Fixed another bug in comparator

Author: cmaglie

Diff for: version.go

@@ -288,7 +288,14 @@ func (v *Version) CompareTo(u *Version) int {
 		// Numeric identifiers always have lower precedence than non-numeric identifiers.
 		if vIsAlpha && uIsAlpha {
 			if cmp != 0 {
+				// alphanumeric vs alphanumeric, sorting has priority
 				return cmp
+			} else if vIsLonger {
+				// alphanumeric vs alphanumeric, v is longer, return >
+				return 1
+			} else if uIsLonger {
+				// alphanumeric vs alphanumeric, u is longer, return <
+				return -1
 			}
 			// Both alphanumeric, if comparison is equal, move on the next field
 		} else if vIsAlpha && !uIsAlpha {
@@ -297,15 +304,18 @@ func (v *Version) CompareTo(u *Version) int {
 		} else if !vIsAlpha && uIsAlpha {
 			// numeric vs alphanumeric, return <
 			return -1
-		} else if vIsLonger {
-			// numeric vs numeric, v is longer, return >
-			return 1
-		} else if uIsLonger {
-			// numeric vs numeric, u is longer, return <
-			return -1
-		} else if cmp != 0 {
-			// numeric vs numeric, return cmp if not equal
-			return cmp
+		} else {
+			if vIsLonger {
+				// numeric vs numeric, v is longer, return >
+				return 1
+			} else if uIsLonger {
+				// numeric vs numeric, u is longer, return <
+				return -1
+			} else if cmp != 0 {
+				// numeric vs numeric, return cmp if not equal
+				return cmp
+			}
+			// Both numeric, if comparison is equal, move on the next field
 		}
 
 		// A larger set of pre-release fields has a higher precedence than a smaller set,

Diff for: version_test.go

@@ -31,7 +31,7 @@ func ascending(t *testing.T, allowEqual bool, list ...string) {
 			require.False(t, a.GreaterThan(b))
 		} else {
 			fmt.Printf("%s %s %s\n", list[i], sign[comp], list[i+1])
-			require.Equal(t, comp, -1)
+			require.Equal(t, comp, -1, "cmp(%s, %s) must return '<', but returned '%s'", list[i], list[i+1], sign[comp])
 			require.True(t, a.LessThan(b))
 			require.True(t, a.LessThanOrEqual(b))
 			require.False(t, a.Equal(b))
@@ -42,7 +42,7 @@ func ascending(t *testing.T, allowEqual bool, list ...string) {
 		comp = b.CompareTo(a)
 		fmt.Printf("%s %s %s\n", b, sign[comp], a)
 		if allowEqual {
-			require.GreaterOrEqual(t, comp, 0)
+			require.GreaterOrEqual(t, comp, 0, "cmp(%s, %s) must return '>=', but returned '%s'", b, a, sign[comp])
 			require.False(t, b.LessThan(a))
 			require.True(t, b.GreaterThanOrEqual(a))
 		} else {
@@ -102,6 +102,16 @@ func TestVersionComparator(t *testing.T) {
 		"1.20.0",
 		"2.1.1",
 		"10.0.0",
+		"17.3.0-atmel3.6.1-arduino7",
+		"17.3.0-atmel3.6.1-arduino7not",
+		"17.3.0-atmel3.6.1-beduino8",
+		"17.3.0-atmel3.6.1-beduino8not",
+		"17.3.0-atmel3a.6.1-arduino7",
+		"17.3.0-atmel3a.16.2.arduino7",
+		"17.3.0-atmel3a.16.12.arduino7",
+		"17.3.0-atmel3a.16.1-arduino7",
+		"17.3.0-atmel3a.16.12-arduino7",
+		"17.3.0-atmel3a.16.2-arduino7",
 	)
 	equal(
 		MustParse(""),