all: skip more memory-intensive tests on linux-arm

Updates golang/go#32834

Change-Id: I9844dc09d9a6eb2e79a0b28a1e69ed018bfa1bff
Reviewed-on: https://go-review.googlesource.com/c/tools/+/192578
Run-TryBot: Bryan C. Mills <bcmills@google.com>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

go/internal/gcimporter/gcimporter_test.go

@@ -23,6 +23,11 @@ import (
 	"golang.org/x/tools/internal/testenv"
 )
 
+func TestMain(m *testing.M) {
+	testenv.ExitIfSmallMachine()
+	os.Exit(m.Run())
+}
+
 // ----------------------------------------------------------------------------
 // The following three functions (Builder, HasGoBuild, MustHaveGoBuild) were
 // copied from $GOROOT/src/internal/testenv since that package is not available

go/loader/loader_test.go

@@ -13,6 +13,7 @@ import (
 	"go/build"
 	"go/constant"
 	"go/types"
+	"os"
 	"path/filepath"
 	"reflect"
 	"runtime"
@@ -23,8 +24,14 @@ import (
 
 	"golang.org/x/tools/go/buildutil"
 	"golang.org/x/tools/go/loader"
+	"golang.org/x/tools/internal/testenv"
 )
 
+func TestMain(m *testing.M) {
+	testenv.ExitIfSmallMachine()
+	os.Exit(m.Run())
+}
+
 // TestFromArgs checks that conf.FromArgs populates conf correctly.
 // It does no I/O.
 func TestFromArgs(t *testing.T) {

go/packages/packages_test.go

@@ -28,11 +28,7 @@ import (
 )
 
 func TestMain(m *testing.M) {
-	if os.Getenv("GO_BUILDER_NAME") == "linux-arm" {
-		fmt.Fprintf(os.Stderr, "skipping test: linux-arm builder lacks sufficient memory (https://golang.org/issue/32834)\n")
-		os.Exit(0)
-	}
-
+	testenv.ExitIfSmallMachine()
 	os.Exit(m.Run())
 }
 

internal/imports/imports_test.go

@@ -2,9 +2,17 @@ package imports
 
 import (
 	"go/build"
+	"os"
 	"testing"
+
+	"golang.org/x/tools/internal/testenv"
 )
 
+func TestMain(m *testing.M) {
+	testenv.ExitIfSmallMachine()
+	os.Exit(m.Run())
+}
+
 // TestNilOpts tests that process does not crash with nil opts.
 func TestNilOpts(t *testing.T) {
 	var testOpts = []struct {

internal/lsp/cmd/cmd_test.go

@@ -7,7 +7,6 @@ package cmd_test
 import (
 	"bytes"
 	"context"
-	"fmt"
 	"io/ioutil"
 	"os"
 	"path/filepath"
@@ -17,14 +16,11 @@ import (
 
 	"golang.org/x/tools/go/packages/packagestest"
 	"golang.org/x/tools/internal/lsp/tests"
+	"golang.org/x/tools/internal/testenv"
 )
 
 func TestMain(m *testing.M) {
-	if os.Getenv("GO_BUILDER_NAME") == "linux-arm" {
-		fmt.Fprintf(os.Stderr, "skipping test: linux-arm builder lacks sufficient memory (https://golang.org/issue/32834)\n")
-		os.Exit(0)
-	}
-
+	testenv.ExitIfSmallMachine()
 	os.Exit(m.Run())
 }
 

internal/lsp/lsp_test.go

@@ -23,14 +23,11 @@ import (
 	"golang.org/x/tools/internal/lsp/source"
 	"golang.org/x/tools/internal/lsp/tests"
 	"golang.org/x/tools/internal/span"
+	"golang.org/x/tools/internal/testenv"
 )
 
 func TestMain(m *testing.M) {
-	if os.Getenv("GO_BUILDER_NAME") == "linux-arm" {
-		fmt.Fprintf(os.Stderr, "skipping test: linux-arm builder lacks sufficient memory (https://golang.org/issue/32834)\n")
-		os.Exit(0)
-	}
-
+	testenv.ExitIfSmallMachine()
 	os.Exit(m.Run())
 }
 

internal/lsp/source/source_test.go

@@ -8,6 +8,7 @@ import (
 	"bytes"
 	"context"
 	"fmt"
+	"os"
 	"os/exec"
 	"path/filepath"
 	"sort"
@@ -22,8 +23,14 @@ import (
 	"golang.org/x/tools/internal/lsp/source"
 	"golang.org/x/tools/internal/lsp/tests"
 	"golang.org/x/tools/internal/span"
+	"golang.org/x/tools/internal/testenv"
 )
 
+func TestMain(m *testing.M) {
+	testenv.ExitIfSmallMachine()
+	os.Exit(m.Run())
+}
+
 func TestSource(t *testing.T) {
 	packagestest.TestAll(t, testSource)
 }

internal/testenv/testenv.go

@@ -7,6 +7,7 @@
 package testenv
 
 import (
+	"fmt"
 	"os"
 	"os/exec"
 	"runtime"
@@ -106,3 +107,14 @@ func NeedsGoPackagesEnv(t Testing, env []string) {
 
 	NeedsGoPackages(t)
 }
+
+// ExitIfSmallMachine emits a helpful diagnostic and calls os.Exit(0) if the
+// current machine is a builder known to have scarce resources.
+//
+// It should be called from within a TestMain function.
+func ExitIfSmallMachine() {
+	if os.Getenv("GO_BUILDER_NAME") == "linux-arm" {
+		fmt.Fprintln(os.Stderr, "skipping test: linux-arm builder lacks sufficient memory (https://golang.org/issue/32834)")
+		os.Exit(0)
+	}
+}