Fix bug in author_can_merge

Signed-off-by: Galo Navarro <anglorvaroa@gmail.com>

pkg/condition_author_can_merge.go

@@ -2,6 +2,7 @@ package labeler
 
 import (
 	"fmt"
+	"strconv"
 )
 
 func AuthorCanMergeCondition() Condition {
@@ -10,16 +11,31 @@ func AuthorCanMergeCondition() Condition {
 			return "Author can merge"
 		},
 		CanEvaluate: func(target *Target) bool {
-			return true
+			return target.ghPR != nil
 		},
 		Evaluate: func(target *Target, matcher LabelMatcher) (bool, error) {
-			if len(matcher.AuthorCanMerge) <= 0 {
-				return false, fmt.Errorf("AuthorCanMerge not set in repository")
+			expected, err := strconv.ParseBool(matcher.AuthorCanMerge)
+			if err != nil {
+				return false, fmt.Errorf("author-can-merge doesn't have a valid value in config")
 			}
+
 			ghRepo := target.ghPR.GetAuthorAssociation()
 			canMerge := ghRepo == "OWNER"
-			fmt.Printf("User: %s can merge? %t\n", target.Author, canMerge)
-			return canMerge, nil
+
+			if expected && canMerge {
+				fmt.Printf("User: %s can merge %t, condition matched\n",
+					target.Author, canMerge)
+				return true, nil
+			}
+
+			if !expected && !canMerge {
+				fmt.Printf("User: %s can not merge %t, condition matched\n",
+					target.Author, canMerge)
+				return true, nil
+			}
+
+			fmt.Printf("Condition not matched")
+			return false, nil
 		},
 	}
 }

pkg/labeler_test.go

@@ -592,7 +592,7 @@ func TestHandleEvent(t *testing.T) {
 		{
 			event:    "pull_request",
 			payloads: []string{"create_pr_non_owner"},
-			name:     "Add a label when the author cannot merge",
+			name:     "Remove a label when the author cannot merge",
 			config: LabelerConfigV1{
 				Version: 1,
 				Labels: []LabelMatcher{
@@ -605,6 +605,56 @@ func TestHandleEvent(t *testing.T) {
 			initialLabels:  []string{"Test"},
 			expectedLabels: []string{},
 		},
+		{
+			event:    "pull_request",
+			payloads: []string{"create_pr_non_owner"},
+			name:     "Add a label when the author cannot merge",
+			config: LabelerConfigV1{
+				Version: 1,
+				Labels: []LabelMatcher{
+					{
+						Label:          "Test",
+						AuthorCanMerge: "False",
+					},
+				},
+			},
+			initialLabels:  []string{},
+			expectedLabels: []string{"Test"},
+		},
+		{
+			event:    "pull_request",
+			payloads: []string{"create_pr"},
+			name:     "Remove label when the author can merge",
+			config: LabelerConfigV1{
+				Version: 1,
+				Labels: []LabelMatcher{
+					{
+						Label:          "Test",
+						AuthorCanMerge: "False",
+					},
+				},
+			},
+			initialLabels:  []string{"Test"},
+			expectedLabels: []string{},
+		},
+		{
+			event:    "pull_request",
+			payloads: []string{"create_pr"},
+			name:     "Negate when the author can merge",
+			config: LabelerConfigV1{
+				Version: 1,
+				Labels: []LabelMatcher{
+					{
+						Label:          "Test",
+						Draft:          "False", // payload is not a draft
+						AuthorCanMerge: "True",  // payload author is the owner
+						Negate:         true,    // both matchers are true, result should be false
+					},
+				},
+			},
+			initialLabels:  []string{"Test"},
+			expectedLabels: []string{},
+		},
 
 		// Issues