You are an expert code reviewer. Your task is to analyze the provided code files and provide a comprehensive code review. For each file, consider:

1. Code Quality: Assess readability, maintainability, and adherence to best practices
2. Potential Issues: Identify bugs, security vulnerabilities, or performance concerns
3. Suggestions: Provide specific recommendations for improvements

Format your review as follows:
1. Start with a brief overview of all files
2. For each file, provide:
   - A summary of the file's purpose
   - Key findings (both positive and negative)
   - Specific recommendations
3. End with any overall suggestions for the codebase

Your review should be detailed but concise, focusing on the most important aspects of the code.

Files to review:

File: ./__tests__/lib/env_test.ts
Content:
import {
  assertEquals,
  assertThrows,
} from "https://deno.land/std@0.208.0/assert/mod.ts";
import { loadEnv, loadAndParseEnv, envSchema, Env } from "../../src/lib/env.ts";
import { z } from "https://deno.land/x/zod@v3.21.4/mod.ts";

Deno.test("loadEnv function", async () => {
  const testEnvPath = "./test.env";
  await Deno.writeTextFile(
    testEnvPath,
    "TEST_KEY=test_value\nNUMBER=42\nARRAY=item1 item2 item3"
  );

  try {
    const result = await loadEnv(testEnvPath);
    assertEquals(result.TEST_KEY, "test_value");
    assertEquals(result.NUMBER, 42);
    assertEquals(result.ARRAY, ["item1", "item2", "item3"]);
  } finally {
    await Deno.remove(testEnvPath);
  }
});

Deno.test("loadAndParseEnv function", async () => {
  const testEnvPath = "./test.env";
  await Deno.writeTextFile(testEnvPath, "NODE_ENV=production");

  try {
    const result = await loadAndParseEnv(testEnvPath);
    assertEquals(result.NODE_ENV, "production");
  } finally {
    await Deno.remove(testEnvPath);
  }
});

Deno.test("envSchema validation", () => {
  const validEnv = { NODE_ENV: "development" };
  const invalidEnv = { NODE_ENV: "invalid" };

  assertEquals(envSchema.parse(validEnv).NODE_ENV, "development");
  assertThrows(() => envSchema.parse(invalidEnv), z.ZodError);
});

Deno.test("Env type", () => {
  const env: Env = { NODE_ENV: "test" };
  assertEquals(env.NODE_ENV, "test");
});

Deno.test("loadEnv with non-existent file", async () => {
  const result = await loadEnv("non_existent.env");
  assertEquals(Object.keys(result).length, 0);
});

Deno.test("loadAndParseEnv with custom path", async () => {
  const testEnvPath = "./custom.env";
  await Deno.writeTextFile(testEnvPath, "NODE_ENV=test");

  try {
    const result = await loadAndParseEnv(testEnvPath);
    assertEquals(result.NODE_ENV, "test");
  } finally {
    await Deno.remove(testEnvPath);
  }
});

Deno.test({
  name: "loadAndParseEnv with environment access",
  permissions: { env: true, read: true, write: true },
  async fn() {
    const testEnvPath = "./test.env";
    await Deno.writeTextFile(testEnvPath, "NODE_ENV=production");

    try {
      const result = await loadAndParseEnv(testEnvPath);
      assertEquals(result.NODE_ENV, "production");
    } finally {
      await Deno.remove(testEnvPath);
    }
  },
});



PROMPT: You are an expert code reviewer. Your task is to analyze the provided code files and provide a comprehensive code review. For each file, consider:

1. Code Quality: Assess readability, maintainability, and adherence to best practices
2. Potential Issues: Identify bugs, security vulnerabilities, or performance concerns
3. Suggestions: Provide specific recommendations for improvements

Format your review as follows:
1. Start with a brief overview of all files
2. For each file, provide:
   - A summary of the file's purpose
   - Key findings (both positive and negative)
   - Specific recommendations
3. End with any overall suggestions for the codebase

Your review should be detailed but concise, focusing on the most important aspects of the code.

Files to review:

File: ./__tests__/lib/env_test.ts
Content:
import {
  assertEquals,
  assertThrows,
} from "https://deno.land/std@0.208.0/assert/mod.ts";
import { loadEnv, loadAndParseEnv, envSchema, Env } from "../../src/lib/env.ts";
import { z } from "https://deno.land/x/zod@v3.21.4/mod.ts";

Deno.test("loadEnv function", async () => {
  const testEnvPath = "./test.env";
  await Deno.writeTextFile(
    testEnvPath,
    "TEST_KEY=test_value\nNUMBER=42\nARRAY=item1 item2 item3"
  );

  try {
    const result = await loadEnv(testEnvPath);
    assertEquals(result.TEST_KEY, "test_value");
    assertEquals(result.NUMBER, 42);
    assertEquals(result.ARRAY, ["item1", "item2", "item3"]);
  } finally {
    await Deno.remove(testEnvPath);
  }
});

Deno.test("loadAndParseEnv function", async () => {
  const testEnvPath = "./test.env";
  await Deno.writeTextFile(testEnvPath, "NODE_ENV=production");

  try {
    const result = await loadAndParseEnv(testEnvPath);
    assertEquals(result.NODE_ENV, "production");
  } finally {
    await Deno.remove(testEnvPath);
  }
});

Deno.test("envSchema validation", () => {
  const validEnv = { NODE_ENV: "development" };
  const invalidEnv = { NODE_ENV: "invalid" };

  assertEquals(envSchema.parse(validEnv).NODE_ENV, "development");
  assertThrows(() => envSchema.parse(invalidEnv), z.ZodError);
});

Deno.test("Env type", () => {
  const env: Env = { NODE_ENV: "test" };
  assertEquals(env.NODE_ENV, "test");
});

Deno.test("loadEnv with non-existent file", async () => {
  const result = await loadEnv("non_existent.env");
  assertEquals(Object.keys(result).length, 0);
});

Deno.test("loadAndParseEnv with custom path", async () => {
  const testEnvPath = "./custom.env";
  await Deno.writeTextFile(testEnvPath, "NODE_ENV=test");

  try {
    const result = await loadAndParseEnv(testEnvPath);
    assertEquals(result.NODE_ENV, "test");
  } finally {
    await Deno.remove(testEnvPath);
  }
});

Deno.test({
  name: "loadAndParseEnv with environment access",
  permissions: { env: true, read: true, write: true },
  async fn() {
    const testEnvPath = "./test.env";
    await Deno.writeTextFile(testEnvPath, "NODE_ENV=production");

    try {
      const result = await loadAndParseEnv(testEnvPath);
      assertEquals(result.NODE_ENV, "production");
    } finally {
      await Deno.remove(testEnvPath);
    }
  },
});