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

# Test that the test cache is invalidated when -coverpkg dependencies change,
# even when -coverprofile is not specified. This exercises the else-if branch
# in tryCacheWithID that checks covMeta without a cover profile file.

[short] skip
[GODEBUG:gocacheverify=1] skip

# Start with a clean GOCACHE.
env GOCACHE=$WORK/cache

cd proj

# Run tests with -cover and -coverpkg but without -coverprofile.
go test -cover -coverpkg=proj/... ./...
stdout 'coverage:'

# Run again — should be served from cache.
go test -cover -coverpkg=proj/... ./...
stdout '\(cached\)'
stdout 'coverage:'

# Modify a covered package that is not directly under test.
cp ../sub_modified.go sub/sub.go

# Run again — the cache must be invalidated because a covered package changed.
go test -cover -coverpkg=proj/... ./...
! stdout '\(cached\)'
stdout 'coverage:'

-- proj/go.mod --
module proj

go 1.21

-- proj/main.go --
package proj

import "proj/sub"

func Add(a, b int) int {
	return sub.Sub(a, -b)
}

-- proj/main_test.go --
package proj

import "testing"

func TestAdd(t *testing.T) {
	if Add(1, 2) != 3 {
		t.Fatal("expected 3")
	}
}

-- proj/sub/sub.go --
package sub

func Sub(a, b int) int {
	return a - b
}

-- proj/sub/sub_test.go --
package sub

import "testing"

func TestSub(t *testing.T) {
	if Sub(3, 1) != 2 {
		t.Fatal("expected 2")
	}
}

-- sub_modified.go --
package sub

// Added a comment to change the source.

func Sub(a, b int) int {
	return a - b
}