cmd/go: convert some cgo-related testcases to script framework

This change converts TestCoverageWithCgo and TestCgoConsistentResults
to the script framework.

Change-Id: Ic5a13f6dd6099d3d73a5cda8cbc724a79a3d2c58
Reviewed-on: https://go-review.googlesource.com/c/go/+/212621
Run-TryBot: Michael Matloob <[email protected]>
Reviewed-by: Jay Conrod <[email protected]>

Author: matloob

src/cmd/go/go_test.go

@@ -2311,39 +2311,6 @@ func main() {
 	tg.grepStderrNot(`os.Stat .* no such file or directory`, "unexpected stat of archive file")
 }
 
-func TestCoverageWithCgo(t *testing.T) {
-	skipIfGccgo(t, "gccgo has no cover tool")
-	tooSlow(t)
-	if !canCgo {
-		t.Skip("skipping because cgo not enabled")
-	}
-
-	for _, dir := range []string{"cgocover", "cgocover2", "cgocover3", "cgocover4"} {
-		t.Run(dir, func(t *testing.T) {
-			tg := testgo(t)
-			tg.parallel()
-			defer tg.cleanup()
-			tg.setenv("GOPATH", filepath.Join(tg.pwd(), "testdata"))
-			tg.run("test", "-short", "-cover", dir)
-			data := tg.getStdout() + tg.getStderr()
-			checkCoverage(tg, data)
-		})
-	}
-}
-
-func TestCgoAsmError(t *testing.T) {
-	if !canCgo {
-		t.Skip("skipping because cgo not enabled")
-	}
-
-	tg := testgo(t)
-	tg.parallel()
-	defer tg.cleanup()
-	tg.setenv("GOPATH", filepath.Join(tg.pwd(), "testdata"))
-	tg.runFail("build", "cgoasm")
-	tg.grepBoth("package using cgo has Go assembly file", "did not detect Go assembly file")
-}
-
 func TestCgoDependsOnSyscall(t *testing.T) {
 	if testing.Short() {
 		t.Skip("skipping test that removes $GOROOT/pkg/*_race in short mode")

src/cmd/go/testdata/script/cgo_asm_error.txt

@@ -0,0 +1,21 @@
+[!cgo] skip
+
+# Test that cgo package can't contain a go assembly file.
+
+# Ensure the build fails and reports that the package has a Go assembly file.
+! go build cgoasm
+stderr 'package using cgo has Go assembly file'
+
+-- cgoasm/p.go --
+package p
+
+/*
+// hi
+*/
+import "C"
+
+func F() {}
+-- cgoasm/p.s --
+TEXT asm(SB),$0
+	RET
+

src/cmd/go/testdata/script/cover_cgo.txt

@@ -0,0 +1,37 @@
+[!cgo] skip
+[gccgo] skip # gccgo has no cover tool
+
+# Test coverage on cgo code.
+
+go test -short -cover cgocover
+stdout  'coverage:.*[1-9][0-9.]+%'
+! stderr '[^0-9]0\.0%'
+
+-- cgocover/p.go --
+package p
+
+/*
+void
+f(void)
+{
+}
+*/
+import "C"
+
+var b bool
+
+func F() {
+	if b {
+		for {
+		}
+	}
+	C.f()
+}
+-- cgocover/p_test.go --
+package p
+
+import "testing"
+
+func TestF(t *testing.T) {
+	F()
+}

src/cmd/go/testdata/script/cover_cgo_extra_file.txt

@@ -0,0 +1,43 @@
+[!cgo] skip
+[gccgo] skip # gccgo has no cover tool
+
+# Test coverage on cgo code. This test case includes an
+# extra empty non-cgo file in the package being checked.
+
+go test -short -cover cgocover4
+stdout  'coverage:.*[1-9][0-9.]+%'
+! stderr '[^0-9]0\.0%'
+
+-- cgocover4/notcgo.go --
+package p
+-- cgocover4/p.go --
+package p
+
+/*
+void
+f(void)
+{
+}
+*/
+import "C"
+
+var b bool
+
+func F() {
+	if b {
+		for {
+		}
+	}
+	C.f()
+}
+-- cgocover4/x_test.go --
+package p_test
+
+import (
+	. "cgocover4"
+	"testing"
+)
+
+func TestF(t *testing.T) {
+	F()
+}

src/cmd/go/testdata/script/cover_cgo_extra_test.txt

@@ -0,0 +1,44 @@
+[!cgo] skip
+[gccgo] skip # gccgo has no cover tool
+
+# Test coverage on cgo code. This test case has an external
+# test that tests the code and an in-package test file with
+# no test cases.
+
+go test -short -cover cgocover3
+stdout  'coverage:.*[1-9][0-9.]+%'
+! stderr '[^0-9]0\.0%'
+
+-- cgocover3/p.go --
+package p
+
+/*
+void
+f(void)
+{
+}
+*/
+import "C"
+
+var b bool
+
+func F() {
+	if b {
+		for {
+		}
+	}
+	C.f()
+}
+-- cgocover3/p_test.go --
+package p
+-- cgocover3/x_test.go --
+package p_test
+
+import (
+	. "cgocover3"
+	"testing"
+)
+
+func TestF(t *testing.T) {
+	F()
+}

src/cmd/go/testdata/script/cover_cgo_xtest.txt

@@ -0,0 +1,40 @@
+[!cgo] skip
+[gccgo] skip # gccgo has no cover tool
+
+# Test cgo coverage with an external test.
+
+go test -short -cover cgocover2
+stdout  'coverage:.*[1-9][0-9.]+%'
+! stderr '[^0-9]0\.0%'
+
+-- cgocover2/p.go --
+package p
+
+/*
+void
+f(void)
+{
+}
+*/
+import "C"
+
+var b bool
+
+func F() {
+	if b {
+		for {
+		}
+	}
+	C.f()
+}
+-- cgocover2/x_test.go --
+package p_test
+
+import (
+	. "cgocover2"
+	"testing"
+)
+
+func TestF(t *testing.T) {
+	F()
+}