Fix division by zero when calculating counter percentage

mattt · mattt · commit e25778b70e45 · 2020-01-28T08:51:40.000-08:00
diff --git a/Sources/swift-dcov/Supporting Types/Counter.swift b/Sources/swift-dcov/Supporting Types/Counter.swift
@@ -5,7 +5,8 @@ struct Counter {
     var total: Int { hits + misses }
 
     var percentage: Double {
-        Double(hits) / Double(total) * 100.0
+        guard total > 0 else { return 0 }
+        return Double(hits) / Double(total) * 100.0
     }
 
     init(hits: Int = 0, misses: Int = 0) {

Original file line number	Diff line number	Diff line change
`@@ -5,7 +5,8 @@ struct Counter {`
`5`	`5`	`var total: Int { hits + misses }`
`6`	`6`
`7`	`7`	`var percentage: Double {`
`8`		`- Double(hits) / Double(total) * 100.0`
	`8`	`+ guard total > 0 else { return 0 }`
	`9`	`+ return Double(hits) / Double(total) * 100.0`
`9`	`10`	`}`
`10`	`11`
`11`	`12`	`init(hits: Int = 0, misses: Int = 0) {`