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Jul 16, 2019
Merged

Add nested choice tests #18

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250 changes: 250 additions & 0 deletions Tests/XMLCoderTests/NestedChoiceTests.swift
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//
// NestedChoiceTests.swift
// XMLCoderTests
//
// Created by James Bean on 7/15/19.
//

import XCTest
import XMLCoder

private struct Container: Equatable {
let paragraphs: [Paragraph]
}

private struct Paragraph: Equatable {
let entries: [Entry]
}

private enum Entry: Equatable {
case run(Run)
case properties(Properties)
case br(Break)
}

private struct Run: Codable, Equatable {
let id: Int
let text: String
}

private struct Properties: Codable, Equatable {
let id: Int
let title: String
}

private struct Break: Codable, Equatable { }

extension Container: Codable {
enum CodingKeys: String, CodingKey {
case paragraphs = "p"
}
}

extension Paragraph: Codable {
init(from decoder: Decoder) throws {
let container = try decoder.singleValueContainer()
self.entries = try container.decode([Entry].self)
}

func encode(to encoder: Encoder) throws {
var container = encoder.singleValueContainer()
try container.encode(entries)
}
}

extension Entry: XMLChoiceCodable {
private enum CodingKeys: String, CodingKey {
case run, properties, br
}
public init(from decoder: Decoder) throws {
let container = try decoder.container(keyedBy: CodingKeys.self)
do {
self = .run(try container.decode(Run.self, forKey: .run))
} catch DecodingError.keyNotFound {
do {
self = .properties(try container.decode(Properties.self, forKey: .properties))
} catch DecodingError.keyNotFound {
self = .br(try container.decode(Break.self, forKey: .br))
}
}
}

func encode(to encoder: Encoder) throws {
var container = encoder.container(keyedBy: CodingKeys.self)
switch self {
case let .run(value):
try container.encode(value, forKey: .run)
case let .properties(value):
try container.encode(value, forKey: .properties)
case let .br(value):
try container.encode(value, forKey: .br)
}
}
}

class NestedChoiceTests: XCTestCase {

func testBreakDecoding() throws {
let xml = "<br></br>"
let result = try XMLDecoder().decode(Break.self, from: xml.data(using: .utf8)!)
let expected = Break()
XCTAssertEqual(result, expected)
}

func testPropertiesDecoding() throws {
let xml = """
<properties>
<id>431</id>
<title>A Word About Wake Times</title>
</properties>
"""
let result = try XMLDecoder().decode(Properties.self, from: xml.data(using: .utf8)!)
let expected = Properties(id: 431, title: "A Word About Wake Times")
XCTAssertEqual(result, expected)
}

func testPropertiesAsEntryDecoding() throws {
let xml = """
<entry>
<properties>
<id>431</id>
<title>A Word About Wake Times</title>
</properties>
</entry>
"""
let result = try XMLDecoder().decode(Entry.self, from: xml.data(using: .utf8)!)
let expected: Entry = .properties(Properties(id: 431, title: "A Word About Wake Times"))
XCTAssertEqual(result, expected)
}

func testRunDecoding() throws {
let xml = """
<run>
<id>1518</id>
<text>I am answering it again.</text>
</run>
"""
let result = try XMLDecoder().decode(Run.self, from: xml.data(using: .utf8)!)
let expected = Run(id: 1518, text: "I am answering it again.")
XCTAssertEqual(result, expected)
}

func testRunAsEntryDecoding() throws {
let xml = """
<entry>
<run>
<id>1518</id>
<text>I am answering it again.</text>
</run>
</entry>
"""
let result = try XMLDecoder().decode(Entry.self, from: xml.data(using: .utf8)!)
let expected = Entry.run(Run(id: 1518, text: "I am answering it again."))
XCTAssertEqual(result, expected)
}

func testEntriesDecoding() throws {
let xml = """
<entries>
<run>
<id>1518</id>
<text>I am answering it again.</text>
</run>
<properties>
<id>431</id>
<title>A Word About Wake Times</title>
</properties>
</entries>
"""
let result = try XMLDecoder().decode([Entry].self, from: xml.data(using: .utf8)!)
let expected: [Entry] = [
.run(Run(id: 1518, text: "I am answering it again.")),
.properties(Properties(id: 431, title: "A Word About Wake Times"))
]
XCTAssertEqual(result, expected)
}

func testParagraphDecoding() throws {
let xml = """
<p>
<run>
<id>1518</id>
<text>I am answering it again.</text>
</run>
<properties>
<id>431</id>
<title>A Word About Wake Times</title>
</properties>
</p>
"""
let result = try XMLDecoder().decode(Paragraph.self, from: xml.data(using: .utf8)!)
let expected = Paragraph(
entries: [
.run(Run(id: 1518, text: "I am answering it again.")),
.properties(Properties(id: 431, title: "A Word About Wake Times"))
]
)
XCTAssertEqual(result, expected)
}

