Remove duplicates

api/queries_pr.go

@@ -590,7 +590,21 @@ loop:
 		}
 	}
 
-	return prs, nil
+	return removeDuplicates(prs), nil
+}
+
+func removeDuplicates(prs []PullRequest) []PullRequest {
+	var check = make(map[int]struct{})
+	var uniqPRs []PullRequest
+
+	for _, pr := range prs {
+		if _, ok := check[pr.Number]; !ok {
+			check[pr.Number] = struct{}{}
+			uniqPRs = append(uniqPRs, pr)
+		}
+	}
+
+	return uniqPRs
 }
 
 func min(a, b int) int {

command/pr_test.go

@@ -240,6 +240,26 @@ No pull requests match your search
 	eq(t, reqBody.Variables.Labels, []string{"one", "two", "three"})
 }
 
+func TestPRList_filteringRemoveDuplicate(t *testing.T) {
+	initBlankContext("OWNER/REPO", "master")
+	http := initFakeHTTP()
+	http.StubRepoResponse("OWNER", "REPO")
+
+	jsonFile, _ := os.Open("../test/fixtures/prListWithDuplicates.json")
+	defer jsonFile.Close()
+	http.StubResponse(200, jsonFile)
+
+	output, err := RunCommand(prListCmd, "pr list -l one,two")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	eq(t, output.String(), `32	New feature	feature
+29	Fixed bad bug	hubot:bug-fix
+28	Improve documentation	docs
+`)
+}
+
 func TestPRList_filteringClosed(t *testing.T) {
 	initBlankContext("OWNER/REPO", "master")
 	http := initFakeHTTP()

test/fixtures/prListWithDuplicates.json

@@ -0,0 +1,50 @@
+{
+    "data": {
+        "repository": {
+            "pullRequests": {
+                "edges": [
+                    {
+                        "node": {
+                            "number": 32,
+                            "title": "New feature",
+                            "url": "https://github.com/monalisa/hello/pull/32",
+                            "headRefName": "feature"
+                        }
+                    },
+                    {
+                        "node": {
+                            "number": 32,
+                            "title": "New feature",
+                            "url": "https://github.com/monalisa/hello/pull/32",
+                            "headRefName": "feature"
+                        }
+                    },
+                    {
+                        "node": {
+                            "number": 29,
+                            "title": "Fixed bad bug",
+                            "url": "https://github.com/monalisa/hello/pull/29",
+                            "headRefName": "bug-fix",
+                            "isCrossRepository": true,
+                            "headRepositoryOwner": {
+                                "login": "hubot"
+                            }
+                        }
+                    },
+                    {
+                        "node": {
+                            "number": 28,
+                            "title": "Improve documentation",
+                            "url": "https://github.com/monalisa/hello/pull/28",
+                            "headRefName": "docs"
+                        }
+                    }
+                ],
+                "pageInfo": {
+                    "hasNextPage": false,
+                    "endCursor": ""
+                }
+            }
+        }
+    }
+}