CommandLineToolkit

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import Foundation
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import JSONStream
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import XCTest
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class JSONReaderNumberEdgeCaseTests: XCTestCase {
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    let eventStream = FakeEventStream()
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    func testNumberJustMinusShouldFail() throws {
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        let jsonStream = FakeJSONStream(string: "[-]")
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        let reader = JSONReader(inputStream: jsonStream, eventStream: eventStream)
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        XCTAssertThrowsError(try reader.start())
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    }
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    func testNegativeNumberWithoutIntPartShouldFail() throws {
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        let jsonStream = FakeJSONStream(string: "[-.123]")
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        let reader = JSONReader(inputStream: jsonStream, eventStream: eventStream)
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        XCTAssertThrowsError(try reader.start())
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    }
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    func testNegativeNumberWithoutFractionalPartShouldFail() throws {
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        let jsonStream = FakeJSONStream(string: "[-2.]")
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        let reader = JSONReader(inputStream: jsonStream, eventStream: eventStream)
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        XCTAssertThrowsError(try reader.start())
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    }
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    func testNumberWithLeadingZeroFails() throws {
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        let jsonStream = FakeJSONStream(string: "[01]")
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        let reader = JSONReader(inputStream: jsonStream, eventStream: eventStream)
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        XCTAssertThrowsError(try reader.start())
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    }
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    func testNegativeNumberWithLeadingZeroFails() throws {
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        let jsonStream = FakeJSONStream(string: "[-01]")
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        let reader = JSONReader(inputStream: jsonStream, eventStream: eventStream)
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        XCTAssertThrowsError(try reader.start())
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    }
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    func testNumberWithoutFractionalPartWithExponentialPartFails() throws {
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        let jsonStream = FakeJSONStream(string: "[0.e1]")
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        let reader = JSONReader(inputStream: jsonStream, eventStream: eventStream)
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        XCTAssertThrowsError(try reader.start())
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    }
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    func testNumberWithIntFractionalPositiveExponentialPartsSucceedes() throws {
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        let jsonStream = FakeJSONStream(string: "[0.1e+1]")
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        let reader = JSONReader(inputStream: jsonStream, eventStream: eventStream)
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        try reader.start()
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        XCTAssertEqual(eventStream.allArrays[0], [1])
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    }
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    func testNegativeNumberWithIntFractionalNegativeExponentialPartsSucceedes() throws {
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        let jsonStream = FakeJSONStream(string: "[-0.1e-1]")
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        let reader = JSONReader(inputStream: jsonStream, eventStream: eventStream)
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        try reader.start()
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        XCTAssertEqual(eventStream.allArrays[0], [-0.01])
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    }
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    func testNegativeNumberWithWrongMinusMinusxponentialPartFails() throws {
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        try XCTSkipIf(shouldSkipDueToNumberFormatDifferences())
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        let jsonStream = FakeJSONStream(string: "[-0.1e--1]")
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        let reader = JSONReader(inputStream: jsonStream, eventStream: eventStream)
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        XCTAssertThrowsError(try reader.start())
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    }
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    func testNegativeNumberWithWrongPlusPlusExponentialPartFails() throws {
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        try XCTSkipIf(shouldSkipDueToNumberFormatDifferences())
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        let jsonStream = FakeJSONStream(string: "[-0.1e++1]")
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        let reader = JSONReader(inputStream: jsonStream, eventStream: eventStream)
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        XCTAssertThrowsError(try reader.start())
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    }
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    func testNegativeNumberWithWrongPlusMinusExponentialPartFails() throws {
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        try XCTSkipIf(shouldSkipDueToNumberFormatDifferences())
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        let jsonStream = FakeJSONStream(string: "[0.1e+-1]")
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        let reader = JSONReader(inputStream: jsonStream, eventStream: eventStream)
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        XCTAssertThrowsError(try reader.start())
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    }
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    func testNumberWithEmptyExponentialPartFails() throws {
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        let jsonStream = FakeJSONStream(string: "[0.3e]")
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        let reader = JSONReader(inputStream: jsonStream, eventStream: eventStream)
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        XCTAssertThrowsError(try reader.start())
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    }
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    func testNumberWithEmptyExponentialPlusPartFails() throws {
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        try XCTSkipIf(shouldSkipDueToNumberFormatDifferences())
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        let jsonStream = FakeJSONStream(string: "[0.3e+]")
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        let reader = JSONReader(inputStream: jsonStream, eventStream: eventStream)
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        XCTAssertThrowsError(try reader.start())
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    }
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    func testPlusNumberFails() throws {
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        let jsonStream = FakeJSONStream(string: "[+1]")
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        let reader = JSONReader(inputStream: jsonStream, eventStream: eventStream)
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        XCTAssertThrowsError(try reader.start())
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    }
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    private func shouldSkipDueToNumberFormatDifferences() -> Bool {
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        // https://github.com/apple/swift-corelibs-foundation/issues/4680
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#if os(macOS)
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        return false
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#elseif os(Linux)
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        return true
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#else
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        #error("Unsupported OS")
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#endif
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    }
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}
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