Create unit test for color JSON

Tests/MakeColorsTests/AssetCatalogFormattingTest.swift

@@ -0,0 +1,26 @@
+@testable import LibMakeColors
+import RBBJSON
+import XCTest
+
+class AssetCatalogFormattingTest: XCTestCase {
+    func testColorProducedValidJSON() throws {
+        let color = Color(red: 0xFF, green: 0xF0, blue: 0x0F)
+        let data = Data(color.json().utf8)
+
+        let json = try JSONDecoder().decode(RBBJSON.self, from: data)
+
+        XCTAssertEqual(json.info.author, .string("de.5sw.MakeColors"))
+        XCTAssertEqual(json.info.version, .number(1))
+
+        XCTAssertEqual(Array(json.colors[any: .child]).count, 1)
+
+        XCTAssertEqual(json.colors[0].idiom, .string("universal"))
+
+        let jsonColor = json.colors[0].color
+        XCTAssertEqual(jsonColor["color-space"], .string("srgb"))
+        XCTAssertEqual(jsonColor.components.alpha, .string("1.0"))
+        XCTAssertEqual(jsonColor.components.red, .string("0xFF"))
+        XCTAssertEqual(jsonColor.components.green, .string("0xF0"))
+        XCTAssertEqual(jsonColor.components.blue, .string("0x0F"))
+    }
+}