add test

__tests__/version.test.ts

@@ -0,0 +1,95 @@
+import {describe, expect, it, beforeEach, afterEach, jest} from '@jest/globals';
+import * as fs from 'fs';
+import * as os from 'os';
+import * as path from 'path';
+import * as core from '@actions/core';
+import {getRequestedVersion} from '../src/version';
+import {Inputs} from '../src/context';
+
+describe('getRequestedVersion', () => {
+  let tmpDir: string;
+
+  beforeEach(() => {
+    tmpDir = fs.mkdtempSync(path.join(os.tmpdir(), 'goreleaser-test-'));
+  });
+
+  afterEach(() => {
+    try {
+      fs.rmSync(tmpDir, {recursive: true, force: true});
+    } catch (e) {
+      console.error(`Failed to remove temp directory ${tmpDir}:`, e);
+    }
+  });
+
+  it('returns provided version when set', () => {
+    const inputs: Inputs = {
+      distribution: 'goreleaser',
+      version: 'v1.2.3',
+      versionFile: '',
+      args: '',
+      workdir: '',
+      installOnly: false
+    };
+
+    const v = getRequestedVersion(inputs);
+    expect(v).toBe('v1.2.3');
+  });
+
+  it('warns when both version and version-file are provided and returns version', () => {
+    const inputs: Inputs = {
+      distribution: 'goreleaser',
+      version: 'v9.9.9',
+      versionFile: '.tool-versions',
+      args: '',
+      workdir: '',
+      installOnly: false
+    };
+
+    const v = getRequestedVersion(inputs);
+    expect(v).toBe('v9.9.9');
+  });
+
+  it('throws when version is empty and version-file does not exist', () => {
+    const inputs: Inputs = {
+      distribution: 'goreleaser',
+      version: '',
+      versionFile: 'nonexistent-file',
+      args: '',
+      workdir: '',
+      installOnly: false
+    };
+
+    expect(() => getRequestedVersion(inputs)).toThrow();
+  });
+
+  it('parses .tool-versions and returns v-prefixed version', () => {
+    const toolVersionsPath = path.join(tmpDir, '.tool-versions');
+    fs.writeFileSync(toolVersionsPath, 'goreleaser 1.2.3\n');
+
+    const inputs: Inputs = {
+      distribution: 'goreleaser',
+      version: '',
+      versionFile: '.tool-versions',
+      args: '',
+      workdir: tmpDir,
+      installOnly: false
+    };
+
+    const v = getRequestedVersion(inputs);
+    expect(v).toBe('v1.2.3');
+  });
+
+  it('defaults to ~> v2 when nothing provided', () => {
+    const inputs: Inputs = {
+      distribution: 'goreleaser',
+      version: '',
+      versionFile: '',
+      args: '',
+      workdir: '',
+      installOnly: false
+    };
+
+    const v = getRequestedVersion(inputs);
+    expect(v).toBe('~> v2');
+  });
+});