Add test for microsoft#34502

Author: sheetalkamat

src/testRunner/unittests/tsc/incremental.ts

@@ -36,5 +36,23 @@ namespace ts {
             commandLineArgs: ["--p", "src/project", "--rootDir", "src/project/src"],
             incrementalScenarios: [noChangeRun]
         });
+
+        verifyTscIncrementalEdits({
+            scenario: "incremental",
+            subScenario: "when passing rootDir is in the tsconfig",
+            fs: () => loadProjectFromFiles({
+                "/src/project/src/main.ts": "export const x = 10;",
+                "/src/project/tsconfig.json": utils.dedent`
+                    {
+                        "compilerOptions": {
+                            "incremental": true,
+                            "outDir": "./built",
+                            "rootDir": "./"
+                        },
+                    }`,
+            }),
+            commandLineArgs: ["--p", "src/project"],
+            incrementalScenarios: [noChangeRun]
+        });
     });
 }

tests/baselines/reference/tsc/incremental/initial-build/when-passing-rootDir-is-in-the-tsconfig.js

@@ -0,0 +1,41 @@
+//// [/lib/initial-buildOutput.txt]
+/lib/tsc --p src/project
+exitCode:: ExitStatus.Success
+
+
+//// [/src/project/built/src/main.js]
+"use strict";
+exports.__esModule = true;
+exports.x = 10;
+
+
+//// [/src/project/built/tsconfig.tsbuildinfo]
+{
+  "program": {
+    "fileInfos": {
+      "../../../lib/lib.d.ts": {
+        "version": "3858781397-/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }\ninterface ReadonlyArray<T> {}\ndeclare const console: { log(msg: any): void; };",
+        "signature": "3858781397-/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }\ninterface ReadonlyArray<T> {}\ndeclare const console: { log(msg: any): void; };"
+      },
+      "../src/main.ts": {
+        "version": "-10726455937-export const x = 10;",
+        "signature": "-6057683066-export declare const x = 10;\r\n"
+      }
+    },
+    "options": {
+      "incremental": true,
+      "outDir": "./",
+      "rootDir": "..",
+      "project": "..",
+      "configFilePath": "../tsconfig.json"
+    },
+    "referencedMap": {},
+    "exportedModulesMap": {},
+    "semanticDiagnosticsPerFile": [
+      "../../../lib/lib.d.ts",
+      "../src/main.ts"
+    ]
+  },
+  "version": "FakeTSVersion"
+}
+

tests/baselines/reference/tsc/incremental/no-change-run/when-passing-rootDir-is-in-the-tsconfig.js

@@ -0,0 +1,7 @@
+//// [/lib/no-change-runOutput.txt]
+/lib/tsc --p src/project
+exitCode:: ExitStatus.Success
+
+
+//// [/src/project/built/src/main.js] file written with same contents
+//// [/src/project/built/tsconfig.tsbuildinfo] file written with same contents