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tsolomkotsolomko
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Add tests for min/maxRepresentableNumber functions
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‎BitByteData.xcodeproj/project.pbxproj‎

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06FA0DC421935115009B4DEB /* LsbBitWriterBenchmarks.swift in Sources */ = {isa = PBXBuildFile; fileRef = 06A81B0E2177947600B6B7BB /* LsbBitWriterBenchmarks.swift */; };
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06FA0DC521935115009B4DEB /* MsbBitWriterBenchmarks.swift in Sources */ = {isa = PBXBuildFile; fileRef = 06A81B102177955500B6B7BB /* MsbBitWriterBenchmarks.swift */; };
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E608AB16253740C60036626D /* TestHelper.swift in Sources */ = {isa = PBXBuildFile; fileRef = E608AB15253740C60036626D /* TestHelper.swift */; };
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E6425642267FA97E002D75D8 /* SignedNumberRepresentationTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = E6425641267FA97E002D75D8 /* SignedNumberRepresentationTests.swift */; };
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/* End PBXBuildFile section */
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/* Begin PBXContainerItemProxy section */
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06F0656C1FFAEA4B00312A82 /* BitByteData.framework */ = {isa = PBXFileReference; explicitFileType = wrapper.framework; includeInIndex = 0; path = BitByteData.framework; sourceTree = BUILT_PRODUCTS_DIR; };
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06F065811FFAEAA000312A82 /* TestBitByteData.xctest */ = {isa = PBXFileReference; explicitFileType = wrapper.cfbundle; includeInIndex = 0; path = TestBitByteData.xctest; sourceTree = BUILT_PRODUCTS_DIR; };
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E608AB15253740C60036626D /* TestHelper.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = TestHelper.swift; sourceTree = "<group>"; };
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E6425641267FA97E002D75D8 /* SignedNumberRepresentationTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = SignedNumberRepresentationTests.swift; sourceTree = "<group>"; };
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/* End PBXFileReference section */
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/* Begin PBXFrameworksBuildPhase section */
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06F065641FFAEA1F00312A82 /* LsbBitWriterTests.swift */,
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06F065621FFAEA1F00312A82 /* MsbBitWriterTests.swift */,
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E608AB15253740C60036626D /* TestHelper.swift */,
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E6425641267FA97E002D75D8 /* SignedNumberRepresentationTests.swift */,
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);
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path = BitByteDataTests;
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sourceTree = "<group>";
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buildActionMask = 2147483647;
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files = (
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06F0658F1FFAEAA900312A82 /* LsbBitReaderTests.swift in Sources */,
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E6425642267FA97E002D75D8 /* SignedNumberRepresentationTests.swift in Sources */,
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06F065901FFAEAA900312A82 /* LittleEndianByteReaderTests.swift in Sources */,
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E608AB16253740C60036626D /* TestHelper.swift in Sources */,
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06F0658C1FFAEAA900312A82 /* MsbBitWriterTests.swift in Sources */,

‎Tests/BitByteDataTests/SignedNumberRepresentationTests.swift‎

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// Copyright (c) 2021 Timofey Solomko
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// Licensed under MIT License
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//
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// See LICENSE for license information
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import XCTest
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import BitByteData
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class SignedNumberRepresentationTests: XCTestCase {
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// MARK: minRepresentableNumber
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func testMinRepresentableNumber_SM() {
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let repr = SignedNumberRepresentation.signMagnitude
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XCTAssertEqual(repr.minRepresentableNumber(bitsCount: 1), 0)
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XCTAssertEqual(repr.minRepresentableNumber(bitsCount: 2), -1)
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XCTAssertEqual(repr.minRepresentableNumber(bitsCount: 11), -1023)
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XCTAssertEqual(repr.minRepresentableNumber(bitsCount: 15), -16383)
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XCTAssertEqual(repr.minRepresentableNumber(bitsCount: 23), -4194303)
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XCTAssertEqual(repr.minRepresentableNumber(bitsCount: Int.bitWidth), Int.min)
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}
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func testMinRepresentableNumber_1C() {
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let repr = SignedNumberRepresentation.oneComplementNegatives
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XCTAssertEqual(repr.minRepresentableNumber(bitsCount: 1), 0)
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XCTAssertEqual(repr.minRepresentableNumber(bitsCount: 2), -1)
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XCTAssertEqual(repr.minRepresentableNumber(bitsCount: 11), -1023)
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XCTAssertEqual(repr.minRepresentableNumber(bitsCount: 15), -16383)
