Add support for prebuilt sharp binaries on common platforms

test/unit/libvips.js

@@ -0,0 +1,62 @@
+'use strict';
+
+const assert = require('assert');
+const semver = require('semver');
+const libvips = require('../../lib/libvips');
+
+const originalPlatform = process.platform;
+
+const setPlatform = function (platform) {
+  Object.defineProperty(process, 'platform', { value: platform });
+};
+
+const restorePlatform = function () {
+  setPlatform(originalPlatform);
+};
+
+describe('libvips binaries', function () {
+  describe('Windows platform', function () {
+    before(function () { setPlatform('win32'); });
+    after(restorePlatform);
+
+    it('pkgConfigPath returns empty string', function () {
+      assert.strictEqual('', libvips.pkgConfigPath());
+    });
+    it('globalLibvipsVersion returns empty string', function () {
+      assert.strictEqual('', libvips.globalLibvipsVersion());
+    });
+    it('globalLibvipsVersion is always false', function () {
+      assert.strictEqual(false, libvips.useGlobalLibvips());
+    });
+  });
+
+  describe('non-Windows platforms', function () {
+    before(function () { setPlatform('linux'); });
+    after(restorePlatform);
+
+    it('pkgConfigPath returns a string', function () {
+      const pkgConfigPath = libvips.pkgConfigPath();
+      assert.strictEqual('string', typeof pkgConfigPath);
+    });
+    it('globalLibvipsVersion returns a string', function () {
+      const globalLibvipsVersion = libvips.globalLibvipsVersion();
+      assert.strictEqual('string', typeof globalLibvipsVersion);
+    });
+    it('globalLibvipsVersion returns a boolean', function () {
+      const useGlobalLibvips = libvips.useGlobalLibvips();
+      assert.strictEqual('boolean', typeof useGlobalLibvips);
+    });
+  });
+
+  describe('platform agnostic', function () {
+    it('minimumLibvipsVersion returns a valid semver', function () {
+      const minimumLibvipsVersion = libvips.minimumLibvipsVersion;
+      assert.strictEqual('string', typeof minimumLibvipsVersion);
+      assert.notStrictEqual(null, semver.valid(minimumLibvipsVersion));
+    });
+    it('hasVendoredLibvips returns a boolean', function () {
+      const hasVendoredLibvips = libvips.hasVendoredLibvips();
+      assert.strictEqual('boolean', typeof hasVendoredLibvips);
+    });
+  });
+});