add dolt queries test

go/libraries/doltcore/sqle/enginetest/dolt_engine_tests.go

@@ -1026,6 +1026,7 @@ func RunDoltCheckoutTests(t *testing.T, h DoltEnginetestHarness) {
 		func() {
 			h := h.NewHarness(t)
 			defer h.Close()
+			h.UseLocalFileSystem()
 			enginetest.TestScript(t, h, script)
 		}()
 	}

go/libraries/doltcore/sqle/enginetest/dolt_queries.go

@@ -3392,6 +3392,50 @@ var DoltCheckoutScripts = []queries.ScriptTest{
 			},
 		},
 	},
+	{
+		Name: "dolt_checkout disambiguation with remote tracking branch and table",
+		SetUpScript: []string{
+			"call dolt_remote('add','origin','file://../remote-repo');",
+			"create table feature (id int primary key, value int);",
+			"insert into feature values (1, 100);",
+			"call dolt_add('.');",
+			"call dolt_commit('-m', 'Add feature table');",
+			"call dolt_checkout('-b', 'feature');",
+			"insert into feature values (2, 200);",
+			"call dolt_add('.');",
+			"call dolt_commit('-m', 'Add row to feature table');",
+			"call dolt_push('origin', 'feature');",
+			"call dolt_checkout('main');",
+			"update feature set value = 101 where id = 1;",
+			"call dolt_branch('-D', 'feature');", // Remove local branch to force remote tracking branch ambiguity
+		},
+		Assertions: []queries.ScriptTestAssertion{
+			{
+				Query:    "call dolt_checkout('--', 'feature');",
+				Expected: []sql.Row{{0, ""}},
+			},
+			{
+				Query:    "select * from feature order by id;",
+				Expected: []sql.Row{{1, 100}},
+			},
+			{
+				Query:          "call dolt_checkout('feature')",
+				ExpectedErrStr: "'feature' could be both a local table and a tracking branch.\nPlease use -- to disambiguate.",
+			},
+			{
+				Query:    "call dolt_checkout('feature', '--');",
+				Expected: []sql.Row{{0, "Switched to branch 'feature'\nbranch 'feature' set up to track 'origin/feature'."}},
+			},
+			{
+				Query:    "select active_branch();",
+				Expected: []sql.Row{{"feature"}},
+			},
+			{
+				Query:    "select * from feature order by id;",
+				Expected: []sql.Row{{1, 100}, {2, 200}},
+			},
+		},
+	},
 }
 
 var DoltCheckoutReadOnlyScripts = []queries.ScriptTest{