test: approach of getting goroot

.github/workflows/ci.yml

@@ -3,23 +3,6 @@ name: CI
 on: [push, pull_request]
 
 jobs:
-  build-test:
-    name: Build test
-    runs-on: ubuntu-latest
-    strategy:
-      matrix:
-        go-version: [1.16.x, 1.17.x]
-    steps:
-      - name: Checkout code
-        uses: actions/checkout@v2
-
-      - name: Install Go
-        uses: actions/setup-go@v2
-        with:
-          go-version: ${{ matrix.go-version }}
-
-      - name: Build
-        run: go build .
   coverage:
     name: Coverage
     runs-on: ubuntu-latest

decrr_test.go

@@ -3,6 +3,8 @@ package decrr_test
 import (
 	"errors"
 	"os"
+	"os/exec"
+	"strings"
 	"testing"
 
 	"github.com/aldy505/decrr"
@@ -13,11 +15,18 @@ func TestWrap(t *testing.T) {
 	w := decrr.Wrap(x)
 	wd, _ := os.Getwd()
 
+	cmd, err := exec.Command("bash", "-c", "go env | grep GOROOT").CombinedOutput()
+	if err != nil {
+		t.Error(err)
+	}
+
+	gt := strings.Replace(strings.Replace(strings.Replace(string(cmd), "GOROOT=", "", 1), "\"", "", 2), "\n", "", -1)
+
 	var expected string
 	expected += "why does a chicken cross the road?\n\n"
-	expected += "github.com/aldy505/decrr_test.TestWrap " + wd + "/decrr_test.go:13\n"
-	expected += "testing.tRunner /usr/local/go/src/testing/testing.go:1259\n"
-	expected += "runtime.goexit /usr/local/go/src/runtime/asm_amd64.s:1581"
+	expected += "github.com/aldy505/decrr_test.TestWrap " + wd + "/decrr_test.go:15\n"
+	expected += "testing.tRunner " + gt + "/src/testing/testing.go:1259\n"
+	expected += "runtime.goexit " + gt + "/src/runtime/asm_amd64.s:1581"
 
 	if w.Error() != expected {
 		t.Error("different than expected:", w.Error(), "\nexpected:", expected)