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Add JSError with tests, add JSObject.description #47

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merged 2 commits into from
Sep 14, 2020
Merged

Add JSError with tests, add JSObject.description #47

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2a7354b
Add JSError with tests, add JSObject.description
MaxDesiatov Sep 13, 2020
e716309
Add newlines at end of files
MaxDesiatov Sep 13, 2020
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8 changes: 8 additions & 0 deletions IntegrationTests/TestSuites/Sources/PrimaryTests/main.swift
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Original file line number Diff line number Diff line change
Expand Up @@ -394,3 +394,11 @@ try test("TypedArray_Mutation") {
}
try expectEqual(toString(array.jsValue().object!), jsStringify(Array(0..<100)))
}

try test("Error") {
let message = "test error"
let error = JSError(message: message)
try expectEqual(error.name, "Error")
try expectEqual(error.message, message)
try expectEqual(error.description, "Error: test error")
}
20 changes: 20 additions & 0 deletions Sources/JavaScriptKit/BasicObjects/JSError.swift
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@@ -0,0 +1,20 @@
public final class JSError {
private let ref: JSObject
private static let constructor = JSObject.global.Error.function!

public init(message: String) {
ref = Self.constructor.new([message])
}

public var message: String {
ref.message.string!
}

public var name: String {
ref.name.string!
}
}
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Although it’s not standard, all engines that I know of implement error.stack to provide a stack trace as a string. It might be useful to access it.


extension JSError: CustomStringConvertible {
public var description: String { ref.description }
}
3 changes: 3 additions & 0 deletions Sources/JavaScriptKit/FundamentalObjects/JSObject.swift
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Expand Up @@ -48,3 +48,6 @@ public class JSObject: Equatable {
}
}

extension JSObject: CustomStringConvertible {
public var description: String { self.toString!().string! }
}