perf: move Deno.writeTextFile and like functions to Rust (#14221)

Co-authored-by: Luca Casonato <hello@lcas.dev>

cli/tests/unit/write_file_test.ts

@@ -17,7 +17,7 @@ Deno.test(
     const dataRead = Deno.readFileSync(filename);
     const dec = new TextDecoder("utf-8");
     const actual = dec.decode(dataRead);
-    assertEquals("Hello", actual);
+    assertEquals(actual, "Hello");
   },
 );
 
@@ -34,7 +34,7 @@ Deno.test(
     const dataRead = Deno.readFileSync(fileUrl);
     const dec = new TextDecoder("utf-8");
     const actual = dec.decode(dataRead);
-    assertEquals("Hello", actual);
+    assertEquals(actual, "Hello");
 
     Deno.removeSync(tempDir, { recursive: true });
   },
@@ -92,7 +92,7 @@ Deno.test(
     const dataRead = Deno.readFileSync(filename);
     const dec = new TextDecoder("utf-8");
     const actual = dec.decode(dataRead);
-    assertEquals("Hello", actual);
+    assertEquals(actual, "Hello");
   },
 );
 
@@ -107,17 +107,17 @@ Deno.test(
     let dataRead = Deno.readFileSync(filename);
     const dec = new TextDecoder("utf-8");
     let actual = dec.decode(dataRead);
-    assertEquals("HelloHello", actual);
+    assertEquals(actual, "HelloHello");
     // Now attempt overwrite
     Deno.writeFileSync(filename, data, { append: false });
     dataRead = Deno.readFileSync(filename);
     actual = dec.decode(dataRead);
-    assertEquals("Hello", actual);
+    assertEquals(actual, "Hello");
     // append not set should also overwrite
     Deno.writeFileSync(filename, data);
     dataRead = Deno.readFileSync(filename);
     actual = dec.decode(dataRead);
-    assertEquals("Hello", actual);
+    assertEquals(actual, "Hello");
   },
 );
 
@@ -131,7 +131,7 @@ Deno.test(
     const dataRead = Deno.readFileSync(filename);
     const dec = new TextDecoder("utf-8");
     const actual = dec.decode(dataRead);
-    assertEquals("Hello", actual);
+    assertEquals(actual, "Hello");
   },
 );
 
@@ -148,7 +148,7 @@ Deno.test(
     const dataRead = Deno.readFileSync(fileUrl);
     const dec = new TextDecoder("utf-8");
     const actual = dec.decode(dataRead);
-    assertEquals("Hello", actual);
+    assertEquals(actual, "Hello");
 
     Deno.removeSync(tempDir, { recursive: true });
   },
@@ -212,7 +212,7 @@ Deno.test(
     const dataRead = Deno.readFileSync(filename);
     const dec = new TextDecoder("utf-8");
     const actual = dec.decode(dataRead);
-    assertEquals("Hello", actual);
+    assertEquals(actual, "Hello");
   },
 );
 
@@ -227,17 +227,17 @@ Deno.test(
     let dataRead = Deno.readFileSync(filename);
     const dec = new TextDecoder("utf-8");
     let actual = dec.decode(dataRead);
-    assertEquals("HelloHello", actual);
+    assertEquals(actual, "HelloHello");
     // Now attempt overwrite
     await Deno.writeFile(filename, data, { append: false });
     dataRead = Deno.readFileSync(filename);
     actual = dec.decode(dataRead);
-    assertEquals("Hello", actual);
+    assertEquals(actual, "Hello");
     // append not set should also overwrite
     await Deno.writeFile(filename, data);
     dataRead = Deno.readFileSync(filename);
     actual = dec.decode(dataRead);
-    assertEquals("Hello", actual);
+    assertEquals(actual, "Hello");
   },
 );
 
@@ -256,8 +256,6 @@ Deno.test(
       assert(e instanceof Error);
       assertEquals(e.name, "AbortError");
     }
-    const stat = Deno.statSync(filename);
-    assertEquals(stat.size, 0);
   },
 );
 
@@ -276,8 +274,6 @@ Deno.test(
     } catch (e) {
       assertEquals(e, abortReason);
     }
-    const stat = Deno.statSync(filename);
-    assertEquals(stat.size, 0);
   },
 );
 
@@ -295,8 +291,6 @@ Deno.test(
     } catch (e) {
       assertEquals(e, "Some string");
     }
-    const stat = Deno.statSync(filename);
-    assertEquals(stat.size, 0);
   },
 );
 
@@ -315,8 +309,7 @@ Deno.test(
       assert(e instanceof Error);
       assertEquals(e.name, "AbortError");
     }
-    const stat = Deno.statSync(filename);
-    assertEquals(stat.size, 0);
+    assertNotExists(filename);
   },
 );
 
@@ -335,8 +328,7 @@ Deno.test(
     } catch (e) {
       assertEquals(e, abortReason);
     }
-    const stat = Deno.statSync(filename);
-    assertEquals(stat.size, 0);
+    assertNotExists(filename);
   },
 );
 
@@ -356,7 +348,21 @@ Deno.test(
     } catch (e) {
       assertEquals(e, "Some string");
     }
-    const stat = Deno.statSync(filename);
-    assertEquals(stat.size, 0);
+    assertNotExists(filename);
   },
 );
+
+function assertNotExists(filename: string | URL) {
+  if (pathExists(filename)) {
+    throw new Error(`The file ${filename} exists.`);
+  }
+}
+
+function pathExists(path: string | URL) {
+  try {
+    Deno.statSync(path);
+    return true;
+  } catch {
+    return false;
+  }
+}