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https://github.com/hyperledger/fabric-samples.git
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06c7445e91
Starting from the processor.Block.Process all methods now return errors if something goes wrong with unpacking of the blocks and reading the transactions. In each function where the error is being propagated back to client it is wrapped in a message with the function name. This makes it easier to track down the error and see the propagation chain. Finally the error is logged to the terminal and the go routine shuts down gracefully. The graceful shutdown executes all deferred functions which close the context, the checkpointer and the gateway. Before panics were used everywhere which was an issue because the unpacking of the blocks happened in a go routine. When a panic happens in a go routine only the deferred functions of the go routine are called but not those of the client which lead to unexpected behavior. The transact function is also executed in a go routine therefore the same typo of error handling was implemented there. Signed-off-by: Stanislav Jakuschevskij <stas@two-giants.com>
100 lines
2.4 KiB
Go
100 lines
2.4 KiB
Go
package utils_test
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import (
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"errors"
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"offChainData/utils"
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"testing"
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)
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func Test_cachePrimitiveFunctionResult(t *testing.T) {
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counter := 0
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f := func() (int, error) {
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counter++
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return 5, nil
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}
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cachedFunc := utils.Cache(f)
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result1, err := cachedFunc()
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if err != nil {
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t.Fatal("unexpected error:", err)
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}
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result2, err := cachedFunc()
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if err != nil {
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t.Fatal("unexpected error:", err)
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}
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if counter != 1 {
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t.Error("expected counter to be 1, but got", counter)
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}
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if result1 != 5 || result2 != 5 {
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t.Fatal("expected results to be 5, but got", result1, result2)
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}
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}
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func Test_whenCachedFunctionsErrors_returnError(t *testing.T) {
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errorMsg := "error"
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f := func() (int, error) {
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return 0, errors.New(errorMsg)
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}
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cachedFunc := utils.Cache(f)
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_, err := cachedFunc()
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if err == nil {
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t.Fatal("expected error, but got", err)
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}
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if err.Error() != errorMsg {
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t.Fatal("expected error message to be 'error', but got", err)
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}
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}
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func Test_cacheWrappedPrimitiveFunctionResult(t *testing.T) {
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controlValue := 5
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multiplyControlValueBy := func(n int) (int, error) { controlValue *= n; return controlValue, nil }
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cachedFunc := utils.Cache(func() (int, error) { return multiplyControlValueBy(5) })
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result1, err := cachedFunc()
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if err != nil {
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t.Fatal("unexpected error:", err)
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}
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result2, err := cachedFunc()
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if err != nil {
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t.Fatal("unexpected error:", err)
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}
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if controlValue != 25 {
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t.Error("expected control value to be 25, but got", controlValue)
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}
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if result1 != 25 || result2 != 25 {
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t.Fatal("expected cached results to be 25, but got", result1, result2)
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}
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}
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func Test_cacheWrappedDataStructureResult(t *testing.T) {
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type GreetMe struct {
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helloTo string
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}
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controlStruct := &GreetMe{helloTo: "Hello "}
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greet := func(name string) (*GreetMe, error) { controlStruct.helloTo += name; return controlStruct, nil }
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cachedFunc := utils.Cache(func() (*GreetMe, error) { return greet("John Doe") })
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result1, err := cachedFunc()
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if err != nil {
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t.Fatal("unexpected error:", err)
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}
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result2, err := cachedFunc()
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if err != nil {
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t.Fatal("unexpected error:", err)
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}
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if controlStruct.helloTo != "Hello John Doe" {
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t.Error("expected control value to be 'Hello John Doe', but got", controlStruct)
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}
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if result1.helloTo != "Hello John Doe" || result2.helloTo != "Hello John Doe" {
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t.Fatal("expected cached results to be 'Hello John Doe', but got", result1.helloTo, result2.helloTo)
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}
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}
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