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Make location and coordinate utmCoordinate() functions throwing. #16

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Make location and coordinate utmCoordinate() functions throwing. #16

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6 changes: 4 additions & 2 deletions UTMConversion/CLLocation+UTMCoordinate.swift
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Original file line number Diff line number Diff line change
Expand Up @@ -6,11 +6,13 @@ public extension CLLocation {
/**
Calculates the UTM coordinate of the receiver

- Parameter datum: The datum to use, defaults to WGS84 which should be fine for most applications
- Parameter datum: The datum to use, defaults to WGS84 which should be fine for most applications.

Throws a ``UTMConversionError.invalidCoordinate`` if the locations coordinate is invalid.
*/
func utmCoordinate(datum: UTMDatum = UTMDatum.wgs84) -> UTMCoordinate {
func utmCoordinate(datum: UTMDatum = UTMDatum.wgs84) throws -> UTMCoordinate {
let coordinate = self.coordinate
guard CLLocationCoordinate2DIsValid(coordinate) else { throw UTMConversionError.invalidCoordinate }
let zone = coordinate.zone
return TMCoordinate(coordinate: coordinate, centralMeridian: zone.centralMeridian, datum: datum).utmCoordinate(zone: zone, hemisphere: coordinate.hemisphere)
}
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6 changes: 4 additions & 2 deletions UTMConversion/CLLocationCoordinate2D+UTMCoordinate.swift
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Expand Up @@ -7,10 +7,12 @@ public extension CLLocationCoordinate2D {
/**
Calculates the UTM coordinate of the receiver

- Parameter datum: The datum to use, defaults to WGS84 which should be fine for most applications
- Parameter datum: The datum to use, defaults to WGS84 which should be fine for most applications.

Throws a ``UTMConversionError.invalidCoordinate`` if the coordinate is invalid.
*/
func utmCoordinate(datum: UTMDatum = UTMDatum.wgs84) -> UTMCoordinate {
func utmCoordinate(datum: UTMDatum = UTMDatum.wgs84) throws -> UTMCoordinate {
guard CLLocationCoordinate2DIsValid(self) else { throw UTMConversionError.invalidCoordinate }
let zone = self.zone
return TMCoordinate(coordinate: self, centralMeridian: zone.centralMeridian, datum: datum).utmCoordinate(zone: zone, hemisphere: hemisphere)
}
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3 changes: 3 additions & 0 deletions UTMConversion/UTMConversionError.swift
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@@ -0,0 +1,3 @@
public enum UTMConversionError: Error {
case invalidCoordinate
}
48 changes: 38 additions & 10 deletions UTMConversionTests/UTMConversionTests.swift
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Expand Up @@ -4,52 +4,52 @@ import XCTest

class UTMConversionTests: XCTestCase {

func testCLLocationCoordinate2D_utmCoordinate() {
let osloUTM = oslo.utmCoordinate()
func testCLLocationCoordinate2D_utmCoordinate() throws {
let osloUTM = try oslo.utmCoordinate()
XCTAssertEqual(osloUTM.northing, 6643010.0, accuracy: 0.00001);
XCTAssertEqual(osloUTM.easting, 598430.0, accuracy: 0.00001);
XCTAssertEqual(osloUTM.zone, 32)
XCTAssertEqual(osloUTM.hemisphere, .northern)

let trondheimUTM = trondheim.utmCoordinate()
let trondheimUTM = try trondheim.utmCoordinate()
XCTAssertEqual(trondheimUTM.northing, 7034313, accuracy: 0.00001)
XCTAssertEqual(trondheimUTM.easting, 569612, accuracy: 0.00001)
XCTAssertEqual(trondheimUTM.zone, 32)
XCTAssertEqual(trondheimUTM.hemisphere, .northern)

let johannesburgUTM = johannesburg.utmCoordinate()
let johannesburgUTM = try johannesburg.utmCoordinate()
XCTAssertEqual(johannesburgUTM.northing, 7100115, accuracy: 0.00001)
XCTAssertEqual(johannesburgUTM.easting, 603914, accuracy: 0.00001)
XCTAssertEqual(johannesburgUTM.zone, 35)
XCTAssertEqual(johannesburgUTM.hemisphere, .southern)

