91 lines
1.7 KiB
CoffeeScript
91 lines
1.7 KiB
CoffeeScript
# Exception Handling
|
|
# ------------------
|
|
|
|
# shared nonce
|
|
nonce = {}
|
|
|
|
|
|
#### Throw
|
|
|
|
test "basic exception throwing", ->
|
|
throws (-> throw 'error'), 'error'
|
|
|
|
|
|
#### Empty Try/Catch/Finally
|
|
|
|
test "try can exist alone", ->
|
|
try
|
|
|
|
test "try/catch with empty try, empty catch", ->
|
|
try
|
|
# nothing
|
|
catch err
|
|
# nothing
|
|
|
|
test "single-line try/catch with empty try, empty catch", ->
|
|
try catch err
|
|
|
|
test "try/finally with empty try, empty finally", ->
|
|
try
|
|
# nothing
|
|
finally
|
|
# nothing
|
|
|
|
test "single-line try/finally with empty try, empty finally", ->
|
|
try finally
|
|
|
|
test "try/catch/finally with empty try, empty catch, empty finally", ->
|
|
try
|
|
catch err
|
|
finally
|
|
|
|
test "single-line try/catch/finally with empty try, empty catch, empty finally", ->
|
|
try catch err then finally
|
|
|
|
|
|
#### Try/Catch/Finally as an Expression
|
|
|
|
test "return the result of try when no exception is thrown", ->
|
|
result = try
|
|
nonce
|
|
catch err
|
|
undefined
|
|
finally
|
|
undefined
|
|
eq nonce, result
|
|
|
|
test "single-line result of try when no exception is thrown", ->
|
|
result = try nonce catch err then undefined
|
|
eq nonce, result
|
|
|
|
test "return the result of catch when an exception is thrown", ->
|
|
fn = ->
|
|
try
|
|
throw ->
|
|
catch err
|
|
nonce
|
|
doesNotThrow fn
|
|
eq nonce, fn()
|
|
|
|
test "single-line result of catch when an exception is thrown", ->
|
|
fn = ->
|
|
try throw (->) catch err then nonce
|
|
doesNotThrow fn
|
|
eq nonce, fn()
|
|
|
|
test "optional catch", ->
|
|
fn = ->
|
|
try throw ->
|
|
nonce
|
|
doesNotThrow fn
|
|
eq nonce, fn()
|
|
|
|
|
|
#### Try/Catch/Finally Interaction With Other Constructs
|
|
|
|
test "try/catch with empty catch as last statement in a function body", ->
|
|
fn = ->
|
|
try nonce
|
|
catch err
|
|
eq nonce, fn()
|