fix: Project.getSourceFile - Getting a source file by relative path should work.

Previously it would return based on matching the path with all the descendant source files.

Author: dsherret

src/Project.ts

@@ -326,10 +326,11 @@ export class Project {
         let searchFunction = fileNameOrSearchFunction as ((file: SourceFile) => boolean);
 
         if (typeof fileNameOrSearchFunction === "string") {
-            if (FileUtils.pathIsAbsolute(fileNameOrSearchFunction))
-                return this.global.compilerFactory.getSourceFileFromCacheFromFilePath(fileNameOrSearchFunction);
+            const fileNameOrPath = FileUtils.standardizeSlashes(fileNameOrSearchFunction);
+            if (FileUtils.pathIsAbsolute(fileNameOrPath) || fileNameOrPath.indexOf("/") >= 0)
+                return this.global.compilerFactory.getSourceFileFromCacheFromFilePath(fileNameOrPath);
             else
-                searchFunction = def => FileUtils.pathEndsWith(def.getFilePath(), fileNameOrSearchFunction);
+                searchFunction = def => FileUtils.pathEndsWith(def.getFilePath(), fileNameOrPath);
         }
 
         return ArrayUtils.find(this.global.compilerFactory.getSourceFilesByDirectoryDepth(), searchFunction);

src/tests/projectTests.ts

@@ -511,6 +511,27 @@ describe(nameof(Project), () => {
             expect(project.getSourceFile("file.ts")!.getFilePath()).to.equal(expectedFile.getFilePath());
         });
 
+        it("should get the first match based on the directory structure when specifying a dot slash", () => {
+            const project = new Project({ useVirtualFileSystem: true });
+            project.createSourceFile("dir/file.ts");
+            const expectedFile = project.createSourceFile("file.ts");
+            expect(project.getSourceFile("./file.ts")!.getFilePath()).to.equal(expectedFile.getFilePath());
+        });
+
+        it("should get the first match based on the directory structure when using ../", () => {
+            const project = new Project({ useVirtualFileSystem: true });
+            const expectedFile = project.createSourceFile("dir/file.ts");
+            project.createSourceFile("file.ts");
+            expect(project.getSourceFile("dir/../dir/file.ts")!.getFilePath()).to.equal(expectedFile.getFilePath());
+        });
+
+        it("should get the first match based on a file name", () => {
+            const project = new Project({ useVirtualFileSystem: true });
+            project.createSourceFile("file.ts");
+            const expectedFile = project.createSourceFile("dir/file2.ts");
+            expect(project.getSourceFile("file2.ts")!.getFilePath()).to.equal(expectedFile.getFilePath());
+        });
+
         it("should get when specifying an absolute path", () => {
             const project = new Project({ useVirtualFileSystem: true });
             project.createSourceFile("dir/file.ts");