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testscript: merge coverage from all test binary executions
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Original file line number | Diff line number | Diff line change |
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unquote scripts/exec.txt | ||
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# The module uses testscript itself. | ||
# Use the checkec out module, based on where the test binary ran. | ||
go mod edit -replace=github.com/rogpeppe/go-internal=${GOINTERNAL_MODULE} | ||
go mod tidy | ||
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# First, a 'go test' run without coverage. | ||
go test -vet=off | ||
stdout 'PASS' | ||
! stdout 'total coverage' | ||
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# Then, a 'go test' run with -coverprofile. | ||
# Assuming testscript works well, this results in the basic coverage being 0%, | ||
# since the test binary does not directly run any non-test code. | ||
# The total coverage after merging profiles should end up being 100%, | ||
# as long as all three sub-profiles are accounted for. | ||
# Marking all printlns as covered requires all edge cases to work well. | ||
go test -vet=off -coverprofile=cover.out -v | ||
stdout 'PASS' | ||
stdout '^coverage: 0\.0%' | ||
stdout '^total coverage: 100\.0%' | ||
! stdout 'malformed coverage' # written by "go test" if cover.out is invalid | ||
exists cover.out | ||
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-- go.mod -- | ||
module test | ||
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go 1.15 | ||
-- foo.go -- | ||
package foo | ||
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import "os" | ||
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func foo1() int { | ||
switch os.Args[1] { | ||
case "1": | ||
println("first path") | ||
case "2": | ||
println("second path") | ||
default: | ||
println("third path") | ||
} | ||
return 1 | ||
} | ||
-- foo_test.go -- | ||
package foo | ||
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import ( | ||
"os" | ||
"testing" | ||
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"github.com/rogpeppe/go-internal/gotooltest" | ||
"github.com/rogpeppe/go-internal/testscript" | ||
) | ||
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func TestMain(m *testing.M) { | ||
os.Exit(testscript.RunMain(m, map[string] func() int{ | ||
"foo": foo1, | ||
})) | ||
} | ||
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func TestFoo(t *testing.T) { | ||
p := testscript.Params{ | ||
Dir: "scripts", | ||
} | ||
if err := gotooltest.Setup(&p); err != nil { | ||
t.Fatal(err) | ||
} | ||
testscript.Run(t, p) | ||
} | ||
-- scripts/exec.txt -- | ||
># Note that foo always fails, to prevent "go build" from doing anything. | ||
> | ||
># Running the command directly; trigger the first path. | ||
>! foo 1 | ||
> | ||
># Running the command via exec; trigger the second path. | ||
>! exec foo 2 | ||
> | ||
># Running the command indirectly, via toolexec; trigger the third path. | ||
>! go build -a -toolexec=foo runtime |
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