func testNestedEnums() throws {
let xml = """
<container>
<p>
<run>
<id>1518</id>
<text>I am answering it again.</text>
</run>
<properties>
<id>431</id>
<title>A Word About Wake Times</title>
</properties>
</p>
<p>
<run>
<id>1519</id>
<text>I am answering it again.</text>
</run>
</p>
</container>
"""
let result = try XMLDecoder().decode(Container.self, from: xml.data(using: .utf8)!)
let expected = Container(
paragraphs: [
Paragraph(
entries: [
.run(Run(id: 1518, text: "I am answering it again.")),
.properties(Properties(id: 431, title: "A Word About Wake Times")),
]
),
Paragraph(
entries: [
.run(Run(id: 1519, text: "I am answering it again.")),
]
)
]
)
XCTAssertEqual(result, expected)
}

func testNestedEnumsRoundTrip() throws {
let original = Container(
paragraphs: [
Paragraph(
entries: [
.run(Run(id: 1518, text: "I am answering it again.")),
.properties(Properties(id: 431, title: "A Word About Wake Times")),
]
),
Paragraph(
entries: [
.run(Run(id: 1519, text: "I am answering it again.")),
]
)
]
)
let encoded = try XMLEncoder().encode(original, withRootKey: "container")
let decoded = try XMLDecoder().decode(Container.self, from: encoded)
XCTAssertEqual(decoded, original)
}
}
4 changes: 4 additions & 0 deletions XMLCoder.xcodeproj/project.pbxproj
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Expand Up @@ -27,6 +27,7 @@
1482D5A222DD2D9400AE2D6E /* SimpleChoiceTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = 1482D5A122DD2D9400AE2D6E /* SimpleChoiceTests.swift */; };
1482D5A422DD2F4D00AE2D6E /* CompositeChoiceTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = 1482D5A322DD2F4D00AE2D6E /* CompositeChoiceTests.swift */; };
1482D5A822DD6AEE00AE2D6E /* SingleElementBox.swift in Sources */ = {isa = PBXBuildFile; fileRef = 1482D5A722DD6AED00AE2D6E /* SingleElementBox.swift */; };
1482D5AA22DD961E00AE2D6E /* NestedChoiceTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = 1482D5A922DD961E00AE2D6E /* NestedChoiceTests.swift */; };
A61DCCD821DF9CA200C0A19D /* ClassTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = A61DCCD621DF8DB300C0A19D /* ClassTests.swift */; };
A61FE03921E4D60B0015D993 /* UnkeyedIntTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = A61FE03721E4D4F10015D993 /* UnkeyedIntTests.swift */; };
A61FE03C21E4EAB10015D993 /* KeyedIntTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = A61FE03A21E4EA8B0015D993 /* KeyedIntTests.swift */; };
Expand Down Expand Up @@ -155,6 +156,7 @@
1482D5A122DD2D9400AE2D6E /* SimpleChoiceTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = SimpleChoiceTests.swift; sourceTree = "<group>"; };
1482D5A322DD2F4D00AE2D6E /* CompositeChoiceTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = CompositeChoiceTests.swift; sourceTree = "<group>"; };
1482D5A722DD6AED00AE2D6E /* SingleElementBox.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = SingleElementBox.swift; sourceTree = "<group>"; };
1482D5A922DD961E00AE2D6E /* NestedChoiceTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = NestedChoiceTests.swift; sourceTree = "<group>"; };
A61DCCD621DF8DB300C0A19D /* ClassTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ClassTests.swift; sourceTree = "<group>"; };
A61FE03721E4D4F10015D993 /* UnkeyedIntTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = UnkeyedIntTests.swift; sourceTree = "<group>"; };
A61FE03A21E4EA8B0015D993 /* KeyedIntTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = KeyedIntTests.swift; sourceTree = "<group>"; };
Expand Down Expand Up @@ -414,6 +416,7 @@
BF63EF1D21CEC99A001D38C5 /* BenchmarkTests.swift */,
1482D5A122DD2D9400AE2D6E /* SimpleChoiceTests.swift */,
1482D5A322DD2F4D00AE2D6E /* CompositeChoiceTests.swift */,
1482D5A922DD961E00AE2D6E /* NestedChoiceTests.swift */,
OBJ_28 /* BooksTest.swift */,
D1B6A2C02297EF5A005B8A6E /* BorderTest.swift */,
OBJ_29 /* BreakfastTest.swift */,
Expand Down Expand Up @@ -724,6 +727,7 @@
BF63EF0821CD7AF8001D38C5 /* URLBoxTests.swift in Sources */,
BF9457DD21CBB62C005ACFDE /* DateBoxTests.swift in Sources */,
A61DCCD821DF9CA200C0A19D /* ClassTests.swift in Sources */,
1482D5AA22DD961E00AE2D6E /* NestedChoiceTests.swift in Sources */,
BF9457CD21CBB516005ACFDE /* FloatBoxTests.swift in Sources */,
BF9457F621CBB6BC005ACFDE /* KeyedTests.swift in Sources */,
BF9457C821CBB516005ACFDE /* BoolBoxTests.swift in Sources */,
Expand Down