81 lines
1.5 KiB
Go
81 lines
1.5 KiB
Go
package common
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import (
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"context"
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"errors"
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"fmt"
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"testing"
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"github.com/stretchr/testify/assert"
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)
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func throwNil(ctx context.Context) error {
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var x *int = nil
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*x = 5
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return nil
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}
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func runTest(t *testing.T, ctx context.Context, testCase int) (result error) {
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t.Helper()
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defer func() {
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if r := recover(); r != nil {
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switch x := r.(type) {
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case string:
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result = errors.New(x)
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case error:
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result = x
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default:
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result = fmt.Errorf("unknown panic in runTest/%d", testCase)
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}
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}
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}()
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errC := make(chan error)
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switch testCase {
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case 0:
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_ = throwNil(ctx) // fall into defer above
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case 1:
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RunWithScissors(ctx, errC, "test1Thread", throwNil)
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case 2:
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RunWithScissors(ctx, errC, "test2Thread", func(ctx context.Context) error {
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<-ctx.Done()
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return nil
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})
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_ = throwNil(ctx)
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case 3:
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go func() { _ = throwNil(ctx) }() // uncatchable
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}
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select {
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case <-ctx.Done():
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return ctx.Err()
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case err := <-errC:
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return err
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}
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}
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func TestSupervisor(t *testing.T) {
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for i := 0; i < 3; i++ {
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t.Run(fmt.Sprintf("%d", i), func(t *testing.T) {
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rootCtx := context.Background()
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ctx, fn := context.WithCancel(rootCtx)
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err := runTest(t, ctx, i)
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switch i {
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case 0:
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assert.EqualError(t, err, "runtime error: invalid memory address or nil pointer dereference")
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case 1:
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assert.EqualError(t, err, "test1Thread: runtime error: invalid memory address or nil pointer dereference")
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case 2:
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assert.EqualError(t, err, "runtime error: invalid memory address or nil pointer dereference")
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}
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fn()
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},
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)
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}
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}
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