_test: add test for issue317 (#322)

Refs #317

Makefile

@@ -19,6 +19,7 @@ test-master:
 	cd _test/install/gitclone && docker build --no-cache .
 	cd _test/regress/issue103 && docker build --no-cache .
 	cd _test/regress/issue193 && docker build --no-cache .
+	cd _test/regress/issue317 && docker build --no-cache .
 	@echo "everything is OK"
 
 test-release:

_test/regress/issue317/Dockerfile

@@ -0,0 +1,5 @@
+FROM golang:1.16-alpine AS build
+
+COPY . /root
+
+RUN /root/test.bash

_test/regress/issue317/expected.txt

@@ -0,0 +1,2 @@
+/root/target.go:11:2: uncheckedTypeAssert: avoid unchecked type assertions as they can panic (rules.go:27)
+/root/target.go:13:19: badCond: statement always true (diag.go:14)

_test/regress/issue317/go.mod

@@ -0,0 +1,3 @@
+module issue317
+
+go 1.17

_test/regress/issue317/rules.go

@@ -0,0 +1,15 @@
+//go:build ignore
+// +build ignore
+
+package main
+
+import (
+	"github.com/quasilyte/go-ruleguard/dsl"
+	corerules "github.com/quasilyte/go-ruleguard/rules"
+	uber "github.com/quasilyte/uber-rules"
+)
+
+func init() {
+	dsl.ImportRules("", corerules.Bundle)
+	dsl.ImportRules("", uber.Bundle)
+}

_test/regress/issue317/target.go

@@ -0,0 +1,14 @@
+package main
+
+import (
+	"fmt"
+	"strings"
+)
+
+func main() {
+	var k interface{}
+
+	msg := k.(string) // expects warning
+
+	fmt.Println(msg, strings.Count("foo", "bar") >= 0)
+}

_test/regress/issue317/test.bash

@@ -0,0 +1,18 @@
+set -e
+
+apk update && apk add git
+
+cd /root
+
+GO111MODULE=on go get -v github.com/quasilyte/go-ruleguard/cmd/ruleguard@master
+go get -v github.com/quasilyte/go-ruleguard/dsl
+go get -v github.com/quasilyte/uber-rules
+go get -v github.com/quasilyte/go-ruleguard/rules
+# Try running with different rules file order.
+
+export CGO_ENABLED=0
+
+ruleguard -rules rules.go . > actual.txt 2>&1 || true
+diff -u actual.txt /root/expected.txt
+
+echo SUCCESS