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XCTAssertEqual(repr.minRepresentableNumber(bitsCount: 23), -4194303)
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XCTAssertEqual(repr.minRepresentableNumber(bitsCount: Int.bitWidth), Int.min)
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}
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func testMinRepresentableNumber_2C() {
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let repr = SignedNumberRepresentation.twoComplementNegatives
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XCTAssertEqual(repr.minRepresentableNumber(bitsCount: 1), -1)
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XCTAssertEqual(repr.minRepresentableNumber(bitsCount: 2), -2)
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XCTAssertEqual(repr.minRepresentableNumber(bitsCount: 11), -1024)
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XCTAssertEqual(repr.minRepresentableNumber(bitsCount: 15), -16384)
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XCTAssertEqual(repr.minRepresentableNumber(bitsCount: 23), -4194304)
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XCTAssertEqual(repr.minRepresentableNumber(bitsCount: Int.bitWidth), Int.min)
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}
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func testMinRepresentableNumber_Biased_E3() {
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let repr = SignedNumberRepresentation.biased(bias: 3)
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XCTAssertEqual(repr.minRepresentableNumber(bitsCount: 1), -3)
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XCTAssertEqual(repr.minRepresentableNumber(bitsCount: 2), -3)
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XCTAssertEqual(repr.minRepresentableNumber(bitsCount: 11), -3)
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XCTAssertEqual(repr.minRepresentableNumber(bitsCount: 15), -3)
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XCTAssertEqual(repr.minRepresentableNumber(bitsCount: 23), -3)
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XCTAssertEqual(repr.minRepresentableNumber(bitsCount: Int.bitWidth), -3)
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}
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func testMinRepresentableNumber_Biased_E127() {
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let repr = SignedNumberRepresentation.biased(bias: 127)
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XCTAssertEqual(repr.minRepresentableNumber(bitsCount: 1), -127)
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XCTAssertEqual(repr.minRepresentableNumber(bitsCount: 2), -127)
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XCTAssertEqual(repr.minRepresentableNumber(bitsCount: 11), -127)
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XCTAssertEqual(repr.minRepresentableNumber(bitsCount: 15), -127)
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XCTAssertEqual(repr.minRepresentableNumber(bitsCount: 23), -127)
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XCTAssertEqual(repr.minRepresentableNumber(bitsCount: Int.bitWidth), -127)
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}
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func testMinRepresentableNumber_Biased_E1023() {
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let repr = SignedNumberRepresentation.biased(bias: 1023)
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XCTAssertEqual(repr.minRepresentableNumber(bitsCount: 1), -1023)
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XCTAssertEqual(repr.minRepresentableNumber(bitsCount: 2), -1023)
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XCTAssertEqual(repr.minRepresentableNumber(bitsCount: 11), -1023)
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XCTAssertEqual(repr.minRepresentableNumber(bitsCount: 15), -1023)
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XCTAssertEqual(repr.minRepresentableNumber(bitsCount: 23), -1023)
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XCTAssertEqual(repr.minRepresentableNumber(bitsCount: Int.bitWidth), -1023)
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}
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func testMinRepresentableNumber_RN2() {
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let repr = SignedNumberRepresentation.radixNegativeTwo
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XCTAssertEqual(repr.minRepresentableNumber(bitsCount: 1), 0)
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XCTAssertEqual(repr.minRepresentableNumber(bitsCount: 2), -2)
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XCTAssertEqual(repr.minRepresentableNumber(bitsCount: 11), -682)
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XCTAssertEqual(repr.minRepresentableNumber(bitsCount: 15), -10922)
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XCTAssertEqual(repr.minRepresentableNumber(bitsCount: 23), -2796202)
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XCTAssertEqual(repr.minRepresentableNumber(bitsCount: Int.bitWidth), Int.min)
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}
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// MARK: maxRepresentableNumber
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func testMaxRepresentableNumber_SM() {
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let repr = SignedNumberRepresentation.signMagnitude
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XCTAssertEqual(repr.maxRepresentableNumber(bitsCount: 1), 0)
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XCTAssertEqual(repr.maxRepresentableNumber(bitsCount: 2), 1)
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XCTAssertEqual(repr.maxRepresentableNumber(bitsCount: 11), 1023)
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XCTAssertEqual(repr.maxRepresentableNumber(bitsCount: 15), 16383)
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XCTAssertEqual(repr.maxRepresentableNumber(bitsCount: 23), 4194303)
