Change findTest to return the most recently added test

Whenever we encounter a result line in the test output, we would find
the first test with the matching name and update it. However, in some
cases it's possible for the same test name to appear multiple times in
the output. To prevent us from always updating the oldest test, the
order in which findTests searches for a matching test is reversed so
that it always returns the most recently added test.

Fixes #54.

go-junit-report_test.go

@@ -610,6 +610,38 @@ var testCases = []TestCase{
 			},
 		},
 	},
+	{
+		name:       "16-repeated-names.txt",
+		reportName: "16-report.xml",
+		report: &parser.Report{
+			Packages: []parser.Package{
+				{
+					Name: "package/repeated-names",
+					Time: 1,
+					Tests: []*parser.Test{
+						{
+							Name:   "TestRepeat",
+							Time:   0,
+							Result: parser.PASS,
+							Output: []string{},
+						},
+						{
+							Name:   "TestRepeat",
+							Time:   0,
+							Result: parser.PASS,
+							Output: []string{},
+						},
+						{
+							Name:   "TestRepeat",
+							Time:   0,
+							Result: parser.PASS,
+							Output: []string{},
+						},
+					},
+				},
+			},
+		},
+	},
 }
 
 func TestParser(t *testing.T) {

parser/parser.go

@@ -198,7 +198,7 @@ func parseTime(time string) int {
 }
 
 func findTest(tests []*Test, name string) *Test {
-	for i := 0; i < len(tests); i++ {
+	for i := len(tests) - 1; i >= 0; i-- {
 		if tests[i].Name == name {
 			return tests[i]
 		}

tests/16-repeated-names.txt

@@ -0,0 +1,8 @@
+=== RUN   TestRepeat
+--- PASS: TestRepeat (0.00s)
+=== RUN   TestRepeat
+--- PASS: TestRepeat (0.00s)
+=== RUN   TestRepeat
+--- PASS: TestRepeat (0.00s)
+PASS
+ok      package/repeated-names    0.001s

tests/16-report.xml

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<testsuites>
+	<testsuite tests="3" failures="0" time="0.001" name="package/repeated-names">
+		<properties>
+			<property name="go.version" value="1.0"></property>
+		</properties>
+		<testcase classname="repeated-names" name="TestRepeat" time="0.000"></testcase>
+		<testcase classname="repeated-names" name="TestRepeat" time="0.000"></testcase>
+		<testcase classname="repeated-names" name="TestRepeat" time="0.000"></testcase>
+	</testsuite>
+</testsuites>