chore: add test for resolving aliases from nested path

benyap · May 14, 2022 · 1e8aaf0 · 1e8aaf0
1 parent ad267c5
commit 1e8aaf0
Show file tree

Hide file tree

Showing 2 changed files with 27 additions and 3 deletions.
diff --git a/src/steps/loadTSConfig.ts b/src/steps/loadTSConfig.ts
@@ -9,7 +9,7 @@ import { TSConfigPropertyError } from "~/utils/errors";
  * Load the tsconfig file. If the file extends another tsconfig,
  * it will be recursively loaded.
  *
- * @param path The path to the tsconfig file.
+ * @param basePath The path to the tsconfig file.
  */
 export function loadTSConfig(basePath: string): TSConfig {
   const baseConfig = loadJSON<TSConfig>(basePath, "loadTSConfig");

diff --git a/test/steps/computeAliases.test.ts b/test/steps/computeAliases.test.ts
@@ -1,8 +1,10 @@
+import { resolve } from "path";
+
 import { computeAliases } from "~/steps/computeAliases";
 
 describe("steps/computeAliases", () => {
-  it("computes aliases correctly", () => {
-    const aliases = computeAliases(".", {
+  it("computes aliases correctly from the root path", () => {
+    const aliases = computeAliases(resolve("."), {
       compilerOptions: {
         paths: {
           "*": ["./lib/*"],
@@ -22,4 +24,26 @@ describe("steps/computeAliases", () => {
     expect(aliases[1].aliasPaths).toEqual([`${cwd}/src`, `${cwd}/root`]);
     expect(aliases[2].aliasPaths).toEqual([`${cwd}/src/app`]);
   });
+
+  it("computes aliases correctly using a nested path", () => {
+    const aliases = computeAliases(resolve("./src"), {
+      compilerOptions: {
+        paths: {
+          "*": ["../lib/*"],
+          "~/*": ["./*", "../root/*"],
+          "@app": ["./app/*"],
+        },
+      },
+    });
+
+    expect(aliases).toHaveLength(3);
+    expect(aliases[0].prefix).toEqual("");
+    expect(aliases[1].prefix).toEqual("~/");
+    expect(aliases[2].prefix).toEqual("@app");
+
+    const cwd = process.cwd();
+    expect(aliases[0].aliasPaths).toEqual([`${cwd}/lib`]);
+    expect(aliases[1].aliasPaths).toEqual([`${cwd}/src`, `${cwd}/root`]);
+    expect(aliases[2].aliasPaths).toEqual([`${cwd}/src/app`]);
+  });
 });