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XCTAssertEqual(repr.maxRepresentableNumber(bitsCount: Int.bitWidth), Int.max)
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}
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func testMaxRepresentableNumber_1C() {
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let repr = SignedNumberRepresentation.oneComplementNegatives
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XCTAssertEqual(repr.maxRepresentableNumber(bitsCount: 1), 0)
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XCTAssertEqual(repr.maxRepresentableNumber(bitsCount: 2), 1)
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XCTAssertEqual(repr.maxRepresentableNumber(bitsCount: 11), 1023)
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XCTAssertEqual(repr.maxRepresentableNumber(bitsCount: 15), 16383)
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XCTAssertEqual(repr.maxRepresentableNumber(bitsCount: 23), 4194303)
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XCTAssertEqual(repr.maxRepresentableNumber(bitsCount: Int.bitWidth), Int.max)
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}
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func testMaxRepresentableNumber_2C() {
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let repr = SignedNumberRepresentation.twoComplementNegatives
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XCTAssertEqual(repr.maxRepresentableNumber(bitsCount: 1), 0)
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XCTAssertEqual(repr.maxRepresentableNumber(bitsCount: 2), 1)
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XCTAssertEqual(repr.maxRepresentableNumber(bitsCount: 11), 1023)
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XCTAssertEqual(repr.maxRepresentableNumber(bitsCount: 15), 16383)
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XCTAssertEqual(repr.maxRepresentableNumber(bitsCount: 23), 4194303)
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XCTAssertEqual(repr.maxRepresentableNumber(bitsCount: Int.bitWidth), Int.max)
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}
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func testMaxRepresentableNumber_Biased_E3() {
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let repr = SignedNumberRepresentation.biased(bias: 3)
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XCTAssertEqual(repr.maxRepresentableNumber(bitsCount: 1), -2)
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XCTAssertEqual(repr.maxRepresentableNumber(bitsCount: 2), 0)
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XCTAssertEqual(repr.maxRepresentableNumber(bitsCount: 11), 2044)
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XCTAssertEqual(repr.maxRepresentableNumber(bitsCount: 15), 32764)
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XCTAssertEqual(repr.maxRepresentableNumber(bitsCount: 23), 8388604)
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XCTAssertEqual(repr.maxRepresentableNumber(bitsCount: Int.bitWidth), Int.max - 3)
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}
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func testMaxRepresentableNumber_Biased_E127() {
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let repr = SignedNumberRepresentation.biased(bias: 127)
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XCTAssertEqual(repr.maxRepresentableNumber(bitsCount: 1), -126)
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XCTAssertEqual(repr.maxRepresentableNumber(bitsCount: 2), -124)
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XCTAssertEqual(repr.maxRepresentableNumber(bitsCount: 11), 1920)
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XCTAssertEqual(repr.maxRepresentableNumber(bitsCount: 15), 32640)
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XCTAssertEqual(repr.maxRepresentableNumber(bitsCount: 23), 8388480)
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XCTAssertEqual(repr.maxRepresentableNumber(bitsCount: Int.bitWidth), Int.max - 127)
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}
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func testMaxRepresentableNumber_Biased_E1023() {
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let repr = SignedNumberRepresentation.biased(bias: 1023)
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XCTAssertEqual(repr.maxRepresentableNumber(bitsCount: 1), -1022)
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XCTAssertEqual(repr.maxRepresentableNumber(bitsCount: 2), -1020)
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XCTAssertEqual(repr.maxRepresentableNumber(bitsCount: 11), 1024)
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XCTAssertEqual(repr.maxRepresentableNumber(bitsCount: 15), 31744)
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XCTAssertEqual(repr.maxRepresentableNumber(bitsCount: 23), 8387584)
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XCTAssertEqual(repr.maxRepresentableNumber(bitsCount: Int.bitWidth), Int.max - 1023)
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}
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func testMaxRepresentableNumber_RN2() {
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let repr = SignedNumberRepresentation.radixNegativeTwo
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XCTAssertEqual(repr.maxRepresentableNumber(bitsCount: 1), 1)
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XCTAssertEqual(repr.maxRepresentableNumber(bitsCount: 2), 1)
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XCTAssertEqual(repr.maxRepresentableNumber(bitsCount: 11), 1365)
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XCTAssertEqual(repr.maxRepresentableNumber(bitsCount: 15), 21845)
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XCTAssertEqual(repr.maxRepresentableNumber(bitsCount: 23), 5592405)
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XCTAssertEqual(repr.maxRepresentableNumber(bitsCount: Int.bitWidth), 6148914691236517205)
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}
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}

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