Fix comment and assert score in test case

scheduler/spread.go

@@ -215,7 +215,8 @@ func evenSpreadScoreBoost(pset *propertySet, option *structs.Node) float64 {
 		// Maximum possible penalty when the distribution is even
 		return -1.0
 	} else if minCount == 0 {
-		// Maximum possible boost
+		// Current attribute count is equal to min and both are zero. This means no allocations
+		// were placed for this attribute value yet. Should get the maximum possible boost.
 		return 1.0
 	}
 

scheduler/spread_test.go

@@ -566,4 +566,5 @@ func Test_evenSpreadScoreBoost(t *testing.T) {
 	}
 	boost := evenSpreadScoreBoost(pset, opt)
 	require.False(t, math.IsInf(boost, 1))
+	require.Equal(t, 1.0, boost)
 }