let buninyongUTM = buninyong.utmCoordinate()
let buninyongUTM = try buninyong.utmCoordinate()
XCTAssertEqual(buninyongUTM.northing, 5828674.33994, accuracy: 0.00001)
XCTAssertEqual(buninyongUTM.easting, 758173.79835, accuracy: 0.00001)
XCTAssertEqual(buninyongUTM.zone, 54)
XCTAssertEqual(buninyongUTM.hemisphere, .southern)
}

func testCLLocation_utmCoordinate() {
let osloUTM = osloLocation.utmCoordinate()
func testCLLocation_utmCoordinate() throws {
let osloUTM = try osloLocation.utmCoordinate()
XCTAssertEqual(osloUTM.northing, 6643010.0, accuracy: 0.00001);
XCTAssertEqual(osloUTM.easting, 598430.0, accuracy: 0.00001);
XCTAssertEqual(osloUTM.zone, 32)
XCTAssertEqual(osloUTM.hemisphere, .northern)

let trondheimUTM = trondheimLocation.utmCoordinate()
let trondheimUTM = try trondheimLocation.utmCoordinate()
XCTAssertEqual(trondheimUTM.northing, 7034313, accuracy: 0.00001)
XCTAssertEqual(trondheimUTM.easting, 569612, accuracy: 0.00001)
XCTAssertEqual(trondheimUTM.zone, 32)
XCTAssertEqual(trondheimUTM.hemisphere, .northern)

let johannesburgUTM = johannesburgLocation.utmCoordinate()
let johannesburgUTM = try johannesburgLocation.utmCoordinate()
XCTAssertEqual(johannesburgUTM.northing, 7100115, accuracy: 0.00001)
XCTAssertEqual(johannesburgUTM.easting, 603914, accuracy: 0.00001)
XCTAssertEqual(johannesburgUTM.zone, 35)
XCTAssertEqual(johannesburgUTM.hemisphere, .southern)

let buninyongUTM = buninyongLocation.utmCoordinate()
let buninyongUTM = try buninyongLocation.utmCoordinate()
XCTAssertEqual(buninyongUTM.northing, 5828674.33994, accuracy: 0.00001)
XCTAssertEqual(buninyongUTM.easting, 758173.79835, accuracy: 0.00001)
XCTAssertEqual(buninyongUTM.zone, 54)
Expand Down Expand Up @@ -98,6 +98,34 @@ class UTMConversionTests: XCTestCase {
XCTAssertEqual(oslo.coordinate.latitude, 59.912814611065265)
XCTAssertEqual(oslo.coordinate.longitude, 10.760192985178369)
}

func testInvalidCoordinateLatitude() {
let coordinate = CLLocationCoordinate2D(latitude: 90.1, longitude: -180)
XCTAssertThrowsError(try coordinate.utmCoordinate()) { error in
XCTAssertEqual(error as? UTMConversionError, UTMConversionError.invalidCoordinate)
}
}

func testInvalidCoordinateLongitude() {
let coordinate = CLLocationCoordinate2D(latitude: 90, longitude: -180.1)
XCTAssertThrowsError(try coordinate.utmCoordinate()) { error in
XCTAssertEqual(error as? UTMConversionError, UTMConversionError.invalidCoordinate)
}
}

func testInvalidLocationLatitude() {
let location = CLLocation(latitude: -90.1, longitude: 180)
XCTAssertThrowsError(try location.utmCoordinate()) { error in
XCTAssertEqual(error as? UTMConversionError, UTMConversionError.invalidCoordinate)
}
}

func testInvalidLocationLongitude() {
let location = CLLocation(latitude: -90, longitude: 180.1)
XCTAssertThrowsError(try location.utmCoordinate()) { error in
XCTAssertEqual(error as? UTMConversionError, UTMConversionError.invalidCoordinate)
}
}
}


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