Move glob emptiness check to expander

package.json

@@ -1,6 +1,6 @@
 {
     "name": "fwdekker.com",
-    "version": "0.24.3",
+    "version": "0.24.4",
     "description": "The source code of [my personal website](https://fwdekker.com/).",
     "author": "Felix W. Dekker",
     "repository": {

src/main/js/InputParser.ts

@@ -431,7 +431,11 @@ export class Expander {
             }
         }
 
-        return this.globber.glob(expandedToken);
+        const tokens = this.globber.glob(expandedToken);
+        if (tokens.length === 0)
+            throw new IllegalArgumentError(`Token '${unescape(expandedToken)}' does not match any files.`);
+
+        return tokens;
     }
 }
 
@@ -470,16 +474,9 @@ export class Globber {
         if (!this.isGlob(token))
             return [token];
 
-        let tokens: string[];
-        if (token.startsWith("/"))
-            tokens = this.glob2("/", token.slice(1), new Path("/"));
-        else
-            tokens = this.glob2("", token, this.cwd);
-
-        if (tokens.length === 0)
-            throw new IllegalArgumentError(`Token '${unescape(token)}' does not match any files.`);
-
-        return tokens;
+        return token.startsWith("/")
+            ? this.glob2("/", token.slice(1), new Path("/"))
+            : this.glob2("", token, this.cwd);
     }
 
 

src/test/InputParser.spec.ts

@@ -643,6 +643,22 @@ describe("expander", () => {
             expect(expander.expand("'b?'")).to.have.deep.members(["b?"]);
             expect(expander.expand("\"b*\"")).to.have.deep.members(["b*"]);
         });
+
+        it("throws an error if the globber returns an empty array", () => {
+            const globber = new class extends Globber {
+                constructor() {
+                    super(new FileSystem(), "");
+                }
+
+
+                glob(): string[] {
+                    return [];
+                }
+            };
+            expander = new Expander(new Environment(), globber);
+
+            expect(() => expander.expand("arg")).to.throw();
+        });
     });
 
     describe("home directory", () => {
@@ -910,14 +926,14 @@ describe("globber", () => {
 
     describe("shared cases", () => {
         describe("no matches", () => {
-            it("throws an error if no matches are found", () => {
-                expect(() => createGlobber().glob(`x${escape}?`)).to.throw();
+            it("returns an empty array if no matches are found", () => {
+                expect(createGlobber().glob(`x${escape}?`)).to.have.deep.members([]);
             });
 
-            it("throws an error if no matches are found because the cwd does not exist", () => {
+            it("returns an empty array if no matches are found because the cwd does not exist", () => {
                 const globber = createGlobber({"/a1": new File()}, "/dir");
 
-                expect(() => globber.glob(`a${escape}?`)).to.throw();
+                expect(globber.glob(`a${escape}?`)).to.have.deep.members([]);
             });
         });