coverage

.github/actions/test-summary/make-summary.swift

@@ -39,6 +39,14 @@ for node in failures {
     print(messages.joined(separator: ". "))
 }
 
+if let coverage {
+	let table = try makeTable(
+	   name: coverage.lastPathComponent, 
+	   coverage: JSONDecoder().decode(Coverage.self, from: Data(contentsOf: coverage))
+	)
+	print(table)	
+}
+
 func makeTable(
 	total: Int,
 	failed: Int,
@@ -51,4 +59,52 @@ func makeTable(
 	<tr><td>\(junit.lastPathComponent)</td><td>\(total) ran</td><td>\(passed) passed</td><td>\(skipped) skipped</td><td>\(failed) failed</td></tr>
 	</table>
 	"""
-}
+}
+
+func makeTable(
+	name: String,
+	coverage: Coverage
+) -> String {
+	"""
+	<table>
+	<tr><td></td><td><b>Covered</b></td><td><b>Total</b></td><td><b>Coverage</b> ⏭️</td></tr>
+	<tr><td>\(name)</td><td>\(coverage.covered)</td><td>\(coverage.count)</td><td>\(coverage.percentString)</td></tr>
+	</table>
+	"""
+}
+
+struct Coverage: Decodable {
+	var count: Int
+	var covered: Int
+	var percent: Double
+
+	init(from decoder: any Decoder) throws {
+        var unkeyed = try decoder
+		   .container(keyedBy: CodingKeys.self)
+		   .nestedUnkeyedContainer(forKey: .data)
+        let container = try unkeyed
+		   .nestedContainer(keyedBy: CodingKeys.self)
+		   .nestedContainer(keyedBy: CodingKeys.self, forKey: .totals)
+           .nestedContainer(keyedBy: CodingKeys.self, forKey: .lines)
+
+        self.count = try container.decode(Int.self, forKey: .count)
+        self.covered = try container.decode(Int.self, forKey: .covered)
+        self.percent = try container.decode(Double.self, forKey: .percent)
+    }
+
+    enum CodingKeys: String, CodingKey {
+        case data
+        case totals
+		case lines
+        case count
+        case covered
+        case percent
+    }
+
+	var percentString: String {
+		let formatter = NumberFormatter()
+		formatter.numberStyle = .percent
+		formatter.maximumFractionDigits = 2
+		return formatter.string(from: (percent / 100) as NSNumber) ?? "asdf"
+	}
+}