assign"
	"golang.org/x/tools/go/analysis/passes/atomic"
	"golang.org/x/tools/go/analysis/passes/atomicalign"
	"golang.org/x/tools/go/analysis/passes/bools"
	"golang.org/x/tools/go/analysis/passes/buildssa"
	"golang.org/x/tools/go/analysis/passes/buildtag"
	"golang.org/x/tools/go/analysis/passes/cgocall"
	"golang.org/x/tools/go/analysis/passes/composite"
	"golang.org/x/tools/go/analysis/passes/copylock"
	"golang.org/x/tools/go/analysis/passes/ctrlflow"
	"golang.org/x/tools/go/analysis/passes/deepequalerrors"
	"golang.org/x/tools/go/analysis/passes/defers"
	"golang.org/x/tools/go/analysis/passes/directive"
	"golang.org/x/tools/go/analysis/passes/errorsas"
	"golang.org/x/tools/go/analysis/passes/findcall"
	"golang.org/x/tools/go/analysis/passes/framepointer"
	"golang.org/x/tools/go/analysis/passes/httpmux"
	"golang.org/x/tools/go/analysis/passes/httpresponse"
	"golang.org/x/tools/go/analysis/passes/ifaceassert"
	"golang.org/x/tools/go/analysis/passes/inspect"
	"golang.org/x/tools/go/analysis/passes/loopclosure"
	"golang.org/x/tools/go/analysis/passes/lostcancel"
	"golang.org/x/tools/go/analysis/passes/nilfunc"
	"golang.org/x/tools/go/analysis/passes/nilness"
	"golang.org/x/tools/go/analysis/passes/pkgfact"
	"golang.org/x/tools/go/analysis/passes/printf"
	"golang.org/x/tools/go/analysis/passes/reflectvaluecompare"
	"golang.org/x/tools/go/analysis/passes/shadow"
	"golang.org/x/tools/go/analysis/passes/shift"
	"golang.org/x/tools/go/analysis/passes/sigchanyzer"
	"golang.org/x/tools/go/analysis/passes/slog"
	"golang.org/x/tools/go/analysis/passes/sortslice"
	"golang.org/x/tools/go/analysis/passes/stdmethods"
	"golang.org/x/tools/go/analysis/passes/stdversion"
	"golang.org/x/tools/go/analysis/passes/stringintconv"
	"golang.org/x/tools/go/analysis/passes/structtag"
	"golang.org/x/tools/go/analysis/passes/testinggoroutine"
	"golang.org/x/tools/go/analysis/passes/tests"
	"golang.org/x/tools/go/analysis/passes/timeformat"
	"golang.org/x/tools/go/analysis/passes/unmarshal"
	"golang.org/x/tools/go/analysis/passes/unreachable"
	"golang.org/x/tools/go/analysis/passes/unsafeptr"
	"golang.org/x/tools/go/analysis/passes/unusedresult"
	"golang.org/x/tools/go/analysis/passes/unusedwrite"
	"golang.org/x/tools/go/analysis/passes/usesgenerics"
	"golang.org/x/tools/go/analysis/passes/waitgroup"
	"golang.org/x/tools/go/packages"
)

func TestAnalysis(t *testing.T) {
	bi, ok := debug.ReadBuildInfo()
	if !ok {
		t.Fatal("failed to read build info")
	}
	module := bi.Main.Path + "/..."

	pkgs, err := packages.Load(&packages.Config{
		Mode:    packages.LoadAllSyntax,
		Context: t.Context(),
	}, module)
	if err != nil {
		t.Fatalf("load packages %v: %v", module, err)
	}

	g, err := checker.Analyze([]*analysis.Analyzer{
		appends.Analyzer,
		asmdecl.Analyzer,
		assign.Analyzer,
		atomic.Analyzer,
		atomicalign.Analyzer,
		bools.Analyzer,
		buildssa.Analyzer,
		buildtag.Analyzer,
		cgocall.Analyzer,
		composite.Analyzer,
		copylock.Analyzer,
		ctrlflow.Analyzer,
		deepequalerrors.Analyzer,
		defers.Analyzer,
		directive.Analyzer,
		errorsas.Analyzer,
		// fieldalignment.Analyzer,
		findcall.Analyzer,
		framepointer.Analyzer,
		httpmux.Analyzer,
		httpresponse.Analyzer,
		ifaceassert.Analyzer,
		inspect.Analyzer,
		loopclosure.Analyzer,
		lostcancel.Analyzer,
		nilfunc.Analyzer,
		nilness.Analyzer,
		pkgfact.Analyzer,
		printf.Analyzer,
		reflectvaluecompare.Analyzer,
		shadow.Analyzer,
		shift.Analyzer,
		sigchanyzer.Analyzer,
		slog.Analyzer,
		sortslice.Analyzer,
		stdmethods.Analyzer,
		stdversion.Analyzer,
		stringintconv.Analyzer,
		structtag.Analyzer,
		testinggoroutine.Analyzer,
		tests.Analyzer,
		timeformat.Analyzer,
		unmarshal.Analyzer,
		unreachable.Analyzer,
		unsafeptr.Analyzer,
		unusedresult.Analyzer,
		unusedwrite.Analyzer,
		usesgenerics.Analyzer,
		waitgroup.Analyzer,
	},
		pkgs,
		&checker.Options{
			SanityCheck: true,
		})
	if err != nil {
		t.Fatalf("run analyzers: %v", err)
	}

	for act := range g.All() {
		if !strings.HasPrefix(act.Package.PkgPath, bi.Main.Path) {
			continue
		}
		name := fmt.Sprintf("%s/%s", act.Analyzer, act.Package)

		generated := make(map[string]bool)

		t.Run(name, func(t *testing.T) {
			if act.Err != nil {
				t.Error(act.Err)
			}

			for _, diag := range act.Diagnostics {
				pos := act.Package.Fset.Position(diag.Pos)

				if _, ok := generated[pos.Filename]; !ok {
					b, err := os.ReadFile(pos.Filename)
					if err != nil {
						t.Errorf("read file %v: %v", pos.Filename, err)
						continue
					}
					generated[pos.Filename] = generatedRe.Match(b)
				}
				if generated[pos.Filename] {
					continue
				}

				t.Errorf("[%v] %s", pos, diag.Message)
			}
		})
	}
}