Make name comparison case-insensitive (#172)

Signed-off-by: Simeon Widdis <sawiddis@amazon.com>

approval.go

@@ -136,12 +136,12 @@ func (a *approvalEnvironment) SetActionOutputs(outputs map[string]string) (bool,
 	// two outputs from being written on the same line.
 	fileInfo, err := f.Stat()
 	if err != nil {
-			return false, err
+		return false, err
 	}
 	if fileInfo.Size() > 0 {
-			if _, err := f.WriteString("\n"); err != nil {
-					return false, err
-			}
+		if _, err := f.WriteString("\n"); err != nil {
+			return false, err
+		}
 	}
 
 	if _, err := f.WriteString(strings.Join(pairs, "\n")); err != nil {
@@ -194,7 +194,7 @@ func approvalFromComments(comments []*github.IssueComment, approvers []string, m
 
 func approversIndex(approvers []string, name string) int {
 	for idx, approver := range approvers {
-		if approver == name {
+		if strings.EqualFold(approver, name) {
 			return idx
 		}
 	}

approval_test.go

@@ -3,6 +3,7 @@ package main
 import (
 	"errors"
 	"os"
+	"strings"
 	"testing"
 
 	"github.com/google/go-github/v43/github"
@@ -16,6 +17,8 @@ func TestApprovalFromComments(t *testing.T) {
 	bodyDenied := "Denied"
 	bodyPending := "not approval or denial"
 
+	login1u := strings.ToUpper(login1)
+
 	testCases := []struct {
 		name             string
 		comments         []*github.IssueComment
@@ -160,6 +163,17 @@ func TestApprovalFromComments(t *testing.T) {
 			expectedStatus:   approvalStatusPending,
 			minimumApprovals: 2,
 		},
+		{
+			name: "single_approver_single_comment_approved_case_insensitive",
+			comments: []*github.IssueComment{
+				{
+					User: &github.User{Login: &login1u},
+					Body: &bodyApproved,
+				},
+			},
+			approvers:      []string{login1},
+			expectedStatus: approvalStatusApproved,
+		},
 	}
 
 	for _, testCase := range testCases {