Add GetCodeownersErrors to RepositoriesService (#2408)

Fixes: #2405 .

github/repos_codeowners.go

@@ -0,0 +1,46 @@
+// Copyright 2022 The go-github AUTHORS. All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package github
+
+import (
+	"context"
+	"fmt"
+)
+
+// CodeownersErrors represents a list of syntax errors detected in the CODEOWNERS file.
+type CodeownersErrors struct {
+	Errors []*CodeownersError `json:"errors"`
+}
+
+// CodeownersError represents a syntax error detected in the CODEOWNERS file.
+type CodeownersError struct {
+	Line       int     `json:"line"`
+	Column     int     `json:"column"`
+	Kind       string  `json:"kind"`
+	Source     string  `json:"source"`
+	Suggestion *string `json:"suggestion,omitempty"`
+	Message    string  `json:"message"`
+	Path       string  `json:"path"`
+}
+
+// GetCodeownersErrors lists any syntax errors that are detected in the CODEOWNERS file.
+//
+// GitHub API docs: https://docs.github.com/en/rest/repos/repos#list-codeowners-errors
+func (s *RepositoriesService) GetCodeownersErrors(ctx context.Context, owner, repo string) (*CodeownersErrors, *Response, error) {
+	u := fmt.Sprintf("repos/%v/%v/codeowners/errors", owner, repo)
+	req, err := s.client.NewRequest("GET", u, nil)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	codeownersErrors := &CodeownersErrors{}
+	resp, err := s.client.Do(ctx, req, codeownersErrors)
+	if err != nil {
+		return nil, resp, err
+	}
+
+	return codeownersErrors, resp, nil
+}

github/repos_codeowners_test.go

@@ -0,0 +1,110 @@
+// Copyright 2022 The go-github AUTHORS. All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package github
+
+import (
+	"context"
+	"fmt"
+	"net/http"
+	"testing"
+
+	"github.com/google/go-cmp/cmp"
+)
+
+func TestRepositoriesService_GetCodeownersErrors(t *testing.T) {
+	client, mux, _, teardown := setup()
+	defer teardown()
+
+	mux.HandleFunc("/repos/o/r/codeowners/errors", func(w http.ResponseWriter, r *http.Request) {
+		testMethod(t, r, "GET")
+		testHeader(t, r, "Accept", mediaTypeV3)
+		fmt.Fprint(w, `{
+		  "errors": [
+			{
+			  "line": 1,
+			  "column": 1,
+			  "kind": "Invalid pattern",
+			  "source": "***/*.rb @monalisa",
+			  "suggestion": "Did you mean **/*.rb?",
+			  "message": "Invalid pattern on line 3: Did you mean **/*.rb?\n\n  ***/*.rb @monalisa\n  ^",
+			  "path": ".github/CODEOWNERS"
+			}
+		  ]
+		}
+	`)
+	})
+
+	ctx := context.Background()
+	codeownersErrors, _, err := client.Repositories.GetCodeownersErrors(ctx, "o", "r")
+	if err != nil {
+		t.Errorf("Repositories.GetCodeownersErrors returned error: %v", err)
+	}
+
+	want := &CodeownersErrors{
+		Errors: []*CodeownersError{
+			{
+				Line:       1,
+				Column:     1,
+				Kind:       "Invalid pattern",
+				Source:     "***/*.rb @monalisa",
+				Suggestion: String("Did you mean **/*.rb?"),
+				Message:    "Invalid pattern on line 3: Did you mean **/*.rb?\n\n  ***/*.rb @monalisa\n  ^",
+				Path:       ".github/CODEOWNERS",
+			},
+		},
+	}
+	if !cmp.Equal(codeownersErrors, want) {
+		t.Errorf("Repositories.GetCodeownersErrors returned %+v, want %+v", codeownersErrors, want)
+	}
+
+	const methodName = "GetCodeownersErrors"
+	testBadOptions(t, methodName, func() (err error) {
+		_, _, err = client.Repositories.GetCodeownersErrors(ctx, "\n", "\n")
+		return err
+	})
+
+	testNewRequestAndDoFailure(t, methodName, client, func() (*Response, error) {
+		got, resp, err := client.Repositories.GetCodeownersErrors(ctx, "o", "r")
+		if got != nil {
+			t.Errorf("testNewRequestAndDoFailure %v = %#v, want nil", methodName, got)
+		}
+		return resp, err
+	})
+}
+
+func TestCodeownersErrors_Marshal(t *testing.T) {
+	testJSONMarshal(t, &CodeownersErrors{}, "{}")
+
+	u := &CodeownersErrors{
+		Errors: []*CodeownersError{
+			{
+				Line:       1,
+				Column:     1,
+				Kind:       "Invalid pattern",
+				Source:     "***/*.rb @monalisa",
+				Suggestion: String("Did you mean **/*.rb?"),
+				Message:    "Invalid pattern on line 3: Did you mean **/*.rb?\n\n  ***/*.rb @monalisa\n  ^",
+				Path:       ".github/CODEOWNERS",
+			},
+		},
+	}
+
+	want := `{
+	  "errors": [
+		{
+		  "line": 1,
+		  "column": 1,
+		  "kind": "Invalid pattern",
+		  "source": "***/*.rb @monalisa",
+		  "suggestion": "Did you mean **/*.rb?",
+		  "message": "Invalid pattern on line 3: Did you mean **/*.rb?\n\n  ***/*.rb @monalisa\n  ^",
+		  "path": ".github/CODEOWNERS"
+		}
+	  ]
+	}
+`
+	testJSONMarshal(t, u, want)
+}